JP2008121374A - Structure for embedding expansion joint in highway bridge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve the complete water-sealing effect and high load-bearing strength of an expansion gap. <P>SOLUTION: A supporting base (B1) for an expansion joint comprises: a pair of front leg plates (9) which are installed in the opposed state of sandwiching the expansion gap (S) in between; an elastic water-sealing belt (10) which is attached to both the front leg plates; a base distributing anchor (11) which overhangs backward from both the front leg plates; and an anchor support (12) which is raised from each of the base distributing anchors in such a manner as to be higher than the front base plate. The supporting base (B1) is installed in the blockout recess (G) of the road bridge; the base distributing anchor (11) is assembled and welded to an existing embedded bar (5); the anchor support is assembled and welded to a joint distributing anchor (23) which has already been provided in expansion joints (A1)-(A3) themselves; and the anchor support of the supporting base, which is embedded and constructed at a stroke concurrently with the embedment of the expansion joint, is maintained to be capable of being repeatedly used for the assembly of a new expansion joint for replacement in each repair operation, by means of post-cast concrete (8) for being placed in the blockout recess. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a buried structure of an expansion joint capable of obtaining a complete water stop effect of a gap (seam) in a road bridge, and is particularly useful for a long-span bridge that requires even greater load bearing strength.

  In general, concrete floor slabs sandwiching the gap between road bridges or their floor slabs and abutments are cut into box-shaped recesses facing each other in an almost L-shape in side view, and load-supporting expansion joints installed inside are provided. It is buried by laying concrete afterwards.

  In addition, there are a plurality of force distribution bars that protrude in the backward direction (bridge axis direction) opposite from the expansion joint itself, and a substantially U-shaped embedded reinforcement that rises in advance from the bottom surface of the boxing recess. It is customary to be assembled and integrated by in-situ welding at each intersection through a plurality of through bars that run horizontally along the direction perpendicular to the distribution bar (bridge width direction).

  As a result, when repairing the existing expansion joint by removing it and replacing it with a new one, the rebars in the three-dimensional crossover state are cut with a rebar cutter, and the post-cast concrete is removed with a concrete breaker. Although it must be scraped, it is extremely difficult to scrape it from the road surface in a short period of time until the depth of the scraping nears the bottom of the boxed recess.・ Dust will be generated and will adversely affect neighboring residents.

  In that case, if the rough work by the concrete breaker is performed with the effort, time, and cost in the unlikely event, the surface remaining after scraping of the cast concrete not only becomes a rough uneven surface, but also in the concrete slab and abutment There is a risk of missing corners on the idler side, cracks spreading on the concrete floor slabs and abutments, and dropping out of the floor slabs due to excessive scraping.

  In addition, it is necessary to drive incision anchors (hole-in anchors) for assembling new expansion joints into the concrete floor slab and abutment that remain after scraping. As plates and abutments become increasingly damaged and weakened, even the entire work may be reworked.

As a solution to such a problem, Japanese Utility Model Publication No. 59-7365 and Japanese Patent Application Laid-Open No. 2003-213611 improved thereon are proposed, and these are considered to be known techniques that basically approximate to the present invention. .
Japanese Utility Model Publication No.59-7365 JP 2003-213611 A

  However, the configuration disclosed in the former Japanese Utility Model Publication No. 59-7365 has not been put into practical use because of the following problems.

  That is, plate-like stepped surface members (1), (15), (19), and (20) with anchor bars (5) protruding in the reverse direction are placed on the precast concrete floor slab (lower concrete layer) (2). At the time of construction, it is necessary to preliminarily embed and integrate so as to cover the bottom surface (3a) of the notch step (box opening recess) (3). Such construction is actually carried out by the contractor of the precast concrete slab (2) and not by the contractor of the expansion joint (10).

  In the configuration of the above-mentioned known device, a contractor of the expansion joint (10) different from the contractor of the precast concrete floor slab (2) is placed in the notch step (3) of the precast concrete floor slab (2). The post-cast concrete (upper concrete layer) (7) does not embed and integrate the stepped surface members (1), (15), (19) and (20) at the same time as the expansion joint (10). It is.

  As a result, the notched step portion (1), (15), (19), and (20) is not after curing and hardening of the prestressed concrete floor slab (2) in which the preliminarily stepped portion surface members (1), (15), (19), and (20) are integrated. 3) The expansion joint (10) cannot be embedded in the interior, and not only the working efficiency is inferior, but also the depth of the notch step (3) preliminarily formed in the precast concrete slab (2) There may be a situation where the size of the expansion joint (10) to be installed and installed in the interior does not match correctly.

  Further, in the above-mentioned known device, a stepped concrete floor slab (2) is placed using the stepped surface members (1), (15), (19), and (20) as the forming frame of the notched stepped portion (3). However, since a pre-giving gibber muscle (6) is projected from the surface of the stepped surface member (1) (15) (19) (20), the seventh of the known device is described. Like the U-shaped bar (b) of the conventional example shown in the figure, the gibber bar (6) becomes an obstacle, and it is difficult to form the notch step (3) on the precast concrete floor slab (2). There is no change.

  In any case, the stepped surface members (1), (15), (19), and (20) of the above-mentioned known device are in one piece of plate material and are in close contact with the precast concrete floor slab (2). When the expansion joint (10) is repaired, the striking vibration of the concrete breaker that scrapes the post-cast concrete (7) propagates directly to the precast concrete floor slab (2) and cracks in the floor slab (2). May be caused.

  In addition, the stepped surface members (1), (15), (19), and (20) are flat plate surface members, such as precast concrete floor slab (lower concrete layer) (2) and post-cast concrete (upper concrete layer). ) And (7) are divided into disconnected states, so that even if anchor bars (5) or gibber bars (6) are protruding, the expansion joint (10) is subject to severe vibration or shock of a passing vehicle. During use, the smooth stepped surface members (1), (15), (19), and (20) become the peeling interface (concrete joint surface), and the above-mentioned leading edge The binding force between the concrete floor slab (2) and the post-cast concrete (7) is rather lowered, and a large load resistance strength cannot be exhibited.

  Furthermore, in the above-mentioned known device, although the entire drawing is inspected, the stepped surface members (1), (15), (19) and (20) of the prestressed concrete floor slab (2) have a gap (seam) ( 9) The shielding member which stops water is not attached at all. The above-mentioned clearance (9) can be said to be a single structure only by the expansion joint (10) made of rubber disk itself, the filler (17) of the clearance (9), and the seal member (25) baked and bonded to the corrugated end plate (21). The water is only stopped.

  Therefore, the expansion joint (10) itself of the rubber board tends to be worn out and fatigued easily, and the temperature change is particularly severe due to the fact that the filler (17) and the seal member (25) are easily peeled off. It cannot be applied to local road bridges or road bridges with a large amount of expansion and contraction. As a result, water leaks at an early stage. ) May drop, or the vehicle's passing sound may sound directly as noise.

  On the other hand, even in the latter configuration disclosed in Japanese Patent Application Laid-Open No. 2003-213611, the contractor of the road bridge body (floor slab) (1) forms the reinforcing plate (8) into the stepped portion (box opening recess) (7). As a formwork, it is necessary to embed the reinforcing plate (8) in advance in the covering state of the stepped portion (7) to the main body (1), and then the contractor of another expansion joint (4) Since the concrete receiving plate (12) must be overlapped and fastened to the reinforcing plate (8) from above, the expansion joint (4) and the reinforcing plate (8) are also connected at the same time as in the previously known device. It cannot be embedded and integrated into the stepped portion (7) of the main body (1).

  In that case, the reinforcing plate (8) and the concrete backing plate (12) that partition the road bridge body (1) and the post-cast concrete (5) into a disconnected state are in a superposed state with metal touch, In addition to the vibration and impact when passing through the vehicle, there is a risk of struck noise, and the stud bolt (10) protruding from the reinforcing plate (8) and the cap nut (13) are screwed together. The portion rusts due to permeated water and the like, and it becomes difficult to loosen the cap nut (13) when repairing the expansion joint (4).

  In addition, the position of the stud bolt (10) projecting from the reinforcing plate (8) in a pre-distributed state is correctly known from the road surface of the post-cast concrete (5) when repairing the expansion joint (4). Since it is impossible to obtain, there is no choice but to perform the core removal work of the hole (23) as if searching for the position, which requires a lot of labor and time.

  In this regard, when the protection cylinder (45) shown in FIG. 8 of the above-mentioned known invention is embedded so as to be covered with the cap nut (13), the protection cylinder (45) is placed on the concrete backing plate (12) when the vehicle passes. In addition, the reinforcing plate (8) is struck and it is inevitable to generate a large noise, and the durability is also hindered.

  When the anchor (11) of the reinforcing plate (8) shown in FIG. 9 of the above-mentioned known invention is driven into the hole (51) of the road bridge body (1), the processing of the hole (51) and this When the anchor (11) is driven into the crack, the main body (1) is cracked, and the main body (1) is further damaged and weakened.

  Further, in the configuration of the above-described known invention, as in the above-described known device, the shielding member of the gap (3) in the road bridge is not attached to the reinforcing plate (8) separate from the expansion joint (4). 4) The sealing member (17) inserted and installed in the corrugated plate (15) of itself itself has only water-stopping action and soundproofing action, and has not been put into practical use for the above reasons.

  The present invention aims to further improve such problems, and in order to achieve this, the independent claim 1 is installed in an opposing state with a gap between the road bridges, so that the post-cast concrete scraping depth at the time of repair is set. A pair of front leg plates indicating levels;

  An elastic water stop belt attached to the front leg plate in a shielded state between the play,

  Similarly, a plurality of base force anchors that are integrally projected as an array distribution state at required intervals in the opposite backward direction from both front leg plates,

  By using a support base for a free-flowing expansion joint of post-cast concrete composed of one or a plurality of anchor pillars standing upright and taller than the above-mentioned front leg plate from each base distribution anchor,

  Such a support base was installed in a state where the base distribution anchor floats from the bottom of the boxing recess to the bottom of the boxing recess formed between the concrete floor slabs of the road bridge or between the concrete floor slab and the abutment. Up,

  An assembly in which the base power distribution anchor of the support base is crossed with the base power distribution anchor in a crossed state from the bottom surface of the box-shaped recess to an existing embedded muscle and / or insertion bar anchor that has been erected in advance. While welding each through the primary thread for

  An assembly in which the existing joint distribution anchor provided by the expansion joint mounted on the support base is horizontally mounted on the anchor strut standing from the base distribution anchor of the support base in a crossed state with the joint distribution anchor. Welding each through the secondary thread for use,

  The support base anchor strut, which was embedded and integrated with the expansion joint at the same time, with the back cast concrete that was cast from above into the boxed recess, was repeated for the assembly of a new expansion joint that was replaced during repair. It is maintained so that it can be used.

