KR100951097B1 - Slab and subgrade external wall structure and method for constructing underground slab and subgrade external wall, bracket - Google Patents

Abstract

According to the present invention, after constructing each layer slab of the underground structure, the outer outer wall contacting the earthquake wall is constructed to construct a plywood wall, and the opening portion penetrates up and down in the slab portion embedded in the underground outer wall, that is, the buried slab area. The slab is constructed by installing a steel wale structure that can simultaneously serve as a formwork for supporting loads and a permanent structure for supporting a load, and is formed by the steel wale structure in a state in which slabs of all layers are constructed. Construction method of slab and plywood of underground structures for continuous plying of plywood walls using openings as vertical reinforcement for floor reinforcement and concrete placing passage, slab and plywood structures constructed by this construction method, and slab and plywood construction It is about a dragon bracket.

According to the present invention, the problem of the installation of the edge beam can be solved by eliminating the existing edge beam, in particular, the continuous reinforcement between the vertical reinforcement of the vertical reinforcement of the basement outer wall and the interlayer continuous casting of concrete can be smoothly performed using the steel As the wale structure supports the load, the stiffness of the entire slab including the buried slab is maximized, while the embedded RC beam reinforcement frame which is embedded as a permanent structure inside the buried slab, which is the slab part embedded by the basement outer wall, is used. After the curing, the embedded RC beam rebar supports the deck slab, so that a smooth load transmission system in the horizontal and vertical directions can be realized, thus securing the structural safety of the slab and the plywood wall. have.

Description

Slab and subgrade external wall structure and method for constructing underground slab and subgrade external wall, bracket}

The present invention relates to a slab, a plywood structure and a construction method of an underground structure, and more particularly, after constructing an interlayer slab of an underground structure, constructing an underground outer wall in contact with an earthquake wall and constructing it as a plywood wall and by this construction method. The present invention relates to a slab and plywood structure and a supporting bracket to be constructed.

In general, there are two ways to build underground structures.

After constructing the earthquake on the ground where the underground structure is constructed, install the temporary facility to support the earthquake while excavating the ground, take out all the earth and sand, and build the structure from the bottom floor, After the construction of the first-floor structure, using the structure as a retaining member for the earthquake, the reverse casting method is to construct the structure while drilling the ground from the top to the bottom.

In recent years, underground construction has been increasingly intensified in order to maximize land use. In particular, when the construction is carried out by the net pouring method, not only the construction of cracks due to the risk of earthquake collapse or the settlement of nearby buildings, but also visually unstable construction Due to various problems such as long periods of time, the reverse casting method has been widely applied in recent years.

The reverse casting method is a method of constructing the ground structure from the ground floor step by step when constructing the underground structure, so that the construction of the underground structure and the ground structure can be carried out at the same time, and the floor of the ground floor can be used as a workshop so that a separate perforated plate is provided. There is an advantage that is not necessary.

Such a reverse casting method involves placing concrete slabs and beams on the ground while the ground is stopped (concrete on grade), and excavating the ground to some extent, picking the ground, placing the clubs and installing the formwork, and placing the concrete. (Form on supporting) and the method of placing concrete by suspending form support girder for form support on the upper concrete slab which is pre-constructed instead of erecting a circle for supporting form (unsupported reversal suspension form Construction method).

In addition, as a method widely used in recent years, formwork girders (which are used as permanent structures as H-beam steel beams or dismantled after construction as construction structures) are supported by using a movable assembly bracket which can be disassembled to a frame pillar, and There is a method of placing slab and beam concrete after supporting and installing formwork for interlayer slab and beam construction by using support girder.

On the other hand, reinforcement construction is usually provided with a reinforced concrete perimeter beam that acts as a strip or a joining girder at the outer boundary where the earth wall and the slab meet each other. Going upstairs from the lower floor, the underground outer wall is smoothly constructed inside the retaining wall to complete the underground plywood.

Here, with reference to the accompanying drawings for the formwork and work for the slab and rim beam construction of the basement layer according to the prior art as follows.

1 is a cross-sectional view showing the installation state of the formwork for the construction of the conventional slab and rim beam, showing the state of curing of the concrete in the formwork installation state, Figure 2 shows the state of the construction of the conventional slab and rim beam is completed The cross-sectional view shows a state in which the formwork is dismantled after curing of concrete.

These figures are sectional views in the position where the support girders are installed for supporting the deck plate.

In FIG. 1, reference numeral 2 denotes an H-pile that is a thumb pile vertically constructed in the retaining wall, that is, a vertical steel beam.

Usually, there are two types of soil walls (Soil Cement Wall) and CIP (Cast In-Place Pile) as main heating walls, and they usually use H-pile (2) as thumb pile. The pile 2 serves as a vertical bending member that directly supports the earth pressure and the hydraulic pressure of the rear surface.

For the construction of the rim beam 17 in the prior art after the construction of the retaining wall (1) to the gulting work first, after casting the discarded concrete (3) to support the formwork by installing the copper club (4).

Here, the lumber 5 which is arranged long in the transverse direction with respect to the longitudinal direction of the rim beam 17 to be constructed is supported by a plurality of copper wheels 4, on the rim beam 5, plywood for molding The formwork 6 is horizontally arranged and supported, and the horizontal plywood formwork, ie, the formwork lower plate 6, is fixed and vertically supported by a plywood formwork (not shown) for forming the side beams.

In addition, as the slab construction structure, reference numeral 7 denotes a support girder which is a steel golbo structure, and reference numeral 15 denotes a deck plate supported by the support girder 7.

As the support girder 7, H-shaped steel is generally used, one end of which is supported by a copper wheel 4, a form lower plate 6, and the like, and an embedded plate 8 is welded and / or at one end of the support girder 7. It is vertically coupled by the fixing bracket 9a and the fastening member 9b.

And, Figure 1 is a longitudinal cross-sectional view at the position where the support girder (7) is installed, plywood formwork for forming the side beams, that is, the formwork side plate is not shown, this formwork side plate is the edge beam 17 to be constructed It is installed along both longitudinal sides of the embedded plate 8 in a long direction, which forms a side of the rim beam forming space with the embedded plate 8 at the end of each support girder 7.

In addition, the square space of the cross-section formed by the molding space in which the frame for the concrete is poured, that is, the retaining wall (1), the formwork lower plate (6), the embedded plate (8) and the formwork side plate not shown In the frame beam forming space, the reinforcing bar 11 and the stub reinforcing bar 12 are installed in the longitudinal direction, and the vertical reinforcing bar 19 embedded in the underground plywood space is connected up and down to install the reinforcement. After removing a part of the wall, the stud 13, which is a shear connection member, is welded to the flange surface of the H-pile 2 embedded in the retaining wall 1 in the space.

In addition, the stud 14, which is a shear connection member, is welded to the embedded plate 8 in the edge beam forming space, and the studs 13 and 14 installed as described above are embedded in the edge beam concrete, and these are H -They are constructed to increase the mutual binding force between the pile (2) and the rim beam 17, and the rim beam 17 and the embedded plate (8).

As such, after installing all the structures such as the formwork for the construction of the slab (16) and the rim beam (17), when the slab and beam concrete is poured, the concrete is poured together in the rim beam forming space to form the rim beam (17) do.

