JP2018141284A - Joint structure for shear reinforcement steel member of steel concrete composite structure and joint method for shear reinforcement member of steel concrete composition structure - Google Patents

Abstract

The present invention provides a joining structure of a shear-reinforced steel material of a steel-concrete composite structure and a method of joining a shear-reinforced steel material of a steel-concrete composite structure, which can easily join together the steel-concrete composite structure. A plate-like first shear reinforcing steel material 33 and a second shear reinforcing steel material 42 each capable of bearing a shearing force in a steel-concrete composite structure are disposed in the vicinity (part) of the end portion of the first shear reinforcing steel material 33. The plate-like first opposing plate portion 334 and the plate-like second opposing plate portion 425 provided in the vicinity (part) of the end portion of the second shear reinforcing steel material 42 are opposed to each other. The first counter plate portion 334 and the second counter plate portion 425 are integrally embedded in the joint concrete portion 51. [Selection] Figure 5

Description

  The present invention relates to a joining structure of a shear-reinforced steel material having a steel-concrete composite structure and a joining method of a shear-reinforced steel material having a steel-concrete composite structure.

  Steel-concrete composite structures such as reinforced concrete structures and steel-framed reinforced concrete structures are adopted as structures such as railway viaducts, railway stations, and large culverts. When constructing a steel-concrete composite structure, the formwork is supported by a support that matches the concrete loading load. For this reason, the larger the members such as the beams, columns, and slabs that make up the structure, the smaller the installation interval of the support works, which may limit the passage of the construction vehicle. In addition, since the period for installing the support works is long including the period for installing and dismantling the support works, a huge cost is required. For this reason, the steel concrete composite structure which can aim at work period shortening is proposed (for example, refer patent documents 1 and 2).

Japanese Patent Laid-Open No. 2015-200188 Japanese Utility Model Publication No. 53-11530

However, when building a joint between a column and a beam, or a joint between a side wall and a top plate in a large culvert, it is necessary to arrange a large number of shear reinforcement bars. There is also a problem that it takes a work period. In addition, even when a half precast member is used as a member to be joined, it is necessary to arrange a shear reinforcement bar at the joint, and there is a problem that work and labor are required.
In addition, there is a case where a shear reinforcement steel material that bears the shear force is installed instead of a shear reinforcement bar at the joint, but it is necessary to weld the shear reinforcement steel materials or mechanically join them with bolts, etc. There is a problem that it takes labor and work time to install the reinforced steel.

  Therefore, the present invention provides a joining structure of a shear-reinforced steel material having a steel-concrete composite structure and a joining method of a shear-reinforced steel material having a steel-concrete composite structure, which can easily join together the steel-concrete composite-reinforced shear-reinforced steel materials. With the goal.

  In order to achieve the above object, the joint structure of the shear-reinforced steel material of the steel-concrete composite structure according to the present invention includes a first shear-reinforced steel material and a second shear-reinforced steel material each capable of bearing a shear force in the steel-concrete composite structure, A plate-like counter plate portion provided in each part is arranged so that the plate surfaces face each other, and each of the counter plate portions is embedded in a joint concrete portion integrally. .

  In order to achieve the above object, a method for joining shear-reinforced steel materials of a steel-concrete composite structure according to the present invention includes a first shear-reinforced steel material capable of bearing a shear force in the steel-concrete composite structure, a second shear-reinforced steel material, In the method for joining a shear-reinforced steel material having a steel-concrete composite structure, the plate-like opposing plate portions provided in a part of each of the first shear-reinforced steel material and the second shear-reinforced steel material are opposed to each other. And installing the opposing plate portion of the first shear reinforcing steel material and the opposing plate portion of the second shear reinforcing steel material integrally with a joint concrete portion after the shear reinforcing steel material installing step and the shear reinforcing steel material installing step. A joining concrete part placing step.

In the present invention, the first opposing plate portion of the first shear reinforcing steel material and the second opposing plate portion of the second shear reinforcing steel material are arranged so that their plate surfaces face each other, and are embedded integrally in the joint concrete portion. Yes. Thereby, since each of a 1st opposing board part and a 2nd opposing board part fixes with a joining concrete part, it can join a 1st shear reinforcement steel material and a 2nd shear reinforcement steel material easily via a joining concrete part. it can.
In addition, since the first counter plate portion and the second counter plate portion may be arranged to face each other, when positioning the second counter plate portion with respect to the first counter plate portion, for example, the first counter plate portion Since there are few restrictions, such as having to make the axis line of this and the axis line of a 2nd opposing board part correspond, a 1st shear reinforcement steel material and a 2nd shear reinforcement steel material can be joined easily.
Moreover, since the 1st shear reinforcement steel material provided with the 1st opposing board part and the 2nd shear reinforcement steel material provided with the 2nd opposing board part are arrange | positioned, even if it does not provide a shear reinforcement, the 1st shear reinforcement steel The steel material and the second shear reinforcement steel material can bear the shearing force.

Moreover, in the joining structure of the shear reinforcement steel material of the steel concrete composite structure which concerns on this invention, the said 1st shear reinforcement steel material and the said 2nd shear reinforcement steel material do not need to be mechanically joined.
In the present invention, the first shear reinforcement steel material and the second shear reinforcement steel material are joined without mechanically joining the first opposing plate portion and the second opposing plate portion by, for example, bolt joining or the like. 1 shear reinforcement steel material and 2nd shear reinforcement steel material can be joined easily.
When the second counter plate part is positioned with respect to the first counter plate part by mechanically joining the first counter plate part and the second counter plate part, for example, the axis of the first counter plate part Since there are few restrictions, such as having to match the axis of the 2nd counter board part, the 1st shear reinforcement steel material and the 2nd shear reinforcement steel material can be joined easily.

Moreover, in the joining structure of the shear-reinforced steel material of the steel concrete composite structure according to the present invention, a precast concrete member may be attached to at least one of the first shear-reinforced steel material and the second shear-reinforced steel material.
By adopting such a configuration, work on site can be reduced. Moreover, if the precast concrete member is used as the formwork of the joint concrete part, the work at the site can be further reduced.

Moreover, in the joining structure of the shear reinforcement steel material of the steel concrete composite structure which concerns on this invention, the 1st through-hole which penetrates a board surface is formed in the said opposing board part of a said 1st shear reinforcement steel material, The said 2nd shear A second through hole penetrating the plate surface is formed in the opposing plate portion of the reinforcing steel material, and a through reinforcing bar penetrating both the first through hole and the second through hole is embedded in the joint concrete portion. May be.
By setting it as such a structure, since a joining concrete part is reinforced with a penetration reinforcement, the 1st shear reinforcement steel material and the 2nd shear reinforcement steel material can be joined firmly.

Moreover, in the joint structure of the shear-reinforced steel material of the steel concrete composite structure according to the present invention, a fixing body that fixes to the concrete of the joint concrete portion may be connected to the tip portion of the penetration reinforcing bar.
By adopting such a configuration, the penetration reinforcing member is more firmly fixed to the bonded concrete by the fixing body, and the bonded concrete portion is further reinforced, so that the first shear reinforcing steel material and the second shear reinforcing steel material are bonded more firmly. be able to.

Moreover, in the joining structure of the shear-reinforced steel material of the steel-concrete composite structure according to the present invention, at least one of the opposed plate portion of the first shear-reinforced steel material and the opposed plate portion of the second shear-reinforced steel material is a diver. The gibber may be embedded in the joint concrete portion.
By adopting such a configuration, at least one of the first counter plate portion and the second counter plate portion and the joint concrete portion can be integrated by a dowel, so that the first shear reinforcement steel material and the second shear reinforcement steel material Can be joined more firmly.

Further, in the joint structure of the shear-reinforced steel material of the steel-concrete composite structure according to the present invention, at least one of the opposed plate portion of the first shear-reinforced steel material and the opposed plate portion of the second shear-reinforced steel material is stiffened. A material may be provided, and the stiffener may be embedded in the joint concrete portion.
By setting it as such a structure, since at least one of a 1st opposing board part and a 2nd opposing board part and a joining concrete part can be integrated by a stiffener, a 1st shear reinforcement steel material and a 2nd shear The reinforcing steel material can be bonded more firmly.

Moreover, in the joining structure of the shear-reinforced steel material of the steel-concrete composite structure according to the present invention, a plurality of shear-reinforcing steel materials of at least one of the first shear-reinforcing steel material and the second shear-reinforcing steel material are provided. Further, in the shear reinforcing steel material, the opposing plate portions may be restrained by a restraining member.
By setting it as such a structure, the position shift of the multiple shear reinforcement steel materials can be prevented.

Moreover, in the joining structure of the shear reinforcement steel material of the steel concrete composite structure which concerns on this invention, the said 1st shear reinforcement steel material and the 2nd shear reinforcement steel material may be joined from the direction which mutually cross | intersects.
By setting it as such a structure, a 1st shear reinforcement steel material and a 2nd shear reinforcement steel material can be easily joined also in a corner part.