  Further, in the independent claim 8, a pair of front leg plates that are set up in an opposing state across the gap between the road bridges,

  A pair of rear leg plates extending parallel to the front leg plate;

  By bridging each other between the front leg plate and the rear leg plate, as a side-view gate-like shape that bends in series from a substantially horizontal ceiling plate showing the post-cast concrete scraping depth level at the time of repair,

  While the portion remaining relatively with the post-cast concrete distribution port that is notched and distributed in each ceiling plate is used as a base distribution anchor, a plurality of anchor columns are integrally raised from here,

  Using a support base for an expansion joint, in which an elastic waterproof belt is attached to both front leg plates in a shielded state between the play,

  Such a support base was installed in a state where the base distribution anchor floats from the bottom of the boxing recess to the bottom of the boxing recess formed between the concrete floor slabs of the road bridge or between the concrete floor slab and the abutment. Up,

  An assembly in which the base power distribution anchor of the support base is crossed with the base power distribution anchor in a crossed state from the bottom surface of the box-shaped recess to an existing embedded muscle and / or insertion bar anchor that has been erected in advance. While welding each through the primary thread for

  An assembly in which the existing joint distribution anchor provided by the expansion joint mounted on the support base is horizontally mounted on the anchor strut standing from the base distribution anchor of the support base in a crossed state with the joint distribution anchor. Welding each through the secondary thread for use,

  The support base anchor strut, which was embedded and integrated with the expansion joint at the same time, with the back cast concrete that was cast from above into the boxed recess, was repeated for the assembly of a new expansion joint that was replaced during repair. It is maintained so that it can be used.

  In the independent claim 9, a pair of front leg plates that are set up in an opposing state across the gap between the road bridges,

  A pair of rear leg plates extending parallel to the front leg plate;

  By bridging each of the front leg plate and the rear leg plate, a plurality of substantially horizontal ceiling partition plates indicating the level of depth of the post-cast concrete scraping at the time of repair are arranged next to each other. As a framework lattice form where the mating mutual becomes a post-cast concrete distribution port,

A plurality of anchor posts are integrally raised from each ceiling partition plate,
Using a support base for an expansion joint, in which an elastic waterproof belt is attached to both front leg plates in a shielded state between the play,

  Such a support base is installed to the bottom of the boxing recess formed between the concrete floor slabs of the road bridge or between the concrete floor slab and the abutment so that the ceiling partition plate floats from the bottom of the boxing recess. ,

  For assembling the support base ceiling partition plate in a crossing manner with the ceiling partition plate from the bottom of the boxed recess to the existing embedded reinforcement and / or insertion reinforcement anchor that has been erected in advance. While welding each through the primary thread,

For the assembly of the existing joint distribution anchor provided by the expansion joint mounted on the support base to the anchor strut standing from the ceiling partition plate of the support base in a crossing state with the joint distribution anchor. Welding each through the secondary thread,
The support base anchor strut, which was embedded and integrated with the expansion joint at the same time, with the back cast concrete that was cast from above into the boxed recess, was repeated for the assembly of a new expansion joint that was replaced during repair. It is maintained so that it can be used.

  Further, according to the independent claim 11, the post-cast concrete scraping depth at the time of repairing is set up in a state of being opposed to each other across the gap between the road bridges as a substantially inverted L shape or a substantially T shape in side view that is the same or different from each other. A pair of front leg plates indicating levels;

  A pair of rear leg plates arranged in parallel with the front leg plate as substantially inverted L-shaped or substantially T-shaped in side view, which are also the same or different from each other;

  From the plurality of substantially vertical partition wall plates that connect the front leg plate and the rear leg plate, respectively, as a framework lattice form in which the adjacent ones of the partition wall plates are post-cast concrete distribution ports,

  A plurality of anchor posts are integrally raised from the substantially horizontal upper surfaces of the front leg plate and the rear leg plate,

  Using a support base for an expansion joint, in which an elastic waterproof belt is attached to both front leg plates in a shielded state between the play,

  Such a support base is placed between the concrete floor slabs of the road bridge or the bottom of the boxed recess formed in the concrete floor slab and the abutment, and the upper surface of the front leg plate and the rear leg plate floats from the bottom of the boxed recess. After installing in a state to

  For assembling the support base partition wall plate in an intersecting state with the partition wall plate from the bottom surface of the boxing recess to the existing embedded muscle and / or incision bar anchor that has been erected in advance. While welding each through the primary thread,

  The existing joint distribution anchor provided by the expansion joint itself mounted on the support base is horizontally mounted on the anchor strut standing from the front leg plate and rear leg plate of the support base in a crossing state with the joint distribution anchor. Welding each through a secondary thread for assembly,

  The support base anchor strut, which was embedded and integrated with the expansion joint at the same time, with the back cast concrete that was cast from above into the boxed recess, was repeated for the assembly of a new expansion joint that was replaced during repair. It is maintained so that it can be used.

  According to the structure of the independent claim 1, in addition to the front leg plate in which the support base for the expansion joint that can freely distribute the post-cast concrete is installed on the bottom surface of the boxing recess, it is embedded in the concrete floor slab or the abutment of the road bridge. It is equipped with a base distribution anchor that is assembled and welded to the bar and bar anchor, and an existing joint distribution anchor and an anchor column that is assembled and welded to the expansion joint itself, and is compatible with various conventional load-supporting expansion joints. It is a form that has versatility.

  Such a support base is installed and fixed in the inside of the unboxed recess prior to the insertion setting work of the expansion joint and the subsequent placement work of the post-cast concrete, and in an assembly and fixed state with the expansion joint mounted on the support base. Because the post-cast concrete that is cast from above into the boxed recess is embedded and integrated with the expansion joint and its support base at the same time, only expansion contractors can embed it efficiently. In addition, there is no possibility that the depth of the boxed recess and the size of the expansion joint do not match each other, and the support base has an effect of obtaining an embedded structure having a high load resistance strength of the expansion joint.

  In addition, since both the front leg plates of the support base are provided with an elastic water stop belt that shields the gap between the road bridges, in combination with the elastic sealing material and the rubber board provided in the expansion joint itself, There is an effect that the gap between the two can be kept in a superimposed water stop state.

  Also, when repairing an expansion joint newly installed in this way, the upper end of the front leg plate in the support base is used as a guideline for the depth level of the post-cast concrete scraping, and the post-cast concrete is ground shallowly from the road surface to this depth. It is sufficient to remove the existing expansion joint from the boxing recess and remove it.

  As a result, scraping of post-cast concrete can be done in a short time with light labor, and every time repair is performed, cracks occur in the concrete floor slab and abutment, causing damage to them and weakening them, and excessive scraping. There is no risk of the concrete floor slab falling off due to.

  In that case, the support base front leg plate that hangs from the bottom of the boxing recess functions as a weir wall for post-cast concrete. Therefore, the risk of falling of the ground concrete after being scraped off can be prevented by the elastic waterproof belts attached to both front leg plates.

  Furthermore, if the post-cast concrete is scraped to the post-cast concrete scraping depth level, the anchor struts standing up from the base distribution anchor of the support base will be exposed, and this will be embedded in the concrete slab and the abutment. As an alternative to muscles, it can be repeatedly assembled and used with a new joint joint anchor of a new expansion joint that is exchanged every repair. In this sense, it is excellent in durability and extremely convenient.

  After the assembly welding of the joint expansion anchor of the new expansion joint itself and the anchor base of the support base, the post-cast concrete for repair to be placed from above into the boxed recess is the support base. Due to the strong connection and integration of the buried concrete at the time of new construction and the jointed state on the rough surface, the expansion joint repeatedly receives severe vibrations and shocks from passing vehicles. There is no risk of delamination.

  On the other hand, according to the configurations of the independent claims 8 and 9 and the independent claim 11, in addition to achieving the effects of the independent claim 1, the expansion joint is placed on the upper surface of the support base for the expansion joint, and then the cast concrete It can be mounted more stably without fear of falling down to the gap before placing the cable, and there is also an effect of obtaining a high load resistance suitable for an expansion joint with a large expansion and contraction and a long bridge.

  The effects corresponding to the structure of the dependent claims are described in the best mode for carrying out the present invention, and will be apparent from the description.

  Hereinafter, a specific configuration of the present invention will be described in detail with reference to the drawings. First, a first embodiment of the present invention suitable for load-supporting expansion joints (A1), (A2), and (A3) with an expansion / contraction amount of up to about 300 mm is shown. 1 to 22, (G) is a substantially L-shaped facing side view across the gap (seam) (S) of the road bridge, and the concrete slabs (1) of the road bridges or the floor slabs (1 ) And an abutment (2), which are boxed recesses for embedment of expansion joints, and have an average depth (d1) of about 150 to 250 mm from the road surface of the paved asphalt (3).

  The bottom surface (4) of such a boxed recess (G) is a typical rough surface, and the existing embedded reinforcement (5) on the concrete floor slab (1) and the abutment (2) From the bottom surface (4) of the unboxing recess (G), it stands up in advance. Similarly, the embedded muscle (5) may protrude from the wall surface (6) of the unboxing recess (G). Further, when the embedded muscle (5) is insufficient, the piercing anchor (7) may be driven and used.

  In any case, when the expansion joints (A1), (A2), and (A3) are newly installed, the post-cast concrete (8) is placed from above into the boxed recess (G), and thereby the expansion joints (A1) (A2). ) (A3) is embedded and integrated.

