KR20200031790A - Self-standing Form System for Constructing Anchored Retaining Walls and Anchored Retaining Walls Constructing Method Using the Same - Google Patents

Abstract

The present invention relates to a mold supporting structure which can effectively support the lateral pressure of retaining wall concrete with a self-standing structure without an additional support in a ground reinforcing composite wall type RC retaining wall in which an RC retaining wall is monolithically constructed on a slope reinforced by a ground reinforcing material, and a method for constructing a ground reinforcing composite wall type RC retaining wall desirably using the same. To this end, as for the construction of a composite wall type retaining wall in which an RC retaining wall is monolithically formed on a slope reinforced by a ground reinforcing material, provided is a self-supporting mold supporting structure for a ground reinforcing composite wall type RC retaining wall, which comprises: a ground reinforcing material which is introduced into and mounted on the ground, and of which a rear end portion is constructed to protrude from a slope; a retaining wall mold which is installed to be spaced apart from the slope; and a plurality of fastening support bodies which connect the rear end portion of the ground reinforcing material to the retaining wall mold in order to be installed to be clamped. Here, the fastening support bodies clamped by the ground reinforcing material hold the retaining wall mold to support the same. In addition, the retaining wall mold can be configured by comprising a retaining wall mold plate, a horizontal reinforcing material and a vertical reinforcing material. The fastening support bodies can be configured by comprising a half-foam tie and a support bolt.

Description

Self-standing Form System for Constructing Anchored Retaining Walls and Anchored Retaining Walls Constructing Method Using the Same}

The present invention provides a formwork support structure capable of effectively supporting the side pressure of the retaining wall concrete in a self-supporting manner without a separate brace, in a ground reinforced composite wall RC retaining wall that integrally constructs an RC retaining wall on a slope reinforced with a ground reinforcement material, and this formwork supporting structure. It is related to the construction method of the ground reinforced composite wall RC retaining wall which is preferably applied.

In the construction of roads, railroads, and residential complexes, the ground is cut or filled for efficient use of land. If the soil is not cut or filled, it will lead to the collapse of the ground, so a retaining wall is usually constructed to prevent this.

Reinforced concrete (RC) retaining walls are integrally constructed on slopes reinforced with ground reinforcement materials such as nails and anchors. The RC wall retaining wall is constructed by fixing the ground reinforcement to the ground and protruding to the slope, while reinforcing the reinforcing bar to the slope surface and laying the tip of the protruding ground reinforcement while constructing and curing the retaining wall concrete. Prior arts for such a retaining wall retaining wall include KR 10-0698758, KR 10-1126666, and KR 10-1244808.

The construction of a retaining wall formwork involves the installation of a retaining wall formwork. The retaining wall formwork is installed as a support structure that can stably support the side pressure of the retaining wall concrete. In general, the retaining wall formwork support structure is a method of installing a brace on the rear of the formwork plate as shown in FIG. 1 or patent KR 10-1209765. However, the brace installation method requires space for brace installation and also has a limitation on the height of the retaining wall.

KR 10-0698758 B1 KR 10-0812243 B1 KR 10-1209765 B1

The present invention was developed to improve the disadvantages of the conventional formwork installation in the ground reinforced plywood RC retaining wall, and has a technical problem in providing a self-supporting formwork supporting structure of the ground reinforced plywood RC retaining wall that can stably support the side pressure of the retaining wall concrete. have.

In addition, the present invention has a technical problem to provide a self-supporting formwork support structure of a ground reinforced RC wall retaining wall that can be applied to the ready-made parts almost as it is.

Furthermore, the present invention has a technical problem in providing a construction method of a ground reinforced plywood type RC retaining wall that can be constructed while stably supporting concrete side pressure without a separate brace during the process of constructing a ground reinforced plywood type RC retaining wall.

In order to solve the above technical problem, the present invention, in the construction of a retaining wall of the RC retaining wall integrated with a slope reinforced on a slope reinforced with a ground reinforcing material, the ground reinforcement is constructed so that the rear end protrudes from the slope while intrusively fixing the ground; Retaining wall formwork spaced apart from the slope; A ground reinforcement composite wall RC retaining wall, characterized in that, by connecting the rear end of the ground stiffener and the retaining wall formwork, a plurality of binding supports which are long-stretched is installed, and the binding support that is tightly attached to the ground reinforcement is supported by holding the retaining wall formwork. It provides a self-supporting formwork support structure. Here, the retaining wall formwork may include a retaining wall formwork plate, a horizontal reinforcement material, and a vertical reinforcement material, and the binding support may include a half form tie and a support bolt.

