KR100634726B1 - Form system for construction of underground slab and method for constructing underground slab and breast wall using the same - Google Patents

Abstract

A structure for constructing a slab of an underground structure and a construction method of the slab without a wall girder and an underground retaining wall thereby are provided to prevent leak by reducing the joint surface of the underground retaining wall, and to cut down construction cost by omitting the wall girder in constructing the slab. A slab construction structure(104) includes a support girder(110) inserted in an underground retaining wall space and supported by a girder support unit installed to an H-pile, an inner reinforcing beam(113) fixed to the support girder by a gusset plate, a deck plate(116) supported on the support girder and the inner reinforcing beam and installed in a slab, a form unit(117) for forming a slab boundary along an interface of the slab and the underground retaining wall on the support girder and the inner reinforcing beam, and a support frame(120) connected and installed between the retaining wall and the slab to transmit force between the retaining wall and the slab. The support frame is composed of plural wale support frames(121) arranged continuously between the retaining wall and the slab. The wale support frame comprises a wale(122) horizontally supported on an upper bracket by welding and provided with a backfill part transmitting earth pressure, and plural struts(123) welded into the wale and connected to the slab in an upper part of the inner reinforcing beam and the support girder with the form unit.

Description

Form system for construction of underground slab and method for constructing underground slab and breast wall using the same}

Figure 1a 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,

1b 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;

Figure 2 is a cross-sectional view showing an example of a state made a conventional slab, rim beam and underground retaining wall construction

3 is a perspective view showing a first embodiment of a structure for constructing slab according to the present invention;

Figure 4 is a partial plan view showing a first embodiment of the slab construction structure according to the present invention,

5A is a cross-sectional view taken along the line 'A-A' of FIG. 4,

5B is a cross-sectional view taken along the line 'B-B' of FIG. 4,

Figure 6 is a cross-sectional view taken along the line 'C-C' of Figure 5b showing the connection structure between the end of the inner reinforcement beam and the gusset plate of the support girder,

Figure 7 is a cross-sectional view showing a case in which the H-beam instead of the c-beam as the inner reinforcement beam in the first embodiment according to the present invention,

8A and 8B are respectively a front view and a partial plan view showing a state in which an upper bracket and a wale, a strut, and a support member are installed on the retaining wall in the first embodiment according to the present invention;

9 is a state diagram installed in a different direction of the wale in the first embodiment according to the present invention,

10 is a cross-sectional view showing an example of a strut usable in the present invention;

Figure 11a is a partial plan view showing another example of the backfill in the present invention,

FIG. 11B is a cross sectional view taken along the line 'A'-A' 'in FIG. 11A,

12a to 12f is a cross-sectional view showing a process for the net retaining wall after the slab construction in the present invention,

13 is a partial plan view showing a second embodiment of the slab construction structure according to the present invention;

14A is a cross-sectional view taken along the line 'D-D' of FIG. 13, showing an example of using a c-beam as an inner reinforcement beam;

14B is a cross-sectional view showing an example of using the H-shaped steel as the inner reinforcement beam in the second embodiment of the slab construction structure according to the present invention;

15 is a partial plan view showing a third embodiment of the slab construction structure according to the present invention;

16 is a cross-sectional view taken along the line 'E-E' of FIG. 15,

17 is a perspective view showing a fourth embodiment of the slab construction structure according to the present invention;

18 is a partial plan view showing a fourth embodiment of a slab construction structure according to the present invention;

19 is a cross-sectional view taken along the line 'F-F' of FIG. 18,

20 is a cross-sectional view showing several examples of the grating support frame manufactured by varying the shape of the end plate in the fourth embodiment according to the present invention;

FIG. 21 is a plan view showing various examples of a grating support frame manufactured by varying an arrangement direction of cross bars in a fourth embodiment according to the present invention; FIG.

22 is a plan view showing an installation example of the grating support frame shown in FIG.

FIG. 23 is a cross-sectional view showing an example of a grating support frame manufactured by allowing the cross bars to penetrate the upper and lower middle portions of the flat bar in the fourth embodiment according to the present invention; FIG.

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

100: retaining wall 101: H- pile

102: slab 103: basement retaining wall

104: slab construction structure 110: support girder

111: lower bracket 112: support beam

113: medial reinforcement 114: gusset plate

115: fastening means 116: deck plate

117: formwork 118: wire mesh formwork

119: upper bracket 120: support frame structure

121: wale support frame 122: wale

123: strut 124: bracing member

125a, 125b: backfill 126: rebar

127: wire mesh formwork 128: stud

129a: Upper connecting bar 129b: Lower connecting bar

131a, 131b: vertical rebar 132: end plate

133: stud 134: individual end plate

135: stud 141: grating support frame

142a, 142b: end plate 144b: flat bar

144c: cross rebar

The present invention relates to a slab construction structure of the underground structure and the slab and the base retaining wall construction method omitted the rim beam using the same, more specifically, the construction of the slab of the underground structure that can be applied when the SCW or CIP is constructed as a retaining wall The present invention relates to a construction method for slabs and basement retaining walls, in which a structural structure and a frame beam using the same are omitted.

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.

Since the reverse casting method is a method of constructing the ground structure from the ground floor step by step, construction of the underground structure and ground structure can proceed at the same time, and the floor of the ground floor can be used as a workshop. 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 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).

On the other hand, in the case of reverse casting, a reinforced concrete perimeter beam, which acts as a strip or a joining girder, is usually installed at the outer boundary where the earth wall and the floor slab meet, and after completion of the slab construction of all basement floors, As you go upstairs, you will build a plywood (underground retaining wall) inside the retaining wall.

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.

Figure 1a is a cross-sectional view showing the installation state of the formwork structure for the construction of the slab and the rim beam according to the prior art, Figure 1b is a cross-sectional view showing a state of completion of the construction of the slab and the rim beam according to the prior art.

Figure 1a shows the concrete during curing in the form installed state, Figure 1b shows the state of the form dismantled after curing of the concrete, these figures are in the position where the support girder (7) for supporting the deck plate (15) is installed It is a cross section of.

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

As is well known, the form of the retaining wall 1 includes a heat cement wall (SCW) and a cast in-place pile (CIP), which usually use an H-pile 2 as a thumb pile. This H-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, as shown in the prior art, after the construction of the retaining wall (1) and the first work to excavate, cast concrete (3) and install the copper bar (4) to form the formwork Supported.

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 placed horizontally to support it, and on top of this horizontal plywood formwork, that is, the formwork plywood formwork (formwork side plate, not shown) for rim beam side forming is fixed and supported vertically. .

At this time, a plurality of the lumber (5) is arranged at a predetermined interval along the longitudinal direction of the rim beam 17 to be constructed, each of the lumber (5) is supported by a plurality of copper wheels (4) as shown .

