KR101448216B1 - Retaining wall with multiple pile - Google Patents

Abstract

The present invention relates to a retaining wall that is configured to have an earth plate which is provided between piles and, more particularly, to a retaining wall provided with multiple piles in which a main H pile and an auxiliary H pile are coupled with each other to resist earth pressure and pile falling is prevented to strengthen a pile supporting force. The retaining wall provided with multiple piles according to the present invention has a plurality of the multiple piles that are embedded under the ground to be apart from each other at a predetermined gap and the earth plate that is provided between the multiple piles. The multiple piles have the main H pile that has a flange and a web and the auxiliary H pile that has a flange and a web with a front surface flange being coupled with a back surface flange of the main H pile, an upper end of the auxiliary H pile matching with the main H pile and a lower end of the auxiliary H pile being shorter in length than the main H pile. The earth plate is provided between a front surface flange and the back surface flange of the main H pile.

Description

{Retaining wall with multiple piles}

The present invention relates to an earth retaining wall composed of a earth plate provided between a file and a file, which has a structure in which an auxiliary H file is combined with a main H file to prevent earth leakage, To the earth retaining wall.

In order to stabilize the ground excavation surface in the construction of the underground structure, the earthworks will be constructed as a temporary construction in order to facilitate the construction of the structure easily and safely.

Recently, various restraining methods have been used in addition to the conventional sheet pile method, the horizontal pile method, the underground continuous wall method, the submerged wall wall method, and the like, as various limitations such as deepening depth of underground excavation and suppressing the influence of adjacent buildings have been proposed .

Among the abovementioned retaining methods, the horizontal sheet pile method is to prevent the collapse of the gravel by inserting a plurality of H-shaped steel piles into the ground so as to be spaced apart at regular intervals and then installing a soil plate between adjacent piles.

Generally, in case of installing excavation works, it is necessary to examine the ground conditions such as stress and deformation of the earth retaining walls, deformation of surrounding ground, construction conditions and order of excavation.

Especially, the deformation of the earth retaining walls may be caused by the elevation of the bottom of the excavation or the decrease of the strength of the ground, which ultimately interferes with the construction of the main body structure and may cause a problem in the stability of the excavated soil.

For example, in the case of the horizontal sheet pile method, if earth pressure is different between the front and back of the earth retaining wall, the earth retaining wall may collapse along with the conduction of the H-beam. These problems are more likely to occur in soft ground such as soil layer or weathered rock layer, and the soft ground may deform the use of the earth retaining wall because the deformation amount of the retaining wall is relatively large.

Therefore, the pile bearing capacity should be reinforced so as to effectively resist the earth pressure and to prevent the pile turning.

SUMMARY OF THE INVENTION In order to solve the above problems, the present invention provides an earth retaining wall having multiple piles capable of effectively supporting the earth pressure and reinforcing the pile supporting force so as to prevent the pile turning.

The present invention can prevent the deformation of the earth retaining wall by reinforcing the pile support force against the earth pressure in the case of the ground layer or the soft ground such as the soil layer or the weathered rock layer and secure the stability of the excavation ground without causing any trouble to the construction of the main body structure To provide a retaining wall with multiple files.

According to an aspect of the present invention, there is provided a method of manufacturing a multi-pile vehicle including a plurality of multi-piles interlaced at a predetermined interval and a multi-pile multi- And the front flange is coupled to the rear flange of the main H file, and the upper end thereof is made up of the auxiliary H file having a length shorter than that of the main H file, and the lower end thereof is composed of the main H file and the flange Wherein the main H file is located in a pre-formed perforation hole in the ground, the auxiliary H file is located in a ground behind the perforation hole, the soil plate is provided between the front flange and the rear flange of the main H file, A pneumatic wall protection casing is provided in the upper part of the casing, and a guide of the auxiliary H file is inserted into the ground at the back side of the casing. Wherein the incision part is formed to pass through the upper and lower parts.

According to another preferred embodiment of the present invention, the lower end of the main H file is inserted up to the bedrock layer, and the lower end of the auxiliary H file is inserted up to the upper part of the bedrock layer.