In addition, the present invention is a method of constructing a ground reinforced plywood type RC retaining wall while applying a self-supporting formwork support structure of a ground reinforced plywood type RC retaining wall, while constructing a ground reinforcement on a slope, while installing a drain plate in contact with the slope, a slope pressure plate on the ground reinforcement The first step of installing; A second step of reinforcing the retaining wall reinforcement; A third step of installing a retaining wall formwork while installing a binding support; A fourth step of curing and pouring retaining wall concrete between the slope and the retaining wall formwork; A fifth step of removing the retaining wall formwork by releasing the binding support; provides a construction method of a ground reinforced RC wall retaining wall characterized in that it comprises a.

The present invention can be expected the following effects.

First, in the reinforced concrete wall retaining wall type RC retaining wall, it is possible to support the retaining wall formwork with the ground fixing power of the ground reinforcing material because it is tightly bound between the ground reinforcement material and the retaining wall formwork, so that the side pressure of the retaining wall concrete can be stabilized without additional support. Can be supported, thereby simplifying the formwork.

Second, since the formwork of the ground reinforced plywood type RC retaining wall can be carried out in a brace-free manner, it is easy to construct the ground reinforced plywood type RC retaining wall even in a confined space, and also supports the retaining wall formwork by directly binding to the ground reinforcement material. Therefore, as long as the ground reinforcement is constructed according to the structural design, it is possible to stably construct the ground reinforced composite wall RC retaining wall in a brace-free manner without limitation to the construction height.

1 is a photograph showing a conventional formwork installation state in the construction of a ground reinforced RC wall.
2 and 3 is a construction cross-sectional view of the ground reinforced siding wall type RC retaining wall to which the self-supporting formwork support structure of the ground reinforced siding wall type RC retaining wall according to the present invention is applied.
4 is a front view of the installation state of the binding support in FIG.
5 is a front view of the installation state of the retaining wall formwork in FIG.

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

2 and 3 is a construction cross-sectional view of a ground reinforcement siding wall type RC retaining wall to which a self-supporting formwork support structure of a ground reinforcement siding wall type RC retaining wall according to the present invention is applied, and FIG. 4 is a front view of the installation state of the binding support in FIG. 2, 5 is a front view of the installation state of the installation state of the retaining wall formwork in FIG.

The self-supporting formwork support structure of the ground reinforced plywood RC retaining wall according to the present invention is characterized in that the retaining wall formwork is installed in a self-supporting manner in the construction of a plywood retaining wall in which the RC retaining wall is integrated on the slope S reinforced with the ground reinforcement 110. have. To this end, in the present invention, the connection between the ground reinforcement 110 and the retaining wall formwork is connected by a binding support. Specifically, the present invention is composed of a ground reinforcement 110, a retaining wall formwork, and a plurality of binding supports.

The ground stiffener 110 is constructed to protrude from the ground while protruding from the slope (S), and is constructed with appropriate nails, earth anchors, rock bolts, etc. according to the structural design according to the conventional slope reinforcement method. You can do it. In FIG. 2, the ground reinforcement 110 by the nail 111 having a threaded portion is intrusively installed in the ground and is settled and constructed by the grout material 114.

The retaining wall formwork is for forming the wall surface of the retaining wall and is installed spaced apart from the slope S, and the wall formwork applied to the wall construction can be applied as it is. In the present invention, as an embodiment, a retaining wall formwork including a retaining wall formwork plate 210, a horizontal reinforcement 220, and a vertical reinforcement 230 is proposed.

In the retaining wall formwork, the retaining wall formwork plate 210 may be applied with a plywood formwork. The retaining wall formwork plate 210 may be provided as a patterned formwork or a paint may be designed and applied to the inner surface. When such a retaining wall formwork plate 210 is used, the RC retaining wall is patterned on the surface or as a retaining wall of various colors or designs. It can be constructed.