In addition, as a 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, and the support girder 7 is usually H-shaped steel. It is used, one end of which is supported by the copper wheel 4, the formwork lower plate 6, etc., and at one end, an embedded plate 8 is welded and / or fixed bracket 9a and fastening member 9b. Combined vertically by

In this way, in the portion where the support girder 7 is installed, the embedded plate 8 serves as a formwork for forming the rim beam side and at the same time becomes a structure coupled to the rim beam 17 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 edge beam 17 to be constructed Along the lengthwise direction of the embedded plate 8 is installed long both sides, which together with the embedded plate 8 of the end of each support girder 7 forms the side of the rim beam forming space.

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 frame beam forming space, the longitudinal reinforcing bar 11 and the stirrup reinforcing bar 12 are installed, and the reinforcing work for connecting and installing the connecting bar 19 embedded in the underground retaining wall space up and down, and the frame beam forming In the space, the flange surface of the H-pile 2 embedded in the retaining wall 1 is removed, and then a stud (for example, 3 x 2 rows = 6 pieces) 13, which is a shear connection member, is welded to the flange surface of the H-pile 2. .

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 -These are constructed to increase the mutual binding force between the pile (2) and the edge beam 17, and between the edge beam 17 and the embedded plate (8).

After installing all the structures such as 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). .

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 and repeating the above operations for each floor step by step slab and rim beam construction step by step, and when the construction of the slab and rim beam for all basement is completed, retaining wall formwork and concrete construction border The retaining wall (plywood) is to be constructed so that the beam is not exposed.

In general, the retaining wall construction is performed in a smooth construction method of smooth construction while rising from the bottom layer as described above, or after the slab construction, constructs the retaining wall on the upper side, and then performs the lower slab construction, and then again the retaining wall on the upper side. Work is done in reverse construction method to construct the construction.

2 is a cross-sectional view showing an example of a state in which a conventional slab, rim beam and underground retaining wall construction is made, 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.

As shown, after the construction of the slab 16 and the rim beam 17 is completed, a retaining wall formwork (not shown) is installed inside the retaining wall 1, and concrete is poured into the form space to retain the retaining wall 18. Will be constructed.

Referring to FIG. 2, a simple example up to the second basement floor will be described. In the case 1, the construction sequence of ① → ② → ③ → ④ → ⑤ shows the sequence when the retaining wall 18 is smoothly constructed. In the case 2, the construction sequence of ① → ② → ③ → ④ → ⑤ shows the sequence when reverse retaining the retaining wall 18.

On the other hand, according to the prior art shown in Figures 1a and 1b, and Figure 2 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 barry (4), a lot of work disturbances occur due to the delay of earthwork work due to the installation of the copper bar and the occasional formwork destruction during concrete pouring As a result, the formwork is complicated to install, resulting in poor constructionability and cost increase.

In particular, when the copper barrier 4 is used, support on the soft ground is unstable, and disassembly is impossible unless the strength of the concrete is maintained above a certain level. There is a problem that the air must 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, 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 for the rim beam construction during the reverse construction using the steel structure has to be carried out in the middle.

In particular, the deck slab (16) is installed by installing the deck plate (15) during reverse casting, whereas the plywood formwork (6) made of wood is used as it is for the construction of the rim beam (17). In such cases, woodworking personnel for the edging beam formwork should be intermittent.

In this way, by adding the heterogeneous workforce of the woodworker in addition to the ironworker, the construction cost is increased and the efficiency of manpower input is greatly reduced.

In addition, since the steel beams 7 should be supported as formwork at the joint formwork of the rim beam 17 and the cheolgolbo (supporting girder) 7, this also becomes a factor of deteriorating the workability, and a large dance steel beam (7). ) And the edge beam dance is larger than necessary for the bonding of the edge beam 17 and the edge beam 17.

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.

In addition, there is a problem of excessive amount of stirrup and reinforcing bar, waste of material due to excessive use of connecting bar, complicated reinforcing and assembly of reinforcing bar reinforcement, and assembly time for installing reinforcement is needed. It is a factor of delay and increase of construction cost.

In addition, as the slab 16 is pre-installed and the retaining wall 18 is post-installed, a joint surface occurs between the upper and lower surfaces of the rim beam 17 and the retaining wall 18. In order to solve such a leak problem, a repair work must be performed to inject epoxy between the joint surfaces after construction.

The above problem related to the joining between the rim beam and the retaining wall is particularly a problem when the retaining wall reverse construction as shown in the 'case 2' of FIG. 2, the bottom of the rim beam 17 and the top of the retaining wall 18 in accordance with the shrinkage of the concrete The gap between the joining surfaces can be large, which is solved by repair work such as epoxy injection, but it is a part that needs improvement.

In addition, a separate inlet for filling the retaining wall concrete (buying the filling pipe at intervals of about 1 m to the rim beam) is required, which also has a problem in that the workability is deteriorated.

Therefore, the present invention has been invented to solve the above problems, it is possible to omit the edge beam construction when the slab construction can be solved a number of problems according to the construction of the edge beam, it is necessary to use the copper bar and plywood formwork In addition, it is possible to prevent leakage due to the reduction of the joint surface in the basement retaining wall, and to eliminate the need for connecting reinforcing bars between the upper and lower retaining walls. The purpose of the present invention is to provide a slab construction structure of the underground structure that can improve the workability because the filling pipe does not need to be embedded in the rim beam, and a slab and underground retaining wall construction method in which the rim beam is omitted.

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

The present invention, in the slab construction structure of the basement layer including a support girder and a deck plate,

A support girder having one end inserted into the underground retaining wall space and supported by the girder supporting means installed in the H-pile of the retaining wall; An inner reinforcement beam having end portions fixed to one end of two adjacent support girders through a gusset plate at the same height as the support girders and installed between the support girders; A deck plate installed in the slab space while being supported on the support girder and the inner reinforcement beam; Forming means for slab interface forming on the support girder and the inner reinforcement reinforcement along the interface between the slab space and the underground retaining wall space to enable pre-installation of the slab and post-installation of the base retaining wall; It characterized in that it comprises a; support structure which is installed between the retaining wall and the slab space in the underground retaining wall space to enable the force transfer between the retaining wall and the slab.

In particular, the support frame structure is composed of a plurality of wale support frame that is continuously disposed between the retaining wall and the slab space, each of the wale support frame,

A wales welded to be supported transversely on the upper brackets installed on the H-pile of the retaining wall, and having a backfill portion installed for transferring earth pressure between the retaining wall; And a plurality of struts, one end of which is connected to the support girder and the upper slab of the inner side reinforcement through the formwork, with the other end welded to the wale.