  (B1) is a support base for an expansion joint that is installed in the inside of the boxed recess (G) prior to the placement of the cast concrete (8), and is in an opposing state sandwiching the clearance (S) of the road bridge. By being set up, a pair of front leg plates (9), which will indicate the post-cast concrete scraping depth level (LL) at the time of repair, and the play space (S) to both the front leg plates (9) The elastic waterproofing belt (10) attached in a shielded state and a plurality of base distribution forces integrally projected as an array distribution state at every required interval from both front leg plates (9) to the opposite backward direction. An anchor (11), and one or a plurality of anchor columns (12) standing upright and taller than the front leg plate (9) from each of the base distribution anchors (11), Out concrete (8) is configured so as to flow freely without hindrance to the bottom surface (4) of the box vent recess (G).

  Although the depth (d1) of the box opening recess (G) varies within the numerical range of about 150 to 250 mm in relation to the expansion joints (A1), (A2), and (A3), it is supported by the heel. The front leg plate (9) of the base (B1) only needs to have a constant height of about 40 to 60 mm, and the upper end portion of the front leg plate (9) is the level of the post-cast concrete scraping depth (L As a mark of -L), post-cast concrete (8) is scraped off from the road surface to such a depth (d2).

  The height (h) at which the anchor strut (12) stands taller than the front leg plate (9) from each of the base distribution anchors (11) is at least as low as the upper end of the front leg plate (9). It is preferable to set to about 30 mm.

  When the expansion joints (A1), (A2), and (A3) are newly installed, the support base (B1) is moved to the bottom surface (4) of the box opening recess (G), and both front leg plates (9) are as shown in FIG. As the corresponding positional relationship across the gap (S) between the road bridges, each of the base distribution anchors (11) is installed in a state where it floats up from the bottom surface (4) of the unboxing recess (G). The base distribution anchor (11) is placed on the concrete floor slab (1) or the abutment (2) in the crossed state with the base distribution anchor (11) to the embedded reinforcement (5) or the reinforced reinforcement anchor (7). Welding is performed at each intersection through a plurality of primary through-bars (13) for assembling to be assembled and integrated as a whole. It is also possible to additionally install a stationary connecting bar (not shown) between the primary thread (13) and the embedded bar (5).

  In the structure of the support base (B1) shown in FIGS. 1 to 4, each base force distribution anchor (11) is a steel plate (flat bar) separate from the front leg plate (9) and is moved to the upper position of the front leg plate (9). Although stud welding is performed in the form of an overhanging wing, it may be bent continuously and integrally from the upper position of the front leg plate (9).

  In the case of FIGS. 1 to 4, a plurality of anchor struts (12) made of reinforcing bars or screw rods are stud welded to the plate surface of each base force distribution anchor (11). 11) As a reinforcing bar instead of the steel plate, stud welding is performed to a mid-height position of the front leg plate (9) as shown in FIGS. 5 and 6, and one overhanging tip of each base distribution anchor (11) is provided. As the anchor strut (12), it is possible to bend and stand up continuously by a certain height (h) and to stand upright.

  In any case, an adjustment stand (14) composed of a reinforcing bar for stably setting the front leg plate (9) of the support base (B1) in a substantially vertical installation state is provided at the construction site. It is preferable to weld to the overhang | projection front-end | tip part of (11) as FIGS.

  Then, the base distribution anchor (11) can be maintained in a substantially horizontal installation state that floats from the bottom surface (4) of the boxing recess (G). Can also be effectively countered.

  However, when the base power distribution anchor (11) is made of a steel plate, the adjustment stand (14) is used as a screw rod instead of a reinforcing bar, and is implanted in the middle position of the base power distribution anchor (11) as shown in FIG. It may be preliminarily screwed and fastened to the state, and this may be operated up and down at the construction site. In order to quickly install in the horizontal installation state described above, it is also conceivable to lay leveling material (M) such as resin concrete, non-shrink mortar, cement mortar on the bottom surface (4) of the box opening recess (G).

  The front leg plate (9) of the support base (B1) shown in FIGS. 1 to 7 is made of a steel plate (flat bar), and a pair thereof facing each other has a substantially I-shape in the same side view. Then, separate pressing plates (15) are formed so that the upper both ends of the elastic waterstop belt (10) formed in the shape of a receiving hook are perpendicular to the front surface facing the play (S) side of both front leg plates (9). And detachably fixed via a plurality of screw fasteners (16). However, the upper both ends of the elastic water stop belt (10) may be clamped and fixed to the vertical rear surface facing the opposite boxing recess (G) of both front leg plates (9) by the same method. .

  Further, the front leg plate (9) is cut into an angle-shaped steel or H-shaped steel as shown in FIGS. 8 to 17 so that the opposed pair is the same or different from each other in a substantially inverted L shape or substantially T shape in side view. Modeling is also possible, and the expansion joints (A1), (A2), and (A3) can be stably received in a posture that does not incline illegally by the substantially horizontal upper surfaces of both front leg plates (9). .

  For the pair of front leg plates (9) made of such a shape steel material, as shown in FIGS. 8 to 10, the upper both ends of the elastic water-stop belt (10) are pushed to the vertical front or rear surface by pressing plates (15). 11), or the upper and lower ends of the elastic water-stop belt (10) are also sandwiched by the pressing plate (15) on the substantially horizontal upper surface or lower surface as shown in FIG. It can also be detachably fixed via a screw fastener (16).

  In particular, when sandwiched and fixed to the vertical rear surface and the substantially horizontal upper surface of both front leg plates (9), the upper ends of the elastic water-stop belt (10) are made of post-cast concrete ( 8) As a result of being pressed and adhered, the water stop effect of the play (S) on the road bridge is further improved.

  More specifically, the front leg plate (9) of the support base (B1) is shaped into a substantially L shape in a side view as shown in FIG. 12, and the lower end facing the play gap (S) of the road bridge is post-cast concrete. The damming cover (17) of (8) may be welded in an added state.

  Then, regardless of the shape of the front leg plate (9), the upper ends of the elastic water-stop belt (10) are attached to both front leg plates (9) with an adhesive as shown in FIGS. As shown in FIG. 15, the elastic waterproof belt (10) is bonded to the front leg plate (9) by an adhesive or vulcanized and bonded to the front leg plate (9). The other upper end of 10) can be detachably fixed to the other front leg plate (9) via a separate pressing plate (15) and a plurality of screw fasteners (16).

  In any case, the support base (B1) is inserted prior to the expansion and setting of the expansion joints (A1), (A2), and (A3) into the box opening recess (G) and the subsequent placement of the post-cast concrete (8). The elastic waterproof belt (10) can be easily attached to the support base (B1) without restriction because it is fixed to the bottom surface (4) of the unboxing recess (G). If a detachable mounting method is adopted, it is effective as a small and compact support base (B1) that is removed in advance and can be conveniently transported from the production factory to the construction site. ) Can also be exchanged.

  The elastic water stop belt (10) is formed in a curved shape from a thick rubber plate having a high durability and extends along the bridge width direction. This is the front leg plate of the support base (B1). The interior attached to (9) can be filled with sponge or other soundproofing / waterproofing material (18) from above at the construction site, and only the waterstopping material (18) can be replaced.

  If filled with such a soundproofing and water-stopping material (18), in combination with the elastic sealing material (described later) of the expansion joint (A1) (A2) itself and the rubber disk of the expansion joint (A3) itself, In addition to keeping the gap (S) of the road bridge in use in a superimposed water and soundproof state, there is a risk that pieces of post-cast concrete (8) that are scraped off during repair will fall from the gap (S) Can also be prevented.

  The expansion joints (A1), (A2), and (A3) are customarily having a constant unit length (L1) of about 1 to 1.8 m, but the support base (B1) and the elastic waterstop belt (10) are stretchable. As the unit length (L2) which is longer than the unit length (L1) of the joint (A1) (A2) (A3) and substantially corresponds to one lane (about 3 to 4 m) of the road bridge, its support base (B1) Adjacent to each other in the bridge width direction are joined together in a serial state and integrated. In addition, a separate elastic water stop pad (19) is formed on the joint (J) between the elastic water stop belts (10) as a constant length (X) of about 20 to 30 cm across the seam (J). By sealing and integrating into the polymerized state as shown in FIGS. 18 and 19 from above, the sealed state is maintained.

  Since the repair work of the expansion joints (A1), (A2), and (A3) having a certain unit length (L1) is performed on a lane basis for preventing traffic congestion, the support base (B1) Expansion joints (A1), (A2), and (A3) should be repaired based on the lane markings (not shown) of the lanes displayed on the road surface, with the joint (J) between the attached elastic waterproof belts (10). As a state in which the end portion (E) for one lane unit is shifted from the end portion (E) by a predetermined distance (D) in advance, the joint (J) between the elastic waterproofing belts (10) from the end portion (E) is formed. By setting the relationship so that it is always overhanging, replacement of the elastic waterproof pad (19) over the joint (J) can be performed without trouble by the operator from above at the construction site. The above expansion joint can be integrated after its adhesion A1) (A2) (A3 one lane units worth of), it is sufficient to continue replenishing construction to butt series state of the bridge width direction.

  Further, a rubber in which a large number of water passage holes (47) as shown in FIGS. 20 and 21 are distributed in the elastic water stop belt (10) of the support base (B1) having a constant unit length (L2). It is preferable to lay one or a plurality of porous pipes (P1) made of synthetic resin or synthetic resin and connect the porous pipes (P1) to each other when the support base (B1) is added.

  Then, during the years until the expansion joints (A1), (A2), and (A3) are repaired, due to peeling or breakage of the elastic seal material described later, water leakage from above or internal flooding Can be smoothly and reliably extracted and drained along the crossing slope of the road bridge to the drainage drain pipe (not shown) on the road shoulder by using a single perforated pipe (P1). This is because a durable water stop effect can be obtained.

  The expansion joints (A1), (A2), and (A3) mentioned above can be assembled and constructed from above without any trouble to the expansion joint support base (B1) as long as it is a load support type. it can.

  2, 4, 6, and 7 are a pair of opposed steel plate standing face plates (20) that meander in a corrugated shape in plan view, and a steel plate base plate that blocks only the alternating convex portions of the corrugated shape from below. (21), and an elastic meander (22) such as rubber or sponge is filled in the opposing meandering gap (W) facing the gap (S) of the road bridge, while both standing face plates (20 The expansion joint (A1) is shown in which a joint distribution anchor (23) made of a reinforcing bar or a steel plate is integrally projected from the opposite direction to the rear direction.

