KR101789450B1 - Underground structures using overlapped pile wall and construction method thereof - Google Patents

Abstract

According to the present invention, there is provided a method of constructing an artificial stone pile, comprising the steps of: constructing an artificial pile for constructing a plurality of artificial piles, A male pile constructing step of constructing a plurality of male piles so as to overlap with the female piles on both sides between the plurality of female piles; And a structure constructing step of excavating the inside of the pile wall formed of the plurality of female piles and the plurality of male piles and constructing the structure so as to contact the pile wall, wherein the construction of the structure in the step of constructing the structure is top down And a bottom-up method. The present invention relates to an underground structure using an overlapped pile wall and a construction method thereof.
According to the present invention, there is provided a method of constructing an artificial pile, comprising the steps of: constructing a plurality of female piles so as to be spaced apart from each other by a predetermined distance; constructing a plurality of male piles to overlap with the female piles on both sides between the plurality of female piles; And a pile wall formed of a male pile, the pile wall formed by stacking the pile and the male pile is used as an earth retaining wall during the construction, and when the structure is completed, It is possible to provide an effect of increasing workability, safety, and economical efficiency by resisting earth pressure and underground water pressure.

Description

BACKGROUND OF THE INVENTION Field of the Invention [0001] The present invention relates to an underground structure using an overlapped pile wall,

This embodiment relates to a method of constructing an underground structure using an overlapped pile wall and an underground structure to be constructed thereby.

Underground structures should be able to safely support earth pressure, underground water pressure, etc., which are underground structures such as subways, underground roads, underground reservoirs and underground buildings.

A conventional technique for constructing such an underground structure is shown in Fig. In this prior art, an earth structure is first constructed after the earth retaining wall constructed by applying an additional or ground reinforcement grout to the back surface. That is, the H file 10 and the earth plate 11 are installed to construct the earth retaining wall, then the inside of the earth retaining wall is excavated, and the wale 12, the strut 13, the intermediate pile 14 To support the earth pressure and to construct the underground structure. The underground structure is constructed in the same manner as the method of constructing the structure on the ground. In general, the lower slab 21 is installed, the wall 22 is installed, and the upper slab 24 is installed .

However, in order to construct the earth retaining wall and the grout on the back of the earth retaining wall, the above-mentioned prior art should construct the ground structure considerably away from the boundary surface of the usable land. Therefore, the construction is complicated and difficult due to the restriction of the paper, the efficiency of the land is low, and the construction cost is increased.

Also, since a plurality of strut logs and intermediate files are installed in the work space inside the retaining wall, there is a lot of work restriction. Therefore, the work is inconvenient and difficult, the risk of safety accidents increases, and the quality of the underground structure may deteriorate accordingly.

In addition, the underground structures that have been completed will block the flow of groundwater. Especially, in case of long underground structures such as subways, or large underground structures, it interrupts the flow of underground water and acts like an underground dam. Therefore, excessive groundwater pressure acts on one side to cause leakage, and in case of earthquake load or the like, the safety of the underground structure is seriously threatened by the excessive unilateral groundwater pressure.

Patent 1: Korean Patent No. 10-1632840

According to an aspect of the present invention, there is provided a method of constructing a plurality of piles, the method comprising: constructing a plurality of piles so as to be spaced apart from each other by a predetermined distance; constructing a plurality of piles so as to overlap with the piles; And a step of constructing a structure such that the pile walls formed by the plurality of female piles and the male pile come into contact with the pile walls formed by overlapping the rock pile and the male pile, so that the pile wall is used as the earth retaining wall during the construction, It is intended to provide an underground structure using an overlapped pile wall having increased construction efficiency, safety, land efficiency, and economical efficiency so as to resist earth pressure and underground water pressure together with the structure during its use.

Also, by including the drainage hole construction step, the vertical drainage member construction step, and the horizontal drainage member construction step in the structure construction step, groundwater is inductively drained from one side of the structure to the other side by the drainage hole, the vertical drainage member, and the horizontal drainage member, The present invention provides an underground structure using an overlapped pile wall in which an excessive amount of groundwater is prevented from being stored at one side of the pile and a structure is safely protected when an earthquake occurs.

Also, the present invention provides an underground structure using an overlapped pile wall that prevents groundwater from flowing into the inside of a pile wall by installing the drainage hole above the groundwater, and a construction method thereof.