Here, the formwork means is a wire mesh formwork which is installed along the interface of the entire boundary surface, characterized in that each strut is inserted into the slab space through the wire mesh formwork.

In another embodiment, the formwork means is a wire mesh formwork is installed along the entire boundary surface, the individual end plate is welded to the other end of each strut is fixed and supported on the support girder and the inner reinforcement, Studs inserted into the slab space through the wire mesh formwork are welded to the rear surface of each end plate.

In another embodiment, the support frame structure is composed of a plurality of grating support frames in a continuous arrangement between the retaining wall and the slab space, each grating support frame having two end plates on both sides and an end between the two end plates. It consists of a plurality of flat bars fixed to the end plate is installed, a plurality of cross reinforcing bars are fixed laterally fixed to the flat bar, the end plate on one side of the two end plates is the inner reinforcement outside the formwork means Above, the other end plate is characterized in that it is supported laterally on the adjacent upper brackets and welded while having a backfill for earth pressure transmission between the earth wall.

In another embodiment, the formwork means is a wire mesh formwork is installed along the interface between the entire boundary surface, the connecting bars penetrating the wire mesh formwork is installed in the basement retaining wall space and the slab space above the grating support frame It is done.

On the other hand, the present invention, in the method for constructing the slab and basement retaining wall of the basement layer,

(a) installing a retaining wall along the boundary of the building to be constructed, and constructing a frame pillar in the inner ground thereof; (b) exploding the ground of the soil wall to expose the upper portion of the soil wall and the frame pillar; (c) each supporting girders are installed on the supporting beams by installing a lower bracket on the corresponding H-pile of the retaining wall, and then installing a support beam on two adjacent lower brackets, and then supporting and fixing one end on the support beam. Installing between the frame pillars; (d) fixing the inner reinforcement beams through the gusset plate at the same height as the support girder between one end of each neighboring two support girders installed between the retaining wall and the frame pillar; (e) installing a deck plate in the slab space above the support girder and the inner reinforcement beams; (e) Forming means for forming the slab interface along the interface between the slab space and the underground retaining wall space on the support girder and the inner reinforcement beam, and connecting the support frame structure between the retaining wall and the slab space in the underground retaining wall space Steps; (g) constructing the slab by placing concrete in the slab space bounded by the formwork means; (h) constructing the slabs of the entire basement layer by repeating step (b) to (g) down to the lower layer step by step; (i) installing the formwork of the basement retaining wall and placing concrete to perform the net construction of the basement retaining wall while going up from the lower floor to the upper floor; and characterized in that it comprises a.

Particularly, in the step (e), a plurality of wale support frames are prepared by installing the wire mesh formwork along the entire boundary surface with the formwork means and installing the struts on the wales as the support frame structure. The slabs are continuously arranged between the slab spaces, and each of the wales is horizontally supported on the upper brackets installed on the H-pile of the wall, and the end of each strut is inserted into the slab space by inserting the end of the strut into the slab space. Between the wall and the wale is characterized in that the backfill for the earth pressure transmission.

In another embodiment, in the step (e), a wire mesh formwork is installed in the formwork along the entire boundary surface, and a plurality of grating support frames are continuously connected between the retaining wall space and the slab space in the basement wall space as the support frame structure. A grating support frame including two end plates on both sides, and a plurality of flat bars having ends fixed to the end plates between the two end plates, and a plurality of cross bars installed laterally fixed to the flat bars. One end of the two end plates on the inner reinforcement to the outside of the formwork means, while the other end plate is fixedly supported on the upper brackets installed on the H-pile of the retaining wall, while the retaining wall and the Between the end plates on the other side, a backfill for the earth pressure And that is characterized.

Here, the cross bars are characterized in that using a grating support frame is fixed to the upper portion and the lower portion of the flat bar, respectively.

Alternatively, the cross bars are characterized in that using a grating support frame penetrating the upper and lower middle portions of the flat bar.

In addition, the support frame structure is characterized by using a combination of orthogonal grating support frame cross bars are arranged at right angles to the flat bar, and inclined arrangement type grating support frame cross bars are arranged in an inclined direction with respect to the flat bar.

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

The present invention relates to a slab construction structure of the underground structure that can be applied when the SCW or CIP is constructed as a retaining wall, and a slab and underground retaining wall construction method is omitted using the same.

Since the present invention can be applied to both the vertical construction CIP or SCW as a thumb pile, it will be referred to collectively as 'soil wall' in the present specification without separating them.

Figure 3 is a perspective view showing a first embodiment of the slab construction structure according to the present invention, Figure 4 is a partial plan view showing a first embodiment of the slab construction structure according to the present invention the wall 100 and The H-pile 101 therein is shown in cross section in the transverse direction.

5A is a cross-sectional view taken along the line 'A-A' of FIG. 4, FIG. 5B is a cross-sectional view taken along the line 'B-B' of FIG. 4, and FIG. 6 is a line 'C-C' of FIG. 5B. As a cross-sectional view taken along a view showing a connection structure between the end of the inner reinforcement beam 113 and the gusset plate 114 of the support girder 110.

5A and 5B show a state where the deck slab 102 is constructed and before the basement wall is constructed, FIG. 5A shows a position where the support girder is not installed, that is, between the support girder and the support girder. 5B is a cross-sectional view showing the lower bracket 111, the support beam 112, and the support girder 110 together.

6 shows only the cross section of the inner reinforcement beam 113 and the gusset plate 114, the fastening means 115 fastening them, and the support girder 110 in order to clearly show the connection structure.

In addition, Figure 7 is a cross-sectional view showing a case in which the H-beam instead of the c-beam as the inner reinforcement beam in the first embodiment according to the present invention, Figures 8a and 8b is a first embodiment according to the present invention, respectively Is a front view and a partial plan view showing a state in which an upper bracket, a wale, and a strut are installed on the retaining wall.

First, after constructing the SCW or CIP as the barrier wall 100, girder support means for supporting one end of each support girder 110 is installed on the barrier wall 100, the girder support means is a barrier wall 100 The lower bracket 111 is fixedly installed on the H-pile 101, and the support beam 112 is fixedly supported on the lower bracket 111.

In more detail, first, a portion of the retaining wall 100 is shredded at the position where the H-pile 101 is installed so that the flange surfaces of the two neighboring H-piles 101 are exposed to the outside, and the two exposed H- are exposed. The lower bracket 111 is welded and installed on the flange surface of the pile 101.

The lower bracket 111 can be used to cut the H-shaped steel, the support beam 112 is welded on the lower bracket 111 so as to be supported laterally.

The support beam 112 is to directly support one end of the support girder 110 as shown in Figure 5b, it is possible to use the H-shaped steel.