Then, after the concrete is cured, the copper bar (4) and the lumber (5), plywood formwork (form lower plate and side plate) (6), etc. are dismantled, the steel girders support girder (7) and embedded plate (8) is permanent It will be used as a structure.

After going down to the lower floor, the above operation is repeated for each floor, and the girder beam connecting the interlayer slab and each layer slab and the earthen wall is constructed step by step, and the reverse construction of the interlayer slab and the rim beam is performed for all basement floors. Upon completion, the base wall wall formwork is installed and concrete construction, and the plywood (retaining wall) netting construction is performed so that the rim beam is not exposed.

The net construction at this time is to be constructed in the order of the lower floor to the upper floor.

Normally, the basement cladding is completed after the interlayer slab and the rim beam are installed, and then install the formwork for exterior wall construction on the inner side of the retaining wall, and then cast concrete inside the formwork to finish the construction of the cladding wall and the outer wall so that the rim beam is embedded. In addition, the construction of the underground plywood is carried out in the manner of the netting construction of the outer wall while going up from the lower floor to the upper floor after the construction of the interlayer slab and the rim beam.

FIG. 3 is a cross-sectional view showing an example of a smooth construction of the underground plywood, which is a cross-sectional view taken at a position where the support girder is not installed, that is, an intermediate position between the support girder and the support girder.

After the construction of the slab 16 and the rim beam 17 is completed, a formwork for exterior wall construction (not shown) is installed inside the retaining wall 1, and concrete is poured into the form space to construct the outer wall 18. The construction of the underground plywood is done.

On the other hand, in the process of constructing the slab and plywood of the underground structure, according to the prior art shown in Figures 1 and 2, and 3 has the following problems.

As a problem due to the construction of the rim beam, as described above, by using the general plywood formwork (6) and the copper barrier (4), a lot of work disruptions occur due to delayed earthwork work due to the installation of the copper bar and occasional formwork destruction during concrete pouring, The formwork is complicated to install, which leads to problems of poor workability and cost increase.

In particular, when the copper barrier 4 is used, support on the soft ground is unstable and dismantlement is impossible unless the strength of concrete is maintained above a certain level. There is a problem that can not but delay the air.

In addition, temporary materials such as dongbari should be moved to the lower floor after the excavation after installation to the outside of the gulto workshop during the construction of reverse casting, and this should be repeated for the construction of each floor. There is this.

In addition, the cost and time required for transporting and reassembling the club are not only economically unfavorable, but also the labor-intensive labor shortage of all workers makes the use of copper club cost-effective. Makes it difficult.

In addition, there is a problem that the woodworking work for the formwork by the rim beam construction should be carried out in the middle.

In particular, the deck slab (16) is installed by installing the deck plate (15) for the slab construction, while the rim beam construction requires the work of wood plywood formwork for formwork work, so woodworking work Personnel should be intermittent.

As such, the work cost increases as well as the labor cost of the woodworker in addition to the ironworker, as well as the efficiency of manpower input has a problem that is greatly reduced.

In addition, there is a problem of excessive waste of stirrups and reinforcing bars according to the construction of the rim beams, waste of materials due to excessive use of connecting bars, and complicated reinforcing and assembly of reinforcing bars for rim reinforcement. Time is required, causing air delays and increasing construction costs.

In addition, as the slab 16 is pre-constructed and the outer wall 18 is post-constructed, a joint surface is generated between the upper and lower surfaces of the rim beam 17 and the outer wall 18. It is pointed out that, in order to solve this leak problem, repair work that requires the injection of epoxy between the joint surface after construction is required.

In order to solve the problems of the conventional rim beam construction, various construction techniques that minimize or omit the rim beam has been devised or invented by the present inventors (Utility Model Registration No. 370107, Utility Model Registration No. 370135, Utility Registered Model No. 381303, Registered Utility Model No. 385376, Registered Patent No. 634726).

The above technique minimizes the edge beams, minimizes the amount of rebar and formwork required for the construction of the edge beams, shortens the air, and solves the problems caused by the existing edge beam constructions.

Or by connecting the interlayer slab directly to the wall of the barrier to solve the problem of the conventional rim beam construction by eliminating the rim beam at all.

On the other hand, in the construction of the reverse beam construction of the rim beam or the underground structure without the rim beam, the remaining upper and lower plywood parts between the rim beam or the slab (when the rim beam is omitted) are later constructed.

That is, the slab and the rim beam (which may be omitted), which are the interlayer horizontal structures of each layer, are first constructed to support the wall, and then the outer wall is integrally formed with the wall to construct the plywood wall.

At this time, the slab or rim beam is pre-installed to be settled directly to the retaining wall to support external force such as earth pressure, and after the outer wall is installed, the plywood is constructed by embedding the slab or rim beam on the outer wall. A concrete sleeve must be installed on the pre-installed slab or rim beam, and additional dowel bars are installed to integrate the outer walls of the upper and lower layers because of the difficulty of continuous reinforcement between the layers of the outer reinforcing bars. Should be.

The sleeve is a passage for vertically penetrating the slab portion (hereinafter referred to as 'buried slab') or the rim beam embedded in the outer wall, the filling for forming the sleeve in the embedded slab or rim beam area during the construction of the slab, rim beam The pipe is pre-verted vertically and then concrete is poured outward so that the sleeve penetrates up and down by the inner space of the filling pipe where the concrete is not poured.

However, in the construction of plywood walls, the casting of concrete through the sleeve is not only difficult for the construction itself but also makes it difficult for the concrete to be filled tightly. This reverse oscillation joint acts as a cause of deteriorating structural performance due to leakage of the building.

When the groundwater is introduced through the inverted joint, the inflowed groundwater causes corrosion of the reinforcing steel and deterioration of the concrete, resulting in poor durability of the structure.

Therefore, whether the rim beam is constructed or not, the underground plywood concrete placing structure such as the existing sleeve needs to be further improved.

Therefore, the present inventors, as a technology that can solve all the problems described above, the use of the copper bar and the edge beam can be eliminated, and the technology that does not need a separate sleeve construction for concrete laying underground walls outside the patent registration No. 634726 It was suggested through.

In this case, a technique for continuously installing a plurality of grating support frames between the retaining wall and the slab space is proposed for eliminating the rim beam and eliminating the sleeve construction.

However, the method of installing the grating support frame as described above had the following problems.

First of all, the factory-worked grating support frame is installed in the field between the earthquake wall and the slab space, that is, the buried slab area. However, the size and volume of the grating support frame is very large, so the installation is difficult. .

In the actual installation process, two people hold the grating support frame by hand and install it in the right position. Since the volume and weight are difficult for two people to work, it may require more manpower during actual construction, labor costs and work. It is true that there are still some problems that need to be improved, such as excessive time and poor work efficiency.

In addition, since the grating support frame is continuously installed along the buried slab area, a large amount of steel (amount required for manufacturing the grating support frame and the number of grating support frames used) is required, which causes excessive construction cost. come.

In addition, since the grating support frame is installed over the entire section of the outer wall thickness, that is, the outer wall width, the grating support frame adds to the problem of overweight and deterioration of economic efficiency.

In addition, it is impossible to install in the corner portion of the building because it is installed by attaching a large grating support frame of the size standardized and factory manufactured in succession along the entire section in the field.

Therefore, a separate method should be considered in the corner portion, and if necessary, it is necessary to cut and use the factory-made grating support frame in the field.