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According to another preferred embodiment of the present invention, the auxiliary H file is formed by overlapping at least two H files by connecting the flanges together.

According to another preferred embodiment of the present invention, there is provided a soil retaining wall having multiple piles, characterized in that the soil plate is a sheet pile or an arcuate soil plate whose center portion is convex to the ground side.

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According to another preferred embodiment of the present invention, there is provided an earth retaining wall having multiple piles, characterized in that the cut-out portion is provided with a spacer which is slidable downwardly upon insertion of the auxiliary H-file to be detachable.

According to another preferred embodiment of the present invention, the spacer comprises a spacer body inserted into the cut-out portion and a flange portion protruding from both ends of the spacer body at both ends, respectively.

According to another preferred embodiment of the present invention, guide portions are formed on both rear side surfaces of the incision portion of the casing, and a flange portion facing the guide portion is formed with a guide portion engaged with the guide portion at a position corresponding to the guide portion The present invention provides an earth retaining wall provided with multiple files.

The present invention has the following effects.

First, by reinforcing the file bearing capacity of the auxiliary H file by combining it with the main file, it is possible to effectively resist the earth pressure and prevent the file from turning.

Second, by making the lower end of the auxiliary H file shorter than the main H file and preferably into the weathered rock layer, it is possible to reinforce the file supporting force against the soft ground such as the soil layer or the weathered rock layer. Therefore, it is possible to prevent the deformation of the earth retaining wall and to ensure the stability of the excavated ground without causing any trouble to the construction of the main body structure.

Third, the main H file is inserted through the perforated holes formed up to the rock layer and the auxiliary H file is inserted into the ground with the striking equipment, so that the perforation hole is formed small, .

Fourthly, in the case of the soft ground, by forming the cut-out portion on the rear surface of the pneumatic protection casing and placing the slidable spacer along the cut-out portion, it is possible to construct multiple files without interference between the auxiliary H file and the casing.

1 is a perspective view showing an embodiment of multiple files constituting the present invention;
FIG. 2 is a plan view showing a part of an earth retaining wall provided with multiple files according to the present invention incorporated in the ground; FIG.
3 is a perspective view showing another embodiment of multiple files constituting the present invention;
4 is a plan view showing various embodiments of multiple files constituting the present invention;
5 is a cross-sectional view showing multiple files inserted into the ground;
FIG. 6 is a perspective view showing an earth retaining wall provided with multiple files according to the present invention incorporated in the ground; FIG.
7 is a plan view showing a casing inserted into the perforation hole;
8 is a plan view showing a coupling relationship between the cutout portion and the spacer;
9 is a perspective view of a casing for showing a coupling relationship between a cutout portion and a spacer;
10 is a perspective view showing an auxiliary H file inserted into a cut-out portion of the casing;

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

FIG. 1 is a perspective view showing an embodiment of multiple files constituting the present invention, and FIG. 2 is a plan view showing a part of an earth retaining wall provided with multiple files of the present invention incorporated in the ground.

As shown in FIGS. 1 and 2, the earth retaining walls provided with the multiple files of the present invention have a plurality of multiple files 10 inserted into the ground 1 so as to be spaced apart from each other by a predetermined distance, Wherein the multiple pile 10 includes a main H file 11 and flanges 121a and 121b and flanges 121a and 121b formed of flanges 111a and 111b and a web 112, And the front flange 121a is coupled to the rear flange 111b of the main H file 11 so that the upper end is coincident with the main H file 11 and the lower end is longer than the main H file 11 And a short auxiliary H file 12. The soil plate 20 is provided between the front flange 111a and the rear flange 111b of the main H file 11.

The multiple files 10 are constructed by mutually coupling the main H file 11 and the auxiliary H file 12 constituted by the upper and lower flanges and the web so that the flanges face each other. (1).

The multiple files 10 can be spaced apart in consideration of the strength of the soil plate, the earth pressure of the back ground, the height of the retaining wall, and the like.

The main H file 11 and the auxiliary H file 12 are formed by combining the rear flange 111b of the main H file 11 and the front flange 121a of the auxiliary H file 12 to form the multiple files 10 do.