In addition, the support girders 110, which are steel frame structures for supporting the deck plate 116, are installed at respective positions, wherein each support girder 110 is supported by the support beam 112 at one end thereof and the other end thereof at the opposite end thereof. Is supported on the frame pillar not shown as in the prior art.

Here, one end of each support girder 110 is welded in a supported state on the support beam 112, and eventually the support girder 110 has an earth end wall through the support beam 112 and the lower bracket 111 through the end. It takes a form that is fixedly supported on the H-pile 101 of (100).

One end of the support girder 110 is inserted into a space (left space of the retaining wall concrete placing line on the drawing) of the underground retaining wall (hereinafter referred to as 103 in FIG. 12F) to be completely embedded in the concrete of the underground retaining wall. In this way, in the underground structure, one end of the support girder 110 is embedded in the underground retaining wall and used as a permanent structure.

In addition, the inner reinforcement beam 113 is horizontally installed between one end of the two adjacent support girders 110, the inner reinforcement beam 113 is disposed in the transverse direction with the support girder 110, the slab 102 ) Along the boundary between the basement retaining wall.

The inner reinforcement beam 113 is fixed to both ends are bolted to the gusset plate 114 installed on the two support girders 110, the end of the inner reinforcement beam is connected to one end of the support girder via the gusset plate Is as shown in FIG.

In the position where the end of the inner reinforcement beams 113 are supported at one end of each support girder 110, the gusset plate 114 is welded and fixed to both inner spaces of the support girder 110, and each gusset plate 114 is fixed. ) And the corresponding surfaces overlapping ends of the inner side reinforcement beams 113 are bolted and fastened to each other, whereby the left and right inner side reinforcement beams 113 are fixed to both sides about the support girder 110. It can be supported.

Each gusset plate 114 is a part of the structure protruding to the side of the support girder 110, the protruding portion is superimposed on the end corresponding surface (vertical side surface) of the inner reinforcement beam 113 It is intended to be bolted.

As the inner reinforcement beam 113, as shown in Figure 5a and 5b can be used c-shaped (channel), wherein the upper surface of the c-beam is the same height as the upper flange surface of the support girder 110 It is installed as possible.

Alternatively, as shown in FIG. 7, the inner reinforcement beams 113 may be H-beams instead of c-beams, and even when H-beams are used, the gusset plate 114 may be used as with the c-beams. Corresponding surfaces of which the ends of the corresponding H-beams overlap each other are bolted and fastened to each other, whereby the inner reinforcement beams 113 made of H-beams can be fixed to both sides about the support girder 110 in a long way. do.

H-shaped steel used as the inner reinforcement beam 113 is installed so that the upper flange surface is the same height as the upper flange surface of the support girder 110.

In addition, the deck plate 116, which is a formwork for slab construction, is installed above the support girder 110 in the state where the support girder 110 is installed as described above, and formwork means is provided on the interface between the slab space and the underground retaining wall space. 117 is installed.

The formwork means 117 is installed along the interface between the slab space and the underground retaining wall space on the support girder 110 and the inner reinforcement beam 113 to enable the pre-installation of the slab 102 and the post-installation of the underground retaining wall 103. As for the slab interface shaping, it is possible to use wire mesh formwork 118.

The wire mesh formwork 118 is a formwork commonly referred to as metal rib lath, which is a form made by placing ribs on a wire mesh lath, and is currently used in a net formwork.

The wire mesh formwork 118 may be fixed by welding the inner reinforcement beams 113 and the struts 123 and the connecting bars 129a and 129b to be described later.

As described above, the wire mesh formwork 118 is installed along the interface between the slab space where the deck plate 116 is installed and the underground retaining wall space (which is a conventional edge beam forming space), so that only the slab space is separated from the underground retaining wall space. It is possible to pour preferentially, and the construction of the basement retaining wall (denoted by 103 in FIG. 12F) after the slab 102 is constructed while the conventional rim beam is deleted.

In addition, the surface of the H-pile 101 is installed in the position of the wall wall 100 after the face-mounted and the upper bracket 119 is welded and installed on the flange surface of the exposed H-pile 101, this upper bracket 119 ) Can be used by cutting the angle of the cross-section 'a' to the required length.

In the H-pile 101 in which both the upper bracket 119 and the lower bracket 111 are installed, the upper bracket 119 is installed at a predetermined distance above the lower bracket 111, and the lower bracket 111 is installed. The upper bracket 119 is installed at the same height even in the non-H-pile 101.

In addition, the upper bracket 119 is installed by welding the wale 122 so as to be supported laterally. As in the preferred embodiment of FIGS. 8A and 8B, the H-pile 101 adjacent to the retaining wall 100 is installed. The upper bracket 119 is installed on both of the two H-files except for the H-file in the middle of the three H-files 101, and the two upper brackets ( 119) can be installed by welding one wale (122).

Two upper brackets 119 and one wale 122 may be provided for three H-piles 101 of each unit.

In addition, a plurality of struts 123 disposed laterally are disposed on the wales 122 at predetermined intervals, and the struts 123 have the other end in the slab space with one end welded to the corresponding wales 122. It is inserted and installed.

Here, each of the struts 123 is inserted into the slab space through the cutting portion of the wire mesh formwork 118 is installed at the interface between the slab space and the underground retaining wall space.

The w-channel 122 may be used as a c-beam, and the c-beam may be installed as shown in (a) or (b) of FIG.

In the example of FIG. 9A, the opening direction of the wale 122 is directed toward the slab 102. The struts 123 on the right side are welded to the inner side of the wale 122. , Concrete is backfilled between the opposite outer surface of the wale 122 and the retaining wall 100.

On the other hand, (b) the drawing is such that the opening direction of the wale 122 is directed toward the retaining wall 100, the struts 123 on the right side is welded to the outer end of the wale 122 is installed The concrete is backfilled with the retaining wall 100 including the inner space of the wale 122.

As the strut 123, one selected from several kinds of length members having a cross section of FIG. 10 may be used.

10 is a cross-sectional view showing an example of each member that can be used as a strut in the present invention, the angle of the (a) 'a' cross section, (b) c-beam (channel member), (c) to the strut 123 Steel bar, (d) round pipe, (e) square pipe may be used.

In the present invention, one wales 122 supported by the two upper brackets 119 and a plurality of struts 123 installed on the wales 122 constitute a pair of wale support frames 121, and As described above, one set of wale support frames 121 are repeatedly provided in the same manner for each of the three H-piles 101 of the retaining wall 100, and as a whole, as the support frame structure 120, the retaining wall 100 and the slab space are provided. A plurality of wale support frame 121 is connected between.

As such, the support frame structure 120 is installed between the retaining wall 100 and the slab space in the underground retaining wall space to enable the force transmission between the retaining wall 100 and the slab 102, and the retaining wall 100 And a plurality of wale support frames 121 continuously arranged between the slab space.