Moreover, in the joining structure of the shear reinforcement steel material of the steel concrete composite structure which concerns on this invention, the said opposing board part of at least one shear reinforcement steel material of the said 1st shear reinforcement steel material and the said 2nd shear reinforcement steel material is the said crossing direction. The other of them may extend toward the side facing the shear-reinforced steel material.
Even with this configuration, the opposing plate portion of the first shear reinforcing steel material and the opposing plate portion of the second shear reinforcing steel material are disposed to face each other even at the corners and the like. A steel material and a 2nd shear reinforcement steel material can be joined reliably.

Moreover, in the joining structure of the shear reinforcement steel material of the steel concrete composite structure which concerns on this invention, the said 1st shear reinforcement steel material and the 2nd shear reinforcement steel material may be joined from the mutually opposing direction on the same straight line.
By setting it as such a structure, the 1st shear reinforcement steel material and the 2nd shear reinforcement steel material can be easily joined also in a straight part.

Moreover, in the joining structure of the steel-concrete composite structure according to the present invention, the first shear-reinforced steel material is provided in the first structure of the steel-concrete composite structure, and the second shear-reinforced steel material is steel concrete. You may be provided in the 2nd structure of a composite structure.
With such a configuration, the first shear reinforcement steel material and the second shear reinforcement steel material are joined via the joint concrete portion, thereby the first structure body provided with the first shear reinforcement steel material, and the second The second structure provided with the shear reinforcing steel material can be easily joined.
Moreover, the 1st shear reinforcement steel material and 2nd shear reinforcement steel material which are arrange | positioned at the junction part of a 1st structure and a 2nd structure body can bear the shear force which acts on this junction part. Thereby, it is not necessary to arrange a shear reinforcing bar at the joint between the first structure and the second structure, and the first structure and the second structure can be easily joined. When the joint portion between the body and the second structure is a corner portion, the work of arranging the shear reinforcement bars at the joint portion requires a lot of labor and time, so the first structure and the second structure The body can be more easily joined.

In the joint structure of the steel-concrete composite structure of the steel-concrete structure according to the present invention, the first structure has a first reinforcing bar, the second structure has a second reinforcing bar, the first reinforcing bar, The second rebar may be integrally embedded in the joint concrete portion.
By setting it as such a structure, while a joining concrete part is reinforced with a 1st reinforcing bar and a 2nd reinforcing bar, a 1st structure part and a 2nd structure part can be joined firmly.

Moreover, in the joint structure of the shear-reinforced steel material of the steel-concrete composite structure according to the present invention, the first structure is a column part of the structure, and the second structure is a beam part of the structure. Also good.
By setting it as such a structure, the column part and beam part of a steel concrete composite structure can be joined easily.

In the joint structure of the steel-concrete composite structure according to the present invention, the first structure may be a side wall portion of a culvert, and the second structure may be a top plate portion of the culvert. Good.
By setting it as such a structure, the side wall part and top plate part of a culvert can be joined easily.

Further, in the joint structure of the steel-concrete composite structure according to the present invention, the first structure is a bottom plate portion of the retaining wall, and the second structure is a wall portion of the retaining wall. Also good.
By setting it as such a structure, the bottom plate part and wall part of a retaining wall can be joined easily.

Moreover, in the joining structure of the shear reinforcement steel material of the steel concrete composite structure which concerns on this invention, you may have a haunch part joined with the other in at least one of a 1st structure and a 2nd structure.
By setting it as such a structure, a haunch part can be formed easily.

Moreover, in the joining structure of the shear-reinforced steel material of the steel-concrete composite structure according to the present invention, each of the first shear-reinforced steel material and the second shear-reinforced steel material is a shape steel, and the opposed plate of the first shear-reinforced steel material And the counter plate portion of the second shear reinforcing steel material may each be a web of the shape steel.
By adopting such a configuration, it is not necessary to manufacture dedicated members as the first shear reinforcing steel material and the second shear reinforcing steel material, and therefore the first shear reinforcing steel material and the second shear reinforcing steel material can be easily procured. it can.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to join a 1st shear reinforcement steel material and a 2nd shear reinforcement steel material easily, the labor and cost concerning joining with a 1st shear reinforcement steel material and a 2nd shear reinforcement steel material can be reduced. The construction period can be shortened.

It is a perspective view explaining the culvert which adopted the joining structure of the shear reinforcement steel material of the steel concrete composite structure concerning a 1st embodiment of the present invention. It is a perspective view which shows the side wall part by 1st Embodiment of this invention. It is another perspective view which shows the side wall part by 1st Embodiment of this invention. It is a perspective view which shows the top plate part by 1st Embodiment of this invention. It is a perspective view explaining the junction part of the top plate part and side wall part by 1st Embodiment of this invention. It is a top view explaining the junction part of the top plate part and side wall part by 1st Embodiment of this invention. It is a perspective view explaining the bottom slab part construction process of the joining method of the shear reinforcement steel material of the steel concrete composite structure concerning a 1st embodiment of the present invention. It is a perspective view explaining the side wall part construction process of the joining method of the shear reinforcement steel materials of the steel concrete composite structure which concerns on 1st Embodiment of this invention. It is a perspective view explaining the side wall part construction process following FIG. It is a perspective view explaining the top plate part construction process of the joining method of the shear reinforcement steel materials of the steel concrete composite structure concerning a 1st embodiment of the present invention. It is a perspective view explaining the top plate part construction process following FIG. It is a perspective view explaining the top plate part construction process following FIG. It is a perspective view explaining the joining structure of the shear reinforcement steel material of the steel concrete composite structure which concerns on 2nd Embodiment of this invention. It is a figure which shows a penetration reinforcement and a fixing member. It is a perspective view explaining the joining structure of the shear reinforcement steel material of the steel concrete composite structure which concerns on 3rd Embodiment of this invention. It is a perspective view which shows the top plate part by 3rd Embodiment of this invention. It is a perspective view explaining the joining structure of the shear reinforcement steel material of the steel concrete composite structure which concerns on 4th Embodiment of this invention. It is a perspective view explaining the joining structure of the shear reinforcement steel material of the steel concrete composite structure which concerns on 5th Embodiment of this invention. It is another perspective view explaining the joining structure of the shear reinforcement steel material of the steel concrete composite structure which concerns on 5th Embodiment of this invention. It is a perspective view explaining the joining structure of the shear reinforcement steel material of the steel concrete composite structure which concerns on 6th Embodiment. It is a perspective view explaining the modification of the structure of the joining shear reinforcement steel material of the steel concrete composite structure which concerns on embodiment of this invention. It is a perspective view explaining the other modification of the structure of the joining shear reinforcement steel material of the steel concrete composite structure which concerns on embodiment of this invention.

(First embodiment)
Hereinafter, the joining structure of the shear-reinforced steel material of the steel concrete composite structure by embodiment of this invention is demonstrated based on FIG. 1 thru | or FIG.
As shown in FIG. 1, the joint structure 1A of the steel-concrete composite structure of the steel-concrete structure according to the present embodiment includes a side wall portion (first structure) 3 and a top plate portion (second structure) 4 of the culvert 2. It is employed in a joint structure that is joined via the joint 5.
A horizontal direction in which the culvert 2 extends is defined as a length direction, and a horizontal direction orthogonal to the length direction is defined as a width direction.
The culvert 2 includes a bottom plate 11, a pair of side walls 12, 12 disposed on the upper sides of both ends in the width direction of the bottom plate 11, and a top plate 13 disposed on the pair of side walls 12, 12. Have.

The bottom plate 11 is composed of a plurality of bottom plate portions 6, 6... Arranged in the length direction. The bottom plate portions 6 and 6 adjacent in the length direction are joined to each other.
A pair of side walls 12 and 12 is comprised by several side wall part 3,3 ... arranged in the length direction, respectively. The side wall parts 3 and 3 adjacent to each other in the length direction are joined to each other.
The top plate 13 is composed of a plurality of top plate portions 4, 4... Arranged in the length direction. The top plate portions 4 and 4 adjacent in the length direction are joined to each other.
In the construction of the culvert 2, one bottom plate portion 6, a pair of side wall portions 3, 3 disposed above both end portions of the bottom plate portion 6, and a pair of side wall portions 3, 3 disposed above the pair of side wall portions 3, 3. The culvert 2 is constructed by forming the top plate portions 4 as one unit 14 and sequentially constructing the units 14 in the length direction.
Alternatively, the bottom plate portion 6 and the pair of side wall portions 3 may be constructed as a single unit, and the units may be sequentially constructed in the length direction, and then the entire top plate 13 may be built by concrete on site.

