KR100397958B1 - The structure timbering of cut with separating wale and the construction method thereof - Google Patents

Abstract

The present invention relates to a retaining wall support structure and a construction method of the strip is installed separately.

The present invention includes a retaining wall (1), a strip (2), the connecting member (3), the support means (4), the retaining wall (1) is installed at a predetermined distance from the ground boundary line, the strip (2) is It is installed at a horizontal interval from the retaining wall (1), the connecting member (3) is installed by connecting between the retaining wall (1) and the strip (2), the support means (4) is the strip (2) It is connected to and installed. The supporting means 4 is installed using a brace or earth anchor.

The present invention can reduce the process of performing the dismantling of underground construction and the construction of underground structures in parallel to the earthen wall, improving the work efficiency and reducing the installation height of the wall reinforcement of the underground structures and the one-time concrete placement height. By minimizing unnecessary construction joints of the wall, it can contribute to the improvement of the quality of the structure that is constructed underground, and the cost of construction can be reduced by reducing the loss of input materials.

Description

{The structure timbering of cut with separating wale and the construction method}

The present invention relates to a retaining wall support structure and a construction method provided by separating the strip. More specifically, the present invention relates to a retaining wall support structure and construction method in which horizontally installed on the retaining wall to separate and install a strip supporting the retaining wall, and a connection material is installed therebetween.

When the excavation work is carried out to excavate the ground to build the foundation of the building in the basement, the earthquake construction is performed to stabilize the surrounding ground and to order the groundwater. In particular, due to factors such as securing the land area ratio of the limited land in the downtown area and rising land prices, it is common to construct adjacent to the land boundary line when digging work, and to deepen the underground excavation depth by using the narrow land efficiently. In case of construction adjacent to the land boundary line, it is required to install the retaining wall to protect the existing facilities or adjacent buildings. The construction method of the earthen wall is to install the thumb pile in the ground and excavate the ground and install the earth plate.The method of the steel plate pile with the pile pile installed in the ground by interlocking the joint part of the sheet pile and the soil cement column are made continuously. There is a method of placing concrete material by inserting reinforcement in it, or digging a wall hole in the ground, and placing concrete by inserting a steel frame. In addition, the support structure for the self-support of the retaining wall is a brace or earth anchor.

As an embodiment of the conventional support structure of the retaining wall and retaining wall, the support structure provided with the support on the retaining wall with the thumb pile and the earth plate is shown in FIGS. 1 and 2, and the supporting structure using the earth anchor is 3 is shown.

Conventionally, the earth wall structure supporting the earth wall and the brace is installed by installing the thumb pile 11 in the ground at a predetermined distance horizontally in the ground, and then excavating it downwards by a predetermined depth vertically divided into a plurality of stages. Insert the earth plate 12 between the thumb piles 11 to form an earth wall, and install the pedestal horizontally side by side by installing a pedestal for each stage, and then install a brace and install the brace 2 and the brace ( 4) the jack 6 was installed and hardened. The brace (4) acted as a compressive material for supporting the reaction force transmitted from the girdle by acting on the girdle of the earth wall behind the earth wall consisting of the thumb pile 11 and the earth plate (12). When the strip installation and brace installation are installed at each stage and the excavation work is completed to the final digging depth, the reinforcing bar is added for the foundation and wall construction of the underground structure, and the wall rebar is the lowest brace (third brace) (23) and the installed band After installing to the height of the wall concrete corresponding to the height of the installed reinforcement and after curing period, disassemble the third brace 23 and the belt (2), the second brace installed in the next stage of the upper position (22) Reinforcement was continuously installed to the location, concrete was poured, and after the curing period, the second brace 22 and the belt were dismantled. By repeating the reinforcing rod installation, concrete placing and curing process, dismantled braces and bands were completed to complete the walls of the underground structure. In addition, the support structure of the retaining wall with earth anchors was completed by carrying out the excavation and dismantling in the same way as the support structure using the brace, followed by the dismantling and construction work of the hypothesis.

Conventional construction methods have problems in terms of quality, safety and economy.