The size of each wales support frame 121 is appropriately adjusted according to the field working conditions.

Preferably, in order to prevent each of the wale support frames 121 from being twisted by the uneven earth pressure transmitted from the retaining wall 100, a plurality of torsion preventing brace members 124 are provided as shown in FIG. 8B. Each bracing member 124 is installed in an inclined direction between two adjacent struts 123.

The brace member 124 is welded to the upper surface of the strut 123 is installed, it can be implemented as a metal length member, such as the angle of the 'b' cross-section (bar), two brace member ( 124 is installed in three struts 123 in an inclined direction, one end of the two support members 124 is welded to one end of the earth wall 100 of the strut 123 located in the center, and two support members ( The other end of 124 is welded to the other end of the slab 102 side of the strut 123 located left and right.

Then, the backfill portion 125a is constructed in the space between the retaining wall 100 and the wale 122 in the state where each structure is installed as described above, and the retaining wall 100 and the wale are formed by the backfill portion 125a. Let 122 be connected to each other.

The back filling portion 125a serves to deliver the earth pressure transmitted from the retaining wall 100 to the wale 122, and thus the earth pressure transmitted to the wale 122 is transferred to the slab 102 through the struts 123. It can be distributed evenly.

As an example of the construction of the backfill, it is performed by filling the entire concrete space between the retaining wall and the wale or inserting a piece of H-beam or c-shaped steel into the space between the retaining wall and the wale in multiple positions. Can be.

First, as shown in FIG. 4, the plurality of strands of reinforcing bars 126 are laterally supported on the neighboring upper bracket 119 in order to fill the entire concrete space between the retaining wall 100 and the wale 122. After installation, the wire mesh formwork 127 is laid thereon, and concrete is filled on the wire mesh formwork 127 to approximately the height of the wale 122 (see FIGS. 5A and 5B), and The concrete backfill portion 125a is formed.

Alternatively, when using H-beam or c-beam stubs 125c as the backfill 125b, as shown in FIGS. 11A and 11B, the H-pile 101 is not constructed for each section stub 125c. Inserted between the retaining wall 100 and the wale 122.

Meanwhile, in the accompanying drawings, reference numeral 128 denotes a stud that is welded at equal intervals along the longitudinal direction of the upper surface of the inner reinforcement beam 113, and reference numerals 129a and 129b respectively pass through the wire mesh formwork 118. The upper connecting bar and the lower connecting bar are connected to the slab space and the underground retaining wall space.

The stud 128 of the upper surface of the inner reinforcement beam 113 is embedded in the concrete after the construction of the slab 102 serves to increase the binding force between the slab 102 and the inner reinforcement beam 113, the upper and lower connections Reinforcing bars 129a and 129b are installed at upper and lower positions along the entire section of the junction between the slab 102 and the basement retaining wall 103 so that the slab 102 and the basement retaining wall (reference numeral 103 in FIG. 12F) are concretely constructed later. It is structurally connected.

As a result, in the present invention, even if a conventional rim beam is not installed, the lower bracket 111 welded to the H-pile 101 of the retaining wall 100, the support beam 112 fixed on the lower bracket 111, The support girder 110 fixed on the support beam 112 and the inner reinforcement beams 113 supported by the support girder 110, studs for binding the inner reinforcement beams 113 and the slab 102 mutually ( 128), the upper and lower connecting bars 129a and 129b connecting the slab 102 and the basement retaining wall 103 form the retaining wall 100, the slab 102 and the basement retaining wall (103 in FIG. 12F). It is possible to integrate structurally and stably.

Reference numerals 131a and 131b denote vertical reinforcing bars (retaining wall reinforcing bars) installed vertically in the retaining wall space during the construction of the underground retaining wall, and the inner vertical reinforcing bars 131a and the outer vertical reinforcing bars 131b are used together. Is installed.

Here, as shown in FIG. 11A, the inner vertical rebar 131a is vertically installed in the retaining wall space just outside the wire mesh formwork 118, and the outer vertical rebar is disposed on the outer side of the wale 122 on the outer side (on the drawing). It is installed vertically up and down in the left P1 position) or inward (right P2 position in the drawing).

In addition, when constructing the plain concrete backfill 125a for the entire section of the space between the retaining wall 100 and the wale 122, as shown in FIG. 4, the outer vertical reinforcing bars 131b are placed inside the wale 122. Install at (P2 position).

The vertical reinforcing bars 131a and 131b connect the upper and lower basement retaining walls in the concrete of the smoothly constructed basement retaining wall 103.

Hereinafter, a process of constructing the slab and the base retaining wall of the basement layer using the slab construction structure made as described above will be described with reference to FIGS. 12A to 12F.

First, as in the prior art, after installing the mud wall 100 along the boundary line of the building to be constructed, constructing a frame pillar (not shown) in the inner ground, and then proceed to the trench of a predetermined depth first Allow the wall 100 and the upper part of the framework to be exposed (FIG. 12A).

Subsequently, after installing the lower brackets 111 on the H-piles 101 of the retaining wall 100, respectively, the support beams 112 are installed on the lower brackets 111, and then the support beams 112 are disposed on the lower brackets 111. In order to support and fix one end of the support girder 110 (see Fig. 5b), each support girder is installed between the support beam and the frame pillar (between the mud wall and the frame pillar), between the frame pillars Also, support girders are installed in the same manner as before.

At this time, one end of each support girder 110 supported on the support beam 112 is inserted into the basement retaining wall space as shown in Fig. 5b, and supports the other end of the support girder at the position of the frame pillar by the support means. The connection method between the support girder and the pillar for the frame is the same as in the prior art, and thus the illustration is omitted in FIGS. 12A to 12F.

Thereafter, the gusset plate 114 is made to have the same height as the support girder 110 between the one end of the two neighboring support girders 110 installed between the retaining wall 100 and the frame pillar. It is fixedly installed horizontally long by the media (see Figs. 4 and 5b).

Thereafter, the deck plate 116 is supported and installed in all the slab spaces on the support girder 110 and the inner reinforcement beams 113, so that the pre-construction of the slab 102 and the post-construction of the basement retaining wall 103 are possible. On the support girder 110 and the inner reinforcement beam 113, formwork means for forming the interface of the slab 102 along the interface between the slab space and the basement wall wall space, that is, wire mesh formwork 118 is installed.

Thereafter, the upper brackets 119 are respectively installed on the corresponding H-piles 101 of the retaining wall 100, and the support frame structure 120 as described above between the retaining wall 100 and the slab space in the underground retaining wall space. In this case, the wales 122 constituting the support frame structure 120 are fixed by being supported on the upper bracket 119, and each strut 123 penetrates through the wire mesh formwork 118 to end portions thereof. It will be inserted into the slab space.