This can be pointed out as a problem due to the difficulty of work, deterioration of work efficiency, material loss.

In addition, since the plate constituting the grating support frame is in the form of a flat plate, there is a problem of lowering cross-sectional efficiency and lowering economic efficiency.

Next, another type of technology is disclosed in Patent No.722198, which does not require the use of a copper bar and can remove the rim beam, and does not require a separate sleeve construction for placing an underground outer wall concrete.

This is because the exposed formwork is formed so that openings are formed in the embedded slab buried in the basement outer wall while the interlayer slab in the building is constructed to support the retaining wall. It is a method of forming the opening by pouring concrete more than the slab thickness.

In this construction method, since the openings penetrating up and down the embedded slab are formed by embedding dies after slab concrete is poured, there is an advantage that the construction of the basement outer wall can be easily proceeded by the openings.

However, this method has the following fatal disadvantages.

4 and 5 are views for explaining the problems according to the prior art, Figure 4 is a plan view using a built-in formwork of the open plate structure, Figure 5 is a line 'A-A' of Figure 4 It is a cross section taken along.

As shown in FIG. 3, the constructed reinforced concrete slab S is a buried slab S1 which is a portion embedded in the basement outer wall 111 while exposed to the earth wall 100 and an exposed slab that is exposed outside the basement outer wall. It is divided into (S2), the embedding die 121 is disposed at predetermined intervals in the embedded slab area to form the opening OP after slab concrete pouring.

In addition, when the construction of the slab (S) is completed, the construction of the plywood wall proceeds using the opening OP formed in the embedded slab S1.

Once, the edge beam is omitted, so the problem caused by the construction of the edge beam is solved and the problem of the use of the copper bar is solved since the copper bar is not used, but the opening OP formed by the embedding die 121 penetrates the embedded slab vertically. Compared to its sleeve, the shape has only been changed from circular to various other squares (butterfly openings are shown as examples).

That is, using the embedding die 121, the cross-sectional area of the existing sleeve is changed and enlarged into a square as disclosed in the circle, and through the enlarged opening OP formed by the rectangular embedding die, in the basement outer wall 111 Interlayer continuous reinforcement of the vertical reinforcing bars (112, 113) embedded in and out of the concrete interlayer continuous casting is only to enable more smoothly than when using a conventional circular sleeve.

Such a structure may have a desired effect in that concrete continuous pouring of the basement outer wall 111 and the filling of a closed room of the concrete may be performed, but above all, an empty space called an opening OP in the buried slab S1, namely, Due to the enlarged upper and lower through passages are formed, there is a fatal disadvantage that becomes very weak in terms of the structural strength of the buried slab (S1).

In particular, the embedding die 121 is a non-structural material (simple formwork of an open plate structure) made of a flat plate, and is merely a formwork for forming the opening OP, so the earth pressure from the retaining wall 100 to the slab (S). It does not perform all the load supporting roles such as transmission, earth pressure support, lateral pressure support and axial force support.

The opening OP of the cross-sectional area enlarged in the embedded slab S1 joined to the barrier wall 100 in view of the interlayer slab S structurally supporting the barrier wall 100 during the reverse construction. There is a fatal disadvantage that the outer wall 111 is very vulnerable in terms of stability of the structure before construction (because it becomes a form of a large hole in the buried slab structurally very weak during the action of the pneumatic pressure).

Although the patent suggests a butterfly-shaped opening as an example of a preferred shape to facilitate the arrangement of the inner and outer vertical reinforcing bars 112 and 113, the opening is more than a simple deformation that greatly enlarges the conventional sleeve cross-sectional area (buy die to load such as earth pressure). It is difficult to expect a structural effect, and since the formwork does not play any load structurally, it is pointed out that fatal problems and accidents may occur in terms of structural stability during construction.

In addition, as can be seen in Figure 4, buried dies 121 are disposed at a predetermined interval in the buried slab area, wherein the size of each buried die is a vertical reinforcing bar of the basement outer wall (111) that is arranged in two layers in and out ( The size of the opening OP that can penetrate through 112 and 113 at the same time should be determined as a size that can be molded.

When both the inner and outer vertical reinforcing bars 112 and 113 have to pass through the opening OP, the embedding die 121 is substantially in the width direction (thickness direction) of the outer wall 111 and the width direction of the embedding slab S1 during actual construction. It must be installed over the entire section, and thus the length of the opening OP can be long in the width direction of the outer wall, as shown in FIG. 5.

In such a structure, there must be considerable structural reinforcement as the earth pressure acts largely between the opening OP and the opening.

That is, in actual construction, in a situation where a considerable length of left and right spaces exist in the construction, the pillar construction such as the hoop back 114 to compensate for the structural weakness in the section between the opening OP and the opening A significant amount of rebar reinforcement should be made in accordance with the city's reinforcement levels and reinforcement shapes.

By using the simple formwork of the open plate structure, which is a non-structural material, an opening is formed over the entire widthwise section of the outer wall, which is disadvantageous to buckling in the section between the opening and the opening (the buckling length of the section between the openings is fragile), During the celebration, the strength is reduced and the column needs to be reinforced.

In particular, as the sections between the openings act as pole pillars during the action of the earth pressure, the structure becomes very fragile, and there are problems such as shear cracking during construction, thereby exposing many problems in safety.

This will be described in more detail with reference to the drawings.

6 and 7 are views for explaining the problem according to the prior art, Figure 6 is a plan view, Figure 7 is a cross-sectional view taken along the line 'B-B' of FIG.

FIG. 6 shows a state after slab closing, that is, a state in which both the slab (S) constructions of the regions (I) and (II) are completed, and FIG. 7 shows a state before the slab closing, that is, the slab construction is performed only for the region (I). It is shown.

As shown in FIG. 6, when constructing a square structure underground structure, as is well known, actual slab concrete construction in each layer is generally performed by sequentially dividing (I) and (II) regions.

That is, when the slab (S) is constructed, concrete is cast in the area (I), and then the slab formwork structure 141 is installed in the area (II) of the same layer. After the work is carried out, the slab concrete is post-cast in the area (II) (slab closure).

This is a general work order that is actually applied in the construction of slabs of each layer, and the air shortening can be performed by performing the excavation work before the construction of the slab concrete in the area (II).

However, structural problems do not occur after slab concrete is poured in the area (II), but before slab closing, that is, until the slab concrete in the area (II) is poured, as shown in FIGS. 6 and 7, The pre-installed slab must support the earth pressure completely.

As a result, before the slab concrete in the region (II) is poured, in particular during the excavation work in the region (I), the excavation pressure is greatly generated, which may cause shear cracking in the section between the opening OP and the opening.

4 and 5, when the simple formwork 121 of the open plate structure is used and the length of the opening OP becomes longer in the width direction of the outer wall in the embedded slab S1 (each opening opens most of the outer wall width). ), The additional risk of collapse during shear cracking is due to the large amount of excavation pressure during the additional excavation of the slab precasting region ((I) region) without the slab closing.

Therefore, the present invention has been devised in view of the above points, and the use of the existing clubs is not necessary, as well as the rim beam can be eliminated. The purpose is to provide slab and plywood structures and construction methods of underground structures that can maximize the stiffness of the entire slab including embedded slabs, and to support the brackets for the slab and plywood construction.