  The elastic sealing material (22) captures rainwater entering the meandering gap (W), earth and sand, tire wear pieces, pavement asphalt (3) peeling pieces, and other various fine solids falling from the passing vehicle. Thus, falling from the gap (S) of the road bridge is prevented.

  FIGS. 9 to 15 show a substantially inverted L-shape in a side view facing each other from a pair of upright faceplates (24) made of a steel plate and a horizontal steel plate top plate (25) cut out and separated into a wave shape in plan view. The elastic seal material (22) having the above-mentioned performance is filled (vulcanized and bonded) into the mutual gap that faces the gap (S) of the road bridge, while the two standing face plates (24) conflict with each other. The expansion joint (A2) is shown in which a joint distribution anchor (23) made of a reinforcing bar or a steel plate is integrally projected in the rear direction.

  Furthermore, FIG. 22 shows that the rubber disc (28) functioning as an elastic sealing material is covered with the whole core metal (26) for attachment and the intermediate metal core (27) for supporting the load therebetween. The expansion joint (A3) is shown in which the joint force distribution anchor (23) of the stud bolt is vulcanized and bonded, and the stud bolt joint distribution anchor (23) is integrally extended in the opposite backward direction. A fixing nut (29) is fastened to the stud bolt of the power distribution anchor (23) from above.

  Since such load-supporting expansion joints (A1), (A2), and (A3) each have an existing joint force distribution anchor (23), the above-mentioned box opening recess is used first. When assembling and constructing the expansion joint support base (B1) fixed to the bottom surface (4) of (G), the support base (B1) is viewed from above with reference to FIGS. , 22, the expansion joints (A1), (A2) and (A3) are mounted, and the anchor strut (23) stands up from the base distribution anchor (11) of the support base (B1) ( 12) may be welded to each other through a plurality of secondary reinforcing bars (30) for assembling in a crossing manner with the joint distribution anchor (23).

  Then, after the expansion joints (A1), (A2), and (A3) and their support bases (B1) are assembled and integrated by welding at the respective intersections, the boxed recess (G) is introduced into the interior from above. Post-cast concrete (8) is placed, and then the post-cast concrete (8) flows to every corner including the bottom surface (4) of the unboxing recess (G), and the expansion joint (A1) ( A2) (A3) and its support base (B1) are embedded and integrated at once.

  In that case, in the expansion joint (A1) in which the standing face plate (20) as shown in FIG. 2 is bent into a wave shape, the post-cast concrete (8) is also formed on the convex portion that projects over the gap (S) of the road bridge. , The joint distribution anchor (23) is directly butt welded to the anchor strut (12) at the corresponding position of the support base (B1) as shown in FIG. Alternatively, as shown in FIG. 17, a suspension bar (not shown) is used when the expansion joint (A1) is inserted and set into the unboxing recess (G) by being assembled and welded via a separate covering bar (31). It is desirable to prevent the possibility of falling to the forward sloping state of the play (S) until the post-cast concrete (8) is placed after it is detached from the former and separated.

  In addition, as for the expansion joint (A3) composed of the rubber disk (28) as shown in FIG. 22, a foamed polystyrene or other back-up concrete weir backup material (not shown) is inserted into the gap (S) of the road bridge. After being installed, the cast concrete (8) is then placed in the boxed recess (G), and the backup material is removed after curing and hardening. It is preferable to weld a covering line (31) from above to the secondary thread (30).

  In any case, the installation of the support base (B1) and the new installation of the expansion joints (A1), (A2), and (A3) can be performed only by the contractor of the expansion joints (A1) (A2) (A3). Therefore, there is a possibility that the depth (d1) of the above-mentioned box opening recess (G) and the size of the expansion joints (A1), (A2), and (A3) to be inserted and set therein will not be matched. The correct expansion joints (A1), (A2), and (A3) can be efficiently constructed.

  Further, when repairing the expansion joints (A1), (A2), and (A3), the cast concrete (8) is then scraped off from the road surface by a concrete breaker, and the upper ends of both front leg plates (9) in the support base (B1). It is scraped off to the level of the punching depth (LL) where the part is exposed, and the joint distribution anchor (23) of the expansion joints (A1), (A2), (A3) and the secondary thread ( 30) is appropriately cut with a reinforcing bar cutter or the like, and the existing expansion joints (A1), (A2), and (A3) are taken out from the box opening recess (G) and removed.

  Then, as is clear from FIG. 3 corresponding to FIG. 2, the anchor strut (12) standing up from the base force distribution anchor (11) of the support base (B1) is then subjected to the cast-up concrete scraping depth. Since the fixed height (h) is exposed from the level (L-L), the new expansion joints (A1) (A2) (in which the anchor strut (12) of the support base (B1) can be replaced. A3) is used for assembling, welding is performed in the same way as the previous installation, and the second post-cast concrete (8a) may be placed as shown in FIG. Is repeated for each repair.

  That is, the anchor strut (12) standing up from the base distribution anchor (11) of the support base (B1) that is preliminarily installed and fixed to the bottom surface (4) of the unboxing recess (G) is a concrete floor. Because it functions as an existing embedded reinforcement (5) on the plate (1) and the abutment (2), it is necessary to replace the expansion joints (A1), (A2), and (A3) every time the newly-installed concrete (8 ) To the bottom (4) of the unboxing recess (G), and it is not necessary to drive the anchor anchor (7) specially. As a result, the concrete floor slab (1) and the abutment (2 ) Cracks, which may damage and weaken them, or even cause an accidental dropout of the concrete slab (1) due to excessive scraping.

  If the depth (d1) of the boxed recess (G) is constant, the front leg plate (9) of the support base (B1) preliminarily installed on the bottom surface (4) has a constant height ( It will be sufficient if the post-cast concrete (8) is scraped shallowly to the extent that it has about 40 to 60 mm), and the repair work of the expansion joints (A1), (A2), and (A3) can be done with relatively little effort. The generation of vibration, noise, and dust is also suppressed.

  In this regard, when the concrete floor slab (1) is particularly thick, for example, about 300 mm, the depth (d1) of the box opening recess (G) may be cut out deeply. There is no change in achieving the effect.

  Post-cast concrete (8) in which the support base (B1) is embedded at the time of new construction, and post-cast concrete (8a) to be placed for each repair of the expansion joints (A1) (A2) (A3) As a result of being transferred through an at-random rough surface by a breaker, a smooth peeling interface is not generated, and the binding force is further strengthened.

  In addition, since both front leg plates (9) of the support base (B1) are installed on the bottom surface (4) of the box opening recess (G) as a corresponding positional relationship across the gap (S) of the road bridge, It functions as a damming wall for post-cast concrete (8) to be placed in the boxed recess (G).

  As a result, there is no risk of a corner gap on the play (S) side of the concrete floor slab (1) or the abutment (2) being accidentally removed when the cast concrete (8) is scraped off, and the front leg plate (9) Is useful as a cover for preventing corner breakage. In addition, since the elastic water-stop belt (10) is attached to both front leg plates (9) of the support base (B1), the pieces of post-cast concrete (8) scraped off at the time of repairing are separated from the gap (S ) There is no risk of falling.

  Next, FIGS. 23 to 25 show a second embodiment of the present invention, in which a large load-supporting expansion joint (A1) (A2) (A3) with an expansion amount of about 300 mm or more, or a long bridge is used. The support base (B2) is configured as follows in order to stably receive it in a posture state that does not incline and increase the load bearing strength.

  That is, the expansion joint support base (B2) for that purpose also extends in parallel with the pair of front leg plates (32) which are set up in an opposing state across the gap (S) of the road bridge, and the front leg plates (32). By bridging the rear leg plate (33) and the front leg plate (32) and the rear leg plate (33) respectively, the post-cast concrete scraping depth level (L-L) at the time of repair is set. From the substantially horizontal ceiling plate (34) to be shown, it is created in a side-view gate shape that bends in series.

  In addition, a plurality of post-cast concrete distribution ports (35) are notched and distributed in each ceiling plate (34), and the portion that remains relatively to the notch is substantially horizontal on the support base (B2). It functions as a base power distribution anchor (36). (37) is a plurality of anchor columns that stand integrally from the ceiling plate (34) to be the respective base distribution anchors (36), and are stud welded as reinforcing bars or screw rods. Alternatively, the post-cast concrete dowel (38) may be stud welded to the ceiling plate (34), or the post-cast concrete dowel (39) may be stud welded to the rear leg plate (33).

  In addition, an elastic water stop belt (10), which also has a receiving hook shape, is attached to both front leg plates (32) of the support base (B2) so as to shield the gap (S) between the road bridges. Furthermore, the elastic water-stop belt (10) is substantially the same as the first embodiment, and the first embodiment shown in FIGS. Various types of can be adopted.

  The support base (B2) of the second embodiment is also installed on the bottom surface (4) of the boxing recess (G) as in the first embodiment. The base distribution anchor (36) consisting of the ceiling plate (34) is kept floating from the bottom surface (4) of the unboxing recess (G). The post-cast concrete (8) cast from above passes freely through the post-cast concrete distribution port (35) of the ceiling plate (34) to the bottom surface (4) of the unboxing recess (G) without any trouble. To do.

  In that case, as shown in FIG. 25, the rear leg plate (33) of the support base (B2) is intentionally drooped shallower than the front leg plate (32), and the middle ceiling plate of the support base (B2) ( It is preferable to weld an adjustment stand (40) made of reinforcing bars and steel plate pieces for installing 34) in a substantially horizontal installation state to the rear leg plate (33) in a distributed state at a required interval at the construction site.

  Then, since the plurality of adjustment stands (40) are in point contact with the bottom surface (4) of the boxing recess (G), the above support is provided even when the bottom surface (4) forms a rough surface with severe irregularities. The base (B2) can be easily installed in a substantially horizontal installation state, and the anchor strut (37) can be properly suspended. Even if the lower end portion of the rear leg plate (33) is grounded in a sawtooth shape, such an effect can be expected.

