KR102580200B1 - Retaining structure and method for construction therefor - Google Patents

Abstract

The present invention includes a plurality of first CIPs 10 arranged in a vertical direction; at least one second CIP (20) disposed between the first CIPs (10); A first bracket (100) coupled to the outer peripheral surface of the first CIP (10); A second bracket (200) coupled to the outer peripheral surface of the second CIP (20); It provides an earth retaining structure including a wale 300 mounted on at least one of the first bracket 100 or the second bracket 200 and disposed in the transverse direction.
In the present invention, since the first bracket and the second bracket for installing the wale on the wall are connected to the CIP by fastening them with anchors, the cross-sectional loss of the first CIP and the second CIP can be minimized and the construction time on site can be shortened. There are advantages to this.

Description

Retaining structure and method for construction therefor}

The present invention relates to an earth retaining structure and its construction method.

Earth retaining structures are temporary structures in which earth retaining walls and support holes are installed to prevent the ground from collapsing during the construction of underground structures for architectural and civil engineering structures.

Among them, earth retaining walls are classified into several methods depending on the type, but the CIP method, which is the most commonly used column method at depths of 10 m or more, uses drilling equipment to drill to a certain depth and then inserts H-PILE or rebar net to create concrete. It is a method of pouring.

In the CIP method according to the prior art, concrete is poured after cross-inserting reinforcing bar nets and H-PILE during construction. Due to economic efficiency, CIP construction is performed only up to about 1m on the rock surface, and the H-PILE/earth plate or shotcrete method is used for the rock section. It is common to apply In order to install a wale, which is one of the supporting materials in the CIP wall section, the concrete cross-section of the bulb where the H-PILE is inserted is cut and a bracket for mounting the wale is installed on the exposed H-PILE cross-section, and a separate bracket is installed to fill the gap between the CIP and the wale. Install groove infill blocks.

As such, the above-mentioned prior art has problems of reduced economic efficiency, constructability, and structural safety.

Republic of Korea Patent No. 10-1781264 Republic of Korea Patent No. 10-0978468 Republic of Korea Patent No. 10-2320663 Republic of Korea Patent No. 10-1922534 Republic of Korea Patent No. 10-1915632 Republic of Korea Patent No. 10-1463427

The present invention was developed to solve the above-described conventional problems, and prevents unnecessary cross-sectional loss of the wall when installing strips of CIP walls, and provides a connection structure that secures economic efficiency, constructability, and safety through a more stable groove filling method, and the resulting construction. The purpose is to provide a method.

The present invention includes a plurality of first CIPs 10 arranged in a vertical direction; at least one second CIP (20) disposed between the first CIPs (10); A first bracket (100) coupled to the outer peripheral surface of the first CIP (10); A second bracket (200) coupled to the outer peripheral surface of the second CIP (20); It provides an earth retaining structure including a wale 300 mounted on at least one of the first bracket 100 or the second bracket 200 and disposed in the transverse direction.

The first CIP (10) includes a first CIP (11) arranged in a vertical direction; It includes a second CIP (12) disposed in a vertical direction and in close contact with one side of the first CIP (11), wherein the second CIP (20) is arranged in a vertical direction and the second CIP (12) ) A first H-PILE (21) in close contact with one side of the; It includes a second H-PILE (22) disposed in a vertical direction and in close contact with the other side of the first CIP (11), wherein the first bracket (100) is disposed on the first CIP (11). 1-1 bracket (101); and a 1-2 bracket 102 disposed on the second CIP 12, wherein the second bracket 200 includes a 2-1 bracket disposed on the first H-PILE 21 ( 201); It may include a 2-2 bracket 202 disposed on the second H-PILE 22.

Each of the 1-1 bracket 101 and the 1-2 bracket 102 includes a first bracket body 110 disposed to surround the outer peripheral surface 10a of a cylindrical pile; It may include a first spacing member 120 that protrudes outward in the radial direction from the outer peripheral surface of the first bracket body 110 and is coupled to the wale 300.

Each of the 2-1 bracket 201 and the 2-2 bracket 202 includes a second bracket body 210 disposed to surround the outer peripheral surface 20a of the cylindrical pile; a second spacing member 220 that protrudes radially outward from the outer peripheral surface of the second bracket body 210 and is coupled to the wale 300; It may include a beam supporter 250 that is coupled to the second bracket body 210, protrudes outward in the radial direction, and supports the lower end of the wale 300.