  The bottom plate portion 6 is formed in a long and substantially rectangular parallelepiped shape extending in the width direction. The bottom plate portion 6 is provided with side wall connection portions 61 and 61 to which the side wall portion 3 is connected at the upper portions near both ends in the width direction. The bottom plate portion 6 is constructed of, for example, reinforced concrete.

  The pair of side wall portions 3 and 3 are respectively a first outer shell portion (precast concrete member) 31 and a second outer shell portion (precast concrete member) 32 made of precast concrete and spaced apart in the width direction. A first shear reinforcing steel material 33 disposed between the first outer shell portion 31 and the second outer shell portion 32 and a side wall concrete portion 34 placed between the first outer shell portion 31 and the second outer shell portion 32. And have.

The first outer shell portion 31 and the second outer shell portion 32 are each formed in a long flat plate shape, and are arranged in a direction extending in the vertical direction so that the plate surface faces the width direction.
In the side wall part 3 arranged on one side in the width direction of the pair of side wall parts 3, 3, the first outer shell part 31 is arranged along the edge part on the other side in the width direction of the side wall part 3, and the second The outer shell portion 32 is disposed along the edge portion on one side in the width direction of the side wall portion 3, and the side wall portion 3 disposed on the other side in the width direction of the pair of side wall portions 3, 3 has a first outer shell. The part 31 is arranged along the edge on one side in the width direction of the side wall part 3, and the second outer shell part 32 is arranged along the edge on the other side in the width direction of the side wall part 3.

  The side wall part 3 arranged on one side in the width direction and the side wall part 3 arranged on the other side in the width direction are formed in a symmetric form in the width direction. For this reason, below, the form of the side wall part 3 arrange | positioned at the one side of the width direction is demonstrated, and description is abbreviate | omitted about the form of the side wall part 3 arrange | positioned at the other side of the width direction. In FIG. 2 and FIG. 3, the side wall part 3 arrange | positioned at the one side of the width direction is shown. 2 and 3, the illustration of the side wall concrete portion 34 is omitted.

  As shown in FIG. 2 and FIG. 3, the first outer shell portion 31 and the second outer shell portion 32 include a concrete portion 311 and a plurality of first rebars 312, 312, etc. embedded in the concrete portion 311. Have. The plurality of first rebars 312, 312... Are arranged in the lengthwise direction so as to extend in the vertical direction. The plurality of first rebars 312, 312... Protrude upward from the upper end surface of the concrete portion 311. A portion of the first rebar 312 that protrudes upward from the concrete portion 311 is referred to as a first rebar joint 313.

  The first shear reinforcing steel material 33 is made of I-type steel, and is arranged so that the plate surface of the web 331 faces the length direction extending in the vertical direction. In the first shear reinforcing steel material 33, a first flange 332 disposed on the other side in the width direction is joined to the first outer shell portion 31, and a second flange 333 disposed on one side in the width direction is a second outer shell. It is joined to the part 32. The upper portion of the first shear reinforcing steel material 33 is disposed above the concrete portion 311 of the first outer shell portion 31 and the second outer shell portion 32. The web 331 in the upper part of the first outer shell part 31 and the second outer shell part 32 of the first shear reinforcing steel material 33 above the concrete part 311 is defined as a first counter plate part 334.

As for the 1st opposing board part 334, the corner | angular part of the one side of the upper width direction is cut off. A steel plate 334 a that is continuous with the first flange 332 of the first shear reinforcing steel material 33 is provided on the edge portion along the upper edge portion and the corner cut portion of the first counter plate portion 334.
The first opposing plate portion 334 is provided with a rib (stiffener) 335 that protrudes from the plate surface and extends in the width direction at an intermediate portion in the height direction. The ribs 335 are provided on both surfaces of the first counter plate portion 334. The leading ends of the ribs 335 in the protruding direction are continuous with the leading ends of the first flange 332 and the second flange 333.

A hole 336 penetrating in the thickness direction of the web 331 in the web 331 in the lower portion of the first shear reinforcing steel material 33 than the first counter plate portion 334 has a height direction (the length direction of the web 331). ) Are formed at intervals. These hole portions 336, 336... Are configured so that the side wall concrete portion 34 enters in order to fix the first shear reinforcement steel material 33 and the side wall concrete portion 34.
In the present embodiment, the two first shear reinforcing steel materials 33, 33 are arranged between the first outer shell portion 31 and the second outer shell portion 32 with a distance in the length direction.

  The side wall concrete portion 34 is placed at the site where the culvert 2 (see FIG. 1) is constructed. Reinforcing bars (not shown) are appropriately disposed in the side wall concrete portion 34. The side wall concrete portion 34 has molds arranged on both sides in the length direction of the first outer shell portion 31 and the second outer shell portion 32, and the mold frame and the first outer shell portion 31 and the second outer shell portion 32 It is constructed by placing reinforcing bars in the enclosed space and placing concrete in this space.

The side wall concrete portion 34 is provided at a height corresponding to the upper end portion from the lower end portion of the concrete portion 311 of the first outer shell portion 31 and the second outer shell portion 32. For this reason, the 1st opposing board part 334 of the 1st shear reinforcement steel material 33 is not embed | buried in the side wall concrete part 34, but the part below the 1st opposing board part 334 of the 1st shear reinforcement steel material 33 is a side wall. It is embedded in the concrete part 34.
In this embodiment, the first outer shell portion 31, the second outer shell portion 32, the two first shear reinforcing steel members 33, 33, and the reinforcing bars of the side wall concrete portion 34 are side wall precast members 37 assembled in advance in a factory or the like. It is set to be brought into the field after being manufactured.
It should be noted that the first outer shell portion 31, the second outer shell portion 32, the two first shear reinforcing steel materials 33 and 33, and the reinforcing bars of the side wall concrete portion 34 may be assembled on site without being precast members.

As shown in FIGS. 1 and 4, the top plate portion 4 includes a lower plate portion (precast concrete member) 41 made of precast concrete disposed on the lower side, and a second shear disposed on the upper side of the lower plate portion 41. A reinforcing steel material 42 and a top concrete portion 43 placed on the upper side of the lower plate portion 41 are provided. In FIG. 4, the top concrete part 43 is omitted.
As shown in FIG. 4, the lower plate portion 41 is formed in a long flat plate shape, and is arranged in a direction extending in the width direction so that the plate surface faces the vertical direction. The lower plate portion 41 has a concrete portion 411 and a plurality of second reinforcing bars 412 embedded in the concrete portion 411. The plurality of second reinforcing bars 412 are arranged at intervals in the length direction in directions extending in the width direction. The plurality of second reinforcing bars 412 have both end portions in the width direction projecting outward in the width direction from both end surfaces in the width direction of the concrete portion 411. Parts of the second reinforcing bar 412 that protrude outward from the concrete part 411 in the width direction are referred to as second reinforcing bar joints 413 and 413, respectively.

  The second reinforcing bar joint portion 413 includes a horizontal portion 413a extending from the lower plate concrete portion 45 to one side in the width direction, and a vertical portion 413b extending from one end portion in the width direction of the horizontal portion 413a to the lower side. doing. The second reinforcing bar joint portion 413 includes a horizontal portion 413a extending from the lower plate concrete portion 45 to the other side in the width direction, and a vertical portion 413b extending from the other end portion in the width direction of the horizontal portion 413a to the lower side. doing.

  In the lower plate portion 41, a hunch portion 47 is formed over the entire length direction of the lower plate portion 41 on the lower side of both end portions in the width direction. The lower surface of the haunch portion 47 is formed as an inclined surface that gradually goes downward from the inner side to the outer side in the width direction.

The second shear reinforcing steel material 42 is made of I-type steel, and is arranged so as to extend in the width direction and the plate surface of the web 421 faces the length direction. The second shear reinforcement steel material 42 is embedded in the lower plate portion 41 in the vicinity of the lower edge portion of the first flange 423 disposed on the lower side and the intermediate portion in the length direction of the web 421. Note that the second flange 424 disposed on the upper side and the upper side of the intermediate portion in the length direction of the web 421 of the second shear reinforcing steel material 42 is not embedded in the lower plate portion 41, and is not embedded in the lower plate portion 41. It is arranged above.
As for the 2nd shear reinforcement steel material 42, the both ends of the width direction are arrange | positioned on the outer side of the width direction rather than the edge part of the width direction of the concrete part 411 of the lower board part 41. FIG. The webs 421 in the portions of the second shear reinforcing steel material 42 that protrude on both sides in the width direction from the lower plate concrete portion 45 of the lower plate portion 41 are referred to as second opposing plate portions 425 and 425, respectively.

The second counter plate portion 425 has corners on the upper outer side in the width direction. A steel plate 425 a continuous with the second flange 424 of the second shear reinforcing steel material 42 is provided on the outer edge in the width direction of the second counter plate 425 and the edge along the corner cut portion.
The second opposing plate portion 425 is provided with a rib (stiffener) 426 that protrudes from the plate surface and extends in the vertical direction at an intermediate portion in the width direction. The ribs 426 are provided on both surfaces of the second counter plate portion 425. The leading ends of the ribs 426 in the protruding direction are continuous with the leading ends of the first flange 423 and the second flange 424.