  Therefore, the base distribution anchor (36) of the support base (B2) installed inside the boxing recess (G) is the same as that of the first embodiment in the concrete floor slab (1) or the abutment (2 ) To the existing embedded muscle (5) and the pierced bar anchor (7) via a plurality of primary primary muscles (13) for assembling in a cross state with the base distribution anchor (36). Then, welding is performed at each intersection, and the assembly is fixed as a whole.

  Then, the expansion joints (A1), (A2), and (A3) at the time of the new installation are mounted on the support base (B2), and the existing joint arrangements that the expansion joints (A1), (A2), and (A3) themselves are equipped with. A plurality of secondary through-struts for assembly that cross the force anchor (23) in a crossed state with the joint force distribution anchor (23) from the base power distribution anchor (36) to the anchor strut (37) standing upright. (30), and by assembling and integrating by welding at the respective intersections, and finally placing the post-cast concrete (8) from above into the inside of the boxed recess (G), the expansion joint (A1 ) (A2) (A3) and its supporting base (B2) are buried at the same time.

  However, when the amount of expansion and contraction is extremely large, first, only the support base for expansion joint (B2) is embedded in the inside of the boxed recess (G) by placing the necessary post-cast concrete (8), By continuing the post-cast concrete (8a) after curing and hardening, the expansion joints (A1), (A2), and (A3) may be embedded in the boxed recess (G). It is also possible to divide the work in parts.

  Further, the repair work for exchanging the expansion joints (A1), (A2), and (A3) can be performed in the same manner as in the first embodiment, and the support embedded in the unboxing recess (G). Using the ceiling plate (34) of the base (B2) as a guide for the post-cast concrete scraping depth level (LL), the post-cast concrete (8) is scraped shallowly from the road surface to this depth, and the existing expansion joint (A1), (A2), and (A3) may be removed from the box opening recess (G).

  Then, since the anchor column (37) of the support base (B2) stands up in an exposed state from the ceiling plate (34) by a certain height (h), it is replaced every time it is repaired. Can be used repeatedly for assembling the flexible expansion joints (A1), (A2), and (A3), and there is a risk that the concrete floor slab (1) and the abutment (2) of the road bridge will be damaged and weakened at every repair. Absent.

  Even if the anchor strut (37) is deformed or damaged during the scooping-up of the post-cast concrete (8), the above support is provided in the same manner as the base force anchor (11) made of the steel plate of the first embodiment. A new anchor post (37) can be additionally stud welded to the ceiling plate (34) of the base (B2) at the construction site. In addition, since the other structure and construction method in 2nd Embodiment are substantially the same as previous 1st Embodiment, only the corresponding code | symbol with FIGS. 1-22 is entered in the FIGS. 23-25.

  In the second embodiment of the present invention shown in FIGS. 23 to 25, the expansion joint support base (B2) is formed in a gate shape in a side view that is bent in series by notching the channel-shaped steel material. As apparent from the third embodiment shown in FIGS. 26 to 28 as an alternative, the support base (B3) is also a pair of front leg plates (32) that are set up in an opposing state with a gap (S) between the road bridges therebetween. And a pair of rear leg plates (33) extending in parallel with each other, and the front leg plate (32) and the rear leg plate (33) are bridged to each other, thereby providing post-cast concrete for repair. From a plurality of substantially horizontal ceiling partition plates (34a) that indicate the depth of the scraping depth (LL), the adjacent ones of the ceiling partition plates (34a) are post-cast concrete distribution ports (35 ) And formed by framework lattice form, or may be integrally to upright a plurality of anchor posts (37) from the respective ceiling partition plate (34a).

  In other words, a plurality of ceiling partition plates (34a) instead of the ceiling plate (34) of the second embodiment, and a separate steel plate (flat bar) for rolling the front leg plate (32) and the rear leg plate (33), The frame is integrated into a gate shape in side view by welding, and the ceiling partition plate (34a) functions as a base power distribution anchor (36).

  In addition, since the other construction in the support base (B3) and the construction method to be performed at the time of newly installing and repairing the expansion joints (A1), (A2), and (A3) are substantially the same as those in the second embodiment. 26 to 28, the corresponding reference numerals to those in FIGS. 23 to 25 are entered, and the detailed description thereof is omitted.

  29 to 33 show a fourth embodiment of the present invention. In this case, the expansion joints (A1), (A2) and (A3) having a large expansion / contraction amount, and a support base (B4) for catching it for a long bridge are shown. And a pair of front leg plates (32) that indicate the post-cast concrete scraping depth level (L-L) at the time of repair by being installed in a facing state across the gap (S) of the road bridge A pair of rear leg plates (33) extending in parallel with the front leg plate (32), and a plurality of substantially vertical links respectively connecting the front leg plate (32) and the rear leg plate (33). From the partition wall plate (34b), the partition wall plates (34b) adjacent to each other are framed in a lattice form to be a post-cast concrete distribution port (35b), and the front leg plate (32) and the rear leg From substantially horizontal upper surfaces of the rate (33), each plurality of anchor posts (37) are erected integrally.

  That is, a plurality of vertical partition wall plates (34b) instead of the substantially horizontal ceiling partition plate (34a) of the third embodiment, and the front leg plate (32) and the rear leg plate (33) are separated separately. As a cut processed product of a steel plate (flat bar) and angle-shaped steel or H-shaped steel, the framework is integrated into a lattice form in which post-cast concrete (8) can be freely distributed by welding.

  Moreover, the pair of front leg plates (32) are not only juxtaposed in the front-rear symmetrical state as substantially inverted L-shaped or substantially T-shaped in the same side view, but are also substantially inverted L-shaped or substantially in the different side view. As a T-shape, it may be juxtaposed in an asymmetrical state.

  Further, the pair of rear leg plates (33) are also substantially inverted L-shaped or substantially T-shaped in the same side view, and are not only juxtaposed in a front-rear symmetrical state, but also substantially inverted L-shaped or substantially in the different side view. As a T-shape, it may be juxtaposed in an asymmetrical state.

  Therefore, the expansion joints (A1), (A2), and (A3) are tilted forward and inclined by the horizontal upper surface of the front leg plate (32) and the substantially horizontal upper surface of the rear leg plate (33) in the support base (B4). In addition to being able to be received in a stable manner without fear, the elastic water-stop belt (10) can be placed on the vertical front surface of both front leg plates (32) or the substantially horizontal upper surface based on FIGS. 1 to 17 of the first embodiment. The various attachment methods described can be used to fix them in an attached state or detachably.

  Then, such a support base (B4) is also moved into the inside of the boxing recess (G), and the upper surface of the front leg plate (32) and the rear leg plate (33) is the bottom surface of the boxing recess (G) ( 4) Installed in the almost horizontal installation state that floated from 4), the partition wall plate (34b) of the support base (B4) was placed on the concrete floor slab (1) or the abutment (2) with the existing embedded reinforcement (5) Welding at each intersection is carried out to the muscle anchor (7) via a plurality of primary through-bars (13) for assembly which are laid in a crossing manner with the partition wall plate (34b). Assemble and integrate.

  In that case, since the partition wall plate (34b) of the support base (B4) is in a vertical state, the upper end portion thereof is cut out as a primary thread receiving seat (41) as shown in FIGS. The primary thread (13) is mounted stably, and the primary thread receiving hole (42) as shown in FIGS. 30 to 33 is cut out on the plate surface of the partition wall plate (34b). A primary thread (13) may be inserted into and passed through.

  Thereafter, the joint force distribution anchor (23) of the expansion joints (A1), (A2) and (A3) itself mounted on the support base (B4) is attached to the front leg plate (32) and the rear leg plate (33) of the support base (B4). ) To the anchor strut (37) standing up from each other via a plurality of secondary through-bars (30) for assembly, and finally into the inside of the boxed recess (G) from the top of the post-cast concrete ( 8) and placing the supporting base (B4) and the expansion joints (A1), (A2), and (A3) supported by the supporting base (B4) at the same time, or divided into two times before and after, The construction method performed when repairing the expansion joints (A1), (A2), and (A3) is the same as in the second and third embodiments.

  Since the other configurations relating to the support base (B4) of the fourth embodiment are substantially the same as those of the second and third embodiments, the corresponding reference numerals to FIGS. 23 to 28 are entered in FIGS. However, in any of the second to fourth embodiments, in order to further improve the load-bearing strength, the box opening recess is removed from the rear leg plate (33) of the support base (B2) (B3) (B4). To the wall surface (6) of (G), a plurality of base force anchors (43) made of separate reinforcing bars or steel plates as shown in FIGS. The anchor strut (44) is continuously bent from the protruding tip of the force anchor (43).

  Then, each of the anchor struts (44) is extended from the wall surface (6) of the unboxing recess (G) to the existing embedded anchor (5) or incisor anchor (7) projecting inward in advance. It is preferable that welding is performed at each intersection point through another primary thread (45) for assembly that is laid in a crossed state with the force anchor (43), and it is also preferable that the assembly is integrated in a superimposed manner. .

  A load-supporting expansion joint (A1) in which the standing face plate (20) is bent in a wave shape, and a load-supporting expansion joint (A2) in which the top plate (25) is cut out in a wave shape and separated. As is apparent from FIGS. 34 to 36 showing the modified embodiments of the two types, the substantially water-receptive elastic water stop film (46) is formed at the lower end portions of the standing face plates (20) and (24). There are also conventional products that are each attached as a state of hanging in advance.

  In the case of such a configuration, one or a plurality of rubber or synthetic resin porous pipes (P2) in which a large number of water flow holes (47) are distributed are also attached to the elastic water blocking membrane (46). When laying inside and adding the expansion joints (A1) and (A2) in the butt-series in the bridge width direction, it is desirable to insert the porous pipes (P2) into a continuous state and integrate them.

  Then, during the years until the expansion joints (A1) and (A2) are repaired, the elastic sealing material (22) is leaked from the upper side or the internal flaw due to aging, peeling, or damage. Even if water is generated, it can be reliably drained and drained to the drainage drain pipe on the shoulder along the crossing gradient of the road bridge by the porous pipe (P2).

  In particular, the expansion joints (A1) and (A2) are attached to the perforated pipe (P2) and the expansion joint support bases (B1), (B2), (B3), and (B4) on the elastic water stop film (46). If the separate perforated pipes (P1) are installed in parallel on the elastic waterstop belt (10) as shown in FIGS. 35 and 36, the drainage effect can be achieved in a superimposed manner, and the durability is improved. It will also improve. In that case, it is most effective to fill the space between the upper and lower surfaces of the elastic water-stop film (46) and the elastic water-stop belt (10) with the above-mentioned sound-proof and water-proof material (18) such as sponge. It is.

