KR20080100740A - Strut system of temporary plate with opening supporting temporary retaining wall and subgrade external wall construction method utilizing the same - Google Patents

Abstract

A reverse supporting structure of retaining wall is provided to remove the temporary installation open board after the buried slab is cured. A reverse supporting structure of retaining wall comprises a retaining wall(10), a beam(20) which is installed to the retaining wall, a reinforced concrete slab which is under construction in order to directly support the retaining wall. The reinforced concrete slab contacts the retaining wall and is classified into the bury slab(30a) embedded in the basement outer wall(50) and the exposure slab(30b) exposed from the basement outer wall. The temporary installation open type board material the part or the whole is removed after the curing of the bury slab.

Description

Strut system of temporary plate with opening supporting temporary retaining wall and subgrade external wall construction method utilizing the same}

Figure 1 is a plan view (a) and a cross-sectional view (b) to (e) according to the construction sequence showing an embodiment using a buried slab in the reverse support structure of the retaining wall for the continuous construction of the conventional underground plywood.

2 is a view showing an embodiment of a buried formwork plate conventionally applied.

3 is a plan view (a) and a cross-sectional view (b) showing a general embodiment of a method of bonding and installing a beam constructed in the conventional retaining wall side to a concrete permanent structure.

Figure 4 is a plan view (a), cross-sectional view (b), a perspective view (c), a cross-sectional view showing an embodiment of the reverse support structure of the retaining wall for the continuous construction of the underground plywood using the temporary open plate according to the present invention (( d) to (e)).

5 is a view showing various embodiments of the hypothetical open plate applied in accordance with the present invention.

6 is a plan view (a) and cross-sectional views (b) to (d) showing various installation examples of the beams constructed in the earth wall construction in the earthwork construction in accordance with the present invention.

<Description of Major Symbols in Drawing>

10: Block Wall 11: Thumb Pile

20: see 25: pedestal

30: reinforced concrete slab 30a: embedded slab

30b: exposed slab

40: embedded die plate 41a: vertical plate portion

41b: bottom plate portion 43: opening portion

50: outer wall

140: open temporary plate member 141a: protruding bottom plate portion

141b: pour bottom plate 142: truss wire

151: bracket 151a: right angle bracket

151b: inclined bracket

1 and 2 is a view showing an example of the basement support method for the slab supporting the retaining wall using a conventional buried formwork.

In this method, the following problems occur as the underground reverse work and the underground plywood work are carried out without removing the formwork board after the concrete is poured.

First, the purchase formwork plate is necessary for concrete pouring, but it is not necessary in the final state of the structure, so waste of resources is caused by the purchase, and the concrete placing load acting on the purchase formwork is transferred to the beam 20 separately. The cost is greatly generated due to the necessity of pre-fabrication and equipment for the installation of the support beam 25 and the reinforcement of the formwork plate. In addition, since the formwork is not dismantled, reinforcement review is necessary because the performance of adhesion with concrete decreases depending on the material.

3 is a general embodiment of a method of bonding and installing the beam 20, which is constructed to the wall of the retaining wall in the conventional underground reverse construction, to the concrete permanent structure 49. In order to construct the beam 20 by this method, a permanent structure 49 such as an RC rim ribbon is necessary at a height corresponding to the dance of the beam 20, and accompanying this, the permanent structure 49 is formed. Forming work is needed separately, which increases the construction period and construction cost.

The present invention has been made to improve the above-mentioned conventional problems, bringing cost savings through the recycling of hypothetical open plate material that removes part or the whole instead of the conventional formwork plate, and improves the adhesion performance with the subsequent underground wall, In order to provide a continuous construction method of the underground plywood of the building structurally stable by providing a load support type that can eliminate the mounting beam (25) needed to transfer the concrete placing load from the embedded formwork to the beam.

Another object of the present invention is to support the hypothetical open plate and to derive various construction methods to secure structural safety according to the thumb pile and the eccentricity of the beam to the construction of the earth wall wall construction site and economic feasibility To enhance.