A hole 427 that penetrates in the thickness direction of the web 421 is formed in the width direction (the length direction of the web 421) in the web 421 in the inner portion of the second opposing plate portion 425 on both sides of the second shear reinforcing steel material 42. A plurality are formed at intervals. These hole portions 427, 427... Are configured so that the top concrete portion 43 enters in order to fix the second shear reinforcing steel material 42 and the top concrete portion 43.
In the present embodiment, the two second shear reinforcing steel materials 42 are arranged on the upper side of the lower plate portion 41 with an interval in the length direction.

  The top concrete portion 43 is placed at the site where the culvert 2 is constructed together with the joint concrete portion 51 described later. In the top concrete part 43, reinforcing bars are appropriately arranged. The top slab concrete portion 43 is disposed on both sides in the length direction of the lower plate portion 41 so that the mold frame protrudes above the upper surface of the lower plate portion 41, and is surrounded by the lower plate portion 41 and the mold frame. It is constructed by placing reinforcing bars in the space and placing concrete in this space.

The top concrete portion 43 is provided on the upper side in the vertical direction of the lower plate concrete portion 45 of the lower plate portion 41. Therefore, the two second opposing plate portions 425 and 425 of the second shear reinforcing steel material 42 are not embedded in the top concrete portion 43, and the two second opposing plate portions of the second shear reinforcing steel material 42 are not embedded. A portion between 425 and 425 is embedded in the top concrete portion 43.
In the present embodiment, the reinforcing bars of the lower plate portion 41, the second shear reinforcing steel material 42, and the top plate concrete portion 43 are manufactured as a top plate precast member 48 assembled in advance at a factory or the like and then carried into the site. . Note that the reinforcing bars of the lower plate portion 41, the second shear reinforcement steel material 42, and the top slab concrete portion 43 may be assembled on site without being precast members.

  As shown in FIGS. 5 and 6, the top plate precast member 48 (top plate portion 4) has a first outer shell portion 31 of the side wall portion 3 with respect to the side wall portion 3 arranged on one side in the width direction. The lower edge portion (the lower edge portion of the haunch portion 47) of the lower plate portion 41 on the one end surface in the width direction is disposed in contact with the end portion on the other side in the width direction on the upper end surface. The second opposing plate portions 425 and 425 arranged on one side in the width direction of the two second shear reinforcing steel materials 42 and 42 are two first shear reinforcements on the side wall portion 3 arranged on one side in the width direction. It arrange | positions between the 1st opposing board parts 334 and 334 of the steel materials 33 and 33, and opposes the 1st opposing board parts 334 and 334 at intervals in the length direction. FIG. 5 shows a state in which the top plate portion 4 and the side wall portion 3 disposed on one side in the width direction are joined.

  Similarly, the top plate precast member 48 (top plate portion 4) has a width direction on the upper end surface of the first outer shell portion 31 of the side wall portion 3 with respect to the side wall portion 3 arranged on the other side in the width direction. It arrange | positions so that the lower edge part (lower edge part of the haunch part 47) in the end surface of the width direction other side of the lower board part 41 may be contact | abutted to the edge part of one side. The second opposing plate portions 425 and 425 arranged on the other side in the width direction of the two second shear reinforcing steel materials 42 and 42 are the two first shear reinforcements of the side wall portion 3 arranged on the other side in the width direction. It arrange | positions between the 1st opposing board parts 334 and 334 of the steel materials 33 and 33, and opposes the 1st opposing board parts 334 and 334 at intervals in the length direction.

Further, the horizontal portion 413 a of the second reinforcing bar joint portion 413 of the top plate portion 4 is disposed above the first reinforcing bar joint portion 313 of the second outer shell portion 32 of the side wall portion 3. The vertical portion 413b of the second reinforcing bar joint portion 413 of the top plate portion 4 is arranged on the inner side in the width direction than the first reinforcing bar joint portion 313 of the first outer shell portion 31, and the vicinity of the lower edge portion is the second outer shell portion. It is arrange | positioned inside the width direction rather than the 32 concrete parts 311 (1st outer shell part 31 side).
In addition, arrangement | positioning of the 1st opposing board part 334, the 2nd opposing board part 425, the 1st reinforcement joint part 313, and the 2nd reinforcement joint part 413 may be set suitably. For example, the 1st opposing board part 334 and the 2nd opposing board part 425 may be arrange | positioned alternately.

The upper side of the first outer shell part 31 and the second outer shell part 32 of the pair of side wall parts 3, 3 is above the concrete part 311, and the outer side in the width direction of the concrete part 411 of the lower plate part 41 of the top plate part 4. The part which becomes this becomes the junction part 5 which joins the side wall part 3 and the top plate part 4, and the joining concrete part 51 is cast.
In the joint portion 5, a first counter plate portion 334, a second counter plate portion 425, a first rebar joint portion 313, and a second rebar joint portion 413 are arranged, and these are embedded in the joint concrete portion 51. Yes. The bonded concrete portion 51 is also filled between the first counter plate portion 334 and the second counter plate portion 425.

Next, a method for constructing the culvert 2 according to the present embodiment (a method for joining shear-reinforced steel materials having a steel-concrete composite structure) will be described.
First, as shown in FIG. 7, a bottom plate portion construction step for constructing the bottom plate portion 6 is performed.
Subsequently, as shown in FIG. 8 and FIG. 9, a side wall portion building step for building a pair of side wall portions 3 and 3 is performed.
As shown in FIG. 8, side wall precast members 37 are installed on the side wall connection portions 61 and 61 on both sides in the width direction of the bottom plate portion 6, and the molds are formed on the sides of the second outer shell portions 32 and 32 on both sides in the width direction. Frames 39 and 39 are installed. The molds 39 and 39 serve as molds for the joint portion 5. The second outer shell portion 32 of the side wall precast member 37 may be extended upward so as to be located on the side of the joint portion 5, and may be used in place of the molds 39 and 39.
As shown in FIG. 9, the concrete of the side wall concrete part 34 is laid between the first outer shell part 31 and the second outer shell part 32, and curing is performed for a predetermined period.

Subsequently, as shown in FIG. 10 to FIG. 12, a top plate portion construction step for constructing the top plate portion 4 is performed.
As shown in FIG. 10, a top plate precast member 48 is installed above each of the pair of side wall portions 3, 3, and the top plate portion 4 of the pair of side wall portions 3, 3 is arranged in a region where the joint portion is disposed. Place the joint. At this time, the two second counter plate portions 425 are disposed between the two first counter plate portions 334 so that the first counter plate portion 334 and the second counter plate portion 425 face each other with a predetermined interval. The first shear reinforcement steel material 33 and the second shear reinforcement steel material 42 are arranged in (shear reinforcement steel material installation step).

As shown in FIG. 11, the reinforcement of the top plate part 4 and the joint part 5, and the formwork (not shown) of the top plate part 4 and the joint part 5 are installed. The lower plate portion 41 also serves as a mold frame for the top plate concrete portion 43 of the top plate portion 4. As shown in FIG. 12, the concrete of the top slab concrete portion 43 and the joint concrete portion 51 is placed and cured for a predetermined period (joint concrete placement step).
At this time, concrete is also filled between the first counter plate portion 334 and the second counter plate portion 425 arranged in the joint portion 5.
Thereby, the top plate portion 4 and the joint portion 5 are constructed, and the pair of side wall portions 3 and 3 and the top plate portion 4 are joined by the joint portion 5, and one unit 14 (one bottom plate portion is constructed to construct the culvert 2. 6, a pair of side wall portions 3, 3 disposed above each of both end portions of the bottom plate portion 6, and a single top plate portion disposed above the pair of side wall portions 3, 3 are joined together. ) Is built.
Subsequently, the units 14 adjacent in the length direction are sequentially constructed in the same manner, and the culvert 2 is constructed.
As described above, the bottom plate portion 6 and the pair of side wall portions 3 are used as one unit, and after the units are sequentially constructed in the length direction, the entire top plate 13 may be built by concrete on site. Good.