The present invention includes a plurality of first CIPs 10 arranged in a vertical direction; at least one second CIP (20) disposed between the first CIPs (10); A first bracket (100) coupled to the outer peripheral surface of the first CIP (10); A second bracket (200) coupled to the outer peripheral surface of the second CIP (20); In the earth retaining structure including a wale 300 mounted on at least one of the first bracket 100 or the second bracket 200 and disposed in the transverse direction, the first CIP 10 and the second A drilling step (S10) of forming a hole in the ground for construction of the CIP (20); Steps of constructing the first CIP (10) and the second CIP (20) in the drilled hole (S21) (22); A step of securing construction space by excavating the ground after steps S21 and S22 (S30); After step S30, a step (S41) of installing the first bracket 100 on the first CIP 10 and installing the second bracket 200 on the second CIP 20 in the construction space (S41) S42); After steps S41 and S42, a step (S50) of attaching the wale 300 to the beam supporter 250 of the second bracket 200; After step S50, the filling member 150 is placed in the first filling space 127 of the first bracket 100, and the filling member 150 is placed in the second filling space 227 of the second bracket 200. ) It provides a construction method of an earth retaining structure including a step of arranging (S60) and a step of fixing the wale 300 and the beam supporter 250 (S80).

First, the present invention has the advantage of improving constructability because the first and second brackets for connecting wall wales are fastened with anchors without cutting the CIP wall surface.

Second, since the present invention does not necessarily require the use of H-PILE inside the CIP to connect the wall wale, it has the advantage of securing economic feasibility by using only the reinforcing bar network when the ground condition consists of only a soil layer up to the bottom of the root entrance.

Figure 1 is a perspective view of an earth retaining structure according to a first embodiment of the present invention.
Figure 2 is a partially exploded perspective view of Figure 1.
Figure 3 is a perspective view of the first bracket shown in Figure 2.
Figure 4 is a perspective view of the second bracket shown in Figure 2.
FIG. 5 is an installation cross-sectional view of the first bracket shown in FIG. 1.
Figure 6 is a cross-sectional view of the installation of the second bracket shown in Figure 1.
Figure 7 is a flowchart showing the construction method of an earth retaining structure according to the first embodiment of the present invention.

Since the present invention can make various changes and have various embodiments, specific embodiments will be illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all changes, equivalents, and substitutes included in the spirit and technical scope of the present invention. While describing each drawing, similar reference numerals are used for similar components.

When a component is said to be "connected" or "connected" to another component, it is understood that it may be directly connected to or connected to the other component, but that other components may exist in between. It should be. On the other hand, when it is mentioned that a component is “directly connected” or “directly connected” to another component, it should be understood that there are no other components in between.

The terms used in this application are only used to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly dictates otherwise. In this application, terms such as “comprise” or “have” are intended to designate the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but are not intended to indicate the presence of one or more other features. It should be understood that this does not exclude in advance the possibility of the existence or addition of elements, numbers, steps, operations, components, parts, or combinations thereof.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person of ordinary skill in the technical field to which the present invention pertains. Terms defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and unless explicitly defined in the present application, should not be interpreted in an ideal or excessively formal sense. No.

In this document, “configured to” means “suitable for,” “having the ability to,” or “changed to,” depending on the situation, for example, in terms of hardware or software. ," can be used interchangeably with "made to," "capable of," or "designed to." In some contexts, the expression “a device configured to” may mean that the device is “capable of” working with other devices or components.

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the attached drawings. In order to facilitate overall understanding when describing the present invention, the same reference numerals are used for the same components in the drawings, and duplicate descriptions for the same components are omitted.

Figure 1 is a perspective view of an earth retaining structure according to a first embodiment of the present invention, Figure 2 is a partially exploded perspective view of Figure 1, Figure 3 is a perspective view of the first bracket shown in Figure 2, and Figure 4 is a perspective view of the first bracket shown in Figure 2. It is a perspective view of the second bracket shown, FIG. 5 is an installation cross-sectional view of the first bracket shown in FIG. 1, FIG. 6 is an installed cross-sectional view of the second bracket shown in FIG. 1, and FIG. 7 is a first embodiment of the present invention. This is a flowchart showing the construction method of an earth retaining structure according to an example.

The earth retaining structure according to this embodiment includes a plurality of CIPs (10, CIPs) arranged in the vertical direction, at least one H-PILE (20, H-Pile) arranged between the first CIPs (10), and , a first bracket 100 coupled to the outer peripheral surface of the first CIP 10, a second bracket 200 coupled to the outer peripheral surface of the second CIP 20, and the first bracket 100 or the second bracket It is mounted on at least one of the two brackets 200 and includes a wale 300 arranged in the horizontal direction.