In the retaining wall formwork, the horizontal stiffener 220 and the vertical stiffener 230 are members installed to reinforce the retaining wall formwork plate 210, and the horizontal stiffener 220 is installed in parallel in the horizontal direction from the rear of the retaining wall formwork plate 210. The vertical reinforcement 230 is installed in parallel in the longitudinal direction to support the horizontal reinforcement 220 installed in parallel behind the horizontal reinforcement 220. The horizontal reinforcing material 220 and the vertical reinforcing material 230 may be applied to the materials used in the existing plywood formwork. Preferably, the horizontal reinforcing material 220 is a steel pipe, and the vertical reinforcing material 230 is suitable for each material. . The material specifications and installation intervals of the horizontal reinforcement 220 and the vertical reinforcement 230 are appropriately determined according to the structural calculation.

The binding support is installed long while connecting the rear end of the ground reinforcement 110 and the retaining wall formwork. This is to support the retaining wall formwork from all sides by supporting a plurality of binding supports connected to one ground reinforcement 110. Since the ground stiffener 110 is intrusively settled in the ground, the ground anchoring power of the ground stiffener 110 is transmitted to the retaining wall formwork through a binding support medium to support the retaining wall formwork. If the retaining wall formwork is composed of a retaining wall formwork plate 210, a horizontal reinforcement 220, and a vertical reinforcement 230, the binding support is connected to the rear end of the ground reinforcement 110 as shown in FIGS. 2 and 3, while the retaining wall It penetrates the formwork plate 210 and is connected to the vertical reinforcement 230.

The present invention proposes a preferred embodiment of the binding support to which the existing formwork parts can be applied as it is, the binding support as shown in Figure 2 may be composed of a half-form tie 310 and the support bolt 320. The half form tie 310 is composed of a separating bolt 311, a cone nut 312, a cone bolt 313, and a fixing nut 315, which is tightly installed in the retaining wall formwork, and the supporting bolt 320 is a half form tie. Sepabol bolt 311 and the ground reinforcement 110 is connected to the rear end is installed tightly. Half form tie (310) if the structure, in which the wall formwork is installed symmetrically with a nut, a separating bolt in the middle to support the wall formwork facing the existing wall formwork facing each other. It can be said that it consists of half of the existing form tie to support the retaining wall formwork installed on one side only. The half-form tie 310 may be installed between the cone bolt 313 and the fixing nut 315 to further include an acupressure washer 314 to effectively acupressure the vertical reinforcement 230. The support bolt 320 is attached to the slope S, where the formwork is not installed, by the ground reinforcement 110 and welding. The support bolt 320 is suitable to be provided with a reinforcing bar or a steel bar, and these support bolts 320 are disposed across the RC retaining wall together with the separating bolts 311 to be buried in the RC retaining wall, and thus serve as a shear muscle of the RC retaining wall. . As a result, the side pressure of the retaining wall concrete transferred to the retaining wall formwork by pouring retaining wall concrete (WC) is supported by the ground reinforcement 110 by a binding support.

The binding support is installed in an appropriate number and position according to the structural calculation. In FIGS. 3 and 4, eight support bolts 320 from one ground stiffener 110 are installed to extend up, down, left, and right in all directions, and two to one theta bolt 311 between neighboring ground stiffeners 110. It is confirmed that the support bolts 320 are installed at the same time. In addition, in FIG. 5, a state in which the binding support is attached to the vertical stiffener 230 at a predetermined interval at a position between the horizontal stiffeners 220 is confirmed.

Furthermore, the self-supporting formwork support structure of the ground reinforced RC wall retaining wall according to the present invention may further include an end hardware 340 and an anti-milling material 240. End hardware 340 is installed to protrude over the foundation (F) or ground floor while being embedded in the foundation (F) or ground floor, in Figure 2, the L-shaped bent reinforcing bar (inner iron rod) is installed as the end hardware 340 Doing. The anti-glare material 240 is installed on the foundation F or the ground floor between the bottom part of the retaining wall formwork and the end hardware 340, and it is suitable to be provided with each material like the vertical reinforcement 230. The end hardware 340 and the anti-slip material 240 prevent the retaining wall formwork plate 210 from being pushed back when the side pressure of the retaining wall concrete acts on the retaining wall formwork plate 210, thereby maintaining a stable installation state.