Next, the operation and effect of the above-described joint structure 1A of the shear-reinforced steel material having the steel-concrete composite structure will be described with reference to the drawings.
In the joint structure 1A of the shear-reinforced steel material of the steel-concrete composite structure according to the above-described embodiment, the first opposing plate portion 334 of the side wall portion 3 and the second opposing plate portion 425 of the top plate portion 4 face each other. It is arranged so as to be embedded in the jointed concrete portion 51. Thereby, the 1st opposing board part 334 and the 2nd opposing board part 425 each fix with the joint concrete part 51, and the 1st opposing board part 334 and the 2nd opposing board part 425 are joined via the joint concrete part 51. Therefore, the first shear reinforcing steel material 33 and the second shear reinforcing steel material 42 can be easily joined.
Further, the first counter plate portion 334 and the second counter plate portion 425 may be disposed so as to face each other, and the first counter plate portion 334 and the second counter plate portion 425 are welded or mechanically joined. There is no need to Thereby, when positioning the 2nd counter plate part 425 with respect to the 1st counter plate part 334, for example, the axis of the 1st counter plate part 334 and the axis of the 2nd counter plate part 425 must be in agreement, etc. Since there are few restrictions, the 1st shear reinforcement steel material 33 and the 2nd shear reinforcement steel material 42 can be joined easily.
As a result, the labor required for joining the first shear reinforcement steel material 33 and the second shear reinforcement steel material 42 can be reduced, and the work period can be shortened. It is possible to eliminate the step of installing the shear reinforcement in the joint portion 5 and to shorten the construction period.
Moreover, the side wall part 3 and the top plate part 4 can be easily joined through the first shear reinforcement steel material 33 and the second shear reinforcement steel material 42 embedded integrally in the joint concrete part 51.
Moreover, since the 1st opposing board part 334 and the 2nd opposing board part 425 can bear the shearing force of a corner part (joining part 5), it is not necessary to provide a shear reinforcement in a corner part.

Further, since the concrete of the joint concrete portion 51 is interposed between the first counter plate portion 334 and the second counter plate portion 425, each of the first counter plate portion 334 and the second counter plate portion 425 is provided. The fixing surface with the joint concrete part 51 can be enlarged.
Further, the first outer shell portion 31, the second outer shell portion 32 of the side wall portion 3, the two first shear reinforcing steel members 33 and 33, and the reinforcing bars of the side wall concrete portion 34 are side wall precast members assembled in advance at a factory or the like. The rebar of the top plate part 4, the second shear reinforcement steel material 42, and the top plate concrete part 43 are pre-assembled top plate precast members 48 assembled in advance at the factory. It is possible to reduce the work at the site by being carried into the site after being manufactured.

Further, the first reinforcing bar 312 of the pair of side wall portions 3 and 3 has a first reinforcing bar joint portion 313, and the second reinforcing bar 412 of the top plate portion 4 has a second reinforcing bar joint portion 413, and The reinforcing bar joint part 313 and the second reinforcing bar joint part 413 are arranged in the joint part 5 and embedded in the joint concrete part 51, whereby the joint part 5 is formed by the first reinforcing bar joint part 313 and the second reinforcing bar joint part 413. The first shear reinforcement steel material 33 and the second shear reinforcement steel material 42 can be firmly joined.
Further, the first counter plate portion 334 and the second counter plate portion 425 are provided with ribs 335 and 426, respectively, so that the first counter plate portion 334 and the second counter plate portion 425 are respectively provided by the ribs 335 and 426. And the joining concrete part 51 can be integrated, and the 1st shear reinforcement steel material 33 and the 2nd shear reinforcement steel material 42 can be joined firmly.

(Other embodiments)
Next, other embodiments will be described with reference to the accompanying drawings, but the same or similar members and parts as those in the first embodiment described above are denoted by the same reference numerals, and description thereof is omitted. A different configuration will be described.

(Second Embodiment)
As shown in FIG. 13, in the joint structure 1B of the shear-reinforced steel material of the steel-concrete composite structure according to the second embodiment, the first opposing plate portion 334B of the first shear-reinforced steel material 33B of the side wall portion 3B penetrates the plate surface. A first through hole 334b is formed. A second through hole 425b penetrating the plate surface is formed in the second opposing plate portion 425B of the second shear reinforcing steel material 42B of the top plate portion 4B. A penetrating rebar 71 is provided that is inserted through both the first through hole 334b and the second through hole 425b and is embedded in the joint concrete portion 51B.
The first through hole 334b and the second through hole 425b are arranged at positions overlapping in the length direction. The first through hole 334b and the second through hole 425b are formed in the first counter plate part 334B and the second counter plate part 425B in advance in a factory or the like.

The penetrating rebar 71 is disposed in a direction extending in the length direction, and is inserted from the length direction into the first through hole 334b and the second through hole 425b. The penetrating rebar 71 is configured not to connect the first counter plate portion 334 and the second counter plate portion 425 even when inserted through the first through hole 334b and the second through hole 425b.
Fixing bodies 711 and 711 are attached to both ends of the penetration reinforcing bar 71. As shown in FIG. 14, the fixing body 711 is formed integrally with the cylindrical tubular portion 712 into which the end of the penetrating rebar 71 is inserted, and the end of the tubular portion 712, and is more than the tubular portion 712. A large-diameter disk portion 713. The cylindrical portion 712 and the disc portion 713 are arranged coaxially. The fixing body 711 is embedded in the joint concrete portion 51 </ b> B together with the penetration reinforcing bar 71.
In the present embodiment, a plurality of first through holes 334b and second through holes 425b are formed, and the penetrating rebar 71 is inserted through each.

  In addition, in the joint structure 1B of the steel-concrete composite structure of the steel-concrete structure according to the second embodiment, a plurality of stud dowels 72 are provided so as to protrude from the plate surface to the first counter plate portion 334B and the second counter plate portion 425B. , 72... Are provided. The stud dowels 72 are provided on both surfaces of the first counter plate portion 334B and the second counter plate portion 425B. The stud dowel 72 is previously joined to the first counter plate portion 334B and the second counter plate portion 425B at a factory or the like.

Further, in the joint structure 1B of the steel-concrete composite structure of the steel-concrete composite structure according to the second embodiment, a restraining member 73 that couples and restrains the two first opposing plate portions 334B and 334B is provided. The restraining member 73 is a long member extending in the length direction, and one end portion in the length direction is a first member disposed on one side in the length direction of the two first shear reinforcing steel members 33B and 33B. The other end portion in the length direction is joined to the edge portion of the shear reinforcement steel material 33B, and the other end portion in the length direction is joined to the edge portion of the first shear reinforcement steel material 33B arranged on the other side in the length direction. The restraining member 73 is joined to the edges of the two first shear reinforcing steel members 33B and 33B, thereby connecting the first opposing plate portions 334 of the two first shear reinforcing steel members 33B and 33B to restrain them. doing.
In the present embodiment, three restraining members 73 are provided. As for these restraining members 73, for example, at least one restraining member 73 is previously attached to the two first shear reinforcing steel materials 33B and 33B at a factory or the like, and the remaining restraining members 73 are second shear reinforcing steel materials 42B, 42B may be attached to the first shear reinforcing steel members 33B and 33B after being incorporated so as to face the first shear reinforcing steel members 33B and 33B.

In the joining method of the shear-reinforced steel material of the steel-concrete composite structure according to the second embodiment, the pair of side wall portions 3B, 3B and the top plate portion 4B are installed in the same position as in the first embodiment, and the joined concrete portion 51B is installed. Before the placement, the penetrating rebar 71 is inserted through the first through hole 334b and the second through hole 425b.
The joint concrete portion 51B is placed, and the penetration reinforcing bar 71, the stud gibber 72, and the restraining member 73 are embedded in the joint concrete portion 51B together with the first counter plate portion 334B and the second counter plate portion 425B.

The joint structure 1B of the shear-reinforced steel material of the steel-concrete composite structure according to the second embodiment has the same effects as those of the first embodiment. The first counter plate 334 is formed with a first through hole 334b, the second counter plate 425 is formed with a second through hole 425b, and the first through hole 334b and the second through hole 425b are formed. Since the penetration rebar 71 inserted through both is embedded in the joint concrete portion 51B, the joint 5 is reinforced by the penetration rebar 71, and the first shear reinforcement steel plate 33B and the second shear reinforcement steel plate 42B are firmly joined. can do.
Further, the front end portion of the penetrating reinforcing bar 71 is connected to the bonded concrete portion 51B and the fixing body 711 to be fixed. Thereby, since the penetration reinforcement 71 is more firmly fixed to the joint concrete part 51B by the fixing body 711, the joint part 5B is further reinforced, and the first shear reinforcement steel plate 33B and the second shear reinforcement steel plate 42B are joined more firmly. Can do.

Further, the stud surfaces 72, 334B and 425B are provided with stud gibels 72, so that the stud dibels 72 allow the first counter plate portion 334B and the second counter plate portion 425B to be connected to each other. The joint concrete portion 51B can be integrated. Thereby, the 1st shear reinforcement steel plate 33B and the 2nd shear reinforcement steel plate 42B can be joined more firmly.
Further, since the two first shear reinforcing steel materials 33B and 33B are restrained by the restraining member 73, the two first opposing plate portions 334B and 334B are also restrained, and the positions of the first opposing plate portions 334B and 334B. Deviation can be prevented.

