KR200381303Y1 - Form system for joint between retaining wall and slab of basement floor - Google Patents

Abstract

The present invention relates to a formwork for constructing the connection between the basement wall and the slab, and the end of the support girder through the support beam on the bracket after installing the bracket on the H-pile of the wall, such as SCW or CIP And supporting the outer temporary member and the inner temporary member on the H-pile and the supporting girder, and constructing the connection part between the earth wall and the slab formed by installing the reinforcing bar and the wire mesh formwork on the temporary member on both sides. It relates to a formwork structure for.

According to the formwork of the present invention, since the connecting portion is embedded in the base retaining wall, construction of the basement structure without the rim beam is possible, and plywood formwork and bundling are unnecessary, so that the problems caused by its use can be solved. In addition, workability and economics can be improved by reducing formwork installation area, reducing the use of rebar and studs, simplifying rebar processing and assembly, and improving workability and shortening air by using joist reinforcing bars and wire mesh formwork that do not require separate dismantling work This becomes possible.

Description

Form system for joint between retaining wall and slab of basement floor

The present invention relates to a formwork for constructing the connection between the basement wall and the slab, and more specifically, after the bracket is installed on the H-pile of the wall, such as SCW or CIP, Supporting the end of the support girder, installed by supporting the outer temporary member and the inner temporary member on the H-pile and the supporting girder, and the earth wall and slab formed by installing the reinforcing bar and wire mesh formwork over the temporary member on both sides It relates to a formwork structure for the construction of the liver connection.

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

In other words, after the earthquake work is made on the ground where the underground structure is constructed, the temporary erection method is installed to build up the structure from the bottom layer after installing the temporary facilities that can support the earthquake while excavating the ground, and then removing all the soil. It is the reverse casting method that constructs the structure by constructing the ground floor structure after constructing the ground floor and excavating the ground from the top to the bottom using the structure as a brace for the earth.

In recent years, underground construction has been gradually intensified in order to maximize land use. Especially, when the construction is performed by the net pouring method, it is not only visually unstable as well as the occurrence of cracks due to the risk of earthquake collapse or settlement of surrounding buildings. There are various problems such as this lengthening. In recent years, the reverse pouring method has been widely applied.

Since the reverse casting method is a method of constructing the ground structure from the ground floor to the underground floor when constructing the underground structure, the construction of the underground structure and the ground structure can proceed at the same time, and the floor of the ground floor can be used as a workshop. This is unnecessary and has the advantage of being able to work with solid formwork.

Such a reverse casting method involves placing concrete slabs and beams on the ground while the ground is stopped (concrete on grade), and excaving the ground to some extent, selecting the ground, and then placing the clubs and installing the formwork to place the concrete. (Form on Supporting) and the method of placing concrete by suspending form support girders for form support on the upper concrete slab which is pre-constructed instead of erecting clubs for forming formwork. Construction method).

On the other hand, during the reinforcement construction, the reinforced concrete rim beam serving as a strip or a joining girder is installed on the outer boundary portion where the earth wall and the floor slab meet.

Here, the conventional formwork configuration and operation for the reinforced concrete rim beam construction will be described with reference to the following drawings.

1A is a cross-sectional view showing a state of installation of a conventional formwork for reinforced concrete rim beam construction, Figure 1b is a cross-sectional view showing a state in which the construction of the reinforced concrete rim beam is completed.

Figure 1a shows the concrete during curing, Figure 1b shows the concrete after curing, these figures are cross-sectional views at the position where the support girder is installed.

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

As is well known, there are soil cement walls (SCW) and cast in-place piles (CIP) as mainstream walls, and they usually use H-files as thumb piles. It serves as a vertical bending member that directly supports the earth pressure and the hydraulic pressure on the back.

For the construction of the rim beam, as shown in the prior art, after the construction of the retaining wall (1) and the pit work first, and after casting the discarded concrete (3) to install the clubs (4) to support the formwork .

