KR-102961576-B1 - Structure for supporting earth retaining walls in Top-down drilling method and construction method thereof

KR102961576B1KR 102961576 B1KR102961576 B1KR 102961576B1KR-102961576-B1

Abstract

The present invention relates to a structure for supporting an earth retaining wall used in a reverse construction method, wherein a plurality of piles and a king pile, in which an H-shaped steel is inserted into the internal space of the piles, are arranged longitudinally, comprising: a support module provided in the space between the piles and the king piles and a slab to support the earth retaining wall from external forces; a lath module provided in the space between the support module and the piles and the king piles; and a bracing member formed by casting on the upper side of the lath module. The support module comprises a first pillar provided between the king piles and the slab and an angle disposed between the first pillar and the adjacent first pillar. The angle comprises a connecting surface formed extending longitudinally with a certain height to connect the first pillar and the adjacent first pillar, and a seating surface formed extending a predetermined length toward the plurality of piles. At least a portion of the outer surface of the piles is supported in close contact with the bracing member to enhance supporting capacity. It is about a structure for support.

Inventors

김경중
오상원

Assignees

주식회사 다산구조기술

Dates

Publication Date: 20260507
Application Date: 20250916

Claims (5)

In a structure for supporting an earth retaining wall used in a reverse construction method, comprising a plurality of piles and king piles in which H-shaped steel is inserted into the internal space of the piles arranged in the longitudinal direction, A support module provided in the space between the above-mentioned pile and the above-mentioned king pile and the slab, which supports the above-mentioned earth retaining wall from external forces; A lath module provided in the space between the support module, the pile, and the thumb pile; and A support member formed by casting on the upper side of the above lath module; Includes, The above support module is, A first filler provided between the above-mentioned thumb pile and the slab; An angle disposed between the first pillar and the adjacent first pillar; Includes more, The above angle is, A connecting surface having a certain height and extending in the longitudinal direction to connect the first pillar and the adjacent first pillar; A seating surface formed to extend a predetermined length toward the plurality of files above; Includes, At least a portion of the outer surface of the above file is supported in close contact with the above support, Structure for supporting earth retaining walls used in reverse construction methods.
In paragraph 1, The above-mentioned lass module is A lath body, at least a portion of which is located on the upper part of the above-mentioned seating surface and is equipped with a wire mesh; On one side of the above lath body, a pile contact surface and a pile contact surface are respectively formed corresponding to the pile and the king pile, and The above file contact surface is, It is formed concavely with a curvature corresponding to the outer edge of the above file, and The pile contact surface above is, It is formed to be in close contact with the above H-shaped steel and the above first pillar, and Among the above lath bodies, the area located above the seating surface is characterized by being wider than the area located away from the upper part of the seating surface. Structure for supporting earth retaining walls used in reverse construction method
In paragraph 2, The above angle is, At least one filler groove formed in the longitudinal direction at a predetermined depth on the above-mentioned connecting surface; Includes more, The above support module is, A second pillar connecting the above connecting surface and the above slab; Includes more, The above second pillar is, A locking part that is fitted and coupled into the above filler groove and has an area wider than the width of the above filler groove; Includes, The second pillar and the centrifugal column of the file are located on a virtual line. Structure for supporting earth retaining walls used in reverse construction method
In a construction method for a structure supporting an earth retaining wall used in the reverse construction method, A pile installation step of forming a bore hole using excavation equipment and installing multiple piles and sheet piles inside the bore hole; A support module installation step of installing a support module including an angle, a first pillar, and a second pillar in the space between one of the plurality of files and a previously installed slab; A lath module mounting step of installing a lath module in the space between the above file and the above support module; A finishing step of pouring concrete into the space between the plurality of piles and the angle of the support module; Includes, The above support module installation step is, A first pillar fixing step of welding and joining the above thumb pile and the first pillar of the above support module; Construction method of a structure for supporting an earth retaining wall used in a reverse construction method including
In paragraph 4, The method further includes an angle welding step of welding and joining the angle in the space between the first pillar and an adjacent first pillar; The above angle welding step precedes the above pile installation step, and The above support module installation step is, A second filler fixing step in which one side is fixed to the slab and the other side is fitted into and coupled to a filler groove formed in the angle; Includes more, The above lath module mounting step is, A construction method for a structure supporting an earth retaining wall used in a reverse construction method, characterized by placing the lath module on the angle of the support module by its own weight in the space between the first pillar, the plurality of piles, and the king piles without a separate fixing step.