(Third embodiment)
As shown in FIG. 15, in the joint structure 1C of the shear-reinforced steel material of the steel-concrete composite structure according to the third embodiment, the first shear-reinforced steel material 33C of the side wall portion 3C includes the first outer shell portion 31 and the second outer shell portion. The upper end portions of the first outer shell portion 31 and the second outer shell portion 32 are disposed at substantially the same positions as the upper end portions of the first outer shell portion 31 and the second outer shell portion 32. In the present embodiment, the upper part of the first shear reinforcing steel material 33C corresponds to the first counter plate portion (hereinafter referred to as the first counter plate portion 334C) of the present invention. Ribs 335C are formed on the first counter plate portion 334C.
Further, as shown in FIGS. 15 and 16, the second shear reinforcement steel material 42C of the top plate portion 4C includes a first plate portion 428a that protrudes outward in the width direction from a portion disposed immediately above the lower plate portion 41. And a second plate portion 428b protruding downward from the first plate portion 428a. The combined shape of the first plate portion 428a and the second plate portion 428b is substantially L-shaped when viewed from the length direction. Ribs 426 are formed on the second plate portion 428b. In the present embodiment, the second plate portion 428b of the second shear reinforcing steel material 42C corresponds to a second counter plate portion (hereinafter referred to as a second counter plate portion 425C) of the present invention.

When the pair of side wall portions 3C, 3C and the top plate portion 4C are arranged at positions where they are joined, the second opposing plate portion 425C (second plate portion 428b) is connected to the concrete portion 311 of the first outer shell portion 31C. It is inserted from above with the concrete portion 311 of the second outer shell portion 32C, and faces the first counter plate portion 334C (the upper portion of the first shear reinforcing steel material 33C). The first counter plate portion 334C and the second counter plate portion 425C are embedded in concrete placed between the concrete portion 311 of the first outer shell portion 31C and the concrete portion 311 of the second outer shell portion 32C. Yes.
In the present embodiment, the first opposing plate portion 334C and the second opposing plate portion of the concrete placed between the concrete portion 311 of the first outer shell portion 31C and the concrete portion 311 of the second outer shell portion 32C. The portion where 425C is embedded corresponds to the bonded concrete portion of the present invention (hereinafter referred to as bonded concrete portion 51C).
In the present embodiment, the second shear reinforcing steel plate 42C is disposed, and the first facing plate portion 334C and the second facing plate portion 425C face each other, and then the concrete portion 311 of the first outer shell portion 31C of the side wall portion 3 Concrete is placed between the concrete portion 311 of the second outer shell portion 32C.

  In the joint structure 1C of the shear-reinforced steel material of the steel-concrete composite structure according to the third embodiment, the first opposing plate portion 334C of the first shear-reinforced steel material 33C of the side wall portion 3 is the first outer shell portion 31C and the second outer shell portion 32C. The second opposing plate portion 425C of the second shear reinforcing steel material 42C protrudes downward and enters between the first outer shell portion 31C and the second outer shell portion 32 even if it does not protrude upward. Since the first counter plate portion 334C is opposed to the first counter plate portion 334C in the length direction and the first counter plate portion 334C and the second counter plate portion 425C are embedded in the bonded concrete portion 51C, the same effects as those of the above-described embodiment are obtained. .

(Fourth embodiment)
As shown in FIG. 17, in the steel-concrete composite structure shear-reinforced steel joining structure 1D according to the fourth embodiment, top plate portions 4D are arranged on both sides in the width direction of one side wall portion 3D. The top plate portion 4D is employed in the joining structure of the side wall portion (first structure) 3D and the top plate portion (second structure) 4D joined in a T-shape.

  In the side wall 3D, the first shear reinforcing steel material 33D protrudes upward from the upper ends of the first outer shell 31 and the second outer shell 32, and the first outer shell of the first shear reinforcing steel 33D. Portions protruding upward from the upper ends of the portion 31 and the second outer shell portion 32 are first counter plate portions 334D. The side wall 3D is provided with a first reinforcing bar 312D whose upper side protrudes upward from the concrete portion 311 of the first outer shell portion 31 and the concrete portion 311 of the second outer shell portion 32, respectively. Of the first rebar 312D, the portion protruding upward from each of the concrete portion 311 of the first outer shell portion 31 and the concrete portion 311 of the second outer shell portion 32 is a first rebar joint portion 313D.

The top plate portion 4D has a lower plate portion 41D extending in the width direction and two second shear reinforcing steel materials 42D and 42D arranged on the lower plate portion 41D.
The lower plate portion 41D includes two concrete portions 411D and 411D arranged at intervals in the width direction, and a second rebar 412D provided so as to extend in the width direction and extend over the two concrete portions 411D and 411D. Have. In the second reinforcing bar 412D, the intermediate portion in the width direction is not embedded in any of the two concrete portions 411D and 411D of the lower plate portion 41D. A middle portion in the width direction that is not embedded in any of the two concrete portions 411D and 411D of the lower plate portion 41D of the second rebar 412D is a second rebar joint portion 413D.
A plurality of second reinforcing bars 412D are provided at intervals in the length direction. The distance between the second rebars 412D and 412D adjacent in the length direction is set to a dimension that allows the first shear reinforcing steel material 33D of the side wall 3D to be inserted from below.
2nd shear reinforcement steel materials 42D and 42D are provided so that two concrete parts 411D and 411D of lower board part 41D may be covered. In the present embodiment, the intermediate portion in the width direction (the portion between the two concrete portions 411D and 411D of the lower plate portion 41D) of the second shear reinforcing steel material 42D is the second opposing plate portion (hereinafter referred to as the first plate portion). 2 opposed plate portion 425D).

In the fourth embodiment, two first opposing plate portions 334D of the first shear reinforcement steel material 33D of the side wall portion 3D are arranged between the two concrete portions 411D and 411D in the lower plate portion 41D of the top plate portion 4D. Yes. The two first opposing plate portions 334D are disposed between the second reinforcing bar joints 413D and 413D of the second reinforcing bars 412D and 412D that are adjacent to each other in the length direction between the two concrete portions 411D and 411D, respectively. The two first counter plate portions 334D are arranged so as to sandwich the two second counter plate portions 425D from the length direction, and the two first counter plate portions 334D and the two second counter plate portions 425D have a length. Opposite direction. Note that the number and arrangement of the first counter plate portion 334D and the second counter plate portion 425D, and the presence and arrangement of the first rebar and the second rebar 412 may be set as appropriate.
The first counter plate portion 334D, the second counter plate portion 425D, the first rebar joint portion 313D, and the second rebar joint portion 413D are disposed between and between the two concrete portions 411D, 411D of the lower plate portion 41D of the top plate portion 4D. It is buried in the concrete cast on the upper side. In the present embodiment, the portion between the two concrete portions 411D and 411D of the lower plate portion 41D of the top plate portion 4D and the upper portion thereof is a joint portion 5D between the side wall portion 3D and the top plate portion 4D, and is placed in this portion. The applied concrete corresponds to the bonded concrete portion of the present invention (hereinafter referred to as the bonded concrete portion 51D).

  In the joint structure 1D of the shear-reinforced steel material of the steel-concrete composite structure according to the fourth embodiment, even if the top plate portion 4D is joined to each of both sides of one side wall portion 3D, such as multiple culverts, Since the first counter plate portion 334D and the second counter plate portion 425 face each other, and the first counter plate portion 334D and the second counter plate portion 425 are integrally embedded in the bonded concrete portion 51D, the same as in the above embodiment There is an effect.

(Fifth embodiment)
As shown in FIGS. 18 and 19, the joint structure 1 </ b> E of the steel-concrete composite structure shear reinforcement steel material according to the fifth embodiment includes a side wall portion 3 </ b> E (first structure) and a bottom plate portion 6 </ b> E (second structure). Adopted in the joint structure. 18 shows a form in which the bottom plate portion 6E and the side wall portion 3E are joined in a T shape, and FIG. 19 shows a form in which the bottom plate portion 6E and the side wall portion 3E are joined in an L shape. Yes. In FIG. 18 and FIG. 19, the side wall 3E and the bottom slab 6E are spaced apart in the vertical direction for the sake of explanation, but actually, the lower end of the side wall 3E is the bottom slab 6E. It is in contact with the side wall connecting portion 61E.
As in the first embodiment, two first shear reinforcing steel members 33E and 33E are provided between the first outer shell portion 31 and the second outer shell portion 32 in the side wall portion 3E. The lower ends of the two first shear reinforcing steel materials 33E and 33E are arranged at substantially the same height as the lower ends of the first outer shell 31 and the second outer shell 32. In the present embodiment, the lower portion of the first shear reinforcing steel material 33E corresponds to the first counter plate portion (hereinafter referred to as the first counter plate portion 334E) of the present invention.
The bottom slab portion 6E includes a bottom slab concrete portion 62 extending in the width direction, and two second shear reinforcing steel members 63 whose lower side is embedded in the bottom slab concrete portion 62 and whose upper side protrudes upward from the bottom slab concrete portion 62. . The second shear reinforcing steel material 63 protrudes upward from the side wall connecting part 61E to which the side wall part 3E of the bottom slab concrete part 62 is connected. The second shear reinforcing steel material 63 is formed in a plate shape whose plate surface faces the length direction. In the present embodiment, a portion of the second shear reinforcing steel material 63 that protrudes upward from the bottom slab concrete portion 62 corresponds to a second counter plate portion (hereinafter referred to as a second counter plate portion 631) of the present invention. .