In addition, the present invention by providing an embedded RC beam reinforcement frame to be embedded as a permanent structure in the interior of the embedded slab which is part of the slab buried by the outer wall to enable the embedded RC beam reinforcement frame to support the deck slab after curing, Deck slab → embedded RC beam rebar frame → Secure vertical load transfer system from supporting bracket to thumb pile (H-pile); transverse pressure → plywood → embedded slab including embedded RC beam rebar frame → There are other objectives to provide slab and plywood structures and construction methods for underground structures that can facilitate load transfer, such as securing horizontal load transfer system leading to tech slabs, and supporting brackets for slab and ply wall construction. .

The slab and plywood construction method of the underground structure provided by the present invention in order to achieve the above object is to install a support bracket to form the formwork of the embedded slab and the supporting role of the following steel wale structure in the slab construction when the slab construction of each layer And disposing a steel wale structure spaced apart along the buried slab area on the support bracket to serve as a formwork for forming an opening of the buried slab, and at the same time serving as a load supporting, distributing, and transferring material from the retaining wall; And reinforcing the embedded RC beam reinforcing frame along the buried slab area on the support bracket, which is formed in a shape including the external reinforcement and serves to smoothly transfer the load, and forms a slab to be connected to the support bracket. After installing the structure, the inner space of the steel wale structure Constructing the slab by placing concrete in the entire slab area except the slab construction, and when the slab construction of the entire layer is completed, the opening formed by the inner space of the steel wale structure is divided into the vertical reinforcing bars of the basement wall and the concrete casting of the basement outer wall. It is characterized by consisting of a step for the continuous construction of the subterranean plywood wall using the passageway for.

In addition, the slab and plywood structure of the underground structure provided by the present invention in order to achieve the above object is a support bracket which is installed on the earth wall to serve as the formwork of the embedded slab and the supporting role of the steel wale structure, and on the support bracket Jang reinforcing bars arranged along the buried slab area, wire mesh formwork installed on the reinforcing bar slab, slab construction formwork for constructing the slab area connected with the buried slab area, and the formwork for forming the opening of the buried slab. It serves to support the load, distribute and transfer the load from the retaining wall, and is composed of a steel wale structure spaced apart along the buried slab area on the support bracket, and a horizontal reinforcement and an outer reinforcement. Perform the purchase on the support bracket An embedded RC beam reinforcement frame is disposed along the slab area, and concrete is poured into the entire slab area except the inner space of the steel wale structure to complete the slab construction, and the opening formed by the inner space of the steel wale structure. It is used as a passage for vertical reinforcing bar reinforcement and concrete placing for the basement outer wall.

In addition, the slab and plywood construction support bracket of the underground structure provided by the present invention in order to achieve the above object is used in the construction of the slab and plywood construction of the underground structure, and performs the role of formwork of the embedded slab and the support role of the steel wale structure. It consists of a supporting bracket body installed on the earthen wall, and an auxiliary bracket detachably coupled to the front end of the supporting bracket body, so that the auxiliary bracket can be detached from the supporting bracket body before slaying the slab after curing the slab. Characterized in that consisting of.

The slab and plywood structure and construction method of the underground structure provided by the present invention, and the support bracket for the slab and plywood construction has the following advantages.

First, as the existing edge beams are deleted, the problems caused by the edge beam installation can be solved. In particular, the steel wale structure is loaded while the continuous reinforcement of the vertical reinforcement between floors and the interlayer continuous casting of concrete can be smoothly carried out using an opening. By supporting the stiffness of the slab including the embedded slab can be maximized.

Secondly, in the case of the steel wale structure, while serving as a forming mold (form) for forming the openings, the steel wale structure simultaneously serves as a structure for supporting loads and distributed support around the openings in the embedded slab, and thus a slab which is a reverse support structure of the retaining wall. The rigidity of can be maximized.

Third, the steel wale structure can be manufactured in a small size and light weight while having a simple structure. As the size of the wale steel structure does not change according to the retaining wall thickness, the steel wale structure is modularized by processing in the factory and welding assembly. Can mass produce.

Therefore, it is very advantageous in terms of cost than when using a conventional grating support frame, which is complicated in structure and takes a lot of steel, and has many advantages such as improved workability, reduced work time, and reduced labor costs.

In particular, the steel wale structure is less steel used in the production compared to the conventional grating support frame, manufacturing cost is relatively low, unlike the grating support frame is installed at intervals apart from each other without continuous installation, so the number of use in the field Because of this, the overall construction cost can be reduced.

Fourth, the steel wale structure is not limited in the construction position, such as constraints on the use of the corner portion of the building, it can solve all the conventional problems associated with this.

Fifth, by installing embedded RC beam reinforcement frame, which is a permanent structure, in the embedded slab buried by the outer wall of the basement, and allowing the embedded RC beam reinforcement frame to support the deck slab, the vertical load transfer system (deck slab) → embedded RC beam reinforcing frame → support bracket → thumb pile) and horizontal load transfer system (lateral soil pressure → plywood → embedded slab → tech slab including embedded RC beam reinforcement frame). Seamless load transfer systems can improve structural safety.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the slab and plywood construction method of the underground structure provided by the present invention, after constructing each layer slab of the underground structure and constructing the basement outer wall contacting the earth wall, the construction of the slab portion, that is, the slab portion embedded in the basement outer wall The slab is constructed by installing a steel wale structure that can serve as a formwork for forming openings penetrating up and down in the buried slab area, and can simultaneously serve as a permanent structure for supporting loads. In the construction state, the opening formed by the steel wale structure is used as a vertical reinforcing layer reinforcement of the basement outer wall and concrete casting passageway to continuously install the plywood wall.

In the present invention, as the existing edge beams are deleted, the problems caused by the edge beam installation can be solved, and the continuous reinforcement of the vertical reinforcement interlayers of the basement outer walls and the interlayer continuous casting of concrete can be smoothly performed using the openings, as well as the steel. Whale structure performs load supporting role such as earth pressure transfer, earth pressure support, lateral pressure support, axial force support, etc. from the retaining wall to the slab in the embedded slab, and the vertical and vertical directions are made by the embedded RC provided in the embedded slab. By inducing smooth load transfer, the stiffness of the entire slab including the embedded slab can be maximized.

The construction method of the present invention will be described in more detail with reference to the accompanying drawings.

8 is a process diagram of the construction process according to the present invention, Figure 9 is a perspective view showing a state in which the steel wale structure 130, the embedded RC beam 150 is installed in the buried slab (S1) region according to the present invention , FIG. 10 shows that the support bracket 122 is installed on the H-pile 101 of the retaining wall 100, and the reinforcing bar 123, the wire mesh formwork 124, the steel wale structure 130, and the mes on the support bracket. It is a top view which shows the state which installed the standing RC beam 150 and the support angle tube 125.

11 is a sectional view taken in a position where the H-pile 101 of the earthen wall 100 is installed, showing a state in which the construction of the slab S is completed.

Here, reference numeral 111 denotes an outer wall in the state where concrete is poured.

In addition, Figure 12 is a view showing the reinforcement state of the vertical reinforcing bars (112, 113) in the plywood construction process after the slab (S) construction in the construction process according to the present invention, Figure 13 is viewed from the 'C' direction in FIG. Figure showing the reinforcement state of the vertical reinforcing bars (112, 113).