Also, the present invention provides an underground structure using an overlapped pile wall and a construction method thereof, by which impervious waterproofing material is applied to the bottom and side surfaces of the underground structure, thereby completely preventing the groundwater from being introduced into the underground structure.

A method of constructing an underground structure using an overlapped pile wall according to an exemplary embodiment of the present invention includes: an arm pile construction step of constructing a plurality of piles so as to be spaced apart from each other along an installation interface of an underground structure; A male pile constructing step of constructing a plurality of male piles so as to overlap with the female piles on both sides between the plurality of female piles; And a structure constructing step of excavating the inside of the pile wall formed of the plurality of female piles and the plurality of male piles and constructing the structure so as to contact the pile wall, wherein the construction of the structure in the step of constructing the structure is top down (Top-Down) method or a bottom-up method.

In addition, the constructing step may include a drainage hole construction step of constructing a plurality of drainage holes formed through the pile wall body, a vertical drainage member for installing a vertical drainage member installed vertically along the pile- And a horizontal drain member installation step of installing a horizontal drain member for interconnecting the vertical drain members on both sides of the structure, wherein the drainage member, the vertical drain member, the horizontal drain member, The groundwater is guided and drained to the other side to prevent excessive storage of groundwater at one side, and the structure is safely protected when an earthquake occurs.

In addition, the drainage hole construction step includes a groundwater inflow pipe installation step of installing a groundwater inflow pipe inserted into the drainage hole and protruding outwardly from the pile wall body. The groundwater inflow pipe has a sharp end, And the groundwater inflow port is formed as a long slot in the axial direction and is formed to be inclined downward.

Further, the horizontal drainage member may be installed below the lower slab of the structure.

The horizontal drainage member may include a concave C-shaped channel on the upper side and a gravel disposed on a concave inner side of the C-shaped channel.

Further, it may further comprise a rubber packing provided between the upper side of the flanges on both sides of the C-shaped channel and the lower side of the underground structure.

Further, the horizontal drainage member may be disposed above or below the intermediate slab or the upper slab of the structure.

Further, the drain hole is disposed above the groundwater around the structure.

Also, the step of constructing the structure may include a step of applying a waterproofing material to the lower part of the structure and the impermeable waterproofing material between the pile wall and the structure.

Also, in the step of constructing the rock pile, a curing retardant may be mixed with the rock pile.

Also, in the step of constructing the male pile, reinforcement or steel material may be installed on the male pile.

Also, an underground structure using an overlapped pile wall according to an exemplary embodiment of the present invention can be constructed by an underground structure construction method using an overlapped pile wall.

According to the present invention, there is provided a method of constructing an artificial pile, comprising the steps of: constructing a plurality of female piles so as to be spaced apart from each other by a predetermined distance; constructing a plurality of male piles to overlap with the female piles on both sides between the plurality of female piles; And a pile wall formed of a male pile, the pile wall formed by stacking the pile and the male pile is used as an earth retaining wall during the construction, and when the structure is completed, Earth pressure, and groundwater pressure, thereby providing an effect of improving workability, safety, land efficiency, and economical efficiency.

Also, by including the drainage hole construction step, the vertical drainage member construction step, and the horizontal drainage member construction step in the structure construction step, groundwater is inductively drained from one side of the structure to the other side by the drainage hole, the vertical drainage member, and the horizontal drainage member, It is possible to prevent the excessive storage of the groundwater at one side of the building, and to protect the structure safely when an earthquake occurs.

Further, by providing the drain hole above the groundwater, it is possible to provide an effect of preventing the groundwater from flowing into the inside of the pile wall during the construction.

In addition, by installing the impermeable waterproof material on the bottom and side surfaces of the underground structure, it is possible to completely prevent the groundwater from being introduced into the underground structure.

BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is a cross-sectional view showing a conventional method of constructing an underground structure. FIG.
2 to 4 are flowcharts illustrating a method of constructing an underground structure using an overlapped pile wall according to an example of the present invention.

Hereinafter, some embodiments of the present invention will be described in detail with reference to exemplary drawings. In the drawings, like reference numerals are used to refer to like elements throughout the drawings, even if they are shown in different drawings. In the following description of the embodiments of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the difference that the embodiments of the present invention are not conclusive.