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

At this time, the lumber (5) is arranged at a predetermined interval along the longitudinal direction of the rim beam to be constructed by a plurality, each of the angular materials (5) are all supported by a plurality of clubs (4).

In addition, reference numeral 7 denotes a support girder, which is a steel girder structure for supporting the slab formwork (for example, a deck plate) 15. As the support girder 7, an H-shaped steel is usually used. At the end of the girder 7 an embedded plate 8 is vertically coupled by a welding and / or fixing bracket 9a and a fastening member 9b.

As such, in the portion where the support girder 7 is installed, the embedded plate 8 serves as a formwork for forming the side edge of the rim beam, and at the same time, the structure is coupled to the rim beam in the support girder 7.

And, Figure 1a 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 longitudinal direction of the edge beam to be constructed The length of the embedded plate 8 is installed along both sides, which forms the side of the rim beam forming space together 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) including the H- pile (2), the form lower plate (6), the embedded plate (8) and the formwork side plate (not shown) In the rim beam forming space, the reinforcing work is installed to install the reinforcing bars 11 and the stub reinforcing bars 12 in the longitudinal direction, and the side of the H-pile 2 embedded in the retaining wall 1 in the rim beam forming space. After removing part of the wall, the stud bolts (eg, 3 x 2 rows = 6) 13, which are shearing members, are welded.

In addition, a stud bolt 14, which is a shear connection member, is welded to the embedded plate 8 in the edge beam forming space, and the stud bolts 13 and 14 installed as described above are embedded in the edge beam concrete. These are the ones that are constructed to increase the interlocking force between the H-pile (2) and the edge interpolation and between the edge beam and the embedded plate (support girder) (8).

In this way, after all the structures such as formwork for the construction of the rim beams are installed, when the slab and beam concrete is poured, the concrete beams are poured together to form the rim beams.

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.

However, the conventional edge beam formwork system configured as described above has the following problems.

As described above, by using the general plywood formwork (6) and copper bar (4), due to the delay in the earthwork work due to the installation of the copper bar and the occasional concrete destruction when placing concrete, and the work of the formwork is complicated, the installation work is complicated, the workability is reduced And cost increase.

In particular, when the copper barrier 4 is used, the support on the soft ground is unstable, and disassembly is impossible unless the concrete strength is maintained above a certain level. Is bound to be delayed.

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. This will be.

In addition, due to the excessive cost and time required for transportation and reassembly of the group, it is not only economical, but also the labor-intensive labor-intensive all work depends on manpower. Makes it difficult.

In addition, there is a problem that the woodworking work for the formwork for the rim beam construction during the reverse construction using the steel structure has to be carried out in the middle.

In particular, the recent installation of the deck slab by installing the deck plate (15) during reverse casting construction, whereas, when using the plywood formwork (6) made of wood for the rim beam construction as the rim beam formwork Interlocking woodworking personnel should be intermittent.

As such, in the related art, as a result of inputting heterogeneous workers in woodworking workers in addition to ironworkers, construction cost increases and the efficiency of manpower input is greatly reduced.

In addition, since the steel beams (7) should be supported by formwork or hung on steel steel beams of the upper layer during formwork at the joining part of the rim beam and the steel frame (support girder) 7, this is also a factor of lowering the workability. For the joining of the cheolgolbo (7) and the rim of the dance is being designed economically, such as the rimbo dance is larger than necessary.

In addition, rebar processing and assembly for the rim beam reinforcement is complicated, and the assembly time required for the installation of the reinforcement has become a factor of delaying the air and increase the construction cost.

In addition, there is a high risk of safety accidents because the worker has to work on the formwork as a scaffold when the formwork side plate is installed as a scaffold.

Therefore, the present invention is devised to solve the above problems, the plywood formwork and copper bar is unnecessary, the problems caused by its use can be solved, the rebar processing and assembly is simple, and the construction and economical efficiency can be improved. Its purpose is to provide a formwork for the connections between the slab and the slab, which can reduce the formwork installation area, reduce the use of rebar and studs, shorten the air, and reduce the risk of scaffolding.

