KR20100002547A

KR20100002547A - The underground infrastructure construction work method for the bending moment reduction usingthe same, and infrastructure

Info

Publication number: KR20100002547A
Application number: KR1020080062476A
Authority: KR
Inventors: 구자갑
Original assignee: 주식회사 코아이엔씨
Priority date: 2008-06-30
Filing date: 2008-06-30
Publication date: 2010-01-07

Abstract

The present invention relates to a method for constructing underground structures and structures constructed thereby, in particular by increasing the efficiency of construction and construction of soil by sloped or curved floor slabs of reinforced concrete structures installed underground. The present invention relates to a method of constructing an underground structure and a structure constructed thereby, which reduce and reduce slab materials and reduce bending moments. The structure is constructed by using H-pile and earth plate method, heating method, or diaphragm wall method to construct a wall, which is a fixture, along the excavation interface, and to maintain the angle of repose as planned based on the wall and reinforcement structure. In the underground structure construction method consisting of a step of forming an excavation portion by excavating, a step of forming a reinforcing structure to stabilize the wall, a step of forming an underground structure of reinforced concrete in the excavation portion, and a step of finishing , When forming the underground structure, the floor slab of the structure is characterized in that formed in a structure in which the bending moment is reduced.

Description

The underground infrastructure construction work method for the bending moment reduction using the same, and infrastructure}

The present invention relates to a method for constructing underground structures and structures constructed thereby, in particular by increasing the efficiency of construction and construction of soil by sloped or curved floor slabs of reinforced concrete structures installed underground. The present invention relates to a method of constructing an underground structure and a structure constructed thereby, which can reduce the amount of slab material and reduce the bending moment and reduce the entry of temporary facilities.

Recently, with the development of redevelopment and reconstruction of downtown areas, the excavation construction site with a large depth is increasing.

In particular, in urban areas, excavation work is often performed near adjacent land boundaries in order to increase land utilization.

For example, when looking at the construction method of the subway station, which is one of the underground structures generally constructed in Korea, as shown in FIGS. 1A to 1D, a heat-treating method or a diaphragm for digging along the excavation interface on the ground 110 is shown. The wall 120, which is a temporary facility, is constructed by a fram wall construction method.

The excavation portion 111 is formed by digging the center to a flat bottom 111a with an excavator or the like while maintaining the angle of repose as the reference section of the wall 120.

The wall 120 is formed to form a reinforcing structure 130 made of a strip or anchor so as to stabilize.

The station structure 140 is formed of reinforced concrete on the bottom 111a of the excavation 111, and finishes.

However, in the conventional underground structure construction method, since the cross section of the bottom slab 141 of the station structure 140 constructed underground is formed into a quadrangle, the bending moment is increased and the tensile stress is increased by the tensile stress. There was a problem that the cross section of the bottom slab 141 is larger.

In addition, there is a problem that the excavation amount is unnecessarily increased to the lower space of the bottom slab 141 in a square, and the waste material such as reinforced concrete for constructing the bottom slab 141 is wasted more.

Therefore, in the case of the conventional underground structure construction method of forming a square cross section of the floor slab 141 has a disadvantage that the material consumption is enormous and requires a lot of construction costs, because the construction period is also long, the construction efficiency and economic efficiency is low There is a problem.

Thus, the present invention was created to solve the above problems, an object of the present invention is to be formed to be inclined or curved in the bottom slab of the structure installed underground, the amount of excavation of the soil and slab material is reduced, It is to provide an underground structure construction method for reducing the bending moment to reduce the bending moment, and thereby a structure constructed.

In order to achieve the above object, the present invention constructs a wall along the excavation boundary using a temporary construction method, and excavates the center by excavating the center while maintaining an angle of repose as long as the cross-section planned based on the wall and the reinforcing structure. And a step of forming a reinforcing structure to stabilize the wall, a step of forming an underground structure with reinforced concrete in the excavation part, and a finishing process. , The floor slab of the structure is characterized in that to form a structure in which the bending moment is reduced.