Here, the reference numeral 100 denotes a barrier wall, and the present invention is applicable to both the CIP or SCW in which the H-pile 101 is used as the barrier wall. Hereinafter, in the present specification, these are referred to as "soil walls" without being separated. Collectively.

Referring to FIG. 8, the overall construction process is briefly described as follows.

Construct the retaining wall along the boundary of the building to be constructed, construct the framed pillar (not shown) in the inner ground (S110), and then proceed with the dig of the predetermined depth by the first part of the upper part of the retaining wall and the framed pillar. To be exposed (S120).

Subsequently, the construction of the first floor slab (S130), and when the construction of the first floor slab is completed, the secondary slab (S140) after the slab of the lower floor to work the same (S150).

After continuing to go down to the lower floors by repeating the construction of the above-mentioned pit and slab step by step construction all the slabs of all floors (S160), after the completion of the slab construction work of all basement floors, the bottom wall from the bottom floor going up to the top floor The basement outer wall is smoothly constructed inside to complete the basement wall (retaining wall) (S170).

When the plywood nets are constructed, it is possible to fill the closed room of the concrete, and in the case of the netta joint, the gap can be minimized compared to the reverse oscillating joint by filling the closed room of the concrete.

Of course, it is possible to divide the entire slab area of the copper layer and sequentially construct the slab of the copper layer according to the divided area, as shown in Figs. 6 and 7 at the time of slab construction of each layer. Lower excavation may be carried out prior to slab consolidation, ie slab construction in other areas of the same layer.

In the construction of each floor as above, the slab (S), which is a horizontal interlayer structure, the slab is pre-constructed after the construction so as to directly support the earth wall 100, and this process is repeatedly carried out to the basement floor, and then the earth wall The basement outer wall 111 is integrally formed with the 100 to construct an underground sump wall consisting of the earth barrier wall 100 and the basement outer wall 111 (see FIG. 11).

Here, when constructing each layer slab (S), the slab portion (hereinafter referred to as "buried slab") (S1) buried in the basement outer wall 111, as shown in Figure 9 to Figure 11 to the steel wale structure ( 130) and after installing the embedded RC beam reinforcement frame 150 will be installed.

At this time, the steel wale structure 130 basically serves as a form for forming the opening (OP) of the buried slab (S1).

The opening OP of each layer slab S formed by the steel wale structure 130 in the buried slab S1 is the interlayer continuous reinforcement of the basement outer wall vertical reinforcement 113 and the interlayer continuous of the basement outer wall 111 concrete. It is a top and bottom passage for pouring.

That is, the continuous smooth construction of the basement outer wall 111 is possible through the opening OP.

In addition, in the present invention, the steel wale structure 130 is a permanent structure that is embedded in the embedded slab S1 after field construction, and serves as a formwork for forming the opening OP, and the embedded slab after construction of the slab S ( S1) simultaneously serves as a load supporting structure such as earth pressure support, side pressure support, axial force support, and earth pressure transfer to the slab transmitted from the retaining wall 100.

That is, the steel wale structure 130 is manufactured and installed to complement the structure and its rigidity so as to serve as a simple formwork, as well as the load supporting structure.

The steel wale structure is to be manufactured in the factory and provided to the site, and the installation of the steel wale structure produced at the time of the slab construction of each layer at a predetermined position of the site and then proceed with the subsequent construction work.

The steel wale structure is manufactured by using a steel plate or angle member (L-shaped steel), a channel member (c-shaped steel), etc., as will be described later, and may be produced by mixing them, or a rectangular frame structure as a whole. Can be.

At this time, after the slab construction, especially before the construction of the plywood is structurally designed and manufactured so as to have a rigid enough to withstand the load applied through the concrete from the earth wall.

In the case of the conventional grating support frame, the steel of the present invention in consideration of the disadvantage that the steel volume is excessive during manufacturing, and thus the cost is increased when using it, and that the limitation occurs when using the corner portion of the building. The wale structure is relatively small and in itself manufactured to be rigid enough to support the earth pressure load, and is spaced apart at predetermined intervals rather than being continuously installed along the buried slab area during field installation. .

That is, the steel wale structure 130 is not disposed continuously along the buried slab S1 area, but is spaced at a predetermined interval so that only part of the steel wale structure 130 is provided for the entire buried slab section.

In particular, the width of the steel wale structure 130, the width in the direction extending toward the slab has a relatively small width compared to the width of the buried slab (S1) made of a width corresponding to the thickness of the basement outer wall.

This is to secure the seat for the installation of the embedded RC beam reinforcement frame 150 in the interior of the embedded slab (S1) and to have an appropriate size to favor the earth pressure resistance.

Accordingly, unlike the case of the existing formwork, the steel wale structure 130, unlike having a width almost close to the width of the basement outer wall, that is, almost close to the width of the buried slab S1 in order to penetrate two rows of vertical rebars. ) Has a relatively small width compared to the width of the embedded slab (S1), it is possible to install the embedded RC beam reinforcement frame 150 in the area within the embedded slab (S1) secured thereby.

At this time, the two vertical reinforcing bars used for framing the basement outer wall, that is, the outer vertical reinforcing bars 113 serving as the tensile reinforcing bars are penetrated through the space of the steel wale structure 130 and serve as compressed reinforcing bars. The inner vertical reinforcement 112 is connected and reinforced using a dowel reinforcement 115 installed through the embedded RC beam reinforcing frame 150 in the buried slab S1.

Here, the embedded RC beam reinforcement frame 150 is used to reinforce the overall structural rigidity of the slab portion, it can facilitate the load transfer to the side and the slab to which the earth pressure acts.

The embedded RC beam reinforcement frame 150 extends along the longitudinal direction, that is, along the basement outer wall in the secured area in the embedded slab S1 (area secured due to the reduced width of the steel wale structure). It consists of a plurality of horizontal reinforcing bars 151 disposed and the outer reinforcing bars 152 tying the circumferences of the horizontal reinforcing bars 151 at appropriate intervals.

Accordingly, the embedded RC beam reinforcement frame 150 serves to facilitate the vertical load transfer to the deck slab → embedded RC beam reinforcement frame → support bracket → thumb pile (H-pile), and It can play a role of smoothing the horizontal load transfer from lateral earth pressure to plywood to embedded slab including embedded RC beams.

In addition, in the case of the embedded RC beam reinforcement frame 150 serves to facilitate the load transfer to provide a more economic and efficient construction.

For example, after pouring concrete to build a slab, the support angle tube 125 supports the slab for a period of time before or after curing, if there is no embedded RC beam rebar 150, the slab The construction of the basement floor should be continued while leaving the support angle tube 125 intact until it is fully cured and exhibits structural rigidity. Finally, the base layer 125 cannot be reused and the lower level is used while using the new support angle tube 125. There is a disadvantage in terms of economic feasibility because construction has to be continued.

In the present invention, since the role of the support angle tube 125 can be replaced by the embedded RC beam reinforcement frame 150, embedded RC beam reinforcement frame for a certain period of time after curing or curing some degree even without the support angle tube 125 ( Since 150) can support the slab, the support angle tube 125, which was used after the construction of one floor, can be reused during the construction of the next downstairs, which is advantageous in terms of economy.

In Figure 12 you can see an example of using the support angle tube 125, which was used in the upper floor after construction is currently used in the lower floor under construction.