On the other hand, the present invention proposes a method for constructing a ground reinforced plywood type RC retaining wall while applying the self-supporting formwork support structure of the ground reinforced plywood type RC retaining wall. Referring to Figure 3 will be described the construction method of the ground reinforced RC wall retaining wall according to the present invention.

First, the ground reinforcement 110 is installed on the slope S, while the drain plate 120 is installed in contact with the slope S, and the slope pressure plate 130 is installed on the ground reinforcement 110 (first step). This step may be referred to as a step of performing a slope reinforcement construction. If necessary, for the stabilization of the slope S, a wire mesh 140 and a shotcrete 150 are further installed between the drain plate 120 and the slope pressure plate 130. can do.

The ground reinforcing material 110 may be constructed with a rock bolt, nail, earth anchor, or the like, and when installing with a nail 111, for example, a spacer 112 is installed on the nail 111 to penetrate the ground drilling hole. After the grouting material 114 through the injection tube 113 can be constructed by the injection method. The drain plate 120 is installed in contact with the slope S to discharge ground surface water, and according to the installation of the drain plate 120, it is possible to suppress the penetration of groundwater into the RC retaining wall, thereby maintaining the structural stability of the RC retaining wall. have. The slope acupressure plate 130 is installed through the rear end of the ground reinforcement 110 so as to press the slope S, and is fixedly installed with a fixing nut 115 or the like. The ground pressure of the slope pressure plate 130 is transmitted to the slope S, whereby the slope S is stably reinforced by the ground reinforcement 110. The spacing and length of the ground reinforcement 110 is determined according to the structural design. After the ground reinforcement 110 is constructed, the retaining wall foundation F may be installed on the ground floor as necessary. The retaining wall foundation F is constructed in the same manner as the retaining wall in RC, and the end hardware 340 may be installed if necessary in the construction process.

Then, the retaining wall reinforcement (WR) is reinforced (second step). Retaining wall reinforcing bar (WR) can be reinforced by assembling reinforcing bars into a grid, and a connector 330 can be connected to and installed on the slope pressure plate 130 to fix the position of the retaining wall reinforcing bar (WR). In FIG. 3, a connector 330 composed of a connection bolt 331 and a connection acupressure plate 332 is illustrated, and the connector 330 connects the connection acupressure plate 332 and the slope acupressure plate 130 with a connection bolt 331 Is the way to do it. According to the installation of the connector 330, the retaining wall reinforcing bar WR can be fixed to the connection bolt 331 or the connection acupressure plate 332 to fix the reinforcement position easily. The connecting acupressure plate 332 also serves as a pressure plate that acupressures the entire slope of the RC retaining wall when the retaining wall concrete (WC) is cast and integrated.

Next, a retaining wall formwork is installed while the binding support is installed (step 3). If a retaining wall formwork composed of a retaining wall formwork 210, a horizontal reinforcement 220, and a vertical reinforcement 230 and a binding support consisting of a half form tie 310 and a support bolt 320 is installed, the support bolt 320 is supported. Long-term installation by welding or the like on the reinforcing material 110, the half-form tie's sepa-bolt 311 is connected to the support bolt 320 by welding or the like, and the sepa-bolt 311 is fastened with a nut 312 and retaining wall In the state in which the formwork plate 210 is installed in contact with the cone 312, the corn bolt 313 is penetrated through the retaining wall formwork plate 210 and fastened to the cone 312, and the horizontal reinforcement 220 and the vertical reinforcement ( 230) is installed, and after installing the shiatsu washer 314 on the cone 312, the fastening nut 315 is fastened to the vertical reinforcement 230 while being fixed. In this step, the anti-glare material 240 may be further installed, and the anti-glare material 240 may be installed between the retaining wall formwork plate 210 and the pre-installed end hardware 340.

Finally, the retaining wall concrete (WC) is poured and cured between the slope (S) and the retaining wall formwork (step 4), and the retaining wall formwork is removed by loosening the binding support (step 5). This completes the ground reinforced RC wall.