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

The formwork structure of the connecting portion between the retaining wall and the slab according to the present invention, as a first embodiment, in order to construct a connecting portion of the structure projecting to the upper side of the slab,

Each support girder having an end portion inserted into the base retaining wall space to support the slab formwork structure while being supported by the girder support means installed in the H-pile of the retaining wall;

An outer temporary member installed horizontally along the connection portion to be constructed while being supported by the member supporting means installed in the H-pile of the retaining wall;

Each inner temporary member disposed in parallel with the support girder at an inner side of the outer temporary member, the both ends being supported by the member supporting means of two neighboring support girders and being installed between the support girders along the connection part;

A wire mesh formwork for forming a lower side of a straight line reinforcing bar arranged horizontally between the two temporary members and installed at a predetermined interval along the connection part, and a connecting part installed on the bottom reinforcing bar;

Square member of the square cross-section for forming the connection side is installed horizontally along the connection side side position to the upper side of the slab formwork structure;

It includes.

And, in the second embodiment, the formwork structure of the connecting portion between the retaining wall and the slab according to the present invention, in order to construct a connecting portion of the structure projecting to the lower side of the slab,

A connecting beam connected to an end of a support girder supporting the slab formwork via an end plate and inserted into an underground retaining wall space and supported by a beam support means installed in an H-pile of a retaining wall;

An outer temporary member installed horizontally along the connection portion to be constructed while being supported by the member supporting means installed in the H-pile of the retaining wall;

Each inner temporary member disposed in parallel with the support girder at the same height as the inner and upper sides of the outer temporary member, the both ends being supported by two adjacent support girders and being installed between the support girders along the connecting portion;

A plurality of horizontally disposed between the two temporary members and installed at regular intervals along the connection part, and the wire mesh formwork for forming the lower part of the reinforcement bent along the lower part and the side part of the connecting part and the connecting part installed on the reinforcing part;

It includes.

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

The present invention relates to a formwork for the construction of the connection between the slab and the slab of the basement layer, and more particularly to a formwork that can be applied when the SCW or CIP is constructed as the wall.

The SCW and CIP are using the H- pile, which is a vertical steel beam as a thumb pile, the formwork according to the present invention is installed on the bracket after installing the bracket on the H- pile installed in the wall of the SCW or CIP An outer boundary where the earth wall and the slab meet on the outer temporary member installed to support the girder wall and the inner temporary member installed to be supported by the support girder, that is, the earth wall The main focus is on the installation of joist rebars and wire mesh formwork along the connection between the and slab.

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

2 is a partial plan view showing a first embodiment of the formwork structure according to the present invention, the retaining wall 100 and the H-pile 102 therein is shown in a cross-sectional structure, the support girder The illustration of the slab formwork, ie deck plate, installed on 212 is omitted.

Figure 2 shows an example in which the CIP is constructed as a retaining wall 100, the subject innovation is because it can be applied to both the CIP bar shown as a retaining wall, or SCW using H-beams in the same way as this CIP In the following specification, these will be referred to collectively as 'soil walls' without being separated.

3A is a cross-sectional view taken along the line 'A-A' of FIG. 2, and FIG. 3B is a cross-sectional view taken along the line 'B-B' of FIG.

In addition, Figure 4 is a perspective view showing a first embodiment of the formwork structure according to the present invention, Figure 5 is a cross-sectional view taken along the line 'C-C' of Figure 3a of the end of the inner temporary member and the support girder FIG. 6 is a view illustrating a connection structure between gusset plates, and FIG. 6 is a view illustrating an example in which a c-beam is used as an inner temporary member.

FIG. 6 is a cross-sectional view taken at the same position as FIG. 3A, and the diagram on the right is a cross-sectional view taken along the line 'D-D' in the cross-sectional view on the left.

