KR20200040518A - 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 form system capable of effectively supporting the lateral pressure of retaining wall concrete in a self-standing type without a separate support in a ground-reinforced single-face wall type RC retaining wall that an RC retaining wall is integrally constructed on a slope reinforced with a ground reinforcement member, and a method for constructing a ground-reinforced single-face wall type RC retaining wall using the form system. According to the present invention, a self-standing form system for a ground-reinforced single-face wall type RC retaining wall comprises: the ground reinforcement member constructed while being inserted and settled in the ground so that a rear end thereof protrudes from the slope; a retaining wall form installed to be distanced from the slope; and a connector anchored and installed while connecting the rear end of the ground reinforcement member and the retaining wall form. The retaining wall form includes a retaining wall form plate, truss beams of a truss structure in which an inclined member is installed between a pair of horizontal members, and a vertical reinforcement member. The connector passes through the retaining wall form plate while being connected to the rear end of the ground reinforcement member to pass through between the truss beams disposed parallel to be fixed and installed on the vertical reinforcement member.

Description

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

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

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 back 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 RC wall, and the technical problem to provide a self-supporting formwork system of the ground reinforced RC wall 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 system 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 is in the construction of a retaining wall with an RC retaining wall integrated on a slope reinforced with a ground reinforcement, a ground reinforcement constructed such that the rear end protrudes from the slope while intrusively fixing the ground; Retaining wall formwork spaced apart from the slope; Consisting of, including; a retaining wall formwork, which is installed long while connecting the rear end of the ground reinforcement and the retaining wall formwork, the retaining wall formwork is a retaining wall formwork plate spaced apart from the slope; A truss beam installed in parallel in the horizontal direction to support the retaining wall formwork plate behind the retaining wall formwork plate as a member of the truss structure in which the inclined material is installed between the pair of horizontal members; It is composed of; including a longitudinal reinforcement installed in parallel in the longitudinal direction to support the truss beam installed in parallel behind the truss beam, the binding hole is attached to the rear end of the ground reinforcement, and through the retaining wall formwork plate between the truss beams arranged in parallel. Provided is a self-supporting formwork system of a ground reinforced RC wall retaining wall characterized in that it is fixedly installed in a longitudinal reinforcement.

In addition, the present invention is a method of constructing a ground reinforced plywood type RC retaining wall while applying the self-supporting formwork system of the ground reinforced plywood type RC retaining wall, while constructing a ground reinforcement on the slope and installing a drainage plate in contact with the slope while sloped on the ground reinforcement A first step of installing a pressure plate; A second step of reinforcing the retaining wall reinforcement; A third step of installing a retaining wall formwork while installing a binding hole; 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 hole; provides a construction method of a ground reinforced composite wall type RC retaining wall, characterized in that it comprises a.

The present invention can be expected the following effects.

First, in the RC reinforced wall construction of the ground reinforcement, the retaining wall formwork is composed of a reinforcement support structure by a truss beam, and at the same time, the retaining wall formwork is fastened to the ground reinforcement by means of a binding hole. It can support the retaining wall concrete side pressure, thereby omitting the brace for supporting the retaining wall formwork, simplifying the formwork construction.

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 narrow space, and also support the retaining wall formwork by directly binding to the ground reinforcement material. For this reason, as long as the ground reinforcement is constructed according to the structural design, it is possible to construct the ground reinforced plywood type RC retaining wall stably 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.
Figure 2 is a construction overview of a ground reinforced RC wall retaining wall type RC retaining wall is applied to the self-supporting formwork system of the ground reinforced RC wall according to the present invention.
3 is a detailed view of part 'A' in FIG. 2.
4 and 5 are a detailed view of the construction process and the truss beam of the retaining wall formwork applied in FIG. 2, respectively.
6 is a detailed view of one embodiment of a binding tool used in the present invention.
7 is a constructional cross-sectional view of the ground reinforced composite wall RC retaining wall completed according to the present invention.

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

Figure 2 is a construction overview of the ground reinforcement RC wall retaining wall reinforced RC retaining wall according to the present invention is applied to the independent formwork system, Figure 3 is a detailed view of the 'A' portion in FIG.

The self-supporting formwork system of the ground reinforced plywood type RC retaining wall according to the present invention is characterized in that the retaining wall formwork is installed freely without props in the construction of the plywood retaining wall with the RC retaining wall integrated on the slope S reinforced with the ground reinforcement 110. There is this. To this end, in the present invention, the retaining wall formwork is composed of a retaining wall formwork plate 210, a truss beam 220, and a vertical reinforcement 230, and at the same time, a connection between the ground reinforcement 110 and the retaining wall formwork is connected with a binding hole 300. .