Optionally, the structure in which the bottom slab bending moment of the structure is reduced is characterized in that it is either inclined or made of a curved surface.

In addition, the present invention provides a structure constructed by the underground structure construction method for reducing the bending moment described above.

As described above, the present invention may achieve an excellent effect of preventing deformation by reducing the bending moment acting on the floor slab by forming the floor slab of the underground structure to be inclined or curved.

In addition, while reducing the amount of excavation of soil for the construction of underground structures, there is an effect that can reduce the material when building the floor slab of the structure.

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

Here, the components having the same function in all the following drawings are omitted by repeated reference to the same reference numerals, and the following terms are defined in consideration of functions in the present invention, which is a unique commonly used meaning It should be interpreted as.

2a to 2d is a diagram schematically illustrating a method for constructing an underground structure for reducing a bending moment according to an embodiment of the present invention. First, as shown in FIG. The diaphragm wall method is used to build a wall 220 that is a temporary fixture along the excavation interface.

Next, the excavation part 211 is formed using an excavator or the like as long as the end face is planned in the wall 220.

Here, the excavation of the excavation part 211 is formed to form an inclined or curved surface to the bottom edge portion 211b.

At this time, since only the bottom center portion 211a of the excavation portion 211 is excavated deeper than the edge portion 211b, the excavation amount of the soil is reduced.

Next, the reinforcing structure 230 is formed using a belt or an anchor to stabilize the wall 220.

Here, the reinforcing structure 230 serves as a transverse steel that transmits the force (moment or shear force) of the wall 220 to the axial force (AXIAL FORCE) as one of the members during the force transmission process.

Next, the bottom slab 241 is formed of reinforced concrete in the excavation portion 211, and subsequently, the underground structure 240 is constructed by constructing the first basement slab 242 and the second basement slab 243, etc. as necessary. To complete.

In this case, the bending moment of the bottom slab 241 of the underground structure 240 is reduced as the bottom edge portion 211b of the excavating portion 211 forming the underground structure 240 is formed to be inclined or curved. It can be easily constructed to form an inclined or curved surface which is a structure.

Subsequently, after completion of the underground structure 240, the outer wall is constructed, and other finishes are arranged to complete the entire underground structure.

On the other hand, the underground structure construction method may be a bottom-up construction (bottom-up) or a top-down construction (top-down) construction from the top to the bottom.

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various changes, modifications, and equivalent changes to other embodiments may be made without departing from the technical spirit of the present invention. It will be apparent to those skilled in the art to which the invention pertains.

1A to 1D are cross-sectional views schematically illustrating a conventional underground structure construction method.

2A to 2D are cross-sectional views schematically illustrating a method for constructing an underground structure having a structure in which a bending moment is reduced according to the present invention.

※ Explanation of code about main part of drawing ※

210: ground 211: drilling portion

211a: bottom center portion 211b: edge portion

220: wall 230: reinforcement structure

240: structure 241: floor slab

242: 1st floor slab 243: 2nd floor slab

Claims

Constructing a wall which is a temporary fixture along an excavation boundary by a temporary construction method, excavating a center by a predetermined section based on the wall and the reinforcing structure, and forming an excavation section; forming a reinforcing structure to stabilize the wall; and In the underground structure construction method consisting of the step of forming the structure of reinforced concrete in the excavation portion and the step of finishing the finishing process,

When the structure is formed of the reinforced concrete, the floor slab of the structure underground structure construction method for reducing the bending moment, characterized in that to form a structure in which the bending moment is reduced.

The method of claim 1, wherein the bottom slab bending moment of the structure is reduced structure of the underground structure for reducing the bending moment, characterized in that any one of the inclined or made of a curved surface.

The structure characterized in that constructed by the underground structure construction method for reducing the bending moment of any one of claims 1 and 2.