In the above, the present invention has been described in detail with reference to specific embodiments, but since the embodiments are only for illustrating the present invention, the substituted, added and modified embodiments are also within the scope without departing from the technical spirit of the present invention. It will be said to fall within the protection scope of the present invention as defined by the appended claims.

S: slope
F: Basic
WR: Retaining wall reinforcement WC: Retaining wall concrete
110: ground reinforcement 120: drain plate
130: slope acupressure plate 140: Ymesh
150: shotcrete
210: retaining wall formwork 220: horizontal reinforcement
230: vertical reinforcement 240: anti-jungle
310: Half form tie 311: Sepabolt
312: corn 313: corn bolt
314: Shiatsu washer 315: Fixing nut
320: support bolt
330: connector 331: connecting bolt
332: Connection acupressure plate
340: end hardware

Claims (6)

In the construction of a retaining wall with an RC retaining wall integrated on a slope S reinforced with a ground reinforcement 110,
Ground reinforcement 110 is constructed to protrude from the slope (S) while intrusively settled on the ground;
Retaining wall formwork spaced apart from the slope S;
A plurality of bundling supports which are installed long while connecting the rear end of the mall ground reinforcement 110 and the retaining wall formwork;
A self-supporting formwork support structure of a ground reinforced composite wall RC retaining wall, comprising: a binding support coupled to the ground reinforcement 110 to hold and support the retaining wall formwork. In claim 1,
The retaining wall formwork, the retaining wall formwork plate 210 spaced apart from the slope (S); A horizontal reinforcement member 220 installed in parallel in the horizontal direction to support the retaining wall formwork plate 210 behind the retaining wall formwork plate 210; It is configured to include; vertical reinforcement 230 is installed in parallel in the longitudinal direction to support the horizontal reinforcement 220 installed in parallel behind the horizontal reinforcement 220;
The bundling support is composed of a sepabolt 311, a cone 312, a cone bolt 313, and a fixing nut 315, penetrates the retaining wall formwork plate 210, and is attached to the vertical reinforcement 230 in half. Form tie 310; A support bolt 320 which is installed while connecting the rear end portion of the ground reinforcement 110 with the separating bolt 311 of the half form tie;
Self-supporting formwork support structure of a ground reinforced RC wall retaining wall, characterized in that it is composed of. In claim 2,
The half-form tie 310 of the binding support is characterized in that it further comprises a pressure washer 314 installed to acupressure the vertical reinforcement 230 between the cone bolt 313 and the fixing nut 315, Self-supporting formwork support structure of ground reinforced RC wall retaining wall. In any one of claims 1 to 3,
An end hardware 340 installed to be protruded while being embedded in the foundation F or the ground floor;
An anti-slip material 240 installed on a foundation F or a ground floor between the bottom part of the retaining wall formwork and the end hardware 340;
A self-supporting formwork support structure of a ground reinforced RC wall retaining wall, characterized in that it further comprises a. A method of constructing a ground-reinforced ply-type RC retaining wall while applying a self-supporting formwork support structure of the ground-reinforced ply-type RC retaining wall according to any one of claims 1 to 3,
The first step of installing the ground reinforcement 110 on the slope (S), while installing the drain plate 120 in contact with the slope (S) to install the slope pressure plate 130 on the ground reinforcement (110);
A second step of reinforcing retaining wall reinforcement (WR);
A third step of installing a retaining wall formwork while installing a binding support;
A fourth step of curing the retaining wall concrete (WC) between the slope S and the retaining wall formwork;
A fifth step of removing the retaining wall formwork by releasing the binding support;
Construction method of the ground reinforced RC wall retaining wall, characterized in that comprises a. In claim 5,
The first step is made while further constructing the wire mesh 140 and shotcrete 150 between the drain plate 120 and the slope acupressure plate 130,
The second step is made while connecting and installing the connector 330 for fixing the position of the reinforcement of the retaining wall reinforcing bar WR to the slope acupressure plate 130,
In the third step, while being embedded in the foundation (F) or the ground floor, the end hardware 340 is further installed so that the upper part protrudes and is pushed on the foundation F or the ground floor between the bottom end of the retaining wall formwork and the end hardware 340. Construction method of the ground reinforced composite wall RC retaining wall, characterized in that made while further installing the prevention material (240).

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