In describing the components of the embodiment of the present invention, terms such as first, second, A, B, (a), and (b) may be used. These terms are intended to distinguish the constituent elements from other constituent elements, and the terms do not limit the nature, order or order of the constituent elements. When a component is described as being "connected", "coupled", or "connected" to another component, the component may be directly connected or connected to the other component, May be "connected "," coupled "or" connected ".

Hereinafter, an underground structure using an overlapped pile wall according to an exemplary embodiment of the present invention and a construction method thereof will be described in detail with reference to the drawings.

In the following description, the inner side, the inner side, and the like refer to the center direction of an underground structure (hereinafter, referred to as a 'structure'), and the outer side, the outer side, and the like refer to the opposite direction.

2 to 4, a method of constructing an underground structure using an overlapped pile wall according to an exemplary embodiment of the present invention includes a step of constructing an art pile 110, a step of constructing a male pile 120, An underground structure (hereinafter referred to as "structure") can be constructed. Underground structures are structures installed in the ground such as subways, underground roads, underground reservoirs, underground shopping malls, and underground buildings. In addition, the method of constructing the underground structure and the structure of the underground structure related thereto will be explained below.

Referring to FIG. 2, the step of constructing the rock piles 110 is a step of constructing a plurality of rock piles 110 so as to be spaced apart from each other along the installation interface of the underground structure. That is, a guide wall or the like is provided at an interface for installing an underground structure, and a plurality of cloth tools spaced apart at regular intervals are formed by perforating the ground along the guide wall, ). In addition, the rock pile 110 may be manufactured in advance so that concave portions are formed on both sides of the rock pile 110, and then the rock pile 110 may be inserted and installed in the field.

The plurality of female piles 110 may be spaced apart from each other by a distance smaller than the diameter of the male piles 120 so that the male piles 120, which will be described later, are overlapped with each other. In addition, the rock pile 110 may be made of a concrete having low compressive strength so that a portion of the rock pile 110 can be easily punched when forming a cloth tool for constructing the male pile 120. Also, the rock pile 110 can be easily mixed with the curing agent in concrete to facilitate the formation of the pile tools of the male pile 120.

In the case of the rock pile 110, one may be made of unfilled concrete, sometimes reinforcing bars at the center, or a steel material. However, it is preferable that only the concrete is formed at a portion overlapping with the male pile 120 described later.

3, in the step of constructing the male pile 120, a plurality of male piles 120 are installed so as to overlap with the female piles 110 on both sides between the plurality of female piles 110. As shown in FIG. That is, the ground is pierced together with a part of the female pile 110 between the plurality of female piles 110 to form a cloth tool, and concrete is filled in the cloth tool to construct the male pile 120. Through this step, a pile wall in which the rock pile 110 and the male pile 120 are superimposed is formed, so that the soil or groundwater outside the pile wall is prevented from flowing inward.

It is preferable that the overlapping widths of the female pile 110 and the male pile 120 are formed to be somewhat wider so as to overlap each other even if the installation deviation occurs over the length of the female pile 110 or the male pile 120. [ In addition, the male pile 120 may have sufficient design strength to securely support the earth pressure or ground water pressure of the pile wall after completion of construction. Therefore, a steel such as a reinforcing bar or an H beam can be installed on the concrete of the male pile 120.

The pile wall constructed through the steps described above is used as an earth retaining wall supporting the earth pressure during construction and can act as a structure resistant to earth pressure and ground water pressure in combination with the structure after the construction of the structure is completed.

The pile wall of the present invention can exhibit a sufficient supporting force because the pile wall is formed integrally with the male pile 120 even if the compression strength of the pile 110 is low. In addition, since the pile wall is formed of concrete, the pile wall is more rigid than the retaining wall formed by the H-file and the earth plate, and a plurality of struts and an intermediate pile are not required at the excavation portion inside the pile wall. Therefore, it is easy and easy to construct because there are few restrictions on the work, the risk of safety accidents is small, and thus the quality of the underground structure can be increased. In addition, since the rock pile 110 and the male pile 120 are piled up to form a pile wall, joints can not be formed, and the inflow of groundwater during construction and use can be effectively blocked. Therefore, it is possible to reduce not only the ground reinforcement but also the construction work, thereby reducing the construction cost and increasing the safety in construction.