The present invention to achieve the above object is the earth wall; A beam constructed toward the retaining wall; And, reinforced concrete slab which is constructed to be in close contact with the retaining wall above the beam and is constructed to directly support the retaining wall.

The reinforced concrete slab 30 is divided into a buried slab 30a which is buried in the basement outer wall while being in contact with an earthen wall and an exposed slab 30b which is exposed outside the basement outer wall, and the buried slab is a protruding bottom plate portion forming an opening ( 141a) and concrete is poured into the temporary opening plate member 140 formed of a pour bottom plate portion 141b in which the embedded slab is poured, and the opening 43 formed by the protruding bottom plate portion is a vertical reinforcing bar facing the basement outer wall. At the same time through the 51 is formed to the size that can be reinforcement, the hypothesis-opening plate is a back support structure of the earth wall for the continuous construction of the underground plywood, characterized in that part or all of the removal after curing of the buried slab to provide.

According to another object of the present invention, the beam 20 which is constructed on the retaining wall 10 side while supporting the hypothetical open plate member has structural safety, workability, and economical efficiency according to the eccentricity of the thumb pile 11 and the beam 20 of the retaining wall. Retaining wall to derive various construction methods that can be secured; Thumb pile of the earth wall; A beam constructed toward the retaining wall; In the reverse support structure of the basement wall comprising a; a bracket for bonding the thumb pile of the retaining wall and the beam according to the degree of eccentricity of the retaining wall to support the beam;

In the case of the eccentricity included in the structural safety according to the degree of eccentricity of the thumb pile 11 and the beam 20 of the retaining wall, the beam is directly eccentrically attached to the thumb pile without the bracket 151, or the eccentricity exceeds the structural safety. For the convenience of construction, the bracket 151a, 151b orthogonally or inclinedly joined to the thumb pile of the retaining wall supports the beam 20. to provide.

In addition, the present invention comprises the steps of: (a) constructing the wall and installing the inner pillar; (b) digging to a predetermined depth; (c) constructing the interlayer horizontal structure of the beam and reinforced concrete slab as the horizontal support of the retaining wall while applying the reverse support structure of the retaining wall; (d) repeating steps (b) and (c) to complete the earth wall support frame by the interlayer horizontal structure up to the basement floor of the building; And, (e) reinforce the vertical rebar to pass through the opening of the embedded slab, and then install concrete through the opening of the embedded slab to purchase the one end of the beam and the embedded slab of the reinforced concrete slab. It provides a continuous construction method of the building underground plywood comprising the; step of building into an underground plywood in contact with the earth wall.

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

The present invention is a buried buried in the basement outer wall 50 while contacting the earth wall (10) using the temporary open plate 140 in the support structure of the underground earth wall wall is constructed so that the interlayer slab of the building basement supports the earth wall. By constructing the slab 30a so that the opening 43 is formed, interlayer continuous reinforcement of the vertical reinforcing bar 51 and interlayer continuous casting of concrete are possible in the construction of the basement outer wall 50, and the underground outer wall 50 and embedded There is a technical feature to improve the adhesion performance of the slab (30a) to complete the underground plywood with improved integrity. According to this technical feature, the present invention proposes a supporting structure of an underground mud wall and a continuous construction method of a building basement plywood applying the same.

1. Reverse support structure of underground retaining wall

4 is a view showing a reverse support structure of the basement wall in accordance with the present invention. In the underground reverse drilling method, the supporting structure of the underground retaining wall is the retaining wall (10); A beam 20 constructed toward the retaining wall 10; And a reinforced concrete slab 30 which is constructed to be in close contact with the retaining wall 10 above the beam 20 and is constructed to directly support the retaining wall 10. Concrete slab 30 serves as an interlayer horizontal structure supporting the retaining wall (10).

Specifically, in the present invention, the embedded slab (30a) is buried in the basement outer wall 50 while contacting the reinforced concrete slab 30 to the earth wall (10); and the exposed slab (30b) exposed outside the basement outer wall (50); To distinguish,

The embedded slab 30a is formed by pouring concrete over an exposed slab thickness to a temporary open plate member including a protruding bottom plate portion for forming an opening and a pouring bottom plate portion on which an embedded slab is poured, and formed by the protruding bottom plate portion. Is formed to a size that can pass through the vertical rebar (51) facing each other of the basement outer wall at the same time.