In the present invention, the ground stiffener 110 is constructed to protrude from the ground while the rear end protrudes from the slope S, and according to the structure design, such as nails, earth anchors, rock bolts, etc. You can do it in number. 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 includes a retaining wall formwork plate 210, a truss beam 220, and a vertical reinforcement 230. That is, in the rear of the retaining wall formwork plate 210, the truss beam 220 is installed in parallel in the horizontal direction, and in the rear of the truss beam 220, the vertical reinforcement 230 is installed in parallel to support the horizontal reinforcement 220 installed in parallel in the vertical direction. Is installed. If the conventional retaining wall formwork is composed of a retaining wall formwork plate made of plywood and a horizontal reinforcement material and a vertical reinforcement material, the truss beam of a truss structure in which the inclined material 222 is installed between a pair of horizontal members 221 instead of the horizontal reinforcement material (220) is adopted. The adoption of the truss beam 220 can more effectively support the side pressure of the retaining wall concrete acting on the retaining wall formwork plate 210.

The binding hole 300 is installed long while connecting the rear end of the ground reinforcement 110 and the retaining wall formwork. The ground stiffener 110 is held to support the retaining wall formwork through the binding sphere 300. Since the ground reinforcement 110 is intrusively settled in the ground, the ground anchoring force of the ground reinforcement 110 is transferred to the retaining wall formwork through the binding hole 300 to support the retaining wall formwork. Since the retaining wall formwork is made of a retaining wall formwork plate 210, a truss beam 220, and a vertical reinforcement member 230, as shown in FIGS. 2 and 3, the binding hole 300 is connected to the rear end of the ground reinforcement 110 On the other hand, it penetrates the retaining wall formwork plate 210 and passes between the truss beams 220, and is connected to the vertical reinforcement member 230.

4 and 5 are a detailed view of the construction process and the truss beam of the retaining wall formwork applied in FIG. 2, respectively. 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. Can be constructed. The truss beam 220 is a member of a truss structure in which an inclined member 222 is installed between a pair of horizontal members 221, and the truss beam 220 is a thinner plate than the horizontal member 221 and the horizontal member 221 by each material. It is suitable if it is composed of a sloping material 222, and it is also possible to apply ready-made products such as GT24 products of PERI. The vertical reinforcing material 230 may use a variety of materials, such as angular materials and steel pipes, and preferably may be used in such a manner that a pair of c channels are arranged back to back among webs. The material specification and installation interval of the retaining wall formwork plate 210, the truss beam 220, and the vertical reinforcement 230 constituting the retaining wall formwork are appropriately determined according to the structural design.

6 is an embodiment of the binding tool 300 applied to the self-supporting formwork system of the present invention, the present invention proposes a form that can utilize the existing parts as much as a preferred embodiment. The fastener 300 includes a wedge-shaped insert nut 310, a cone nut 330, a coupler 320, a cone bolt 340, and a fixing nut 360, and further includes a shiatsu washer 350 Can be configured. The wedge-shaped insert nut 310 is composed of the assembly of the wedge 311 and the wedge grip 312, and is fastened to the rear end of the ground reinforcement 110 while the wedge 311 is fitted inside the wedge grip 312, A thread is formed on the outer circumferential surface of the wedge grip 312. The wedge-shaped insert nut 310 may be applied with a lock nut or the like, which is usually used as an anti-loosening nut. The cone 330 is installed in contact with the inner surface of the retaining wall formwork plate 210 with a cone-shaped nut, and can be applied to the corn used for form ties. The coupler 320 is provided with a cap nut portion 321 at the front end and a bolt portion 322 at the rear end, and the cap nut portion 321 is screwed to the wedge grip 312 of the wedge-shaped insert nut and the bolt portion ( 322) is fastened to the nut 330, thereby connecting the wedge-shaped insert nut 310 and the nut 330. The cone bolt 340 is installed to pass through the retaining wall formwork plate 210 and pass through the truss beams 220 arranged in parallel to the vertical reinforcement 230, the leading end being fastened to the cone 330 and the rear end being vertically reinforced. It is installed to reach 230. The fixing nut 360 is fastened to the cone bolt 340 so that the cone bolt 340 is fixed to the vertical stiffener 230, and a shiatsu washer 350 is further installed between the cone bolt 340 and the fixing nut 360. It can effectively acupressure the vertical reinforcement 230. When the vertical stiffener 230 is provided as a pair of c channels, and when a pair of c channels are installed so that the webs are back to each other, the cone bolt 340 passes between the pair of c channels and the shiatsu washer 350 simultaneously touches the pair of c channels. Is installed. As described above, the ground reinforcement 110 and the retaining wall formwork are connected via the binding hole 300, and thus the side pressure of the retaining wall concrete transmitted to the retaining wall formwork by pouring retaining wall concrete (WC) is supported by the self-reinforcing support of the retaining wall formwork. It is transferred to the ground reinforcement 110 by the binding sphere 300 and is supported.

7 is a constructional cross-sectional view of the ground reinforced composite wall RC retaining wall completed according to the present invention. The construction method of the ground reinforced composite wall RC retaining wall according to the present invention will be described with reference to FIGS. 2 and 7.