The first CIP (10) is a CAST IN PLACED PILE, which is a cast-in-place pile that forms an earth retaining wall by excavating the ground with drilling equipment, inserting a reinforcing bar network, and then pouring concrete.

The second CIP (20) is a cast-in-place pile formed by inserting H-PILE into the perforated hole instead of the reinforcing bar mesh in the first CIP (10) and then pouring concrete.

The first CIP (10) and the second CIP (20) are general structures used for earth retaining construction and are common techniques to those skilled in the art, so detailed descriptions thereof will be omitted.

The second CIP (20) is disposed to increase the structural properties of the earth retaining structure, and in this embodiment, the second CIP (20) is disposed between two first CIPs (10).

Unlike this embodiment, the first CIP 10 and the second CIP 20 may be arranged alternately. Additionally, unlike the present embodiment, only the first CIP (10) may be arranged vertically and continuously, excluding the second CIP (20).

In the prior art, installation of the second CIP 20 was required to install and fix the wale 300 disposed in the horizontal direction, but in the present embodiment, the first bracket 100 and the second bracket 200 Due to the structural characteristics of ), if the soil layer is made up to the wall penetration depth, the earth retaining structure can be installed even if it consists only of the first CIP (10) with a reinforcing bar network inserted without the second CIP (20). .

In this embodiment, the second CIP (20) with built-in H-PILE is unrelated to the installation of the wale (300), and is intended to be changed to the thumb pile method in consideration of economic efficiency when the lower part of the excavation surface is made of rock layer.

The earth retaining structure according to the present embodiment forms a strip on the wall without reducing the rigidity of the first CIP (10) and the second CIP (20) through the first bracket (100) and the second bracket (200). It is possible to secure economic efficiency and safety by shortening unnecessary processes for connection.

In this embodiment, the first bracket 100 is coupled and fixed to the first CIP 10, and the second bracket 200 is coupled to and fixed to the second CIP 20.

Unlike the present embodiment, when the second CIP (20) is deleted and consists of only the first CIP (10), the second bracket 200 may be fixed to the first CIP (10).

The second bracket 200 is provided with a beam supporter 250 for temporarily holding the wale 300 when fixing the wale 300.

At least four files are required to install the strip 300.

In this embodiment, the first CIP (10) is arranged in the vertical direction with the first CIP (11) arranged in the vertical direction, and is in close contact with one side (the left side in this embodiment) of the first CIP (11). It includes a second CIP (12).

In this embodiment, the second CIP (20) is arranged in a vertical direction and is in close contact with one side (the left side in this embodiment) of the second CIP (12) and a vertical direction. It is arranged and includes a second H-PILE (22) in close contact with the other side (right side in this embodiment) of the first CIP (11).

Therefore, the first CIP (11) and the second CIP (12) are disposed between the first H-PILE (21) and the second H-PILE (22).

The first H-PILE (21), the second H-PILE (22), the first CIP (11), and the second CIP (12) are each formed in a cylindrical shape.

Reinforcing bars may be placed inside the first H-PILE (21) and the second H-PILE (22), and H beams may be placed inside the first CIP (11) and the second CIP (12). .

The first H-PILE (21), the second H-PILE (22), the first CIP (11), and the second CIP (12) are each formed vertically and arranged in the left and right directions.

The first bracket 100 includes a first bracket body 110 disposed to surround the outer peripheral surface 10a of a cylindrical pile, protrudes radially outward from the outer peripheral surface of the first bracket body 110, and the wale It includes a first spacing member 120 coupled to (300).

The first bracket disposed on the first CIP 11 is referred to as a 1-1 bracket 101, and the first bracket disposed on the second CIP 12 is referred to as a 1-2 bracket 102.

The first bracket body 110 is in close contact with the outer peripheral surface of the first CIP (10).

For this purpose, the first bracket body 110 is part of a cylindrical shape and has an arc shape when viewed from the top.

The radius of curvature of the first bracket body 110 corresponds to the radius of the first CIP (10). A first bracket fastening member (not shown) that penetrates the first bracket body 110 and is fixed to the first CIP 10 may be further disposed.

The first bracket fastening member may be disposed perpendicular to the outer peripheral surface of the first bracket body 110 and may be disposed toward the center of the first CIP 10.