The first embodiment of the formwork structure shown in each drawing is a formwork for constructing the connection portion 300 between the slab 100 and the slab 100 taking a structure protruding to the upper side of the upper surface of the slab 200.

First, after constructing the SCW or CIP as the barrier wall 100, and then part of the barrier wall 100 in the position where the H- pile is installed so that the sides of the two neighboring H- pile 102 is exposed to the outside On the side of the two exposed H-pile 102, the first bracket 312 is welded and installed.

As shown in FIG. 4, the first bracket 312 may be used by cutting the H-beam, and thus is supported laterally on the first bracket 312 installed in two adjacent H-piles 102. The support beam 314 is welded so as to be installed.

The support beam 314 may use an H-shaped steel.

In addition, an end of the support girders 212, which are steel frame structures for supporting the slab formwork, for example, the deck plate (not shown in FIGS. 2 and 4), is supported on the support beams 314 by welding.

In addition, a second bracket 316 is welded and installed on each H-pile 102 constructed in the retaining wall 100, and the second bracket 316 is similar to the first bracket 312. A portion of the retaining wall 100 is face-changed at the location where the pile 102 is installed, and then welded on the exposed side of the H-pile 102.

As can be seen in Figure 4 as the second bracket 316 can be used to cut the c-beam, the outer side so as to be supported laterally on the second bracket 316 installed in each H-pile 102 The temporary member 318 is installed.

In the H-pile 102 in which the first bracket 312 is installed, the second bracket 316 is installed above the first bracket 312, and is directly above the first bracket even in the H-pile in which the first bracket is not installed. The second bracket is installed at the same height as the installed second bracket.

The outer temporary member 318 is for supporting joists reinforcing bars 326 which are installed at predetermined intervals along the connection part 300 between the retaining wall and the slab, and on each H-ply 102 in the retaining wall 100. It is installed horizontally along the connecting portion 300 between the retaining wall and the slab so as to extend laterally on the installed second bracket 316 (that is, the H-pile and the supporting girder of the retaining wall are installed in the transverse direction).

Square steel pipe may be used as the outer temporary member 318.

Meanwhile, in the present invention, the support girder 212 for supporting the slab formwork structure, for example, the deck plate 214, is installed with its end welded to the support beam 314, and in particular, the end of the support girder wall (100) It is installed to be inserted into the construction space of the base retaining wall to be constructed inward.

In addition, between the ends of two adjacent support girders 212, an inner temporary member 322 disposed inwardly parallel to the outer temporary member 318 is installed, and the inner temporary member 322 is supported by the support girder. 212 is disposed in the transverse direction, and is horizontally installed between the support girders 212 along the connecting portion 300 between the retaining wall and the slab.

The inner temporary member 322 is bolted to both ends of the gusset plate (324) installed in the two support girders (212), Figure 5 is the end of the inner temporary member 322 and gusset plate 324 Shows the fastening structure between

As shown, the gusset plate 324 is welded and fixed to each of the inner spaces of both sides of the support girder 212 at positions where the end of the inner temporary member 322 is supported at the end of the support girder 212, and each gusset is installed. Corresponding surfaces on which the ends of the plate 324 and the corresponding inner side temporary member 322 overlap each other are bolted and fastened to each other, whereby the inner temporary member 322 is fixedly supported to both sides about the support girder 212. It becomes possible.

Each gusset plate 324 has a structure in which a portion protrudes laterally of the support girder 212, so that the protruding portion is bolted in a state overlapped with the end corresponding surface of the inner temporary member 322. .

As the inner temporary member 322, H-shaped steel may be used as shown in FIGS. 3A and 3B, or c-shaped steel may be used as shown in FIG.

As shown in FIG. 6, when the c-beam is used, the gusset plate 324 and the corresponding surfaces overlapping the ends of the c-beam in the corresponding direction are bolted to each other and fastened as in the case where the H-beam is used. The inner temporary member 322 made of c-shaped steel can be fixed to both sides with respect to the support girder 212.