  In the fifth embodiment, when the side wall portion 3E and the bottom plate portion 6E are arranged at positions where they are joined, the second counter plate portions 631, 631 of the bottom plate portion 6E are two first counter plate portions 334E of the side wall portion 3E. , 334E, the first counter plate portion 334E and the second counter plate portion 631 face each other in the length direction. The first counter plate portions 334E and 334E and the second counter plate portions 631 and 631 are integrally embedded in the side wall concrete portion 34E. In the present embodiment, the lower side of the side wall concrete portion 34E (the portion in which the first opposed plate portions 334E and 334E and the second opposed plate portions 631 and 631 are embedded) is a bonded concrete portion (hereinafter referred to as a bonded concrete portion 51E). ). The first counter plate portion 334E and the second counter plate portion 631 are joined by being embedded in the joint concrete portion 51E.

  In the joint structure 1E of the shear-reinforced steel material of the steel-concrete composite structure according to the fifth embodiment, even in the joint structure of the bottom plate portion 6E and the side wall portion 3E, the first opposed plate portion 334E and the second opposed plate portion 631 are joined concrete. Since it is embedded in the part 51E, the same effects as those of the above-described embodiment can be obtained.

(Sixth embodiment)
As shown in FIG. 20, the joint structure 1F of the shear reinforcement steel material of the steel concrete composite structure by 6th Embodiment is employ | adopted as the joining structure of the two beam parts 8 and 8 arrange | positioned on the same straight line. In the sixth embodiment, the direction in which the two beam portions 8, 8 extend is the length direction, and the horizontal direction orthogonal to the length direction is the width direction. The two beam portions 8 and 8 are joined to each other in the lengthwise direction through the joint portion 5F. The two beam portions 8 and 8 are connected to the first beam portion (first structure) 81 and the first beam portion. Assume that two beam portions (second structure) 82 are provided, and the first beam portion 81 is disposed on one side of the second beam portion 82 in the length direction.

  The first beam portion 81 has a first beam concrete portion 811 extending in the length direction, an intermediate portion in the length direction embedded in the first beam concrete portion 811, and both end portions in the length direction at the first beam concrete portion 811. 1st shear reinforcement steel material 812 which protrudes in the both sides of a length direction from. The first shear reinforcing steel material 812 is made of I-type steel. The portion of the first shear reinforcing steel member 812 that protrudes from the first beam concrete portion 811 to the other side in the length direction is the first counter plate portion of the present invention (hereinafter referred to as the first counter plate portion 813). It corresponds to. The first beam portion 81 may be a precast member manufactured in advance in a factory or the like, or may be constructed on site.

  The second beam portion 82 includes a second beam concrete portion 821 extending in the length direction, an intermediate portion in the length direction embedded in the second beam concrete portion 821, and both end portions in the length direction at the second beam concrete portion 821. A second shear reinforcing steel material 822 protruding from both sides in the length direction. The second shear reinforcing steel material 822 is made of I-type steel. A portion of the second shear reinforcing steel material 822 that protrudes from the second beam concrete portion 821 to one side in the length direction is a second opposing plate portion of the present invention (hereinafter referred to as a second opposing plate portion 823). It corresponds to. The 2nd beam part 82 is good also as a precast member manufactured beforehand at the factory etc., and may be built on the spot.

When the first beam portion 81 and the second beam portion 82 are arranged at a position where they are joined, the first counter plate portion 813 and the second counter plate portion 823 overlap in the width direction, and the first beam concrete portion 811 The 2nd beam concrete part 821 is arrange | positioned in the state spaced apart in the length direction. A portion between the first beam concrete portion 811 and the second beam concrete portion 821 that are separated in the length direction becomes a joint portion 5F that joins the first beam portion 81 and the second beam portion 82.
The joint portion 5F is configured such that the joint concrete portion 51F is placed, and the first counter plate portion 813 and the second counter plate portion 823 are integrally embedded in the joint concrete portion 51F.
The 1st opposing board part 813 and the 2nd opposing board part 823 are joined by being embed | buried under the joining concrete part 51F.
The first beam portion 81 is provided with a first reinforcing bar protruding from the first beam concrete portion 811 to the other side in the length direction, and the second beam portion 82 is provided on one side in the length direction from the second beam concrete portion 821. The 2nd reinforcing bar which protrudes in is provided, and the 1st reinforcing bar and the 2nd reinforcing bar may be arranged at joint part 5F, and may be embed | buried under joint concrete part 51F.

  In the joint structure 1F of the shear-reinforced steel material of the steel-concrete composite structure according to the sixth embodiment, even in the joint structure of the first beam portion 81 and the second beam portion 82 arranged on the same straight line, the first opposing plate portion 813 is used. Since it is embedded in the joint concrete portion 51F in a state where the second opposing plate portion 823 is opposed to the second opposing plate portion 823, the same effects as those of the above embodiment are obtained.

As mentioned above, although embodiment of the joining structure of the shear reinforcement steel material of the steel concrete composite structure and the joining method of the shear reinforcement steel material of the steel concrete composite structure by this invention was demonstrated, this invention is not limited to said embodiment. It can be changed as appropriate without departing from the spirit of the invention.
For example, in the above-described embodiment, the first shear reinforcing steel material 33 and the second shear reinforcing steel material 42 are I-type steel, but the first opposing plate portion and the second opposing plate arranged so that the plate surfaces thereof face each other. As long as it has a plate portion, it may be a shape steel other than the I-shaped steel or a steel material such as a steel plate.

  Further, in the above embodiment, the first counter plate portion 334 and the second counter plate portion 425 are arranged with a space therebetween, and the first counter plate portion 334 and the second counter plate portion 425 are joined together. Although the concrete of the concrete portion 51 is interposed, the first counter plate portion 334 and the second counter plate portion 425 are disposed so as to contact each other, and between the first counter plate portion 334 and the second counter plate portion 425. May be a form in which the concrete of the joint concrete portion 51 does not intervene.

Moreover, in said embodiment, although the side wall part 3 and the top plate part 4 are half precast members, you may construct | place and construct concrete on the spot, without using the member of precast concrete.
In the above embodiment, the first reinforcing bar 312 is provided on the first reinforcing bar 312 of the side wall 3, the second reinforcing bar 412 is provided on the second reinforcing bar 412 of the top plate part 4, and Although the 1 rebar joint part 313 and the 2nd rebar joint part 413 are embed | buried in the joint concrete part 51, the 1st rebar joint part 313 and the 2nd rebar joint part 413 are not provided, but the joint concrete part 51 The structure which is not embedded may be sufficient.

In the second embodiment, the penetration reinforcing bar 71, the stud gibber 72, and the restraining member 73 are all provided in the joint 5 </ b> B between the side wall 3 </ b> B and the top plate part 4 </ b> B. Alternatively, one or two of the restraining members 73 may be appropriately provided.
For example, as in the joint structure 1G of the shear-reinforced steel material having the steel-concrete composite structure shown in FIG. And the 1st through-hole 334b and the 2nd through-hole 425b are not formed in the 2nd opposing board part 425G of the 2nd shear reinforcement steel material 42G, and the penetration rebar 71 does not need to be provided. In addition, when the 1st through-hole 334b and the 2nd through-hole 425b are provided and the penetration rebar 71 is penetrated, these numbers and positions may be set suitably. In the second embodiment, the fixing body 711 is connected to the tip of the penetrating reinforcing bar 71, but the fixing body 711 may not be connected.

  Further, for example, in the joint portion 5H between the side wall portion 3H and the top plate portion 4H as in the joint structure 1H of the shear reinforcement steel material having a steel-concrete composite structure shown in FIG. 22, the first opposing plate of the first shear reinforcement steel material 33H. The first through hole 334b and the second through hole 425b are not formed in the portion 334H and the second counter plate portion 425H of the second shear reinforcement steel material 42H, the through reinforcing bar 71 is not provided, and two first counter plate portions 334H and 334H may not be restrained by the restraining member 73. In addition, when the restraining member 73 which restrains the 1st opposing board part 334B is provided, the number, position, and form of the restraining member 73 may be set suitably.