The construction and use of the steel whale structure and the embedded RC beam rebar are described in more detail below.

First, at the time of construction of each basement slab S including the ground floor slab of the underground structure, the supporting means serving as the formwork of the embedded slab and the supporting role of the steel wale structure 130 in the embedded slab S1 area. It is installed on the retaining wall 100, and installs the formwork structure 141 for slab construction to be connected to the support means.

More specifically, as shown in Figs. 9 to 11, the wall of the retaining wall at the position where the H-pile 101 is installed so that the flange surface of each H-pile 101 of the retaining wall 100 is exposed to the outside. The surface is partly replaced, and the support brackets 122 are welded to the flange surfaces of the exposed H-piles 101, respectively.

At this time, the support bracket 122 having an inverted triangular structure may be fixedly installed on the H-files 101. For example, an angle member (L-shaped steel) may be inverted triangular structure on each of the H-files 101. It can be fixed to configure the support bracket (122).

Here, in the case of the support bracket 122, it has a length extending further inward than the width of the basement outer wall 111, that is, while supporting the area of the buried slab (S1) and before the slab curing or curing the formwork ( 141 has a sufficient length to support the temporary support base angle tube 125 for supporting.

In this case, since a part of the end of the base bracket 122 (the part supporting the base angle tube) is exposed outside the outer wall in the state where the basement outer wall 111 is completely constructed, a separate post work to remove it through a work such as welding. This is necessary and, in the end, efficiency may be reduced in terms of workability and workability.

In order to solve this problem, in the present invention, the auxiliary bracket 153 detachable from the support bracket 122 is provided to remove the auxiliary bracket 153 leaving only the support bracket 122 main body after curing the slab and the embedded slab S1. By doing so, it is possible to eliminate the cumbersome post-work.

That is, the support bracket 122 is composed of a support bracket body having an inverted triangular structure woven from an angle member, and an auxiliary bracket 153 coupled to the front end portion of the support bracket body by a fastening structure such as a bolt, and a slab and a buried body. After curing the slab (S1) by the auxiliary bracket 153 can be easily removed from the base bracket body, it is possible to solve the problem of exposure to the base bracket as before.

Subsequently, the reinforcing bar 123, the wire mesh formwork 124, the support angle tube (or the support angle material) 125, the steel wale structure 130, and the embedded RC beam in the buried slab (S1) area above the support bracket 122. Install the reinforcing frame 150.

That is, after supporting the joist reinforcement 123 in a plurality of rows laterally on the support bracket in a plurality of rows so as to be spread simultaneously on the adjacent support brackets 122 along the buried slab S1 area, the wire mesh type above the joist reinforcement 123. The formwork 124 is installed, and the support angle tube 125 or the support angle material for supporting the edge portion of the formwork structure 141 for building a slab (exposure slab), such as a deck plate, is installed on the tip end of the support bracket 122. Let's do it.

At this time, the support angle tube 125 or the support angle material is installed long and supported horizontally so as to be covered on the adjacent support brackets 122 at the same time.

Then, in order to enable a smooth load transfer after the slab curing, the embedded RC beam reinforcing frame 150 is installed on the wire mesh formwork 124.

Here, the embedded RC beam reinforcement frame 150 is a reinforcing frame for forming the embedded RC beam, the embedded RC beam reinforcement frame 150 is the adjacent support bracket 122 along the buried slab (S1) region Install in a structure that spans at the same time.
For example, a plurality of horizontal reinforcing bars 150 are arranged in a form extending side by side along the underground outer wall in the area secured in the buried slab S1, and the periphery of the horizontal reinforcing bars 150 is disposed on the outer reinforcing bars 152. When the appropriate intervals are tied to the embedded RC beam reinforcement frame 150 is completed, as will be described later, when the concrete is poured into the slab area on the deck plate and the wire mesh formwork region, except the inner space of the steel wale structure 130, At this time, concrete is poured into the embedded RC beam reinforcement frame 150.

The wire mesh formwork 124 is a formwork commonly referred to as metal rib lath, and is a formwork made by placing ribs on a wire mesh lath, and is a formwork currently used in a net formwork method.

During construction, the wire mesh formwork 124 is fixed by welding the reinforcing bar 123 or the like or fixed with an iron wire or the like.

Then, after supporting the edge of the formwork structure 141 over the support angle tube 125 or the support angle material, in the embedded slab (S1) region of the steel wale structure 130 manufactured in a rectangular frame structure along the embedded slab region The wire mesh formwork 124 is installed to be supported at a predetermined interval.

Thereafter, a work of appropriately reinforcing the reinforcing bar is performed around the steel wale structure 130 in the buried slab S1 region.

In addition, as a reinforcing bar connecting the upper and lower floors to the inside of the basement outer wall, the dowel bar 115 is disposed in the form of vertically penetrating the buried slab S1 region.

This is because the vertical reinforcing bars 113, which are connected to the dowel reinforcing bars 115 on the inner side, are located on the compression side, unlike the vertical reinforcing bars reinforcing bars in the form of penetrating outwards. It is possible to improve workability and economic efficiency by broadening the spacing at intervals of 3 to 5 times.

At the time of reinforcement of the inner vertical reinforcing bars, some of the inner vertical reinforcing bars bind together to the dowel and horizontal reinforcement bars and the embedded RC beam reinforcement frame, and the rest of the sections in which the dorsal reinforcing bars are not reinforced are bound only to the horizontal reinforcing bars.

The dowel reinforcement 115 is a reinforcing bar (wire binding) together with the inner vertical reinforcing bars 112 and the horizontal reinforcing bars 116, which are compressed reinforcing bar in the reinforcement process in the plywood, but in the buried slab area of the ground floor slab Dowel reinforcement 115 is installed at the same interval as the vertical reinforcement 112, because it becomes the tension-side reinforcement (see Fig. 13).

Thus, the base bracket 122 and the long wire reinforcement 123, the wire mesh formwork 124, steel wale structure 130, the support angle pipe 125, embedded RC beam reinforcement frame 150, formwork structure 141 And all the reinforcing bars and dowel reinforcing bars 115 in the embedded slab (S1), and slab reinforcement work for reinforcing the upper and lower bars in the exposed slab area on the deck plate. When all is completed, the slab construction is completed by pouring concrete into the surrounding wire mesh formwork area (buying slab area) and the deck plate slab area (deck slab area) except for the inner space of the steel wale structure 130.

As described above, after the slab S of one layer is constructed, the slab of each layer is constructed in the same manner while descending to the lower layer as described above.

When the construction of each layer slab (S) is completed, the remaining portion of the steel wale structure 130, except the inner space is filled with concrete to form a slab, the slab is embedded buried in the underground outer wall 111 after construction of the plywood wall Part S1 and the exposed slab S2 exposed outside the basement outer wall (deck slab part constructed with deck plates) are divided.

In the buried slab S1 of each layer, the inner space of the steel wale structure 130 forms an opening OP because concrete is not poured, and the opening OP is formed in the basement outer wall 111 during the plywood construction. It can be used as a concrete pouring and filling passage for placing concrete for the concrete, and also can be used as a passage where the interlayer vertical reinforcing bars 113 are installed, and thus, vertical reinforcing bars 113 of the basement outer wall 111 through the opening OP. ) It is possible to perform the continuous continuous placement of interlayer continuous reinforcement and concrete.