In addition, a joist rebar 326 is supported on an upper surface of the outer temporary member 318 and an upper surface of the inner temporary member 322, and a wire mesh formwork 328 is installed on the joist rebar 326.

In the first embodiment, the reinforcing bar 326 is used as a reinforcing bar having a predetermined diameter and length, a plurality of joule reinforcing bars 326 are arranged at regular intervals along the connecting portion 300 between the retaining wall and the slab. In this case, each joist reinforcing bar 326 is disposed in the transverse direction with the inner and outer temporary members 318 so that both ends thereof are supported by both temporary members (318, 322).

Of course, the joist reinforcing bar 326 installed at the support girder 212 is installed so that one end is supported on the support girder 212.

In addition, the reinforcing bar 216 of the deck plate 214, one end of the inner temporary member 322 side is installed above the support girder 212 with both ends supported by both side temporary members (318, 322). ) It is fixed at each installation position by welding to the lower part.

In addition, as described above, the straight line reinforcing bar 326 may be installed at both ends of the inner and outer temporary members 318 and 322 while being supported, and the connection part 300 to be constructed may have a lower surface of the slab 200. In order not to protrude to the lower side, the inner temporary member 322 and the outer temporary member 318 are installed so that the upper surface height is the same height, and the height of the upper surface of both side temporary members (318,322) support girder ( It is installed so as to be the same height as the upper surface height of 212).

In addition, the wire mesh formwork 328 is a formwork commonly referred to as metal rib lath (metal rib lath), which is a formwork made by placing a rib (rib) on the wire mesh lath (work form) currently used in the net formwork method to be.

This net formwork is a method of placing concrete using a special steel net instead of plywood as form plate, and it is lighter, easier to process and assemble than plywood formwork, and requires no disassembly. This has the advantage of greatly shortening the air.

On the other hand, the deck plate 214 is installed on the support girder 212, and after installing the reinforcing bar 326 and the wire mesh formwork 328 as described above, the connection between the concrete wall and the slab 300 later construction In order to protrude upward from the upper surface of the slab 200, the deck plate 214 is provided with a square member 332 having a square cross-section that serves as a formwork for forming the side of the connecting portion 300.

The lumber 332 is installed horizontally along the connection part 300 at the side position of the connection part 300, and extends laterally with the support girder 212 and in the direction along the outer boundary of the slab 200 area. Is installed.

At this time, the horn member 332 is installed by supporting the end of the deck plate 214 so that the side surface of the protruding connection portion 300 coincides with the inner surface of the base retaining wall or may be located inside the base retaining wall.

3A and 3B, reference numeral 334 denotes dowel rebars installed vertically and long enough to be embedded in an underground retaining wall to be constructed later, and reference numeral 336 denotes a side of each H-ply 102. Indicates the stud bolts installed in the weld.

Also, reference numeral 338 denotes reinforcing bars that are placed in the space of the slab 200 and the connection part 300.

In this way, after the formwork, support girder 212 and deck plate 214, dowel reinforcing bars 334, stud bolts 336, and reinforcing bars 338 of the present invention are all installed, By pouring the slab 200 and the connecting portion 300 will be constructed at the same time.

In this way, after the construction of the slab 200 and the connecting portion 300 is completed, the inner temporary member 322 and the outer temporary member 318, the shell member 332 are all dismantled for recycling, and thus the temporary members 318 and 322 are removed. After dismantling, the plywood construction, that is, going up to the upper floor, the underground retaining wall is constructed inside the retaining wall 100.

Of course, the rest of the configuration except the inner temporary member 322 and the outer temporary member 318 is used as a permanent structure.

The connecting part 300 constructed by the first embodiment of the present invention has a structure protruding from the upper surface of the slab 200 to a predetermined height.

On the other hand, Figure 7 is a partial plan view showing a second embodiment of the formwork structure according to the present invention, the retaining wall 100 and the H-pile 102 therein is shown in a cross-sectional structure, the support girder The illustration of the slab formwork, ie deck plate, installed on 212 is omitted.