With reference to FIG. 5, the structure construction step will be described first for convenience of explanation. The constructing step is a step of excavating the inside of the pile wall formed of the plurality of female piles 110 and the plurality of male piles 120 and constructing the structure. That is, the structure is constructed so as to excavate the inside of the pile wall installed at the interface between the underground structure and the exposed pile wall.

The structure can be constructed in a top-down or bottom-up manner.

The top-down method is a method of constructing the structure from the upper layer while excavating the ground to reduce the construction cost and air. That is, after the inside of the pile wall is excavated up to the position where the upper slab of the structure is to be installed, the upper slab is installed, and the excavated portion is filled up. Thereafter, the upper slab is used as a strut, and the intermediate slab is drilled to a position where the intermediate slab of the structure is to be installed on the lower side thereof. Then, the intermediate slab is installed and drilled to the position where the lower slab of the structure is to be installed, After that, the wall of the structure is installed by using the pile wall as a formwork. At this time, the upper excavation part of the upper slab may be backed up, but the ground structure may be continuously installed above the upper slab.

In addition, the bottom up method is a method of constructing a structure from a lower layer after completing excavation to a position where a lower slab is to be constructed, considering structural safety and convenience of construction. That is, after inserting the inside of the pile wall to the position where the lower slab of the structure is to be installed, the lower slab is installed, and the excavation part is filled back after the wall, the intermediate slab, and the upper slab of the structure are constructed. In this case, the upper excavation part of the upper slab may be backed up, but the ground structure may be continuously constructed on the upper side of the upper slab.

The underground structure of this embodiment can be composed of only the upper slab and the lower slab without the intermediate slab.

In the construction of the structure, an inner pillar, an inner wall, and the like may be further installed in the wall of the structure in consideration of the purpose, purpose, function, safety, and the like of the structure. Also, a wale band may be installed horizontally on the exposed pile wall so as to support the earth pressure while excavation proceeds, and a strut brace may be installed between the belt zones of the pile walls on both sides. The wrist strap and the strut are installed in a usual manner, and a detailed description thereof will be omitted.

Since the structure is constructed as an abutment wall so as not to be separated from the pile wall but to be in contact with the pile wall, the construction of the structure is easy, the use of the land is efficient, and the construction cost and air are saved. At this time, the wall of the structure may be integrally structured with the pile wall so as to integrally resist the vertical load such as the earth pressure and the ground water pressure or the vertical load such as the upper load, or to be structurally separated from the vertical load, And the load may be respectively resisted. When the pile wall and the wall of the structure are integrally constructed, the pile wall and the wall of the structure can be bound together by the reinforcing bars so as to behave as one body.

The step of constructing the structure may include a step of applying a waterproofing material to the lower part of the structure and the impermeable waterproofing material between the pile wall and the structure. Also, the waterproofing material can be installed on the top of the structure. That is, an impermeable waterproofing material is installed so as to surround the lower slab and the wall of the structure or to surround the lower slab, the wall and the upper slab, and the impermeable waterproofing material is continuously installed to completely prevent the groundwater from flowing into the inside of the structure .

Referring to FIG. 4, the structure construction step may further include a drainage 130 construction step, a vertical drainage member 140 construction step, and a horizontal drainage member 150 construction step. The step of constructing the drain 130, the step of installing the vertical drainage member 140, and the step of installing the horizontal drainage member 150 can be performed while digging the inside of the pile wall, or after the excavation is completed.

The step of constructing the drain hole 130 is a step of constructing a plurality of drain holes 130 formed through the pile wall. That is, a plurality of drains 130 are installed at regular intervals along both sides of the pile wall, and the number of the drains 130 is small when the size of the underground structure is large and small when the size of the underground structure is small. The drain hole 130 may be formed through the pile 110 or the male pile 120, but it is preferably formed on the pile 110 without any reinforcing bars. The position of the drain hole 130 is preferably slightly above the ground water around the structure to prevent the groundwater from flowing into the inside of the pile wall during the drain hole 130. However, it is undesirable to install the water pipe in an excessively high position, because the groundwater is excessively stored. Therefore, as the groundwater level becomes higher after completion of the construction of the structure, the groundwater can be introduced through the one drainage hole 130 and then discharged through the drainage hole 130 on the other side.