Since the opening OP of the embedded slab S1 is sufficiently secured after the construction of the slab S, continuous reinforcement between the vertical reinforcing bars 113 of the basement outer wall 111 and the continuous inter-concrete flooring are possible through the opening. The outer wall 111 is constructed as one underground plywood in contact with the earth barrier wall 100 while increasing the interlayer integrity.

In the construction of the basement outer wall 111, the outer vertical reinforcing bars 113, which are tensile reinforcing bars, are continuously intercalated between layers so as to pass through the opening OP of the buried slab S1, and the upper and lower layer dowel reinforcing bars in the space in the basement outer wall (115). Inner vertical reinforcing bars 112, horizontal reinforcing bars 116 connected to the) and other inner vertical reinforcing bars bound to and supported by the horizontal reinforcing bars 116, and after installing the basement wall formwork, the concrete is poured, Vertical reinforcing bars (112, 113), dowel reinforcement (115), horizontal reinforcing bars (116), buried slab (S1) is made in such a way that all buried in the basement outer wall (111).

Of course, since concrete must be poured through the inner space of the steel wale structure 130, that is, the opening OP, when the concrete is placed, the wire mesh formwork located in the inner space of the steel wale structure is cut and removed.

In case of reinforcement of the basement outer wall, the inner vertical reinforcing bars 112, which are compressed reinforcing bars, are connected to each dowel reinforcing bars 115 installed in the buried slab S1 of the ground slab of the ground floor. Only a part of the) to the dowel reinforcement 115, the remaining part is connected to the horizontal reinforcing bars 116, respectively.

Due to the characteristic of the moment during earth action, the tensile force acts on the outer vertical reinforcement 113 and the compressive force acts on the inner vertical reinforcement 112, so that the outer vertical reinforcement 113, which becomes the tensile reinforcement, can resist the tensile force. ) Through the interlayer continuous reinforcement (outer vertical reinforcement = through reinforcing bar), and the inner vertical reinforcing bar 112, which becomes a compressed reinforcing bar, the dowel reinforcing bars 115 and horizontal reinforcing bars (118) vertically buried in the buried slab (S1) Binding simply to) to work.

And, because the buried RC beam reinforcement frame 150 is installed inside the embedded slab (S1), after the slab curing, it is possible to smoothly transfer the load, so that the structural rigidity during the earth pressure action or the slab side load action This can be secured.

In the present invention, the dowel reinforcement 115 is used as a fixing reinforcing bar for fixing the inner vertical reinforcing bar 112, not the connecting reinforcing bar structurally connecting the upper and lower layers, the interval between which easy to fix the vertical reinforcing bar 112 It is buried in the embedded slab S1 in consideration.

Since the interval of the dowel reinforcement 115 is different from the interval of the inner vertical reinforcement 112 except in the case of the first floor above the ground, the inner vertical reinforcement 112 is replaced with the horizontal reinforcement 112 in the remaining section where the dowel reinforcement is not installed. Bind to and support

Meanwhile, FIG. 14 is a view showing various embodiments of the steel wale structure according to the present invention.

As shown, the steel wale structure 130 is manufactured in a rectangular frame structure made by welding the front member 131, the rear member 132, both side members (133a, 133b) in a rectangular shape by mutual welding.

In this case, the intermediate member 134 is installed between the front member 131 and the rear member 132 to have a structure partitioned into one space, two spaces, three spaces, ..., n spaces. In the overall outer shape, the width is shorter than the left and right lengths so as to have a short buckling length. In this case, when the width is relatively short, the buckling length is shortened, so that the buckling allowable axial load becomes large, which is advantageous for earth pressure resistance.

In the installation of the steel wale structure 130, the width of the steel wale structure to be used is 50% or less with respect to the width of the embedded slab S (= width of the basement outer wall), more preferably 25 to It is preferable to make it into 50% of range.

Here, when the width of the steel wale structure 130 is less than 25% of the width of the buried slab S1, it is impossible to secure a sufficient area of the opening OP, so that the reinforcing bars of the basement outer wall 111, that is, the outside Interlayer reinforcement of the side vertical reinforcement 113 is difficult, there is a difficulty in using as a concrete pouring passage.

In addition, when the width of the steel wale structure 130 exceeds 50% of the width of the buried slab S1, the area of the opening OP may be largely secured, but the buried slab ( It is not preferable because S1) is structurally weak and there is a possibility that shear cracking may occur due to the excavation pressure action in the region between the openings OP.

In addition, in manufacturing the steel wale structure 130 of the present invention, each member is possible to use a flat plate, but in the case of the side member (133a, 133b) and the intermediate member 134 to secure sufficient rigidity and increase the strength As shown in FIG. 15, it is preferable to use an angle member (L-shaped steel), a channel member (c-shaped steel), and a bent section plate in addition to the flat plate.

In addition, a diagonal reinforcement member 135 may be fixedly installed in the inner space (each inner space) of the rectangular frame in the stealth wale structure 130.

FIG. 16 is a view showing a construction state of openings according to the construction using the steel wale structure in the present invention. Slab concrete construction includes (I) and (II) In case of sequential construction and dividing into (S) area, additional excavation work in (I) area is performed before slab (S) closing, that is, before slab concrete in (II) area is placed, so that a large amount of excavation pressure is applied to embedded slab (S1). Even if it acts on), the steel wale structure 130 can sufficiently support the load resistance and earth pressure as the load bearing structure is sufficiently distributed, and the section between the openings OP has sufficient strength against the earth pressure. The occurrence of shear cracks as in the prior art can be prevented.

In addition, in the present invention, since the width of the opening OP is 50% or less with respect to the total width (thickness) of the outer wall 111, the opening is partially formed at the entire width of the outer wall. Structure performance of steel castings is not increased, and the load capacity is large and favorable for flat soil pressure, and it is not necessary to reinforce the same amount of reinforcing bar in the section between openings. This will be. In the section between the openings, hoop back muscles are unnecessary and can be installed as general back muscles.

In addition, since the steel wale structure 130 itself used in the present invention has a short width and the length of the side members 133a, 133b and the intermediate member 134 is short, there is an advantage in excellent structural performance and efficiency, in particular steel wale The short buckling length in the structure makes it possible to maximize the stiffness of the entire slab including the embedded slab S1 due to its excellent resistance axial force and rigidity (large axial load capacity and favorable to earth pressure).

In addition, since the steel wale structure 130 used in the present invention is small in size and light in weight, the workability is improved, and the installation of the steel wale structure is a partial installation spaced apart from the continuous installation. There are advantages such as reduction (reduced number of uses) and volume cost reduction, work time reduction and labor cost reduction.

1 is a cross-sectional view showing the installation state of the formwork for the construction of the slab and the rim beam according to the prior art

2 is a cross-sectional view showing a state in which the construction of the slab and the rim beam according to the prior art is completed

3 is a sectional view showing an example of a state in which the reverse construction of the underground plywood is made;

4 and 5 is a view for explaining the problem according to the prior art, Figure 4 is a plan view using a built-in formwork of open plate structure, Figure 5 is taken along the line 'A-A' of Figure 4 Cross-section

6 and 7 are diagrams for explaining a problem according to the prior art, Figure 6 is a plan view, Figure 7 is a cross-sectional view taken along the line 'B-B' of FIG.