8A is a cross-sectional view taken along the line 'E-E' of FIG. 7, and FIG. 8B is a cross-sectional view taken along the line 'F-F' of FIG. 7.

FIG. 9 is a cross-sectional view taken along the line 'G-G' of FIG. 8A and shows a connection structure between the end of the inner temporary member and the end plate of the support girder, and FIG. 10 is a c-shaped steel used as the inner temporary member. It is a figure showing an example.

FIG. 10 is a cross-sectional view taken at the same position as FIG. 8A, and the diagram on the right is a cross-sectional view taken along the line 'H-H' in the cross-sectional view on the left.

The second embodiment of the formwork structure shown in each of the drawings is a formwork for constructing the connecting wall between the slab and the slab having a structure projecting to the lower side of the lower surface of the slab 200.

In the second embodiment of the formwork according to the present invention is used a joist reinforcing bar 326 bent along the bottom and side shape of the connecting portion 300, as shown in the slab according to the use of the joule reinforcement 326 The connection part 300 protruding to the lower side of the lower surface 200 may be constructed.

Hereinafter, in describing the second embodiment of the present invention, the same structure as the first embodiment will be omitted.

First, the first bracket 312 and the support beam 314 is installed in the same manner as the first embodiment described above.

And, the second bracket 316 and the outer temporary member 318 supported by the second bracket 316 is installed in the same structure as the first embodiment, in this embodiment compared to the first embodiment The second bracket 316 and the outer temporary member 318 are installed at a lower position, i.e., lower than the height corresponding to the lower projecting height of the connecting part 300 (the outer temporary member is installed lower than the height of the inner temporary member). ).

In addition, a relatively low height connecting beam 342 is connected to the end of the support girder 212 via the end plate 344, and an end plate 344 is provided at the end of the support girder 212. The welding beam is installed, and the connecting beam 342 is welded on the opposite side of the end plate 344, and the support girder 212 and the connecting beam 342 are connected in a straight line via the end plate 344. It is.

In addition, the connecting beam 342 is inserted into the construction space of the base retaining wall to be constructed later, and is welded and installed in a supported state on the support beam 314, and the support girder 212 is connected to the connecting beam 342 through the support beam. The support beam 314 is supported.

The connecting beam 342 may also be embodied in an H-shaped steel like the support girder 212.

In addition, as in the first embodiment, the inner construction member 322 having the same structure is installed in a state supported by the support girder 212, where the height of the upper surface of the inner construction member 322 is the upper portion of the support girder 212. It is installed to be the same height as the surface height.

The inner temporary member 322 may be H-shaped or c-shaped steel, and the corresponding surfaces on which the ends of the two inner temporary members 322 on both sides of the support girder 212 and the end plate 344 overlap each other. By being fastened to be able to be fixedly supported by the support girder 212.

The end plate 344 has a structure in which both side portions protrude to the side of the support girder 212, and the protruding side portions are bolted in such a state that they overlap the corresponding surfaces of the inner temporary member 322.

Then, the bent bar reinforcement 326 bent is supported on the upper surfaces of both side temporary members 318 and 322 while the inner temporary member 322 and the outer temporary member 318 are installed as described above. 326 above the wire mesh formwork 328 is installed.

In the second embodiment, the reinforcing bar 326 is used as the reinforcing bar having a predetermined diameter and length, similar to the first embodiment, and a plurality of the bar reinforcing bars 326 are fixed along the connection part 300 between the earth wall and the slab. The joist reinforcing bars 326 are disposed long in the transverse direction with both side temporary members 318 and 322 with both ends supported by the inner and outer temporary members 318 (and the support girders). .