The first spacing member 120 is disposed to eliminate the gap between the wale 300 and the first bracket body 110, and the first spacing member 120 is fixed in close contact with the wale 300. .

The first spacing member 120 includes a first close contact portion 125 that is in close contact with the wide surface of the wale 300, and is bent at one end of the first close contact portion 125 to form the first bracket body 110. ) a 1-1 coupling portion 121 coupled to the first coupling portion 122, and a 1-2 coupling portion 122 bent at the other end of the first close contact portion 125 and coupled to the first bracket body 110, It includes a 1-3 coupling part 123 disposed at the bottom of the first close contact part 125 and coupled to the first bracket body 110.

A first filling space 127 is formed inside the first close contact portion 125, the 1-1 coupling portion 121, the 1-2 coupling portion 122, and the 1-3 coupling portion 123. And, a filling member 150 may be further disposed in the first filling space 127. The filling space 127 is open on the upper side, and the remaining surface is closed.

The filling member 150 may be concrete. The filling member 150 is manufactured in the form of a bag, and the inside is filled with filler. The filler may be made of various materials that harden when immersed in water or poured with water, and is preferably dry concrete or dry cement.

The filling member 150 can be sprayed with water or dipped in water and then installed to allow the filler to harden. In particular, by mixing an elastic member with elasticity at a certain ratio in the filler, errors caused by temperature changes, etc. can be accommodated.

The elastic member included in the filling member 150 may be made of rubber, or may include various known materials such as synthetic resin, urethane foam, and styrofoam.

When drilling the ground, since the drilling position is not precise, the distance from the first CIP (10) and the second CIP (20) to the wale 300 may be different.

It is possible to correspond to the gap between the first CIP (10) and the wale (300) through the first spacing member (120). Depending on the interval, the length of the 1-1 coupling part 121 and the 1-2 coupling part 122 may be different, and the 1-1 coupling part 121 and the 1-2 coupling part ( 122) can be coupled to the first bracket body 110 by adjusting its length.

The 1-1 coupling portion 121, the 1-2 coupling portion 122, and the 1-3 coupling portion 123 of the first spacing member 120 are welded to the first bracket body 110. You can.

A fastening member may be further disposed to secure the strip 300 and the first spacer 120.

In order to fix the first bracket body 110 to the first CIP 10, a 1-1 body fastening member 111 and a 1-2 body fastening member 112 are installed. The 1-1 body fastening member 111 penetrates the upper side of the first bracket body 110 and is fastened to the first CIP 10, and the 1-2 body fastening member 112 is fastened to the first CIP 10. It penetrates the lower side of the first bracket body 110 and is fastened to the first CIP (10).

The wale 300 includes a first beam unit 310 of a large area, a second beam unit 320 disposed opposite to the first beam unit 320, and the first beam unit 310 and the second beam unit ( It includes a connecting beam 330 that connects 320).

The wale 300 has a general H-beam shape.

The second bracket 200 includes a second bracket body 210 disposed to surround the outer peripheral surface 20a of the cylindrical pile, and protrudes radially outward from the outer peripheral surface of the second bracket body 210, A second spacing member 220 coupled to the wale 300, and a beam supporter 250 coupled to the second bracket body 210, protruding outward in the radial direction and supporting the lower end of the wale 300. Includes.

If distinction is necessary, the second bracket placed on the first H-PILE (21) is referred to as the 2-1 bracket (201), and the second bracket placed on the second H-PILE (22) is referred to as the second bracket. -2 It is called bracket (202).

And the beam supporter placed on the first H-PILE (21) is called a first beam supporter, and the beam supporter placed on the second H-PILE (22) is called a second beam supporter.

The second bracket body 210 is in close contact with the outer peripheral surface of the second CIP (20).

For this purpose, the second bracket body 210 is part of a cylindrical shape and has an arc shape when viewed from the top.

The radius of curvature of the second bracket body 210 corresponds to the radius of the second CIP (20). A second bracket fastening member (not shown) that penetrates the second bracket body 210 and is fixed to the second CIP 20 may be further disposed.

The second bracket fastening member may be disposed perpendicular to the outer peripheral surface of the second bracket body 210 and may be disposed toward the center of the second CIP (20).

The second spacing member 220 is disposed to eliminate the gap between the wale 300 and the second bracket body 210, and the second spacing member 220 is connected to the first beam portion ( 310) and is fixed in close contact.