 When the embedded slab 30a is completed, the protruding bottom plate portion of the temporary open plate 140 is removed to be recycled, and the opening 43 made at this time is the interlayer continuous reinforcement of the vertical bars 51 of the basement outer wall 50 and the interlayer of concrete. It is used as a space for continuous casting.

4 (c) to (d) show that the protruding bottom plate portion 141a and the pouring bottom plate portion 141b are joined to the upper steel wire 142a and the lower steel wire 142b by the lattice steel wire 142c to form a truss structure or virendil. The truss wire 142 is made of a structure, and the truss wire 142 is installed between the beams 20 so that the conventional support beam 25 is not required. The truss wire 142 may be provided with a camber to alleviate the deflection, and the self-supporting wire 142d connected to the upper wire or the lower wire may be attached to support the truss wire between the beams 20. Can be. The upper wire, lower wire, lattice wire, freestanding wire of the truss wire 142 may use reinforcing bars, high-strength wire, circular or rectangular steel.

Figure 5 shows various embodiments of the temporary opening plate for the construction of the embedded slab (30a) in the reverse support structure of the retaining wall for the continuous construction of the underground plywood according to the present invention.

The temporary open plate member includes a protruding bottom plate portion for forming an opening of the embedded slab 30a and a pouring bottom plate portion on which the embedded slab is poured. After concrete is poured into the temporary open plate and the embedded slab is molded, the temporary open plate must be easily dismantled in order to be recycled.

5 (a) is a case of dismantling the protruding bottom plate upward, for this purpose, it is convenient that the bottom of the vertical plate of the protruding bottom plate part is narrow and the upper part has a wide trapezoidal shape. In addition, if the handle is installed near the upper end of the vertical plate of the protruding bottom plate can be conveniently used when dismantling.

The fixing of the protruding bottom plate part to prevent the flow of the protruding bottom plate part during concrete pouring for forming the embedded slab may be as follows. In the case of the closed type having no opening in the pouring bottom plate part, the protruding bottom plate part is fixed and placed on the pouring bottom plate part, and in the case of an open type having an opening, the protruding bottom plate part is inserted into the opening and fixed to the pouring base plate part. It can be fixed by connecting the upper part of the vertical plate part of the adjacent protruding bottom plate part with the lumber and the fixing part with or without openings, and can hold and fix the position by penetrating the fixing material to the handle near the upper end of the vertical plate. Can also be.

5 (b) is a case of dismantling the protruding bottom plate portion and the pouring bottom plate portion, it is also possible to fix the protruding bottom plate portion and the pouring bottom plate portion downward dismantling at the same time.

The opening formed by the protruding bottom plate part of FIG. 5 may be formed to a size that can be penetrated by simultaneously penetrating the vertical rebar 51 facing the basement outer wall, and may be manufactured to have a wall thickness or more. The opening 43 may be any shape such as a square, a triangle, and a cylinder, but a rectangular opening is preferable in consideration of workability.

The material of the hypothetical open plate may be made of plywood, plastic, FRP, steel sheet, rebar, rib lath, wire mesh, expanded metal, reticulated telescopic metal, or a combination of two or more. Do.

The hypothetical open plate member can be made into a structure that can be easily recycled and dismantled easily through the combination of the shape, fixing method, and material of the protruding bottom plate vertical member for each dismantling direction.