Here, the 'front' is the part exposed to the outside of the earth retaining wall according to the excavation of the ground, and the 'rear' is the part continuously facing the ground without being exposed to the outside.

The auxiliary H file 12 serves to resist the earth pressure like the main H file 11. The flanges of the auxiliary H-file 12 serve as anchors to be fixed to the ground 1 and prevent the file from being conducted.

The coupling of the auxiliary H files 12 can increase the cross sectional efficiency because the neutral axis moves to the rear side than when the main H file 11 is used alone.

The upper end of the multiple file 10 is characterized in that the height of the main H file 11 matches the height of the auxiliary H file 12 and the lower end of the auxiliary H file 12 is shorter than the main H file 11 .

As shown in FIG. 5, the auxiliary H file 12 is located on a soft ground such as the soil layer 1a or the weathered rock layer 1b, which is the upper ground, so as to reinforce the file supporting force.

The soil plate 20 is provided between the front flange 111a and the rear flange 111b of the main H file 11 and blocks the space between adjacent multiple piles 10 so that the rear soil is introduced into the excavation soil .

3 is a perspective view showing another embodiment of multiple files constituting the present invention.

3, 4 (b), 5, and the like, in the present invention, the auxiliary H file 12 is formed by overlapping at least two H files by connecting the flanges together.

In the case where a plurality of auxiliary H files 12 are overlapped, the file supporting force against the earth pressure can be further reinforced in the soil layer 1a and the weathering-resistant layer 1b. In addition, since a plurality of H file flanges are fixed in the ground 1, the conduction of the files can be further suppressed.

The adjacent auxiliary H-files 12 combine and integrate the facing flanges with bolts B and nuts to one another.

FIG. 4 is a plan view showing various embodiments of multiple files constituting the present invention, and FIG. 5 is a sectional view showing multiple files inserted into the ground.

5, the lower end of the main H file 11 is inserted up to the bedrock layer 1c, and the lower end of the auxiliary H file 12 is inserted up to the upper part of the bedrock layer 1c .

The perforation hole 2 can be formed up to the inside of the bedrock layer 1c by using the perforating equipment so that the main H file 11 can be inserted up to the bedrock layer 1c and the casing may also be necessary in this case .

The length of the auxiliary H-file 12 is determined according to the ground survey result so that it is inserted into the bottom of the weathered rock layer 1b, that is, the upper part of the bedrock layer 1c.

Therefore, in the relatively stable bedrock layer (1c), the soil (1) and the main H file (11) resist the earth pressure and in the soil layer (1a) and the weathered rock layer (1b) It can be combined with the file 11 to strengthen the file supporting force.

4 (a) to 4 (b), the main H file 11 is located inside the perforation hole 2 previously formed in the ground 1, and the auxiliary H file 12 is located inside the perforation hole 2, And can be located on the ground 1 behind the perforation hole 2.

Generally, if the size of the perforation hole 2 is large, there is a problem of cost burden and air increase due to use of a large equipment. Therefore, it is preferable to form the perforation hole 2 as small as possible.

In addition, it is difficult to close the pile directly to the ground in a stratified rock layer.

Therefore, in the present invention, the perforation hole 2 is previously drilled up to the uppermost rock layer to allow the main H file 11 to enter the ground 1 through the perforation hole 2, The short auxiliary H file 12 is inserted only up to the weathering layer 1b so that the short auxiliary H file 12 is struck by the equipment such as a vibro hammer without the perforation hole 2 and inserted directly into the ground 1.

Therefore, the perforation hole 2 is formed only to the extent that the main H file 11 is inserted, and the main H file 11 and the auxiliary H file 12 are formed in the main H file 11 of the multiple files 10 are first inserted into the perforation hole 2 to descend the multiple files 10 and then the lower ends of the auxiliary H files 12 are brought into contact with the ground 1, (1). ≪ / RTI >

In the lower part of the perforation hole 2, it is possible to form a concave portion concrete as the case may be.

The near-end concrete is provided up to a certain distance from the bottom of the perforation hole (2), and maintains the file stability during construction and serves as a shear key for the ground activity after construction.

