KR102091972B1 - H-pile for earth retaining wall and construction method of earth retaining wall using the same - Google Patents

Abstract

The present invention relates to an H-pile for retaining earth and an H-pile earth-retaining method using the same. More specifically, the H-pile for retaining earth comprises: an H-pile wherein one end thereof buried in ground maintains a line state perpendicular to the ground, and the other end thereof protruding from the ground is bent into prescribed curvature with respect to the one end thereof to apply prestress; and a bending maintaining member which has a length corresponding to the length of the H-pile, and is formed to be attached to a bent surface of the H-pile to allow the H-pile to maintain bending. The H-pile with the bending maintaining member attached thereto is buried in the ground while being bent into the prescribed curvature. According to the present invention, prestress is applies to the H-pile and the prestress is maintained by the bending maintaining member. Therefore, an H-pile can be erected without using a strut or a furring strip. Even if soil pressure supported by an H-pile is very large to require struts or furring strips, the number of struts or furring strips to use can be reduced. Also, since the bending maintaining member maintaining bending of the H-pile is buried in soil of the ground and is not exposed to the excavated outside, the bending maintaining member is not damaged during excavation construction. Since prestress is applied by bending of the H-pile and the bending maintaining member maintaining the bending, large prestress can be applied while reducing deformation of the H-pile. Work is easily performed since prestress does not need to be applied while installing an H-pile in a drilled hole.

Description

{H-pile for earth retaining wall and construction method of earth retaining wall using the same}

The present invention relates to a thumb pile for mud and a thumb pile mud construction method using the same, and more particularly, to a thumb pile for mud and a thumb pile mud construction method using the prestress is applied by bending processing and attached with a bending holding member. .

In general, a mudguard is a temporary structure installed in an excavated underground space to prevent the ground from collapsing when constructing an underground structure.

In the case of the conventional method of mudguard, the thumb pile is installed on the ground at regular intervals, and at the same time as excavation, the earth plate is sandwiched between the two thumb piles, the mud wall is installed, and then the strut is installed to support the mud wall. Is done.

However, in the case of performing the high-depth trenching method, the thumb pile retaining method according to the prior art cannot resist the earth pressure of the soil behind the H-beam thumb pile alone, so a large number of props must be used to reinforce it. In addition, this method is not only economical, but also makes it difficult to secure a working space and is structurally inefficient, which may cause the surrounding ground to sink.

In addition, the mudguard structure according to the conventional method may be configured to act as a earth wall as a rigid body, but there is a problem in that the displacement of the upper head can be relatively large, so that the displacement of the upper head is relatively large.

Many related technologies have been proposed to solve this problem.

As an example, Republic of Korea Patent Registration No. 10-584701 discloses the invention of the name "hypothetical mudguard construction method". This temporary mud construction method applies prestress to the vertical pile, where the side pressure of the excavated soil wall directly acts, to have a moment that greatly resists the side pressure of the soil wall, so that it can be constructed while using only minimal reinforcement transverse and braces. When constructing an underground structure, it is possible to construct the underground structure while removing the support step by step so that interference caused by the support is excluded.

However, in the case of the above-described hypothetical retaining method, the brackets to which the tension members are fitted are arranged and fixed in the zigzag form on the inner sides of both flanges of the vertical piles. It is difficult to fit the earth plate between the files, and there is a problem in that the structure is complicated because a tension member is installed inside the vertical file and a pedestal is used.

As another example, Korean Patent Registration No. 10-1729117 discloses an invention entitled "A method of constructing a self-supporting temporary mud using a pile and a strut with prestress". Such a construction method can maximize the spacing of the strut or raker by allowing the thumb pile to which the prestress is introduced to receive an increasing back pressure during the excavation, so that the number of struts or rakers can be reduced.

However, the thumb piles used in the construction method of this mudguard are provided with reinforcement plates, brackets, and tensile materials, which are structures for applying prestress to the front exposed to the outside, so when excavating the ground or when constructing underground facilities There is a problem that there is a high risk of damage to the structure applying the. In addition, there is also a problem that the construction of the thumb pile is complicated because the thumb pile is buried in the perforation hole and the tension member is tensioned and fixed using a hydraulic tension machine.

The present invention was devised in view of the above problems, and after bending the H-shaped file so as to support the earth pressure corresponding to the depth of excavation, after applying pre-stress, a bending holding member is installed on the bending surface of the H-shaped file The object of the present invention is to provide a thumb pile for mud and a thumb pile mud construction method using the same, by enhancing the resistance of the H-type pile supporting the soil pressure.

The present invention to achieve the above object,

An H-shaped file in which one end portion embedded in the ground maintains a straight line perpendicular to the ground, and the other end protruding from the ground is bent at a constant curvature with respect to the one end to apply prestress; And

It includes a bend holding member having a length corresponding to the length of the H-shaped pile, is attached to the bending surface of the H-shaped pile to form the H-shaped pile to maintain the bending;

The H-shaped pile to which the bending holding member is attached provides a thumb pile for retaining, characterized in that it is buried in the ground in a state of being bent at a certain curvature.

In one embodiment of the present invention, the bending holding member is formed of a strip-shaped plate material, and may be vertically attached to one surface of the H-shaped pile.

In one embodiment of the present invention, the bending holding member may be supported by a plurality of reinforcing pieces installed on one side of the H-shaped pile on both sides.