  The three types of load-supporting expansion joints (A1), (A2) and (A3) themselves are conventional products, and any of them is the support base (B1) (B2) (B3) (B4) of the first to fourth embodiments. As described above, it can be assembled and integrated without any trouble from above, and it can be embedded in the inside of the boxed recess (G) by placing the subsequent cast concrete (8). As an expansion joint (A4) for an extremely large long-span bridge of about 400 to 600 mm, the following new configuration is adopted, and the support bases (B2), (B3), and (B4) of the second to fourth embodiments are adopted. It is preferable to assemble and integrate.

  That is, the load-supporting expansion joint (A4) for the long bridge to be mounted on the support bases (B2), (B3), and (B4) of the second to fourth embodiments is shown in FIGS. ) (B3) (B4) A pair of post-concrete concrete weir plates (48) suspending at a position substantially corresponding to the front leg plate (32), and from the both weir plates (48) to the opposite backward direction A plurality of distribution anchor plates (49) projecting integrally as an array distribution state at every required interval, and a uniform distribution as an array distribution state at every necessary interval from both damming plates (48) in the opposite direction. The plurality of finger plates (50) that define alternating comb-shaped meandering gaps (W) in plan view on the play gap (S) of the road bridge, and the finger plates (50) Elastic sealing material filled in a meandering gap adjacent (W) (51) and those provided with.

  More specifically, the post-cast concrete weir plate (48) is made of a steel plate having a thickness of about 15 to 20 mm, and its lower end is in contact with the upper surfaces of the support bases (B2) (B3) (B4). Will be suspended.

  On the other hand, the finger plate (50) projecting above the play gap (S) of the road bridge and the distribution anchor plate (49) projecting in the opposite direction to the box opening recess (G) are approximately 30- It consists of a continuous sheet of steel with a thickness of 35 mm or a continuous integral cast iron, and the said weir plate (48) is said to be cut-and-divided in an orthogonal state along the direction of the bridge axis by a certain length of about 770 to 1070 mm. Extend. Needless to say, the orthogonal portions are welded.

  Moreover, the left-right mutual space | interval which the said finger plates (50) adjoin, and the adjacent left-right mutual space | interval of the said power distribution anchor plates (49) are set to about 80-90 mm. As the elastic sealing material (51), it is desirable to employ room temperature vulcanization type liquid rubber, and vulcanize and cure at room temperature after filling the meandering gap (W).

  (52) is a front-falling inclined surface formed on the upper end end of the overhanging tip of the finger plate (50) so as not to hinder the traveling of the passing vehicle and snow removal work, and (53) is also formed on the lower end end. The front rising slope surface (54) is an anti-slip recess for a passing vehicle, which is also provided on the top end (road surface) of the finger plate (50). Such a striped steel plate (55) may be welded to the top end face of the finger plate (50), and the unevenness (56) of the striped steel plate (55) may be made to function as a slip-preventing vehicle.

  According to this, since the finger plate (50) has a T-shaped cross section with a striped steel plate (55) as a crown, the finger plate (50) protrudes in the horizontal direction. It can be ensured, and there is an effect capable of suppressing the fall of the obstacle and the reverse protrusion of the elastic sealing material (51).

  On the other hand, the upper end end of the distribution anchor plate (49) projecting from the post-cast concrete weir plate (48) to the boxing recess (G) in the back is used as a secondary thread receiving seat (57). It is notched, and a plurality of secondary thread lines (30) are laid across in a crossed state.

  However, a secondary thread receiving hole (58) in place of such a receiving seat (57) is cut out on the plate surface of the distribution anchor plate (49), and a plurality of secondary thread is provided there. (30) may be inserted and penetrated.

  Further, the protruding tip portions of the force distribution anchor plate (49) are connected and integrated by means of a space regulating bar (59) that intersects the force distribution anchor plate (49). Is preferably regulated as a constant value shown above.

  And, such a load-supporting expansion joint (A4) for a long bridge is also preliminarily installed and fixed to the bottom surface (4) of the boxing recess (G) according to the second to fourth embodiments. Anchor struts (37) mounted on the support bases (B2) (B3) (B4) from above and standing up from the support bases (B2) (B3) (B4). The support bases (B2) (B3) are made by post-cast concrete (8) which is assembled and integrated by welding at each intersection through a plurality of secondary through bars (30) for assembly, and subsequently placed from above. ) (B4) and the expansion joint (A4) held thereby are buried in the boxed recess (G) at the same time or divided into two times before and after.

  In this case, the expansion joint (A4) for the long bridge is an extremely long large product as described above. Therefore, as shown particularly in FIGS. The upper end butt face is cut out as a receiving groove (60) for the rocking prevention bar, and the rocking prevention bar (61) for the expansion joint is horizontally mounted in the crossed state.

  Then, the anchor column (37) rising from the support bases (B2), (B3), and (B4) is used as a screw rod, and the anti-swing bar (61) is inserted into the screw rod from above, and then the fixing nut (62 ) Is detachably fastened, and the rocking prevention bar (61) is preferably pressed and integrated.

  Then, before placing the post-cast concrete (8), there is a risk that the expansion joint (A4) may fall into a forward-declining slope with the post-cast concrete weir plate (48) as a pivot point. The rocking prevention bar (61) can be effectively prevented, and an extremely stable and strong assembly state can be obtained.

  In addition, since the construction method at the time of newly installing and repairing in such an expansion joint (A4) for long bridges is substantially the same as the second to fourth embodiments, FIGS. Only the corresponding reference numerals to 33 are entered, and detailed description thereof is omitted. Even in this case, the anchor strut (37) of the expansion joint support base (B2), (B3), (B4) can be used repeatedly for assembling the new expansion bridge expansion joint (A4).

  Further, FIGS. 41 and 42 show a modified embodiment of the expansion joint (A4) for the long bridge. In this case, the finger plate (50) of the expansion joint (A4) has an enclosure made of a thinner steel plate. The plate (63) and the bottom plate (64) are attached and welded to form a framework in a substantially rectangular shape in a plan view as a whole with the damming plate for post-cast concrete (48).

  In this case, as shown in FIG. 41, the surrounding plate (63) may be bent continuously as a steel plate having the same thickness as the post-cast concrete weir plate (48). In the formed frame, resin concrete, non-shrink mortar, cement mortar, and other various fillers (65) whose aggregate particle size is finer than that of post-cast concrete (8) are placed from above. (66) is a giver that gives up the biting force with the filler (65).

  Then, the load bearing strength required for the expansion joint for long bridges (A4) can be further improved, and the various fillings (65) can be easily and quickly placed at the production plant or construction site. .

  The expansion joint (A4) in FIGS. 37 to 42 is used for a straight bridge, and its finger plate (50) and the weir plate (48) are framed in a substantially rectangular shape orthogonal to each other in plan view. By using the same welding method for an alternative cable bridge, the finger plate (50) and the weir plate (48) intersect each other while maintaining the skew angle (θ) of the cable bridge as shown in FIG. It is also possible to form a framework into a shape and to place the various fillers (65) in the framework.

  According to such an expansion joint (A4) for a sloping bridge, in combination with the T-shaped cross section of the finger plate (50), when the finger plate (50) expands and contracts due to temperature changes, There is an effect of not generating a wide gap in which the motorcycle is removed, and the load resistance can be improved.

  In addition, since the other structure in the said modification embodiment is substantially the same as the expansion joint (A4) for long-span bridges shown in FIGS. 37-40, the corresponding code | symbol with FIGS. 37-40 is attached to the FIGS. Just fill it in and omit the detailed explanation.

It is a perspective view which shows the installation state of the support base for expansion joints concerning 1st Embodiment of this invention. It is sectional drawing which shows the embedment (new installation) construction state of the expansion joint with respect to FIG. FIG. 3 is a cross-sectional view of a state in which post-cast concrete is scraped off from FIG. 2 and an expansion joint is removed. FIG. 4 is a cross-sectional view of a state in which a new expansion joint from FIG. 3 is assembled and integrated into a support base, and post-cast concrete is placed. It is a slope view corresponding to FIG. 1 which shows the modification of a support base. It is a slope view which shows another modification of a support base. It is sectional drawing which shows the adjustment stand different from FIG. It is a perspective view corresponding to FIG. 1 which shows the support base which consists of a front leg plate of a shape steel material. It is sectional drawing which shows the attachment state of the elastic water stop belt with respect to the front leg plate of a support base. It is sectional drawing which shows another attachment state of an elastic water stop belt. It is a half notched cross-sectional view which shows another attachment state of an elastic water stop belt. It is a half notched cross-sectional view of a state where a damming cover for post-cast concrete is added to the front leg plate of the support base. It is sectional drawing of the state which adhered the elastic water stop belt to the front leg plate of the support base. It is sectional drawing which shows the construction state of the support base with respect to the inclined bottom face of a boxing recess. It is sectional drawing which shows the base distribution anchor bent from the middle part of the support base. It is sectional drawing which shows the state by which the base distribution anchor of the support base and the joint distribution anchor of the expansion joint were directly butted and welded between the front-end | tip parts. Similarly, it is sectional drawing which shows the state where the base distribution anchor of the support base and the joint distribution anchor of the expansion joint were welded via separate covering bars. It is sectional drawing which shows the adhesion state of the elastic water stop pad with respect to the joint of elastic water stop belts. It is an expanded sectional view which follows the 19-19 line | wire of FIG. It is sectional drawing corresponding to FIG. 18 which shows the state which laid the porous pipe for drainage inside the elastic water stop belt. It is an expanded sectional view which follows the 21-21 line of FIG. It is a slope view which shows the construction state of this invention applied to the expansion joint which consists of rubber boards. It is a perspective view which shows the assembly state of the support base which concerns on 2nd Embodiment of this invention, and the expansion joint with respect to this. It is sectional drawing of FIG. It is sectional drawing which shows the attachment state of the adjustment stand with respect to the rear leg plate of a support base. It is a perspective view which shows the installation state of the support base which concerns on 3rd Embodiment of this invention. It is sectional drawing which shows the embedment construction state of the expansion joint with respect to the support base of FIG. It is sectional drawing which shows the attachment state of the adjustment stand with respect to the rear leg plate of a support base. It is a perspective view which shows the installation state of the support base which concerns on 4th Embodiment of this invention. FIG. 30 is a perspective view showing a modified embodiment of FIG. 29. FIG. 31 is a half-broken cross-sectional view showing a state in which the expansion joint is embedded in the support base of FIG. 30. It is sectional drawing of the embedment construction state which assembled and integrated the support base also to the wall surface of the boxing recess. It is sectional drawing which shows the attachment state of the elastic waterproofing belt different from FIG. It is sectional drawing corresponding to FIG. 20 which shows the state which laid the separate porous pipe for drainage inside the elastic water stop film which an expansion joint comprises. It is an expanded sectional view which follows the 35-35 line | wire of FIG. It is sectional drawing of the modification applied to the expansion joint different from FIG. It is a slope view which shows the load construction type expansion joint suitable for long bridges, and the burial construction state assembled and integrated with the support base of the second embodiment. It is the elements on larger scale which extract and show the modification of the finger plate in the expansion joint of FIG. It is a perspective view which shows the deformation | transformation embodiment of FIG. FIG. 40 is a cross-sectional view of FIG. 39. FIG. 38 is a perspective view showing another modified embodiment of FIG. 37. It is sectional drawing of FIG. It is a plane schematic diagram which shows the expansion joint for inclined bridges corresponding to FIG.