The second spacing member 220 is bent at one end of the second close contact portion 225 and the second close contact portion 225 and is in close contact with the first beam portion 310 of the wale 300. A 2-1 coupling portion 221 coupled to the bracket body 210, and a 2-2 coupling portion bent at the other end of the second close contact portion 225 and coupled to the second bracket body 210 ( 222) and a 2-3 coupling part 223 disposed at the lower end of the second close contact part 225 and coupled to the second bracket body 210.

A second filling space 227 is formed inside the second close contact portion 225, the 2-1 coupling portion 221, the 2-2 coupling portion 222, and the 2-3 coupling portion 223. And, a filling member 150 may be disposed in the second filling space 227. The filling space 227 is open on the upper side, and the remaining surface is closed.

It is possible to correspond to the gap between the second CIP (20) and the strip 300 through the second spacing member 220. The length of the 2-1 coupling part 221 and the 2-2 coupling part 222 can be adjusted according to the distance and installed on the second bracket body 210.

The 2-1 coupling portion 221, the 2-2 coupling portion 122, and the 2-3 coupling portion 223 of the second spacing member 220 are welded to the second bracket body 210. You can.

A fastening member is further disposed to secure the strip 300 and the second spacer 220.

In this embodiment, the first beam portion 310 is in close contact with the second spacer 220.

In order to fix the second bracket body 210 to the second CIP 20, a 2-1 body fastening member 211 and a 2-2 body fastening member 212 are installed. The 2-1 body fastening member 211 penetrates the upper side of the second bracket body 210 and is fastened to the second CIP 20, and the 2-2 body fastening member 212 is fastened to the second CIP 20. It penetrates the lower side of the second bracket body 210 and is fastened to the second CIP (20).

In this embodiment, the rear end of the beam supporter 250 is fixed to the second bracket body 210, and the front end is disposed as a free end. In this embodiment, the beam supporter 250 and the second bracket body 210 are welded.

In this embodiment, the beam supporter 250 is formed in an “L” shape in cross section.

The beam supporter 250 includes an upper supporter 252 arranged horizontally and a side supporter 254 bent downward from the upper supporter 232.

The 2-3 coupling portion 223 and the wale 300 may be mounted and supported on the upper side of the upper supporter 252.

The upper supporter 252 may be welded to the 2-3 coupling portion 223 and the second bracket body 210, thereby increasing the structural strength of the beam supporter 250. Through this, the load of the wale 300 can be sufficiently supported.

In this way, the earth retaining structure according to this embodiment has the feature of being able to be assembled with the wale 300 mounted on the beam supporter 250 while minimizing damage to the cured first CIP (10) and second CIP (20). there is.

Referring to FIG. 7, the construction method of the earth retaining structure according to this embodiment includes a drilling step (S10) and a step (S21) of constructing the first CIP (10) and the second CIP (20) in the drilled hole ( 22) and, after steps S21 and S22, excavating the ground to secure construction space (S30), and after step S30, attaching a first bracket 100 to the first CIP 10 in the construction space. Installing and installing the second bracket 200 on the second CIP 20 (S41) (S42), and after steps S41 and S42, the wale 300 is connected to the first beam supporter and the second beam. A step of placing it on a supporter (S50), and after step S50, a filling member 150 is placed in the first filling space 127 of the first bracket 100, and the filling member 150 is placed in the second filling space 127 of the second bracket 200. It includes the step of arranging the filling member 150 in the filling space 227 (S60) and the step of fixing the wale 300 and the beam supporter 250 (S80).

The construction method of the earth retaining structure according to this embodiment fastens the first bracket 100 and the second bracket 200 to the first CIP 10 and the second CIP 20, respectively, so that the first bracket 100 and the second bracket 200 are fastened to each other. It has the feature of shortening construction time on site while minimizing damage to the CIP (10) and the second CIP (20).

The construction method of the earth retaining structure according to this embodiment does not require cutting the cross-section of the second CIP (20) as in the prior art to fix the wale 300, and thus can prevent loss of the cross-section of the second CIP (20). , which has the feature of securing structural rigidity.

In particular, since the wale 300 can be mounted on the beam support 250, the use time of the crane can be minimized.

Since the construction method of the earth retaining structure according to this embodiment does not require an H beam inside the second CIP (20) for fixing the wale (300), the earth retaining structure can be completed with only the first CIP (10). It has the feature of significantly reducing materials.