In terms of quality, the casters and braces installed at predetermined intervals from the ground surface to the ground vertically are divided at least twice according to the vertical intervals of the belts. As construction joints increased and rebar joints occurred a lot, it was difficult to secure the quality of the structure.

In terms of safety, structurally weak problems occurred during construction.

In terms of economy, the construction was carried out by repeating the installation and dismantling of the same work, such as reinforcing and installing the reinforcement of the wall and dismantling the supporting brace after the concrete was laid. As the wall of the underground structure is divided into several times according to the installation interval of the band, the construction frequency increases and the air is delayed, and the material loss including the rebar due to the labor cost and the reinforcing bars is the main cause of the rise of the city park. .

The present inventors have developed a mud wall support structure and its construction method by separating the bands in order to solve the problems of the conventional mud wall support structure and construction method.

The object of the present invention is to construct a high quality underground structure that minimizes the construction joint of the wall by increasing the installation height of the wall reinforcement and the one-time concrete placing height of the underground structure, reducing the labor cost by reducing the work to repeat the installation and dismantling It is to provide an earthquake wall support structure and construction method by separating economical bands by shortening.

1 is a plan view showing an embodiment of a conventional prop retaining wall support structure.

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

3 is a plan view showing an embodiment of a conventional earth anchoring retaining wall support structure.

4 is a perspective view showing a brace support structure provided by separating the strips at a certain interval in the horizontal direction in the retaining wall according to the present invention. FIG. 5 is a plan view of FIG.

6 is a cross-sectional view taken along line B-B in FIG.

7 is a cross-sectional view showing the earth anchor type retaining wall support structure installed by separating the strips at a predetermined interval in the horizontal direction from the retaining wall.

<Description of Major Codes in Drawings>

1: retaining wall 2: strip

3: connecting material 4: supporting means

5: underground structure wall 6: jack

7: Construction joint 11: Thumb pile

12: earth plate 15: binding cone

16: liner 17: pressure plate

18: pedestal 19: gilt support

21: the first stage bracing 22: the second stage bracing

23: 3rd stage brace

The retaining wall support structure of the present invention is composed of the retaining wall 1, the strip 2, the connecting member 3 and the supporting means (4).

The retaining wall (1) is installed at a predetermined distance from the earth boundary line, and is a wall subjected to external force such as earth pressure and hydraulic pressure, and includes sheet pile, thumb pile and earth plate, cast-in-place concrete wall, and soil nailing depending on the material used. As an example of the retaining wall 1, the retaining wall using the thumb pile 11 and the earth plate 12 is shown in FIGS. 4 to 6. Thumb pile 11 is mainly installed in the ground using the H-pile and excavated by a predetermined depth from the ground surface and then installed by inserting the earth plate 12 between the thumb pile 11 and the thumb pile (11). When the excavation work and the installation of the earth plate 12 is repeated and the excavation is completed to the final excavation depth of the basement layer, the retaining wall 1 is completed.

The strip 2 is installed in a plurality of stages at predetermined heights in the retaining wall 1 and is installed in parallel positions spaced apart by a predetermined interval horizontally. In general, H-shaped steel is used and the earth pressure acting from the rear surface of the retaining wall 1 is transmitted to the supporting means 4 described later.

The connecting member 3 is a member that connects the earthen wall 1 and the strip 2 horizontally at a predetermined interval and is installed by processing H-shaped steel or by manufacturing and processing a member such as a steel box shape. When the horizontal distance between the retaining wall (1) and the strip (2) is long, it is installed by extending processing as necessary.