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, a retaining wall foundation F may be installed on the ground floor as necessary, and a foundation D may be formed with a bottom of the drainage plate 120 and a drainage layer connected to the ground. The retaining wall foundation F can be constructed with RC like the retaining wall, and the drainage layer can be formed by installing the perforated pipe 121.

Then, the retaining wall reinforcement (WR) is reinforced (second step). Retaining wall reinforcing bar (WR) can be reinforced by assembling the reinforcing bar as a grid, and the connector 400 may 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 400 consisting of a connecting acupressure plate 410 and a connecting bolt 420 is illustrated, and the connector 400 connects the connecting acupressure plate 410 to the slope acupressure plate 130 with a connecting bolt 420. It is the way. According to the installation of the connector 400, the retaining wall reinforcing bar WR can be fixed to the connection bolt 420 or the connection acupressure plate 410 to fix the reinforcement position easily. Since the connecting acupressure plate 410 is constrained to the ground stiffener 110, when the retaining wall concrete WC is cast and integrated, the entire RC retaining wall serves as a pressure plate that acupressures the slope S.

Next, the retaining wall formwork is installed while installing the binding hole 300 (the third step). Wedge-type insert nut 310, coupler 320, cone nut 330, cone bolt 340, shiatsu washer 350, fixing nut (360) consisting of a fixed nut (360), if installed, wedge-shaped insert Fastening the nut 310 to the ground reinforcement 110, fastening the coupler 320 to the wedge-shaped insert nut 310, fastening the nut 330 to the coupler 320, and the retaining wall formwork plate 210 In the state installed in contact with the cone 330, the corn bolt 340 is penetrated through the retaining wall formwork plate 210 and fastened to the cone 330, and the truss beam 220 and the vertical reinforcement 230 are installed. , After the shiatsu washer 350 is installed on the cone bolt 340, the fixing nut 360 is fastened and fixed while being in close contact with the vertical reinforcement 230.

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 while loosening the binding hole (300, fixing nut, shiatsu washer, and conbolt). 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
300: binding hole 310: wedge insert nut
320: connector 330: a nut
340: cone bolt 350: shiatsu washer
360: fixing nut
400: connector 410: connecting pressure plate
420: connecting bolt

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;
Consisting of, including, but;
The retaining wall formwork, the retaining wall formwork plate 210 spaced apart from the slope (S); As a member of the truss structure in which the inclined material 222 is installed between the pair of horizontal members 221, the truss beam 220 is 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 that is installed in parallel in the longitudinal direction to support the truss beam 220 installed in parallel behind the truss beam 220;
The binding hole 300 is fixed to the vertical reinforcement 230 by passing through the retaining wall formwork plate 210 and passing through the truss beams 220 arranged in parallel while being bound to the rear end of the ground reinforcement 110 A self-supporting formwork system for a ground reinforced RC wall retaining wall. In claim 1,
The binding hole 300,
A wedge-shaped insert nut 310 composed of a wedge 311 and a wedge grip 312 and fastened to a rear end of the ground reinforcement 110, wherein a thread is formed on an outer circumferential surface of the wedge grip 312;
The retaining wall formwork plate 210 is installed in contact with the inner surface 330;
A cap nut portion 321 at the front end and a bolt portion 322 at the rear end are provided, and the cap nut portion 321 is fastened to the wedge grip 312 of the wedge-shaped insert nut, and the bolt portion 322 is the nut. A coupler 320 fastened to the 330;
It passes through the retaining wall formwork plate 210 and passes through the truss beams 220 arranged in parallel to extend to the vertical stiffener 230, but the front end is fastened to the nut 330 and the rear end reaches the vertical stiffener 230 Cone bolt 340 is installed;
A fixing nut 360 fastened to the cone bolt 340 so that the cone bolt 340 is fixed to the vertical reinforcement 230;
A self-supporting formwork system of a ground reinforced RC wall retaining wall, characterized in that it comprises a. In claim 2,
The binding hole 300,
A self-supporting formwork system of a ground reinforcement siding wall type RC retaining wall, further comprising a pressure washer 350 installed to acupressure the vertical reinforcement 230 between the cone bolt 340 and the fixing nut 360. In claim 3,
The vertical stiffener 230 is provided with a pair of U-channels, and the webs are installed to be spaced apart from each other,
The binding hole 300, the ground bolt reinforcement wall type RC retaining wall, characterized in that the cone bolt 340 is installed to pass between a pair of c channels and the shiatsu washer 350 is installed to acupressure the pair of c channels simultaneously Freestanding formwork system. A method for constructing a ground reinforced RC wall retaining wall while applying a self-supporting formwork system of a ground reinforced RC wall retaining wall according to any one of claims 1 to 4,
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);
The third step of installing the retaining wall formwork while installing the binding sphere 300;
A fourth step of curing and pouring 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 hole 300;
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 a method of constructing a ground reinforced plywood type RC retaining wall, characterized in that the connector 400 for fixing the position of the reinforcement of the retaining wall reinforcing bar WR is connected to and installed on the slope pressure plate 130.

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