In the detailed description of the present invention, specific embodiments have been described, but of course, various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the scope of the patent claims described later, but also by the scope of this patent claim and equivalents.

10: 1st CIP 20: 2nd CIP
100: 1st bracket 101: 1-1 bracket
102: 1-2 bracket 110: 1st bracket body
120: first spacing member 121: first coupling part 1-1
122: 1-2 coupling portion 125: first close contact portion
150: Filling member
200: 2nd bracket 201: 2-1 bracket
202: 2-2 bracket 210: 2nd bracket body
220 ; Second spacing member 221: 2-1 coupling part
222: 2-2 coupling part 225: 2nd close contact part
250: Beam supporter
251: 1st beam supporter 252: 2nd beam supporter
300: strip

Claims (5)

In the earth retaining structure,
A plurality of first CIPs 10 arranged in the vertical direction;
at least one second CIP (20) disposed between the first CIPs (10);
A first bracket (100) coupled to the outer peripheral surface of the first CIP (10);
A second bracket (200) coupled to the outer peripheral surface of the second CIP (20);
It includes a wale 300 mounted on at least one of the first bracket 100 or the second bracket 200 and disposed in the transverse direction,
The first CIP (10) is,
A first CIP (11) arranged in a vertical direction; It includes a second CIP (12) disposed in a vertical direction and in close contact with one side of the first CIP (11),
The second CIP (20) is,
A first H-PILE (21) arranged in a vertical direction and in close contact with one side of the second CIP (12); It includes a second H-PILE (22) arranged in the vertical direction and in close contact with the other side of the first CIP (11),
The first bracket 100 includes a 1-1 bracket 101 disposed on the first CIP 11; It includes a 1-2 bracket (102) disposed on the second CIP (12),
The second bracket 200 includes a 2-1 bracket 201 disposed on the first H-PILE 21; It includes a 2-2 bracket (202) disposed on the second H-PILE (22),
Each of the 1-1 bracket 101 and the 1-2 bracket 102,
A first bracket body (110) arranged to surround the outer peripheral surface (10a) of the cylindrical pile;
A first spacing member (120) protruding outward in the radial direction from the outer peripheral surface of the first bracket body (110) and coupled to the wale (300).
delete delete delete A plurality of first CIPs 10 arranged in the vertical direction;
at least one second CIP (20) disposed between the first CIPs (10);
A first bracket (100) coupled to the outer peripheral surface of the first CIP (10);
A second bracket (200) coupled to the outer peripheral surface of the second CIP (20);
It includes a wale 300 mounted on at least one of the first bracket 100 or the second bracket 200 and disposed in the transverse direction,
The first CIP (10) is,
A first CIP (11) arranged in a vertical direction; It includes a second CIP (12) disposed in a vertical direction and in close contact with one side of the first CIP (11),
The second CIP (20) is,
A first H-PILE (21) arranged in a vertical direction and in close contact with one side of the second CIP (12); It includes a second H-PILE (22) disposed in the vertical direction and in close contact with the other side of the first CIP (11),
The first bracket 100 includes a 1-1 bracket 101 disposed on the first CIP 11; It includes a 1-2 bracket (102) disposed on the second CIP (12),
The second bracket 200 includes a 2-1 bracket 201 disposed on the first H-PILE 21; It includes a 2-2 bracket (202) disposed on the second H-PILE (22),
Each of the 1-1 bracket 101 and the 1-2 bracket 102,
A first bracket body (110) arranged to surround the outer peripheral surface (10a) of the cylindrical pile;
In an earth retaining structure including a first spacing member (120) that protrudes radially outward from the outer peripheral surface of the first bracket body (110) and is coupled to the wale (300),
A drilling step (S10) of forming holes in the ground for construction of the first CIP (10) and the second CIP (20);
Steps of constructing the first CIP (10) and the second CIP (20) in the drilled hole (S21) (22);
A step of securing construction space by excavating the ground after steps S21 and S22 (S30);
After step S30, a step (S41) of installing the first bracket 100 on the first CIP 10 and installing the second bracket 200 on the second CIP 20 in the construction space (S41) S42);
After steps S41 and S42, a step (S50) of attaching the wale 300 to the beam supporter 250 of the second bracket 200;
After step S50, the filling member 150 is placed in the first filling space 127 of the first bracket 100, and the filling member 150 is placed in the second filling space 227 of the second bracket 200. ) placing step (S60);
A construction method of an earth retaining structure comprising a step (S80) of fixing the wale 300 and the beam supporter 250.

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