The step of constructing the drain hole 130 may include a step of installing a groundwater inlet pipe 132 in which a groundwater inlet pipe 132 is inserted into the drain hole 130 and protruded outside the pile wall.

The groundwater inflow pipe 132 is preferably sharpened at its ends to facilitate insertion into the ground outside the drain hole 130. Further, a groundwater inlet 134 may be formed in the lower half. The reason for forming the groundwater inflow opening 134 in the lower half is to prevent the inflow of the earth debris while allowing the groundwater to flow easily.

Further, the groundwater inlet 134 may be formed as a long hole in the axial direction, and may be inclined downward. In order to prevent the soil from entering the ground through the groundwater inflow opening 134 when the groundwater inflow pipe 132 is inserted into the ground, it is formed as a long slot in the axial direction. In addition, the downward inclination of the groundwater inflow port 134 is also intended to prevent the inflow of the earthworm and to introduce the groundwater. The outer diameter of the groundwater inflow pipe 132 is preferably closely adhered to the drain 130 of the pile wall.

In addition, by inserting sponge, nonwoven fabric, synthetic fiber, or the like into the groundwater inflow pipe 132, it is possible to prevent the inflow of the gravel into the groundwater inflow pipe 132, .

The step of constructing the vertical drainage member 140 is a step of constructing the vertical drainage member 140 installed vertically along the pile wall from the inside of each drainage hole 130. The vertical drain member 140 is connected to the drain 130 and typically extends downward, but may extend upward as needed.

The horizontal drainage member 150 construction step is a step of constructing a horizontal drainage member 150 interconnecting the vertical drainage members 140 on both sides of the structure. The horizontal drainage member 150 may be provided on the lower side of the lower slab of the structure, or on the upper or lower side of the middle slab or the upper slab of the structure, or they may be installed together.

The vertical drainage member 140 and the horizontal drainage member 150 may be formed of a general pipe, a pore pipe having a plurality of drain holes, or a net that is well permeable to ground water but does not penetrate foreign matter such as soil, Or a sponge or a nonwoven fabric is inserted into a pipe or a pipe, or the like may be used.

In addition, the horizontal drain member 150 installed below the lower slab may be formed of a gravel layer provided between the lower ground and the lower slab.

In particular, the horizontal drain member 150 installed on the lower side of the lower slab includes a concave C-shaped channel 152, a gravel 154 disposed inside the concave of the C-shaped channel 152, And a rubber packing 156 provided between the upper side of the flanges on the both sides and the lower side of the underground structure. By doing so, it is possible to safely secure the horizontal drainage passage, and therefore, the drainage water may not be disturbed from the ground pressure or the like. At the same time, the rubber packing 156 prevents the ground water from flowing into the inside of the C-shaped channel 152, so that the groundwater can be guided and drained from one side to the other.

By connecting the drain hole 130, the vertical drain member 140, and the horizontal drain member 150, the flow of groundwater may not be blocked. That is, the groundwater outside the one pile wall is guided and discharged to the outside of the other pile wall through the drainage port 130, the vertical drainage member 140, the horizontal drainage member 150, the vertical drainage member 140 and the drainage hole 130 . Therefore, it is possible to prevent excessive leakage of groundwater to one side of the structure to prevent water leakage during use of the structure, and to protect the structure by reducing the impact by an external force such as an earthquake.

Meanwhile, an underground structure using an overlapped pile wall according to an exemplary embodiment of the present invention can be constructed by a method of constructing an underground structure using the above-described overlapped pile wall.

The construction of an underground structure using an overlapped pile wall according to an exemplary embodiment of the present invention is described above.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments. That is, within the scope of the present invention, all the constituent elements may be constituted or operated selectively in combination with one or more. Furthermore, the terms "comprises", "comprising", or "having" described above mean that a component can be implanted unless otherwise specifically stated, But should be construed as including other elements. All terms, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used terms, such as predefined terms, should be interpreted to be consistent with the contextual meanings of the related art, and are not to be construed as ideal or overly formal, unless expressly defined to the contrary.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

110: Rock pile
120:
130: Drain
132: groundwater inflow pipe
134: groundwater inlet
140: Vertical drainage member
150: Horizontal drainage member
152: C-shaped channel
154: Gravel
156: Rubber packing

Claims (12)