Explanation of symbols

(1) ・ Concrete floor slab (2) ・ Abutment (4) ・ Bottom surface (5) ・ Embedded reinforcement (6) ・ Wall surface (7) ・ Incision anchor (8) (8a) ・ Post-cast concrete (9) (32 ) · Front leg plate (10) · Elastic waterproof belt (11) (36) (43) · Base force distribution anchor (12) (37) (44) · Anchor strut (13) (45) · Primary thread ( 14) (40) ・ Adjustment stand (15) ・ Pressing plate (16) ・ Screw fastener (17) ・ Weak cover for post-cast concrete (18) ・ Waterproof material for soundproofing (19) ・ Elastic waterstop pad ( 20) (24)-Standing face plate (21)-Base plate (22) (51)-Elastic seal material (23)-Joint force distribution anchor (25)-Top plate (26)-Both ends core metal (27)-Intermediate Core (28) / Rubber board (29) ・ Fixing nut (30) ・ Secondary thread (33) ・ Rear leg plate (34) ・ Ceiling plate (34a) ・ Ceiling partition plate (34b) ・ Partition wall plate (35) (35a) (35b)・ Post-cast concrete distribution port (38) (39) (66) ・ Giber (41) (57) ・ Reinforcement seat (42) (58) ・ Reinforcing hole (46) ・ Resilient water barrier film (47)・ Water flow hole (48) ・ Weir plate for post-cast concrete (49) ・ Power distribution anchor plate (50) ・ Finger plate (54) ・ Concavity (56) ・ Unevenness of striped steel plate (59) ・ Spacing restriction bar (60) ・ Receiving groove for swing prevention bar (61) ・ Swing prevention bar for expansion joint (62) ・ Fixing nut (63) ・ Enclosure plate (64) ・ Bottom plate (65) ・ Filled material (A1) (A2) (A3) (A4)-Expansion joint (B1) (B2) (B3) (B4)-Expansion joint support base (G)-Box opening recess (P1) (P2)-Perforated pipe for drainage (S)- Yuma (Seam)
(W) • Meander gap (θ) • Skew angle of the inclined bridge (d1) • Depth of boxing recess (d2) • Drilling depth of post-cast concrete (h) • Standing height of anchor strut (L -L) ・ Decrease depth level of post-cast concrete

Claims (27)