In addition, the joist reinforcing bars 326 in the installed state, as shown in Figure 8a and 8b by the bent structure in the horizontal direction from the upper side of the connecting beam 342 from the outer temporary member 318 and then bent upwards After being bent in the horizontal direction again to pass over the support girder 212 and the inner temporary member 322, one end of the inner temporary member 322 is welded to the bottom of the reinforcing bar 216 of the deck plate 214 It is fixed.

In this way, after the formwork structure, the support girder 212 and the deck plate 214, the dowel reinforcing bars 334, the stud bolts 336, the reinforcing bars 338 are all installed, the concrete is poured into the molding space. The slab 200 and the connecting portion 300 will be constructed at the same time.

After the construction of the slab 200 and the connecting portion 300 is completed, the inner temporary member 322 and the outer temporary member 318 are all dismantled for recycling. Thus, after disassembling the temporary members 318 and 322, the plywood construction is performed. That is, going up to the upper floor is to build a base retaining wall inside the retaining wall (100).

Except for the inner temporary member 322 and the outer temporary member 318, all other components are used as a permanent structure.

As described above, in the second embodiment of the present invention, the connecting portion 300 is slab 200 by the bent wire reinforcing bar 326 and the wire mesh formwork 328 installed along the bent shape of the long reinforcing bar 326. It can be constructed in a structure projecting downward from the lower surface to a certain height.

In this way, according to the formwork of the present invention, both the retaining wall and the slab connection portion 300, that is, the upper protrusion connection portion according to the first embodiment and the lower protrusion connection portion according to the second embodiment are embedded in the basement retaining wall. Because of this structure, it is possible to construct an underground structure in which the existing rim beam is omitted.

As described above, the formwork structure for the connection between the slab wall and the slab of the basement layer according to the present invention, the bracket is installed on the H-pile of the barrier wall, such as SCW or CIP, and supported on the bracket through the support beam It supports the end of the girder, is installed by supporting the outer temporary member and the inner temporary member on the H-pile and the support girder, and install the reinforcing bar and wire mesh formwork above the temporary member on both sides, Provide advantages.

1) The problem of the use of the plywood formwork and the claw is eliminated, and the end of the H-beam steel beam support girder is supported by the first bracket and the support beam of the present invention and is permanently embedded in the base retaining wall. It is not necessary to support the formwork or suspend the upper support girders, which are pre-installed, and thus the workability is remarkably improved.

2) It is absolutely advantageous for safety management because scaffolding work for installing formwork side panels is unnecessary.

3) Formwork side panels requiring woodworking work are replaced by long steel bars and wire mesh formwork, which is unnecessary, and steel frame installation work is possible irrespective of connecting formwork, simplifying installation work, improving workability, and shortening air. Become.

4) The height of the connection part can be economically designed regardless of the height of the steel girders, and the formwork installation area can be reduced, and the use of joist reinforcement and wire mesh formwork (metal ribs) are permanently purchased as formwork. Formwork dismantling is unnecessary, which improves work and workability and thereby shortens the air.

5) It is possible to reduce formwork area, reduce stub and reinforcement amount, and reduce stud usage.

6) Since there is no edge beam, the slab thickness can be made thinner, and the reinforcement spacing of reinforcing bars can be widened, making it easier to install and buy concrete pour pipes.

Figure 1a is a longitudinal sectional view showing the installation state of the conventional formwork for the construction of reinforced concrete rim beam,

Figure 1b is a longitudinal sectional view showing a state in which the construction of the conventional reinforced concrete rim beam is completed,

2 is a partial plan view showing a first embodiment of a formwork structure according to the present invention;

3A is a cross-sectional view taken along the line 'A-A' of FIG. 2,

3b is a cross-sectional view taken along the line 'B-B' of FIG.