Therefore, it is possible to effectively prevent the collapse of the back ground and improve the safety of the earth retaining wall even if the front ground is excavated before the retaining wall is installed.

6 is a perspective view showing an earth retaining wall provided with multiple files according to the present invention inserted in the ground.

The earth plate 20 positioned between the adjacent multiple files 10 may be made of various materials such as wood, metal, synthetic resin, etc., and may be formed of a plate-shaped sheet pile or an arcuate plate 20 having a central portion convexly formed toward the ground 1, .

Particularly, the arcuate soil plate 20 is configured to protrude from the rear surface of the earth retaining wall, so that it can withstand the compressive force acting on the rear surface of the soil plate 20 and can easily make the upper and lower soil plate joining at the front of the earth retaining wall.

FIG. 7 is a plan view showing a casing inserted into the perforation hole, FIG. 8 is a plan view showing a coupling relation between the cutout portion and the spacer, and FIG. 9 is a perspective view of the casing for showing the coupling relationship between the cutout portion and the spacer to be. And Fig. 10 is a perspective view showing an auxiliary H file inserted into the cut-out portion of the casing.

7 to 9, in the present invention, a pneumatic wall protection casing 30 is provided in the upper part of the perforation hole 2, and auxiliary piles 12 are formed on the rear side of the casing 30, And a cut-out portion 31 for guiding the web 122 of the web to be inserted into the ground.

The multiple piles 10 are inserted into the perforation hole 2 and are inserted into the perforation hole 2 at a predetermined height to allow the pouring concrete to be poured up to a predetermined height below the perforation hole 2, . However, in the case of the soft ground, if the pneumatic wall protecting casing 30 is provided inside the perforation hole 2, the casing 30 interferes with the insertion of the auxiliary H file 12. [ The incision 31 is formed on the rear surface of the casing 30 so that the web 122 of the auxiliary H file 12 passes through the cutout 31 and the auxiliary H file 12 and the casing 30 have caused the multiplexed file 10 to be inserted into the ground.

The casing 30 is mainly provided with a portion of the soil layer 1a having a high risk of airborne collapse and the cutout portion 31 is formed to penetrate from the upper end to the lower end of the casing 30, The auxiliary H file 12 is inserted.

8 to 9, the cutter 31 may be provided with a spacer 32 which is slidable downwardly upon insertion of the auxiliary H file 12 so as to be detachable therefrom.

Before the auxiliary H file 12 is inserted into the casing 30, the cut portion 31 of the casing 30 can be closed by the earth pressure.

The cutout 31 of the casing 30 is blocked by the spacer 32 and the web 122 of the auxiliary H-file 12 is moved along the cutout 31 when the auxiliary H- The spacer 32 is removed while sliding the spacer 32 downward.

The spacer 32 may be composed of a spacer main body 321 inserted into the cutout portion 31 and flange portions 322 protruding from both ends of the spacer main body 321 on both sides.

The flange portion 322 is provided to prevent the spacer 32 from being released into or out of the casing 30 before the casing 30 is installed on the ground.

The spacer 32 composed of the spacer main body 321 and the flange portion 322 has a generally H-shaped cross section.

A guide portion 311 is formed on both rear sides of the cutout portion 31 of the casing 30 and a flange portion 322 facing the guide portion 311 is formed at a position corresponding to the guide portion 311 And a guide portion 323 engaged with the guide portion 311 may be formed.

The external earth pressure does not act on the casing 30 before the casing 30 is press-fitted into the ground, so that the casing 30 may be opened along the portion of the cutout 31 to detach the spacer 32.

Therefore, in the present invention, the guide portion 311 of the casing 30 and the guide portion 323 of the spacer 32 are engaged with each other to prevent the casing 30 from spreading along the cutout portion 31.

8 (a), when the guide portion 311 is protruded from the rear surface of the casing 30, the guide portion 323 may be formed in a different shape from the guide portion 321, A groove having a predetermined depth may be formed so that the guide portion 311 is inserted.

8 (b), when the guide portion 311 is formed as a groove portion on the rear surface of the casing 30, the guide portion 323 may be formed in a protruding shape to be inserted into the guide portion 311 It is possible.