In addition, the construction of the back fill portion 125a of the wale 122, the installation of the studs 128 on the upper side of the inner reinforcement beam 113, the installation of connecting reinforcing bars (129a, 129b) between the slab space and the underground retaining wall space.

Thus, after installing all the elements constituting the slab construction structure 104 of the present invention in the corresponding position, the concrete is first placed in the slab space on the right side of the drawing bounded by the wire mesh formwork 118 Construction of the construction 102, in which the concrete is not poured into the basement retaining wall space (FIG. 12B).

When the construction of the slab 102 is completed, the construction of the lower slab 102 in the same work and construction, and then continue to descend to the lower floor to repeat the work step by step to construct all the slab 102 of the basement floor ( 12c).

Thus, since the construction of the slab 102 is completed in the state that the concrete is not poured in the underground retaining wall space (including the conventional rim beam forming space), the barrier wall 100 and the slab 102 were connected before the underground retaining wall construction. All conventional rim beams are omitted, and instead, the support girders 110 and the wale support frame 121 distribute and support the concrete load of the slab 102.

After completing the construction of the slab 102 of the base layer and the entire basement layer (FIG. 12D), the underground retaining wall 103 is constructed, and vertical reinforcing bars 131a and 131b are installed in the underground retaining wall space. After the formwork (not shown) is fixedly installed along the retaining wall concrete pouring line, concrete is poured into the formwork, and the construction is carried out while the netting construction, that is, goes from the lower floor to the upper floor (FIGS. 12E and 12F).

As a result, the construction of the slab 102 and the basement retaining wall 103 of the basement layer where the rim beam is omitted through the above process is possible.

In this way, in the prior art, since the edge beam is necessarily installed between the upper and lower basement retaining walls, a joint surface causing leakage problems occurs between the edge compensation, the lower surface and the retaining wall. Although the generation of gaps between the joint surfaces has been pointed out as a big problem, according to the construction of the slab and the underground retaining wall according to the present invention, only one joint surface (construction joint) is generated between the upper and lower retaining walls due to the elimination of the rim beam, thereby preventing leakage. effective.

In addition, there is no need for connecting reinforcing bar beams and connecting upper and lower retaining walls, and at the same time, the amount of reinforcing bars is reduced and economical, and there is no need to purchase filling pipes for retaining wall concrete castings. Also gets better.

On the other hand, Figure 13 is a partial plan view showing a second embodiment of the slab construction structure according to the present invention, Figure 14a is a cross-sectional view taken along the line 'D-D' of Figure 13 c as the inner reinforcement beam 113 Fig. 14B is a view showing an example using a shaped steel, and Fig. 14B is a view showing an example using an H-shaped steel as the inner side reinforcement beam 113.

FIG. 13 illustrates an example in which H-shaped or c-shaped slabs 125c are installed as the back filling portion 125b. However, FIGS. 14A and 14B show an example of a plain concrete filling as the back filling portion 125a. Reveal.

In the configuration of the second embodiment, the same configuration as in the first embodiment has been described above in detail, and thus description thereof will be omitted.

As shown, in the second embodiment, the deck plate 116 is installed and the end of the slab space where the concrete pre-construction is performed, and the base retaining wall space where the concrete retaining wall space is formed after the slab 102 is constructed. Plate 132 is located.

The end plate 132 is commonly welded to the slab 102 side end of the struts 123 constituting the wale support frame 121 is installed along the boundary position of the slab 102, the overall reinforcement ( 113) and a support girder (not shown).

As the end plate 132 is installed, the strut 123 cannot be inserted into the slab space, and the connecting bars 129a and 129b of the slab space are connected to the underground retaining wall space through the end plate 132. Since it is difficult, in the second embodiment, the force transmission through the stud is made.

That is, the studs 128 are welded at equal intervals along the longitudinal direction of the upper surface of the inner reinforcement beams 113, and the studs 133 are inserted into the underground retaining wall space on the vertical surface of the inner reinforcement beams 113. Weld at equal intervals along the longitudinal direction.

The stud 133 is installed in the vertical section can be installed in two rows up and down, after the construction of the slab 102, the stud 128 of the upper surface of the inner reinforcement beam 113 is in the slab concrete, studs of the vertical section after the construction of the underground retaining wall Buried in the basement retaining wall concrete, the slab 102 and the basement retaining wall is reliably connected through the inner reinforcement beam 113 and the studs (128,133).

If necessary, one end of the upper connecting bar 129a and the lower connecting bar 129b disposed in the slab space is welded to the end plate 132 to be connected.

On the other hand, Figure 15 is a partial plan view showing a third embodiment of the slab construction structure according to the present invention, Figure 16 is a cross-sectional view taken along the line 'E-E' of FIG.

FIG. 15 shows an example in which H-shaped or c-shaped slabs 125c are installed as the back filling portion 125b, but FIG. 16 shows that an example of a plain concrete filling is shown as the back filling portion 125a.

In the configuration of the third embodiment, the same configuration as that of the first embodiment has been described above in detail, and thus description thereof will be omitted.

As shown, in the third embodiment, the wire mesh formwork 118 is installed in the interface between the slab space and the basement wall wall space in the same manner as the first embodiment, but the strut 123 is provided with the wire mesh formwork 118. Do not penetrate.

However, a rectangular individual end plate 134 is welded and installed at the end of the slab 102 side of each strut 123, and the back surface of the end plate 134 penetrates the wire mesh formwork 118 in the slab space. The stud 135 to be inserted is welded and installed.

Each end plate 134 is fixed by being supported on the inner reinforcement beam 113 and the support girder (not shown), and the upper and lower portions between the wire mesh formwork 118 except for the position of the end plate 134. Installed through the connecting bars (129a, 129b).

The upper and lower connecting reinforcing bars 129a and 129b are connected to the slab space and the underground retaining wall space in the same manner as in the first embodiment, thereby structurally connecting the slab 102 and the underground retaining wall which are constructed in the future.

In addition, the studs 128 are welded to the upper surface of the inner reinforcement beam 113 at equal intervals along the longitudinal direction as in the first embodiment.

As a result, the retaining wall 100 and the slab 102 are connected to the inner reinforcement beam 113 and the stud 128 by a lower bracket, support beam and support girder (not shown), and the basement retaining wall and the slab 102 are The strut 123, the end plate 134, the stud 135, and the connecting bars 129a and 129b are connected to each other.

On the other hand, Figure 17 is a perspective view showing a fourth embodiment of the slab construction structure according to the present invention, Figure 18 is a partial plan view showing a fourth embodiment of the slab construction structure according to the present invention, Figure 19 is 18 is a cross-sectional view taken along the line 'F-F' in FIG. 18.