A pair of front leg plates (9) showing a post-cast concrete scraping depth level (L-L) at the time of repair by being set up in a facing state across the gap (S) of the road bridge,
An elastic water stop belt (10) attached to the front leg plates (9) in a shielded state of the gap (S);
Similarly, a plurality of base force distribution anchors (11) integrally projecting from both front leg plates (9) in a rearward direction opposite to each other as an array distribution state at a required interval;
Free flow of post-cast concrete (8) comprising one or a plurality of anchor columns (12) standing upright from the respective base distribution anchors (11) and taller than the front leg plate (9). Using the expansion joint support base (B1)
Such a support base (B1) is placed between the concrete floor slabs (1) of the road bridge or the bottom surface (4) of the boxed recess (G) formed in the concrete floor slab (1) and the abutment (2). After installing the base distribution anchor (11) so that it floats from the bottom surface (4) of the unboxing recess (G),
The existing embedded muscle (5) and / or the pierced bar anchor (5) and / or the piercing anchor anchor (11) of the support base (B1) which is erected in advance from the bottom surface (4) of the boxing recess (G). 7), each of which is welded via an assembly primary thread (13) that lies in a cross with the base distribution anchor (11),
The existing joint force distribution anchor (23) included in the expansion joints (A1) (A2) (A3) itself mounted on the support base (B1) is removed from the base force anchor (11) of the support base (B1). Welding each of the standing anchor struts (12) via secondary assembly bars (30) for assembly that crosses the joint power distribution anchor (23).
Anchor struts of the support base (B1), which are embedded and integrated with the expansion joints (A1), (A2), and (A3) at the same time by post-cast concrete (8) cast from above into the boxed recess (G). An embedded structure of an expansion joint in a road bridge, characterized in that (12) is maintained so that it can be used repeatedly for assembling new expansion joints (A1), (A2), and (A3) to be replaced at the time of repair.   An adjustment stand (14) for setting the front leg plate (9) in a substantially vertical installation state on the base distribution anchor (11) protruding from the front leg plate (9) of the expansion joint support base (B1) The embedded structure of the expansion joint in the road bridge according to claim 1, wherein: While the base distribution anchor (11) of the expansion joint support base (B1) is a reinforcing bar or steel plate, it is stud welded to the front leg plate (9),
2. The expansion joint embedded structure for a road bridge according to claim 1, wherein the projecting tip of the base distribution anchor (11) is bent and raised continuously as an anchor post (12). As a steel plate in which the base distribution anchor (11) of the expansion joint support base (B1) is continuously bent from the front leg plate (9) or stud-welded to the front leg plate (9),
2. An expansion joint embedded structure for a road bridge according to claim 1, wherein an anchor support (12) made of a screw rod or a reinforcing bar is stud welded to a plate surface of the base power distribution anchor (11). The front leg plate (9) of the expansion joint support base (B1) is shaped into a substantially inverted L shape or a substantially T shape in the same or different side view,
An elastic water stop belt (10) sandwiched by a pressing plate (15) on a vertical front surface or rear surface of the front leg plate (9) is detachably fixed by a plurality of screw fasteners (16). The buried structure of the expansion joint in the road bridge according to claim 1. The front leg plate (9) of the expansion joint support base (B1) is shaped into a substantially inverted L shape or a substantially T shape in the same or different side view,
The elastic water stop belt (10) clamped by the pressing plate (15) to the substantially horizontal upper or lower surface of the front leg plate (9) is detachably fixed by a plurality of screw fasteners (16). The buried structure of the expansion joint in the road bridge according to claim 1.   The front leg plate (9) of the expansion joint support base (B1) has a substantially L shape in a side view, and the lower end facing the play (S) of the road bridge, the weir cover (17) of the back-cast concrete (8) The embedment structure of the expansion joint in the road bridge according to claim 1, wherein the two are welded in an added state. A pair of front leg plates (32) set up in an opposing state across the gap (S) of the road bridge;
A pair of rear leg plates (33) extending parallel to the front leg plate (32);
By connecting the front leg plate (32) and the rear leg plate (33) to each other, a substantially horizontal ceiling plate (34) indicating a post-cast concrete scraping depth level (L-L) at the time of repairing. ) And a side-viewed gate character that bends in series,
A portion of the ceiling plate (34) that is notched and distributed to the post-cast concrete distribution port (35) remains as a base distribution anchor (36), from which a plurality of anchor columns (37) are integrated. And standing up
Using the expansion joint support base (B2) in which the elastic water-stop belt (10) is attached to both the front leg plates (32) in a shielded state of the play (S),
Such a support base (B2) is placed between the concrete floor slabs (1) of the road bridge or the bottom surface (4) of the boxed recess (G) formed in the concrete floor slab (1) and the abutment (2). The base distribution anchor (36) is installed in a state where it floats from the bottom surface (4) of the unboxing recess (G),
The existing embedded muscle (5) and / or the pierced bar anchor (5) and / or the reinforced bar anchor (6) which is erected in advance from the bottom surface (4) of the unboxing recess (G). 7), each of which is welded via an assembly primary thread (13) which lies in a crossing manner with its base force distribution anchor (36),
The existing joint force distribution anchor (23) provided in the expansion joints (A1) (A2) (A3) (A4) itself mounted on the support base (B2) is replaced with the base force anchor ( 36) welding to the anchor struts (37) standing up from the joint through the secondary through-bars (30) for assembly, which are transversely crossed with the joint force distribution anchors (23).
The support base (B2) embedded and integrated with the expansion joints (A1), (A2), (A3), and (A4) at the same time by post-cast concrete (8) cast from above into the boxed recess (G). In a road bridge characterized in that the anchor strut (37) is maintained so that it can be used repeatedly for assembling new expansion joints (A1) (A2) (A3) (A4) to be replaced at the time of repair. Expansion joint embedded structure. A pair of front leg plates (32) set up in an opposing state across the gap (S) of the road bridge;
A pair of rear leg plates (33) extending parallel to the front leg plate (32);
A plurality of substantially horizontal ceiling partitions showing a post-cast concrete scraping depth level (L-L) at the time of repair by bridging the front leg plate (32) and the rear leg plate (33). From the plate (34a), as a framework lattice form in which the adjacent space between the ceiling partition plates (34a) is a post-cast concrete distribution port (35a),
A plurality of anchor posts (37) are integrally raised from each ceiling partition plate (34a),
Using the expansion joint support base (B3) in which the elastic water-stop belt (10) is attached to the both front leg plates (32) in a shielded state of the clearance (S),
Such a support base (B3) is placed between the concrete floor slabs (1) of the road bridge or the bottom surface (4) of the boxed recess (G) formed in the concrete floor slab (1) and the abutment (2). After installing the ceiling partition plate (34a) so that it floats from the bottom surface (4) of the unboxing recess (G),
The existing embedded muscles (5) and / or reinforced bar anchors (7) in which the ceiling partition plate (34a) of the support base (B3) is erected in advance from the bottom surface (4) of the box recess (G). ) To each other through an assembly primary thread (13) that crosses the ceiling partition plate (34a).
The existing joint distribution anchor (23) provided in the expansion joints (A1), (A2), (A3) and (A4) itself mounted on the support base (B3) is attached to the ceiling partition plate (34a) of the support base (B3). ) To the anchor strut (37) standing up from the joint through the secondary thread (30) for assembly that crosses the joint distribution anchor (23).
The support base (B3) embedded and integrated with the expansion joints (A1), (A2), (A3), and (A4) at the same time by post-cast concrete (8) cast from above into the boxed recess (G). In a road bridge characterized in that the anchor strut (37) is maintained so that it can be used repeatedly for assembling new expansion joints (A1) (A2) (A3) (A4) to be replaced at the time of repair. Expansion joint embedded structure.   An anchor post (37) and a separate post-cast concrete gibber (38) are stud-welded to the ceiling plate (34) or ceiling partition plate (34a) of the support bases (B2) and (B3) for expansion joints. The embedded structure of the expansion joint in the road bridge of Claim 8 or 9. By setting up an inverted L shape or substantially T shape in side view that is the same or different from each other, in an opposing state with the gap (S) between the road bridges in between, the post-cast concrete scraping depth level (L- L) a pair of front leg plates (32),
A pair of rear leg plates (33) arranged in parallel with the front leg plate (32) in a substantially inverted L shape or substantially T shape in side view, which are also the same or different from each other;
From the plurality of substantially vertical partition wall plates (34b) that connect the front leg plate (32) and the rear leg plate (33) to each other, the partition wall plates (34b) are adjacent to each other. As the framework lattice form that becomes the cast concrete distribution port (35b),
A plurality of anchor columns (37) are integrally raised from the substantially horizontal upper surfaces of the front leg plate (32) and the rear leg plate (33),
Using the expansion joint support base (B4) formed by attaching the elastic waterproof belt (10) to the both front leg plates (32) in the shielded state of the play (S),
Such a support base (B4) is placed between the concrete floor slabs (1) of road bridges or to the bottom surface (4) of the boxed recess (G) formed in the concrete floor slab (1) and the abutment (2). After the upper surfaces of the front leg plate (32) and the rear leg plate (33) are floated from the bottom surface (4) of the unboxing recess (G),
The existing embedded muscle (5) and / or the pierced bar anchor (7) in which the partition wall plate (34b) of the support base (B4) is erected in advance from the bottom surface (4) of the boxing recess (G). ) To each other through the primary through-bars (13) for assembly that crosses the partition wall plate (34b).
The expansion joints (A1), (A2), (A3), and (A4) mounted on the support base (B4) are provided with the existing joint force distribution anchor (23), and the front leg plate (32) of the support base (B4). And the anchor strut (37) standing up from the rear leg plate (33) through the secondary through-bars (30) for assembling in a crossed state with the joint distribution anchor (23). And
The support base (B4) embedded and integrated with the expansion joints (A1), (A2), (A3), and (A4) at the same time by post-cast concrete (8) cast from above into the boxed recess (G). In a road bridge characterized in that the anchor strut (37) is maintained so that it can be used repeatedly for assembling new expansion joints (A1) (A2) (A3) (A4) to be replaced at the time of repair. Expansion joint embedded structure.   12. A road according to claim 11, wherein a receiving seat (41) or a receiving hole (42) of the primary thread (13) is cut out in the partition wall plate (34b) of the support base for expansion joint (B4). The buried structure of expansion joints in bridges.   The elastic water stop belt (10) sandwiched by the pressing plate (15) on the front surface of the front leg plate (32) of the expansion joint support base (B2) (B3) (B4) is connected to a plurality of screw fasteners (16 The embedment structure of the expansion joint in the road bridge according to claim 8, 9 or 11, wherein   12. A road bridge according to claim 8, 9 or 11, characterized in that a post-cast concrete gibber (39) is stud welded to the rear leg plate (33) of the expansion joint support base (B2) (B3) (B4). The buried structure of expansion joints. The rear support plate (33) for the expansion joint support base (B2), (B3), (B4) is suspended more shallowly than the front leg plate (32), and
An adjustment stand (40) for mounting the support bases (B2), (B3), and (B4) in a substantially horizontal installation state is welded to the leg plate (33) in a distributed state at every required interval thereafter. The buried structure of the expansion joint in the road bridge according to claim 8, 9 or 11. A base distribution anchor made of a separate reinforcing bar or steel plate from the rear leg plate (33) of the expansion joint support base (B2) (B3) (B4) toward the wall surface (6) of the unboxing recess (G) ( 43) and extending and extending a plurality of pieces integrally,
The existing embedded muscle which protrudes in advance from the wall surface (6) of the boxing recess (G) with the anchor strut (44) continuously bent and raised from the projecting tip of each base distribution anchor (43). (5) or / and welded to the reinforced bar anchor (7) via another primary thread (45) for assembly that crosses the base distribution anchor (43). The embedded structure of the expansion joint in the road bridge according to claim 8, 9 or 11. The expansion joint (A4) mounted on the expansion joint support base (B2) (B3) (B4) is suspended at a position substantially corresponding to the front leg plate (32) of the support base (B2) (B3) (B4). A pair of post-cast concrete weir plates (48)
A plurality of distribution anchor plates (49) projecting integrally from the both damming plates (48) in opposite directions toward each other as an array distribution state at required intervals;
By projecting integrally from the both damming plates (48) to the opposite front as an arrangement distribution state at every required interval, the interleaved comb-shaped meander gaps (W) in the plan view are separated from the gaps of the road bridge ( S) a plurality of finger plates (50) defined above;
Shaped as a load support type comprising an elastic sealing material (51) filled in the meander gap (W) adjacent to each other between the finger plates (50),
The load anchoring plate (49) of the load-supporting expansion joint (A4) is cut into the distribution anchor plate (49) as a continuous thick steel plate or cast iron with the finger plate (50). The secondary thread (30) is laid in a crossed state in the receiving seat (57) or the receiving hole (58) for the secondary thread,
The intersection of the anchor support column (37) standing up from the support base (B2) (B3) (B4) for the expansion joint and the secondary thread (30) is welded, respectively. The embedded structure of the expansion joint in the road bridge of 11.   The embedding of an expansion joint in a road bridge according to claim 17, characterized in that a recess (54) for preventing slipping of a passing vehicle is provided on the upper end of the finger plate (50) of the expansion joint (A4). Construction.   18. The road bridge according to claim 17, wherein the finger plate (50) of the expansion joint (A4) has a T-shaped cross section and is provided with irregularities (56) for preventing slipping of a passing vehicle on its substantially horizontal upper surface. The buried structure of expansion joints.   18. An expansion joint for a road bridge according to claim 17, wherein the projecting tip portion of the distribution anchor plate (49) in the expansion joint (A4) is connected and integrated by means of a space regulating bar (59) that intersects this. Buried structure. From the top to the overhanging tip of the distribution anchor plate (49) in the expansion joint (A4), the anti-vibration joint swing prevention bar (61) is horizontally mounted with the post-cast concrete weir plate (48) as the swing fulcrum. While letting
The anchor strut (37) rising from the expansion joint support base (B4) is used as a screw rod, and the rocking prevention bar (61) is pressed from above by a fixing nut (62) that is detachably fastened to the screw rod. The buried structure of the expansion joint in the road bridge according to claim 17, wherein the expansion joint is integrated. Welding plate (48) for post-cast concrete by attaching and welding an enclosure plate (63) and a bottom plate (64) made of a thinner steel plate to the finger plate (50) of the expansion joint (A4) And framed in a generally rectangular or nearly parallelogram shape in plan view with
18. Resin concrete, non-shrinkage mortar, cement mortar, and other various fillers (65) having finer aggregate particle size than post-cast concrete (8) are placed in the frame from above. The buried structure of the expansion joint in the described road bridge. The elastic waterproof belt (10) of the expansion joint support base (B1), (B2), (B3), and (B4) is shaped like a bowl, and its upper end is attached to one of the front leg plates (9) and (32) by an adhesive. Affix or vulcanize and bond
Similarly, the other upper end of the elastic water-stop belt (10) is sandwiched between the other front leg plates (9) and (32) by the pressing plate (15) and is detachably fixed by a plurality of screw fasteners (16). The embedment structure of the expansion joint in the road bridge according to claim 1, 8, 9 or 11.   The elastic waterproof belt (10) of the expansion joint support bases (B1), (B2), (B3), and (B4) is received as a saddle shape, and its upper ends are attached to both front leg plates (9) and (32) with an adhesive. The structure for embedding an expansion joint in a road bridge according to claim 1, 8, 9, or 11, which is attached or vulcanized.   The elastic waterproofing belt (10) of the support base for expansion joints (B1), (B2), (B3), and (B4) is used as a saddle shape, and the inside thereof is filled with sponge and other soundproofing and waterproofing material (18). The buried structure of the expansion joint in the road bridge according to claim 1, 8, 9, or 11.   The elastic waterproof belt (10) of the expansion joint support bases (B1), (B2), (B3), and (B4) has a unit length (L2) that substantially corresponds to one lane of the road bridge, and the expansion joints (A1) (A2 ) Along with the unit length (L1) of (A3), a separate elastic waterproof pad (19) is bonded to the seam (J) between the elastic waterproof belts (10) from above in a polymerized state. The embedment structure of the expansion joint in the road bridge according to claim 1, 8, 9 or 11, wherein the structure is integrated.   The elastic waterproof belt (10) of the expansion joint support bases (B1), (B2), (B3), and (B4) is used as a saddle shape, and a porous pipe (P1) for drainage is laid inside thereof. The buried structure of the expansion joint in the road bridge according to claim 1, 8, 9 or 11.

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