A step of constructing an arm pile for constructing a plurality of rock piles so as to be spaced apart from each other at a predetermined interval along an installation interface of an underground structure;
A male pile constructing step of constructing a plurality of male piles so as to overlap with the female piles on both sides between the plurality of female piles;
And an underground structure constructing step of excavating the inside of the pile wall formed of the plurality of female piles and the plurality of male piles and constructing the underground structure so as to contact the pile wall,
The construction of the underground structure at the construction stage of the underground structure is a top-down method or a bottom-up method,
The method of claim 1,
A drainage hole construction step of constructing a plurality of drainage holes formed through the pile wall body,
A vertical drain member installation step of installing a vertical drain member installed vertically along the pile wall inside the drain hole, and
And a horizontal drain member installation step of installing a horizontal drain member that interconnects the vertical drain members on both sides of the underground structure,
The groundwater is guided and drained from one side of the underground structure to the other side by the drain hole, the vertical drain member, and the horizontal drain member to prevent excessive storage of groundwater at one side, and the underground structure is safely protected when an earthquake occurs ,
The horizontal drainage member is installed above or below an intermediate slab or an upper slab of the underground structure,
Wherein the step of constructing the drainage hole includes a step of installing a groundwater inflow pipe inserted into the drainage hole and provided with a groundwater inflow pipe protruding outside the pile wall,
The groundwater inflow pipe has a sharp edge at an end thereof, a groundwater inflow port at a lower half thereof,
Wherein the groundwater inflow port is formed as an elongated slot in the axial direction and formed to be inclined downwardly and the step of constructing the underground structure includes a step of constructing a waterproofing material for impermeable waterproof material between the lower part of the underground structure and the underground structure between the pile wall and the underground structure The method of claim 1,
A step of constructing an arm pile for constructing a plurality of rock piles so as to be spaced apart from each other at a predetermined interval along an installation interface of an underground structure;
A male pile constructing step of constructing a plurality of male piles so as to overlap with the female piles on both sides between the plurality of female piles;
And an underground structure constructing step of excavating the inside of the pile wall formed of the plurality of female piles and the plurality of male piles and constructing the underground structure so as to contact the pile wall,
The construction of the underground structure at the construction stage of the underground structure is a top-down method or a bottom-up method,
The method of claim 1,
A drainage hole construction step of constructing a plurality of drainage holes formed through the pile wall body,
A vertical drain member installation step of installing a vertical drain member installed vertically along the pile wall inside the drain hole, and
And a horizontal drain member installation step of installing a horizontal drain member that interconnects the vertical drain members on both sides of the underground structure,
The groundwater is guided and drained from one side of the underground structure to the other side by the drain hole, the vertical drain member, and the horizontal drain member to prevent excessive storage of groundwater at one side, and the underground structure is safely protected when an earthquake occurs ,
The horizontal drainage member is installed on the lower side of the lower slab of the underground structure,
The horizontal drainage member includes a concave C-shaped channel on the upper side, and a gravel disposed on a concave inner side of the C-shaped channel,
Wherein the step of constructing the drainage hole includes a step of installing a groundwater inflow pipe inserted into the drainage hole and provided with a groundwater inflow pipe protruding outside the pile wall,
The groundwater inflow pipe has a sharp edge at an end thereof, a groundwater inflow port at a lower half thereof,
Wherein the groundwater inflow port is formed as an elongated slot in the axial direction and formed to be inclined downwardly and the step of constructing the underground structure includes a step of constructing a waterproofing material for impermeable waterproof material between the lower part of the underground structure and the underground structure between the pile wall and the underground structure The method of claim 1,
delete delete delete The method of claim 2,
The method of claim 1, further comprising a rubber packing provided between the upper side of the flanges on both sides of the U-shaped channel and the lower side of the underground structure.
delete The method according to claim 1 or 2,
Wherein the drain hole is installed above the groundwater around the underground structure.
delete The method according to claim 1 or 2,
Wherein the step of constructing the rock pile is performed by mixing the rock pile with a curing retardant.
The method according to claim 1 or 2,
Wherein the step of constructing the male pile is provided with reinforcing bars or steel material on the male pile.
An underground structure using an overlapped pile wall constructed by an underground structure construction method using an overlapping pile wall according to any one of claims 1 and 2.

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