20 is a cross-sectional view showing various examples of the grating support frame manufactured by varying the shape of the end plate in the fourth embodiment according to the present invention, and FIG. 21 is a cross-sectional view of the cross rebar in the fourth embodiment according to the present invention. It is a top view which shows the various example of the grating support frame manufactured by changing an arrangement direction, and FIG. 22 is a top view which shows the installation example of the grating support frame shown in FIG.

And, Figure 23 is a cross-sectional view showing an example of the grating support frame manufactured by allowing the cross bars to penetrate the upper and lower middle portions of the flat bar in the fourth embodiment according to the present invention.

The fourth embodiment is a support frame structure 120 which is installed between the retaining wall 100 and the slab space in the underground retaining wall space, and compared with the first embodiment, the wales supporting the wales, the struts, and the supporting members. Instead of using a mold, there is a difference that a grating support frame 141 consisting of a flat bar 144b, a cross reinforcing bar 144c, and end plates 142a and 142b is used.

Except for using the grating support frame 141 in place of the wales support frame in the fourth embodiment, the remaining components are the same as in the first embodiment described above.

The grating support frame 141 has a structure similar to a known form of grating that is already widely used in road sewers, etc. The structure thereof will be described in more detail as follows.

Each of the grating support frames 141 is disposed side by side at equal intervals between the two end plates 142a and 142b on both sides disposed side by side, and the ends are end plates 142a and 142b. A plurality of flat bars (144b) fixedly installed at the side) and a plurality of cross bars (144c) disposed laterally with respect to the flat bars (144b) and fixedly installed at upper and lower portions of the flat bars (144b), respectively. It consists of.

Here, the cross bars 144c are directly fixed to the upper and lower portions of the flat bars 144b arranged at equal intervals, and the flat bars 144b and the cross bars 144c are formed at each grating support frame 141. It is fixed in a lattice structure between two end plates 142a and 142b on both sides.

The grating support frame 141 is manufactured by combining the cross bars 144c and the flat bars 144b of strength and dimension appropriately considering the required support load, and the two end plates on both sides of each grating support frame 141. As 142a and 142b, as shown in FIG. 20, one selected from an angle of a 'c' cross section, a channel member (c-beam), a flat plate, or a mixture of the selected two may be used.

In addition, in order to reduce the amount of cross bars used, instead of using the grating support frame shown in FIG. 20, the cross bars 144c are formed by penetrating the upper and lower middle portions of the flat bar 144b as shown in FIG. 23. Another form of grating support frame 141 may be used.

The support frame structure 120 between the retaining wall 100 and the slab 102 by welding and fixing a plurality of grating support frames 141 having the above-described structure continuously on the inner reinforcement beams 113 and the upper bracket 119. Will be configured.

In fixing the grating support frame 141, one end plate 142a is welded by being supported on the inner side reinforcement 113 to the outside of the wire mesh formwork 118 on the interface of the slab 102, and the end of the other side. The plate 142b is laterally supported by two adjacent upper brackets 119 to be welded.

In addition, in installing the support frame structure 120, various types of grating support frame 141 illustrated in FIG. 21 can be used in combination, and the arrangement direction of the cross bars 144c is perpendicular to the flat bar 144b. Grating support frame of inclined arrangement type (TYPE B, TYPE C) produced by arranging the orthogonal type (TYPE A) and cross reinforcing bars (144c) in an inclined direction with respect to the flat bar (144b). 141 may be used.

Here, as the inclined arrangement type grating support frame, grating support frames 141b and 141c of two types (TYPE B and TYPE C) having opposite arrangement directions of the cross bars 144c may be used.

FIG. 22 schematically illustrates an example in which orthogonal and inclined grating support frames 141 are installed in combination, and the inclined batch grating support frames TYPE B and TYPE C prevent crushing during unbalanced earth pressure. In order to be used in combination with orthogonal grating support frame (TYPE A) to the required portion as shown in FIG.

In addition to using the grating support frame 141 in the fourth embodiment, the upper bracket 119, the lower bracket 111, the support beam 112, the support girder 110, the deck plate 116, the wire mesh structure Each configuration of the inner reinforcement beam 113, the stud, the connecting reinforcing bar, and the back filling part 125a is the same as in the first embodiment.

Here, the back filling portion 125a is constructed between the retaining wall 100 and the end plate 142b of the grating support frame 141 to transmit earth pressure between the grating support frame 141 with the retaining wall 100. And, it is preferable to construct in the form of a plain concrete backfill so that an even earth pressure can be transmitted to the entire surface of the end plate 142b of the grating support frame 141.

19 shows an example in which the channel member is used as the end plate 142b fixedly supported by the upper bracket 119, and the end plate 142b of the channel member has a different opening direction as in the wale of the first embodiment. It can be installed as shown in (a) drawing or (b) drawing.

In the example of (a) of FIG. 19, the opening direction of the end plate 142b is directed toward the slab 102, and the concrete is backfilled between the outer side of the end plate 142b and the wall of the wall 100. do.

On the other hand, in the example of (b), the opening direction of the end plate 142b is directed toward the retaining wall 100, and concrete between the retaining wall 100 including the inner space of the end plate 142b. Is backfilled.

The process of constructing the slab 102 and the basement retaining wall 103 using the slab construction structure 104 of the second to fourth embodiments is performed in the case of using the slab construction structure 104 of the first embodiment described above. It is carried out in accordance with

That is, after installing the slab construction structure 104 including the support frame structure 120, the slab 102 is pre-installed, and later the formwork and vertical reinforcing bars (131a, 131b) is installed and then the basement retaining wall (103) After the construction process, both edge beams are deleted and at the same time, only one junction surface between the upper and lower retaining walls is generated for the basement retaining walls of the upper and lower layers, so that leakage can be effectively prevented.

As described above, according to the slab construction structure of the underground structure according to the present invention and the slab and underground retaining wall construction method omitted the edge beam using the same has the following advantages.

1) The elimination of the edge ribs eliminates the need for plywood formwork and bundling, thereby eliminating the problems associated with its use, thus significantly improving workability.

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

3) All problems caused by the construction of the rim beam can be eliminated, such as eliminating the need for carpentry work, formwork dismantling work, etc., thus simplifying installation work, improving workability and reducing air, and reducing costs.

4) By eliminating the edge ribs, it is possible to reduce the amount of stirrups and reinforcement bars and to reduce the thickness of the slab.

5) In the past, as the rim beam was necessarily installed between the upper and lower basement retaining walls, the joint surface causing leakage problems occurred between the rim compensation, the lower surface and the retaining wall. Although the gap of the liver was pointed out as a big problem, only one joint surface (construction joint) occurs between the upper and lower retaining walls due to the deletion of the rim beam, which is more effective in preventing leakage.