4 is a perspective view showing a first embodiment of a formwork structure according to the present invention;

Figure 5 is a cross-sectional view taken along the line 'C-C' of Figure 3a showing the connection structure between the end of the inner temporary member and the gusset plate of the support girder,

6 is a view showing an example in which the c-shaped steel is used as the inner temporary member,

7 is a partial plan view showing a second embodiment of the formwork structure according to the present invention,

8A is a cross-sectional view taken along the line 'E-E' of FIG. 7,

8B is a cross-sectional view taken along the line 'F-F' of FIG. 7,

FIG. 9 is a cross-sectional view taken along the line 'G-G' of FIG. 8A and shows a connection structure between the end of the inner temporary member and the end plate of the support girder;

10 is a view showing an example in which the c-shaped steel is used as the inner temporary member.

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

100: retaining wall 102: H- pile

200: slab 212: support girder

214: deck plate 300: connection portion

312: first bracket 314: support

316: second bracket 318: outer temporary member

322: inner temporary member 324: gusset plate

326: joist reinforcement 328: wire mesh formwork

332: lumber 334: dowel rebar

336 stud bolt 338 rebar

342: connection beam 344: end plate

Claims (8)

In order to construct the connection between the slab and the slab of the underground projecting structure of the slab, Each support girder having an end portion inserted into the base retaining wall space to support the slab formwork structure while being supported by the girder support means installed in the H-pile of the retaining wall; An outer temporary member installed horizontally along the connection portion to be constructed while being supported by the member supporting means installed in the H-pile of the retaining wall; Each inner temporary member disposed in parallel with the support girder at an inner side of the outer temporary member, the both ends being supported by the member supporting means of two neighboring support girders and being installed between the support girders along the connection part; A wire mesh formwork for forming a lower side of a straight line reinforcing bar arranged horizontally between the two temporary members and installed at a predetermined interval along the connection part, and a connecting part installed on the bottom reinforcing bar; Square member of the square cross-section for forming the connection side is installed horizontally along the connection side side position to the upper side of the slab formwork structure; Formwork structure for the connection between the slab and the slab comprising a. The method according to claim 1, The girder supporting means is a mud wall, characterized in that it comprises a first bracket which is respectively installed on two adjacent H-pile of the mud wall, and a support beam which is installed to be supported laterally on the two first brackets on both sides; Formwork for joints between slabs. The method according to claim 1, The member supporting means for supporting the outer temporary member is a formwork structure for the connection between the retaining wall and the slab, characterized in that the second bracket is welded to the side of each H- pile of the c-beams. The method according to claim 1, The joist reinforcing bar is a formwork for the connection portion between the slab and the slab, characterized in that the one end is fixed to each installation position welded to the bottom of the reinforcement of the slab formwork structure installed above the support girder. In order to construct the connection between the slab and the slab of the underground projecting structure of the slab, A connecting beam connected to an end of a support girder supporting the slab formwork via an end plate and inserted into an underground retaining wall space and supported by a beam support means installed in an H-pile of a retaining wall; An outer temporary member installed horizontally along the connection portion to be constructed while being supported by the member supporting means installed in the H-pile of the retaining wall; Each inner temporary member disposed in parallel with the support girder at the same height as the inner and upper sides of the outer temporary member, the both ends being supported by two adjacent support girders and being installed between the support girders along the connecting portion; A plurality of horizontally disposed between the two temporary members and installed at regular intervals along the connection part, and the wire mesh formwork for forming the lower part of the reinforcement bent along the lower part and the side part of the connecting part and the connecting part installed on the reinforcing part; Formwork structure for the connection between the slab and the slab comprising a. The method according to claim 5, The beam support means is a mud wall, characterized in that it comprises a first bracket which is respectively installed on two adjacent H-pile of the mud wall, and a support beam which is installed to be supported on the two first brackets on both sides of the mud wall. Formwork for joints between slabs The method according to claim 5, The member supporting means for supporting the outer temporary member is a formwork structure for the connection between the retaining wall and the slab, characterized in that the second bracket is welded to the side of each H- pile of the c-beams. The method according to claim 5, The joist reinforcing bar is a formwork for the connection portion between the slab and the slab, characterized in that the one end is fixed to each installation position welded to the bottom of the reinforcement of the slab formwork structure installed above the support girder.