Supporting means (4) is fixed to the strip (1) to resist the earth pressure acting on the back of the retaining wall and supports the retaining wall with a brace or earth anchor. Support means using braces generally vary depending on ground conditions, wall structure, etc., but the vertical spacing of the braces is generally 2.5 ~ 4m, the horizontal spacing is 3 ~ 5m, and the installation position of the brace of the first stage is 1 ~ 2m from the ground surface. It is preferable to set it within. H-beams and reinforced concrete are generally used as the support material. In addition, the support means using the earth anchor is a means for placing anchors in the ground and supporting the retaining wall by frictional resistance between the anchor body and the soil or rock. In this difficult or uneconomical case, the construction method using the brace is used to install the thumb pile around the ground boundary line. Hereinafter, the effect of the retaining wall support structure according to the present invention having the above configuration will be described. As shown in Fig. 6, according to the support wall structure of the present invention, the band 2 is spaced apart from the retaining wall 1 by a predetermined distance (more than the thickness of the underground structure wall 5) by the installation of the connecting member 3. And installed in this space, the underground structure wall (5) is formed by the pouring of concrete. Therefore, according to the present invention, unlike the conventional support structure, the belt and braces are installed outside the site where the underground structure wall 5 is to be formed, so it is possible to undertake wall formwork and concrete pouring without dismantling the belt and braces. It becomes possible. That is, according to the present invention, unlike the conventional method of forming the underground structure wall by repeating the dismantling of the belt and the casting of the concrete, it is possible to proceed with the wall laying regardless of the dismantling of the belt, so that the casting of the underground structure is done once By increasing the height to minimize the construction joint, it is possible to achieve the technical object of the present invention to provide a retaining wall support structure that can reduce labor costs and shorten the air due to repeated installation and dismantling.

Next, the construction method of the earth retaining support according to the support means of the present invention will be described with reference to Figs.

The construction method of the retaining wall support structure using the brace is to install the thumb pile 11 in the ground with a predetermined distance around the earth boundary line, excavate down the ground direction by a predetermined depth, and then install the earth plate between the thumb piles 11 installed. 12) and insert the retaining wall (1). One side of the said connection material 3 is joined to the said retaining wall 1 to the installed retaining wall 1. The belt length (2) is fixed to the other end of the connecting member (3) and installed, the band length (2) and the brace (4) is installed by connecting, repeating the excavation and installation process to the final excavation depth Complete the destroy operation.

In the construction method of the earth wall support structure using earth anchor, the thumb pile 11 is placed around the ground boundary line at a predetermined interval and installed in the ground, then excavated in the underground direction by a predetermined depth, and the earth plate between the installed thumb piles 11. After inserting (12), install the retaining wall (1). One of the connecting members 2 is joined to the retaining wall 1 to the installed retaining wall 1. The belt length 2 is fixed and installed at the other end of the connecting member 3, the pedestal 18 is coupled to the belt length 2, and installed through the earth anchor, and repeating the above steps to final drilling Complete the excavation to the depth.

When using the earth retaining support structure and the construction method of the present inventors to separate the strips and the construction method, the air is reduced by reducing the work of repeating the installation and dismantling during the construction of the underground structure, the construction cost is reduced because the manpower and materials can be reduced It works.

Claims (4)

A retaining wall (1) provided at predetermined intervals around the site boundary; A belt strip (2) installed at a predetermined interval in a horizontal direction from the retaining wall (1); It is formed in the underground structure wall (5) to be placed and cured between the retaining wall (1) and the strip (2), the connecting member (3) connecting between the retaining wall (1) and the strip (2); and , Support means (4) installed in connection with the belt (2); It includes, the earth wall structure support wall is separated and installed, characterized in that the underground structure wall is formed without disassembly of the belt and support means. The support wall structure of claim 1, wherein the support means (4) is installed by separating the bands, characterized in that the support or earth anchors are installed. (a) installing the retaining wall 1; (b) joining one side of said connecting member (3) to said retaining wall (1); (c) fix the belt piece (2) of claim 1 to an end of said connecting member (3); (d) connecting and installing the brace 2 and the brace of claim 2; Repeating the steps of (b) to (d) above the step of digging up to the final depth of the excavation depth, the construction method of the earthwall wall support structure installed by separating the bands. (a) installing the retaining wall 1; (b) joining one side of said connecting member (3) to said retaining wall (1); (c) fix the belt piece (2) of claim 1 to an end of said connecting member (3); (d) coupling pedestals 18 to the strip 2; (e) passing through the earth anchor of claim 2 and installed therein; Repeating the steps of (b) to (e) to break up to the final excavation depth, the construction method of the earth wall support structure separated by installing the strips, characterized in that it comprises.