6) It is economical because there is no need for connecting reinforcing bar between the conventional rim beam and upper and lower retaining wall, and the amount of reinforcing bar is reduced. Lose.

Claims (16)

In the slab construction structure of the basement floor including a support girder and a deck plate, A support girder having one end inserted into the underground retaining wall space and supported by the girder support means installed in the H-pile of the retaining wall; An inner reinforcement beam having end portions fixed to one end of two adjacent support girders through a gusset plate at the same height as the support girders and installed between the support girders; A deck plate installed in the slab space while being supported on the support girder and the inner reinforcement beam; Forming means for slab interface forming on the support girder and the inner reinforcement reinforcement along the interface between the slab space and the underground retaining wall space to enable pre-installation of the slab and post-installation of the base retaining wall; A support frame structure connected and installed between the retaining wall and the slab space in the underground retaining wall space to enable the force transfer between the retaining wall and the slab; Slab building structure of the underground structure comprising a. The method according to claim 1, The support frame structure is composed of a plurality of wale support frame that is continuously disposed between the retaining wall and the slab space, each of the wale support frame, A wales welded to be supported transversely on the upper brackets installed on the H-pile of the retaining wall, and having a backfill portion installed for transferring earth pressure between the retaining wall; A plurality of struts having one end welded to the wale and the other end connected to the support girder and the slab above the inner stiffener through the formwork; Slab construction structure of the underground structure, characterized in that consisting of. The method according to claim 2, A slab construction structure for an underground structure further comprising a plurality of torsion preventing brace member is installed in the oblique direction between two adjacent struts. The method according to claim 2, The wale is a c-beam, the c-beam is installed so as to open toward the slab or earth walls wall slab construction structure of the underground structure. The method according to claim 2, The structure means for slab construction of the underground structure, characterized in that the formwork means is a wire mesh formwork is installed along the entire boundary surface, each strut is inserted into the slab space through the wire mesh formwork. The method according to claim 2, The formwork means is a wire mesh formwork that is installed along the interface of the boundary surface, individual end plates are welded to the other end of each strut so that the end plates are fixedly supported on the support girder and the inner reinforcement beams, The slab construction structure of the underground structure, characterized in that the stud is inserted into the slab space penetrating the wire mesh formwork on the rear surface. The method according to claim 1, The support frame structure is composed of a plurality of grating support frame is arranged between the earth wall and the slab space, each grating support frame is fixed to the end plate with two end plates on both sides, between the two end plates And a plurality of flat bars which are installed in a plurality of flat bars which are fixed laterally with respect to the flat bars, wherein an end plate on one side of the two end plates is disposed on the inner side reinforcement outward of the formwork means and on the other end plate. Structural slab construction structure of the underground structure, characterized in that the side wall is supported horizontally on the neighboring upper brackets while having a backfill for earth pressure transmission between the wall and the. The method according to claim 7, Slab construction of the underground structure, characterized in that the formwork means is a wire mesh formwork is installed along the entire boundary surface, connecting rods penetrating the wire mesh formwork connected to the base retaining wall space and the slab space above the grating support frame Structure. In the method of constructing the slab and basement retaining wall of the basement layer, (a) installing a retaining wall along the boundary of the building to be constructed, and constructing a frame pillar in the inner ground thereof; (b) exploding the ground of the soil wall to expose the upper portion of the soil wall and the frame pillar; (c) Each support girder is supported by the support beam and the bone by installing a lower bracket on the corresponding H-pile of the retaining wall, and then installing a support beam on two adjacent lower brackets, and then supporting and fixing one end on the support beam. Installing between quiet columns; (d) fixing the inner reinforcement beams through the gusset plate at the same height as the support girder between one end of each neighboring two support girders installed between the retaining wall and the frame pillar; (e) installing a deck plate in the slab space above the support girder and the inner reinforcement beams; (e) Forming means for forming the slab interface along the interface between the slab space and the underground retaining wall space on the support girder and the inner reinforcement beam, and connecting the support frame structure between the retaining wall and the slab space in the underground retaining wall space Steps; (g) constructing the slab by placing concrete in the slab space bounded by the formwork means; (h) constructing the slabs of the entire basement layer by repeating step (b) to (g) down to the lower layer step by step; (i) after installing the formwork of the basement retaining wall, pouring concrete to perform the net construction of the basement retaining wall while going up from the lower floor to the upper floor; Slab and basement retaining wall construction method is omitted, characterized in that it comprises a border beam. The method according to claim 9, In the step (e), a plurality of wale support frames are prepared by installing the wire mesh formwork along the boundary surface of the formwork means and installing the struts in the wales as the support frame structure in the basement wall space in the basement wall space and slab space. It is arranged continuously between each other, while supporting each of the wales laterally on the upper brackets installed on the H-pile of the retaining wall, while inserting the end of each strut through the wire mesh formwork into the slab space, The slab and the base retaining wall construction method, the rim beam is omitted, characterized in that the back fill portion for constructing the earth pressure between the wale. The method according to claim 10, Construction method of the slab and basement retaining wall is omitted, characterized in that the welding to install the torsion prevention support member in the oblique direction between the adjacent struts. The method according to claim 9, In the step (e), the formwork means to install a wire mesh formwork along the interface between the boundary, and as a support frame structure a plurality of grating support frame in the basement wall wall space between the retaining wall and the slab space, both sides of the Using a grating support frame consisting of two end plates and a plurality of flat bars whose ends are fixedly fixed to the end plates between the two end plates, and a plurality of cross bars which are fixedly fixed to the flat bars laterally. The end plate on one side of the end plate is fixedly supported on the inner reinforcement beams to the outside of the formwork means on the upper brackets installed on the H-pile of the wall, while the end wall and the other end plate are fixed. It is characterized by constructing a back-filling part for earth pressure transmission therebetween. The slab construction structure of the underground structure. The method according to claim 12, Slab and underground retaining wall construction method, characterized in that the connecting beams through the wire mesh formwork in the base retaining wall space and the slab space through the grating support frame is installed. The method according to claim 12, Slab and underground retaining wall construction method, the cross-beams are omitted, characterized in that using the grating support frame is fixed to the upper and lower portions of the flat bar. The method according to claim 12, Slab and underground retaining wall construction method, the edge beam is omitted, characterized in that using the grating support frame through the cross bars through the upper and lower middle portions of the flat bar. The method according to claim 12, As the support frame structure, an edge grating support frame in which cross bars are disposed at right angles to a flat bar and an inclined arrangement type grating support frame in which cross bars are inclined with respect to the flat bar are omitted. Slab and underground retaining wall construction method.

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