The earth retaining walls provided with the multiple files of the present invention can be constructed in the following order.

First, multiple files 10 constituted by the main H file 11 and the auxiliary H file 12 are produced.

The multiple files 10 can be inserted directly into the ground, but are preferably inserted into the perforation holes 2 formed in the ground using perforation equipment. At this time, the perforation hole 2 may be formed in the size of the main H file 11 inserted up to the bedrock layer 1c or more.

Next, the multiple files 10 are inserted into the perforation hole 2, and in some cases, the perforated hole 2 is laid down to a predetermined height below the perforation hole 2, Into the perforation hole (2). The multiple files 10 can be inserted into the perforation hole 2 by their own weights and only the main H file 11 of the multiple files 10 is inserted into the perforation hole 2, It is also possible to insert the remainder of the multiple files 10 by striking with striking equipment when the bottom touches the top surface of the ground.

In this case, the web 122 of the auxiliary H-file 12 may be provided at the upper end of the hollow hole 2 in the case of the soft ground, The auxiliary H-file 12 is inserted into the ground with the main H-file 11 while sliding the spacer 32 downward along the main H-file 31.

After the insertion of the multiple files 10 is completed, backfilling is performed inside the perforation hole 2, and when the near-side concrete is formed, the near-side concrete is cured. In addition, the soil plate 20 is installed sequentially from the top while excavating the entire ground of the earth retaining wall.

Thereafter, the foundation is formed on the excavated soil, and the concrete wall is formed on the entire surface of the earth plate 20.

1: Soil 1a: Soil layer
1b: weathered rock layer 1c: bedrock layer
2: Perforation hole 10: Multiple files
11: Main file 111a, 111b: Flange
112: Web 12: Auxiliary H file
121a, 121b: flange 122: web
20: turntable 30: casing
31: incision section 311: guide section
32: Spacer 321: Spacer body
322: flange portion 323: guide portion
B: Bolt

Claims (9)

(10) sandwiched in the ground (1) so as to be spaced apart from each other by a predetermined distance and a soil plate (20) sandwiched between the multiple files (10)
The multiple file 10 is constituted by the main H file 11 and the flanges 121a and 121b and the web 122 constituted by the flanges 111a and 111b and the web 112, The upper H file 11 is connected to the rear flange 111b of the H file 11 and the lower end of the auxiliary H file 12 is shorter than the main H file 11,
The main H file 11 is located inside the perforation hole 2 previously formed in the ground 1 and the auxiliary H file 12 is located on the ground 1 behind the perforation hole 2,
The soil plate 20 is provided between the front flange 111a and the rear flange 111b of the main H file 11,
A pneumatic wall protection casing 30 is provided in the upper part of the perforation hole 2 and a rear side of the casing 30 is provided with a cut-off portion for guiding the web 122 of the auxiliary H- (31) are vertically penetratingly formed.
The method of claim 1,
The lower end of the main H-file 11 is inserted into the bedrock layer 1c and the lower end of the auxiliary H-file 12 extends up to the upper part of the bedrock layer 1c. .
delete The method of claim 1,
Wherein the auxiliary H file (12) is formed by overlapping at least two H files by connecting the flanges together.
The method of claim 1,
Wherein the soil plate (20) is a sheet pile or an arcuate soil plate (20) whose central portion is convex toward the ground (1) side.
delete The method of claim 1,
Wherein the cutter (31) is provided with a spacer (32) sliding downwardly upon insertion of the auxiliary H file (12) so as to be detachable.
8. The method of claim 7,
Wherein the spacer 32 comprises a spacer main body 321 inserted into the cutout portion 31 and a flange portion 322 protruding from both ends of the spacer main body 321 on both sides thereof. Wall cladding.
9. The method of claim 8,
A guide portion 311 is formed on both rear sides of the cutout portion 31 of the casing 30 and a flange portion 322 facing the guide portion 311 is formed at a position corresponding to the guide portion 311 And a guiding part (323) engaging with the guiding part (311) is formed on the upper surface of the wall.

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