  Further, in the second embodiment, the stud gibber 72 is provided on the first counter plate portion 334B and the second counter plate portion 425B, but it may not be provided. Moreover, the stud dowel 72 may be provided only in any one of the 1st opposing board part 334B and the 2nd opposing board part 425B. When the stud dowel 72 is provided, the arrangement and number of the stud dowels 72 may be set as appropriate. In addition, the stud dowel 72 may be provided on only one side of the first counter plate portion 334B and the second counter plate portion 425B. Moreover, the stud gibber may be provided in the flange 332,333 of the steel plate 334a connected to the upper end part of the 1st opposing board part 334B, or the 1st shear reinforcement steel material 33B. Moreover, the stud gibber may be provided in the flanges 423 and 424 of the second shear reinforcing steel material 42B.

  Further, in the above embodiment, the first counter plate portion 334 and the second counter plate portion 425 are provided with the ribs 335 and 426, but the ribs 335 and 426 may not be provided. Moreover, the ribs 335 and 426 may be provided only in one of the first counter plate portion 334 and the second counter plate portion 425. The ribs 335 and 426 may be provided on only one side of the first counter plate portion 334 and the second counter plate portion 425 instead of both surfaces. The positions and number of the ribs 335 and 426 may be set as appropriate.

In the above embodiment, two first opposing plate portions 334 are provided on one side wall portion 3, but one or more first opposing plate portions 334 are provided on one side wall portion 3. May be.
Further, in the above-described embodiment, two second counter plate portions 425 are provided in one top plate portion 4, but one or three or more second counter plate portions 425 are provided in one top plate portion 4. It may be provided.

  Moreover, in said 1st-4th embodiment, although the haunch part 47 is provided, it does not need to be provided. Moreover, although the haunch part 47 is integrally formed with the lower plate part 41 of the top plate parts 4, 4 </ b> B to 4 </ b> D with precast concrete, it may be formed in the field.

  In the above embodiment, the joining structure of the side wall portion 3 and the top plate portion 4 of the culvert 2, the joining structure of the side wall portion 3 and the bottom plate portion 6 of the culvert 2, and the joining structure of the beam portions 8 and 8 of the structure are used. The steel-concrete composite structure of the steel-concrete composite structure according to the present invention adopts the joint structure of the shear reinforcement steel material, the joint structure of the pillar part and the beam part of the structure, the joint structure of the bottom plate part and the wall part of the retaining wall, etc. You may employ | adopt the joining structure of the shear reinforcement steel material of the steel concrete composite structure which concerns on this invention for the joining structure of structures other than the above.

1A to 1H Joint structure of shear-reinforced steel of steel-concrete composite structure 2 Calvert 3, 3B to 3E, 3G, 3H Side wall (first structure)
4,4B-4D, 4G, 4H Top plate part (second structure)
6, 6E Bottom plate part 31 First outer shell part (precast concrete member)
32 Second shell part (precast concrete member)
33, 33B to 33E, 33G, 33H, 812 First shear reinforcing steel 41 Lower plate (precast concrete member)
42, 42B-42D, 42G, 42H, 63, 822 Second shear reinforcement steel material 47 Hunch part 51, 51B-51H Bonded concrete part 71 Penetration rebar 72 Stud gibber
73 Restraining member 312 First rebar 313 First rebar joint 334, 334B to 334E, 334G, 813 First opposing plate (opposing plate)
334b First through hole 335, 335C rib (stiffener)
412 2nd rebar 413 2nd rebar joint part 425,425B-425D, 425G, 631,823 2nd opposing board part (opposing board part)
425b 2nd through-hole 425c 1st board part 425d 2nd board part 426 Rib (stiffening material)
711 Fixing body

Claims (19)

  In the steel-concrete composite structure, the first shear reinforcement steel material and the second shear reinforcement steel material, each capable of bearing a shearing force, are arranged so that the plate surfaces of the plate-like opposing plate portions provided in a part thereof face each other. A bonded structure of shear-reinforced steel material of a steel-concrete composite structure, characterized in that each of the opposing plate portions is embedded in a bonded concrete portion.   2. The joint structure of a shear-reinforced steel material having a steel-concrete composite structure according to claim 1, wherein the first shear-reinforced steel material and the second shear-reinforced steel material are not mechanically joined.   The joint structure of the steel-reinforced concrete composite structure according to claim 1 or 2, wherein a precast concrete member is attached to at least one of the first shear-reinforced steel material and the second shear-reinforced steel material. . A first through hole penetrating the plate surface is formed in the counter plate portion of the first shear reinforcing steel material,
A second through hole penetrating the plate surface is formed in the counter plate portion of the second shear reinforcing steel material,
The steel-concrete composite structure according to any one of claims 1 to 3, wherein a penetration reinforcing bar penetrating both the first through hole and the second through hole is embedded in the joint concrete portion. Shear-reinforced steel joint structure.   The joint structure of the steel-concrete composite structure of the steel-concrete composite structure according to claim 4, wherein a fixing body that is fixed to the concrete of the joint concrete portion is connected to a tip portion of the penetration reinforcing bar. At least one of the opposing plate portion of the first shear reinforcing steel material and the opposing plate portion of the second shear reinforcing steel material is provided with a diver.
The shear structure of steel-reinforced concrete composite structure according to any one of claims 1 to 5, wherein the gibber is embedded in the joint concrete part. At least one of the opposing plate portion of the first shear reinforcing steel material and the opposing plate portion of the second shear reinforcing steel material is provided with a stiffener.
The said stiffener is embed | buried in the said joint concrete part, The joining structure of the shear reinforcement steel material of the steel concrete composite structure as described in any one of Claim 1 thru | or 6 characterized by the above-mentioned. At least one of the first shear reinforcing steel material and the second shear reinforcing steel material is provided with a plurality of shear reinforcing steel materials,
The shear reinforcing steel material of a plurality of the shear reinforcing steel materials according to any one of claims 1 to 7, wherein the opposing plate portions are constrained by a restraining member. Joining structure.   The shear reinforcement steel material of the steel concrete composite structure according to any one of claims 1 to 8, wherein the first shear reinforcement steel material and the second shear reinforcement steel material are joined from directions intersecting each other. Bonding structure.   The opposing plate portion of at least one of the first shear reinforcing steel material and the second shear reinforcing steel material extends to the side facing the other shear reinforcing steel material in the intersecting direction. The joint structure of the shear reinforcement steel material of the steel concrete composite structure of Claim 9 to do.   The steel-concrete composite structure according to any one of claims 1 to 8, wherein the first shear-reinforced steel material and the second shear-reinforced steel material are joined from opposite directions on the same straight line. Shear-reinforced steel joint structure. The first shear reinforcing steel material is provided in a first structure of a steel concrete composite structure,
12. The joining of the shear-reinforced steel material of the steel-concrete composite structure according to claim 1, wherein the second shear-reinforced steel material is provided in a second structure body of the steel-concrete composite structure. Construction. The first structure has a first reinforcing bar, the second structure has a second reinforcing bar,
The said 1st reinforcing bar and the said 2nd reinforcing bar are integrally embed | buried under the said joining concrete part, The joining structure of the shear reinforcement steel material of the steel concrete composite structure of Claim 12 characterized by the above-mentioned. The first structure is a pillar portion of a structure,
The said 2nd structure is a beam part of the said structure, The joining structure of the shear reinforcement steel material of the steel concrete composite structure of Claim 12 or 13 characterized by the above-mentioned. The first structure is a side wall of a culvert;
The said 2nd structure is a top plate part of the said culvert, The joining structure of the shear reinforcement steel material of the steel concrete composite structure of Claim 12 or 13 characterized by the above-mentioned. The first structure is a bottom plate portion of a retaining wall;
The said 2nd structure is a wall part of the said retaining wall, The joining structure of the shear reinforcement steel material of the steel concrete composite structure of Claim 12 or 13 characterized by the above-mentioned.   The at least one of a 1st structure and a 2nd structure has a haunch part joined with the other, The shear reinforcement steel material of the steel concrete composite structure as described in any one of Claims 12 thru | or 16 characterized by the above-mentioned. Junction structure. Each of the first shear reinforcing steel material and the second shear reinforcing steel material is a shape steel,
The counter plate portion of the first shear reinforcing steel material and the counter plate portion of the second shear reinforcing steel material are webs of the shape steel, respectively. Of steel-reinforced concrete composite shear-reinforced steel. In the joining method of the shear-reinforced steel material of the steel-concrete composite structure in which the first shear-reinforced steel material and the second shear-reinforced steel material each capable of bearing a shear force in the steel-concrete composite structure are joined,
A shear reinforcing steel material installation step of arranging the first shear reinforcing steel material and the second shear reinforcing steel material so that plate-like opposing plate portions provided in a part thereof face each other;
A joining concrete part placing step of embedding the opposing plate part of the first shear reinforcing steel material and the opposing plate part of the second shear reinforcing steel material integrally in the joining concrete part after the shear reinforcing steel material installation process; A method for joining a shear-reinforced steel material having a steel-concrete composite structure.

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