Figure 6 is a plan view (a) and a cross-sectional view showing various installation embodiments of the beam to be constructed in the earth wall wall in the underground reverse drilling according to the degree of eccentricity of the thumb pile 11 and the beam 20 of the earth wall in accordance with the present invention ( b). When the beam installed perpendicularly to the retaining wall like the beam 20a of FIG. 6 (a) is eccentrically installed in the direction of the thumb pile of the retaining wall like the beam 20b of FIG. 6 (a), the following structural problems occur. do. The length of the beam will be longer than the original design. As a result, the bending moment increases among the various member forces acting on the beam, thereby increasing the possibility of the beam becoming structurally unstable. In this case, the following relationship can be derived between the stress ratio (S.R), which is the ratio of the working stress to the allowable stress of the beam, and the thumb pile of the retaining wall and the eccentric angle (θ) of the beam. That is, the allowable maximum moment of the beam can be converted through the stress ratio S.R, and the beam length when the allowable maximum moment is applied can be calculated. Through this process, the allowable eccentricity (θ allow) is θ allow = TAN (1 / SR-1), and the allowable eccentricity (θ allow) is approximately 10 degrees according to the stress ratio of the conventional beams of 0.85, 0.9 and 0.95, respectively. , 6 degrees, 3 degrees can be seen. That is, by checking the stress ratio of the beam, it is possible to determine the limit of the beam member that can be directly bonded to the thumb pile.

When the thumb pile 11 and the beam 20 of the masonry wall are included in the structural safety through the above-described process, the thumb is eccentrically like the beam 20a of FIG. 6 (a) without an additional thumb pile and a bracket. It can be bonded to the pile, or the beam 20 can be mounted on the right angle bracket 151a as shown in the beam 20b of FIG. At this time, the connection between the thumb pile of the beam and the retaining wall is not related to the bolt joint or the weld joint, and when the right angle bracket 151a is used, there is no need for a separate joint. The beam 20 of FIG. 6 (a) may support the beam 20 by a bracket 151b that is inclinedly joined to the thumb pile of the retaining wall in the case of eccentricity exceeding structural safety. When the member force acting on the bracket of FIG. 6 is large, a method of reducing the member force may be used by supporting the beam 20 by using a tension member such as reinforcing bars, steel bars, and wire ropes on the structure of the upper layer, that is, the wall or beam. have.

6 (b) is a cross section when the beam 20a of FIG. 6 (a) is eccentrically joined to the thumb pile, and FIG. 6 (c) shows that the beam 20b of 7 (a) is a right angle bracket 151a. 6 (d) is a cross section when the beam 20 of 7 (a) is mounted on the inclined bracket 151b.

2. Construction method of building underground plywood

Figure 4 shows the construction sequence to complete the basement sump wall by applying the reverse support structure of the basement wall, with reference to this will be described the construction method of the building basement wall of the present invention.

(a) construction and installation of internal pillars

First, construct the retaining wall 10 on the boundary line where the building is installed, and install the column at the position of the inner pillar. The type of barrier wall 10 may be used, and FIG. 4 shows the barrier wall 10 constructed of CIP.

(b) excavation

Excavate to a predetermined depth. At this time, the excavation proceeds to the extent that the retaining wall 10 exposed to the outside can support the earth pressure sufficiently.

(c) Construction of interlevel horizontal structures

The interlayer horizontal structure of the beam 20 and the reinforced concrete slab 30 is constructed as a horizontal support of the retaining wall 10 while applying the reverse support structure of the above-mentioned underground retaining wall. The beam 20 is constructed so as to face the retaining wall 10, and may be in any form, such as steel frame, SRC, RC, PC, composite structure, and FIG. The reinforced concrete slab 30 is constructed so that the embedded slab 30a and the exposed slab 30b are distinguished, but the embedded slab 30a is constructed by applying a temporary open plate 140, and includes a reinforced concrete structure. It is possible.

In particular, when the truss wire 142 is used to construct the embedded slab 30a of the reinforced concrete slab 30 as shown in FIG. 4, the basement outer wall 50 at the end of the beam 20 in order to support the embedded die plate in FIG. 1. The mounting beam 25 to be installed at the same position as the inner line can be omitted.

(d) completion of supporting wall

Repeating the excavation step and the step (c) of the interlayer horizontal structure construction step of step (b) to complete the supporting wall 10 by the interlayer horizontal structure to the lowermost floor of the building.