Description

Structure for supporting earth retaining walls in Top-down drilling method and construction method thereof The present invention relates to a structure for supporting a retaining wall in a reverse construction method and a method of constructing the same, and more specifically, to a structure for supporting a retaining wall in a reverse construction method and a method of constructing the same by minimizing the empty space that occurs between the pile and the slab. Conventionally, the method of constructing a building's basement structure, which involves excavating to a desired depth through blasting and excavation and then securing space by working upwards from the lowest floor, is called the "sunta" method. Conversely, it can be classified into the "yeokta" method, which involves excavating one floor down from the ground level and then constructing the underground structure in parallel to secure underground space. Among these, the reverse construction method, also known as the Top-Down method, specifically refers to a technique where excavation and structural work are carried out in reverse order, layer by layer, after the retaining wall has been constructed. The reverse construction method allows for shortened construction time by simultaneous excavation and above-ground work, ensures structural stability by utilizing permanent structures as supports for the retaining wall, and is currently being applied favorably in urban construction due to its low noise and vibration. In the reverse construction method for retaining walls, a widely used technique involves constructing a continuous row retaining wall using H-beams, sheet piles, CIP (Cast in-Place Pile), or SCW (Soil Cement Wall), and then excavating the inner side of the retaining wall to build the structure. Figure 1 illustrates a conventional method for constructing a CIP retaining wall. Referring to Figure 1, multiple hollow piles are extended in the longitudinal direction and then supported by a slab to secure an internal space. However, in the conventional method of constructing a CIP retaining wall, a separate temporary support had to be placed to provide support between the standard CIP pile and the slab, rather than a pile with an internal H-shaped steel section. In other words, because there was an empty space (A) between the pile and the slab, there was a problem in that the bearing capacity could not be properly transmitted. To solve this, the conventional technology of Fig. 1 places pillars to provide support between each pile and the slab. However, since the outer surface of the standard CIP pile forms part of the circumference, the problem of the bearing capacity not being properly transmitted still existed. FIG. 1 is a plan view of a structure for supporting a retaining wall used in a reverse construction method according to the prior art. FIG. 2 is a plan view of a structure for supporting a retaining wall used in the reverse construction method according to an embodiment of the present invention before casting. FIG. 3 is a plan view after casting of a structure for supporting a retaining wall used in the reverse casting method according to an embodiment of the present invention. FIG. 4 is an enlarged perspective view of a support module and a lath module among the structures for supporting a retaining wall used in the reverse construction method according to an embodiment of the present invention. FIG. 5 is an exploded perspective view of an angle and a lath module among the structures for supporting a retaining wall used in the reverse construction method according to an embodiment of the present invention. FIG. 6 is a flowchart of the construction method for a structure supporting an earth retaining wall used in the reverse construction method of the present invention. FIG. 7 is a detailed flowchart of the support module installation step in the construction method of a structure for supporting a retaining wall used in the reverse construction method of the present invention. In the following, embodiments are described in detail with reference to the attached drawings. However, various modifications may be made to the embodiments, and thus the scope of the patent application is not limited or restricted by these embodiments. It should be understood that all modifications, equivalents, and substitutions to the embodiments are included within the scope of the rights. Specific structural or functional descriptions of the embodiments are disclosed merely for illustrative purposes and may be modified and implemented in various forms. Accordingly, the embodiments are not limited to specific disclosed forms, and the scope of this specification includes modifications, equivalents, or substitutions that fall within the technical concept. Terms such as "first" or "second" may be used to describe various components, but these terms should be interpreted solely for the purpose of distinguishing one component from another. For example, the first