8 is a process chart of the construction process according to the present invention

9 is a perspective view showing a state in which the steel wale structure and the embedded RC beam reinforcement frame is installed in the buried slab area according to the present invention;

Figure 10 is a plan view of the state installed the reinforcement bracket, wire mesh formwork, steel wale structure, embedded RC beam reinforcement frame, support angle tube on the support bracket after installing the support bracket on the H- pile of the earth wall in the present invention

11 is a cross-sectional view of the installation position of the H-pile of the retaining wall in the present invention

12 is a view showing the reinforcement state of the vertical rebar in the plywood construction process after the slab construction in the construction process according to the present invention

FIG. 13 is a view illustrating a reinforcement state of vertical rebars viewed from a direction 'C' in FIG. 12.

14 illustrates various embodiments of a steel wale structure in accordance with the present invention.

15 is a cross-sectional view showing several examples of the plate used as the side member and the intermediate member in the steel wale structure according to the present invention

16 is a view showing a construction state of the opening in the present invention

<Explanation of symbols for the main parts of the drawings>

100: retaining wall 101: H- pile

110: underground plywood 111: underground outer wall

112: inside vertical bar 113: outside vertical bar

115: Dowel rebar 116: horizontal rebar

121: purchase die 122: support bracket

123: Jangbar rebar 124: wire mesh formwork

125: support angle tube 130: steel wale structure

131: front member 132: rear member

133a, 133b: side member 134: intermediate member

135: reinforcing member

141: formwork for the slab construction (deck plate)

150: embedded RC beam rebar frame 151: horizontal rebar

152: outer reinforcement 153: auxiliary bracket

OP: opening S: slab

S1: embedded slab S2: exposed slab

Claims (11)

Installing a support bracket 122 to the earth wall 100 to serve as a formwork of the embedded slab and a support role of the steel whale structure 130 as a slab (S) for each layer construction; At the same time as the formwork for forming the opening of the buried slab S1 and the steel whale structure 130, which performs the load supporting, dispersing, and transferring roles from the retaining wall 100, the buried slab S1 on the support bracket 122. ) Spaced apart along the area; Recessed slab (S1) area on the support bracket 122 has a buried RC beam reinforcement frame 150, which consists of a horizontal reinforcement 151 and the outer reinforcement 152, which serves to smoothly transfer loads Step along the back; After installing the slab construction formwork 141 to be connected to the support bracket 122, the slab (S) by placing concrete in the entire slab (S) area excluding the internal space of the steel wale structure 130 Construction step; When the construction of the slab (S) of the entire layer is completed, the opening formed by the inner space of the steel wale structure 130 as a passageway for the concrete reinforcement of the vertical reinforcement interlayer reinforcement of the basement outer wall 111 and the basement outer wall 111 Using a step of successive construction of the subterranean wall using the interlayer; Slab and plywood construction method of the underground structure comprising a. The method according to claim 1, wherein in the step of installing the support bracket 122, a plurality of columns of reinforcing bar 123 along the buried slab (S1) on the support bracket 122, the wire mesh on the reinforcing bar 123 After installing the formwork 124, above the tip of the support bracket 122, characterized in that the support angle tube 125 or a support angle member for supporting the edge of the slab construction formwork structure 141, characterized in that for installing Slab and plywood construction method of underground structure. The method of claim 1, wherein the width of the steel wale structure 130 is 25 to 50% of the width of the buried slab S1 in installing the steel wale structure 130 in the buried slab S1 region. Slab and plywood construction method of the underground structure characterized in that part installation. According to any one of claims 1 to 3, The steel wale structure 130 is the front member 131, the rear member 132, both side members (133a, 133b) is fixed in a rectangular frame structure internal space Slab and plywood construction method of the underground structure, characterized in that it is made to have. The method of claim 4, wherein the steel wale structure 130 is an intermediate member 134 for partitioning the inner space between the front member 131 and the rear member 132 is further fixed by the intermediate member 134 Slab and plywood construction method of the underground structure, characterized in that the inner space of the steel wale structure 130 is made of a structure divided into n. The method of claim 1, wherein the outer vertical reinforcing bar 113, which is a tensile reinforcing bar in the underground junction wall to pass through the opening formed by the steel wale structure 130, continuous reinforcement between the layers, the compression reinforcement in the underground junction wall The inner vertical reinforcement 112 is an underground structure, characterized in that it is bound to the dowel reinforcement 115 and the horizontal reinforcement 116 embedded in the upper and lower through the embedded slab (S1) or to bind only to the horizontal reinforcement (116) Method of slab and plywood construction The method of claim 6, wherein the dowel reinforcement 115 is arranged at an interval of 3 to 5 times the spacing interval of the inner vertical reinforcement 112, a part of the inner vertical reinforcement 112 is the dowel reinforcement 115 and the horizontal reinforcement ( 116) and the remaining portion of the section where the dowel reinforcement (115) is not reinforcement is bound only to the horizontal rebar (116) slab and plywood construction method of the underground structure. 2. The method of claim 1, wherein in the arranging the embedded RC beam reinforcing frame 150, a plurality of horizontal rebars 151 extending side by side along the basement outer wall 111 in an area secured in the embedded slab S1 and , Slab and plywood construction method of the underground structure, characterized in that using the embedded RC beam reinforcement frame 150 made of a shape including the outer reinforcing bars 152 to tie the circumference of the horizontal reinforcing bars (151). A support bracket 122 installed on the retaining wall 100 to serve as a formwork of the embedded slab S1 and a supporting role of the steel wale structure 130; Jang wire reinforcement (123) disposed along the buried slab (S1) area on the support bracket 122 and the wire mesh formwork 124 is installed on the Jang wire reinforcement (123); A slab construction formwork structure 141 for constructing an embedded slab S1 region and a subsequent slab S region; Simultaneously with the formwork for forming the opening of the buried slab (S1) serves to support, distribute and transfer the load transmitted from the retaining wall (100), spaced apart along the buried slab (S1) area on the support bracket 122 A steel wale structure 130; Consists of a shape including the horizontal reinforcing bar 151 and the outer reinforcing bar 152 to smoothly transfer the load, and embedded RC beam reinforcement is reinforced along the buried slab (S1) area on the support bracket 122 Frame 150; Including; Concrete is laid in all slab areas except the inner space of the steel wale structure, and the slab construction is completed, and the opening formed by the inner space of the steel wale structure is used as a passage for placing the vertical reinforcing bars and concrete for the underground outer wall. Underground construction of the outer wall is completed, the slab and plywood structure of the underground structure, characterized in that the structure consisting of a basement wall and the slab structure. 10. The method of claim 9, wherein the embedded RC beam reinforcement frame 150 is a plurality of horizontal reinforcing bars 151 arranged side by side along the outer outer wall 111 in the area secured in the buried slab (S1) and the horizontal reinforcement Slab and plywood structure of the underground structure, characterized in that formed in the form including the outer reinforcing bars (152) tying around the periphery of (151). As used during the construction of the slab (S) and plywood of the underground structure, and serves as the formwork of the embedded slab (S1) and the supporting role of the steel wale structure 130, and the support bracket body is installed on the earth wall (100), Slab and plywood of the underground structure, characterized in that it consists of an auxiliary bracket 153 detachably coupled to the front end of the support bracket body, so that the auxiliary bracket can be detached from the support bracket body after curing the slab (S). Supporting bracket for construction.

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