(e) construction of plywood

When the retaining wall 10 supporting frame is completed, the basement outer wall 50 in contact with the retaining wall 10 is constructed. The construction of the basement outer wall 50 is to reinforce the vertical reinforcing bar 51 to pass through the opening of the buried slab (30a), and then cast concrete through the opening of the buried slab (30a) to the end of the beam 20 of the interlayer horizontal structure It consists of a method of embedding the buried slab 30a of the part and the reinforced concrete slab. Since the opening of the embedded slab 30a is sufficiently secured in the construction of the interlayer horizontal structure, the interlayer continuous reinforcement of the vertical reinforcing bar 51 of the basement outer wall and the interlayer continuous casting of concrete are possible through the opening. Thus, the basement outer wall 50 is constructed as a single underground plywood in contact with the retaining wall while strengthening the interlayer integrity.

According to the present invention as described above, in the support structure of the basement wall, the interlayer slab of the building basement is constructed so as to support the wall, using the hypothetical opening type plate with an opening formed in the buried slab which is buried in the basement outer wall while contacting the wall. To reduce costs, improve adhesion to subsequent underground walls, and eliminate the pedestals needed to transfer concrete pour loads from embedded formwork to beams. By providing a load bearing type, it is possible to provide an economical and structurally stable method of continuous construction of underground plywood in buildings.

In addition, the beam supporting the hypothetical open plate and constructed on the side of the retaining wall is directly connected to the retaining pile of the retaining wall and the retaining wall of the retaining wall to secure structural safety according to the eccentricity of the retaining wall. It can improve the workability and economic feasibility.

Claims (6)

Earthen wall; A beam constructed toward the retaining wall; And, reinforced concrete slab which is constructed to be in close contact with the retaining wall above the beam and is constructed to directly support the retaining wall. The reinforced concrete slab is divided into a buried slab that is buried in the basement outer wall and exposed slab exposed outside the basement outer wall while contacting the earth wall. The embedded slab is formed by pouring concrete having an exposed slab thickness or more onto a temporary open plate formed of a protruding bottom plate portion forming an opening and a pouring bottom plate portion on which an embedded slab is poured. The hypothesis-opening plate is part or all removed after curing of the embedded slab, The opening formed by the protruding bottom plate portion is a support structure of the earthquake wall for continuous construction of the underground plywood, characterized in that it is formed in a size that can be reinforced at the same time through the vertical reinforcing bar of the basement outer wall. In claim 1, The hypothetical open plate member is made of any one of plywood, plastic, FRP, steel plate, truss wire, rib lath, wire mesh, expanded metal, mesh telescopic (網 狀 展 網 狀 metal), or two or more composite production Inverted support structure of retaining wall for continuous construction of underground plywood. In claim 1, The beam supporting the hypothetical open plate member is eccentrically directly bonded to the thumb pile of the retaining wall according to the thumb pile of the retaining wall and the beam, supported by a right angle bracket or an inclined bracket, or constructed in two or more ways. Inverted support structure of retaining wall for continuous construction of underground plywood, characterized by the above-mentioned. In claim 1, The tentative open plate member is applied to a back wall support structure, characterized in that it is applied to the inner wall or core wall other than the embedded slab of the basement outer wall in contact with the underground wall. In claim 2, The truss wire is composed of a lattice wire to join the upper wire, the lower wire, the upper wire and the lower wire, the truss wire is a reverse support structure of the retaining wall, characterized in that using a circular or square steel. (a) constructing a retaining wall and installing an internal pillar; (b) digging to a predetermined depth; (c) constructing the interlayer horizontal structure of the beam and reinforced concrete slab as a horizontal support of the retaining wall while applying the reverse support structure of the retaining wall of any one of claims 1 to 5; (d) repeating steps (b) and (c) to complete the earth wall support frame by the interlayer horizontal structure up to the basement floor of the building; And, (e) Reinforce the vertical rebar to pass through the opening of the buried slab, and then cast concrete through the opening of the buried slab to embed the one end of the beam and the buried slab of the reinforced concrete slab in the interlayer horizontal structure, Constructing abutting underground plywood; Continuous construction method of building plywood underground, characterized in that comprises a.

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