In one embodiment of the present invention, a straight extension file installed at the bottom of the H-shaped file; And a connecting plate connecting the H-type file and the extension file.

In one embodiment of the present invention, the bending holding member may have a cross section of any one of a cross (+) shape and a T shape.

Thumb pile construction method according to another aspect of the present invention,

One end of the H-shaped pile embedded in the ground maintains a straight line perpendicular to the ground, and the other end of the H-shaped pile protruding from the ground is bent to the H-shaped file so as to bend at a constant curvature with respect to the one end. Processing to apply prestress to the H-type file;

Manufacturing a thumb pile for retaining by attaching a bending holding member having a length corresponding to the length of the H-shaped pile to a bending surface of the H-shaped pile so that the H-shaped pile maintains bending;

Forming a perforation hole by drilling at regular intervals in the ground;

A step of bending the thumb pile for the earth retaining film to which the perforation hole is bent at a predetermined curvature and the bending holding member is attached;

Filling sand around the thumb pile for the mud wall inserted into the perforation hole; And

It may include; excavating the front part of the thumb pile for the mudguard, and installing a steel plate.

According to the thumb pile for mudguard and the thumb pile mud construction method according to an embodiment of the present invention having the structure as described above, since the prestress is applied to the H-type pile and the prestress is maintained by the bending holding member, the strut or the belt length There is an effect that you can freeze the thumb pile without using. If the soil pressure supported by the thumb pile is very large, even if a strut or a belt is required, there is an effect that the number of use of the strut or a belt is reduced.

In addition, according to an embodiment of the present invention, according to the thumb pile for mudguard and the thumb pile mud construction method using the same, the bending holding member for maintaining the bending of the H-type pile is embedded in the soil of the ground and is not exposed to the outside being excavated. , There is an effect that the bending holding member is not damaged during the excavation construction.

In addition, the thumb pile for mudguards according to an embodiment of the present invention and the thumb pile mud construction method using the same are less deformed in the H-type pile because the prestress is applied by the bending of the H-type pile and the bending holding member that maintains the bending. It has the effect of being easy to work in that it is possible to apply a large pre-stress, and there is no need to apply the pre-stress during the installation of the thumb pile in the hole.

1 is a partial perspective view showing a mudguard structure using a mudguard thumb pile according to an embodiment of the present invention.
Figure 2 is a side view showing a thumbtack for mud according to an embodiment of the present invention installed on the ground.
Figure 3 is a perspective view showing a thumbtack for mudguards according to an embodiment of the present invention.
4 is a perspective view showing a thumb pile for mudguard according to another embodiment of the present invention.
5 is a perspective view showing a thumb pile for mudguard according to another embodiment of the present invention.
Figure 6 is a perspective view showing a thumbtack for mudguard according to another embodiment of the present invention.
7A and 7B are plan views showing a case where the earth plate is installed between the bending holding members.
8 is a front view showing a thumbtack for mudguards according to another embodiment of the present invention.
9 is a front view showing a thumb pile for retaining according to another embodiment of the present invention.
10 is a side view showing a thumb pile for mudguard according to another embodiment of the present invention installed on a ground.
11A to 11F are views for explaining a method for constructing a thumb pile according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail with respect to embodiments of the thumb pile using the mud and the mud retaining method using the same according to the present invention.

It should be understood that the embodiments described below are illustratively shown to help understanding of the present invention, and that the present invention can be implemented in various ways different from the embodiments described herein. However, in the following description of the present invention, when it is determined that a detailed description of related known functions or components may unnecessarily obscure the subject matter of the present invention, the detailed description and specific illustration will be omitted. In addition, the accompanying drawings may not be drawn to scale in order to aid the understanding of the invention, but the dimensions of some components may be exaggerated.

1 is a partial perspective view showing a mudguard structure using a mudguard thumb pile according to an embodiment of the present invention. Figure 2 is a side view showing a thumbtack for mud according to an embodiment of the present invention installed on the ground. Figure 3 is a perspective view showing a thumbtack for mudguards according to an embodiment of the present invention.

Referring to FIG. 1, the mudguard structure 1 according to an embodiment of the present invention prevents the ground 3 from collapsing when excavating the ground 3 and blocks water such as groundwater from flowing in or out. As a thing, includes a plurality of earthing plates 20 installed between a plurality of earthing thumb piles 10 and two adjacent earthing thumb piles 10 according to an embodiment of the present invention installed on the ground 3 at regular intervals can do.

Each of the plurality of retaining thumb piles 10 may include an H-shaped pile 11 and a bending holding member 15. As shown in FIG. 2, the plurality of soil pile thumb piles 10 have a certain portion of the lower portion buried in the ground 3 and are disposed at regular intervals. Since the plurality of thumbtacks 10 for mudguards are formed in the same way, only one thumbstick 10 for mudguards will be described below.

The H-shaped pile 11 is formed of a metal material such as steel. The H-shaped pile 11 includes a web 14 and flanges 12 and 13 installed parallel to both ends of the web 14.

The H-shaped pile 11 is bent at a constant curvature. Specifically, one end of the H-shaped pile 11 embedded in the ground 3 maintains a straight line perpendicular to the ground 3, and the other end of the H-shaped pile 11 protrudes from the ground 3, The end is bent at a constant curvature. Therefore, the H-shaped pile 11 includes a bent portion 11b that extends from the straight portion 11a and the straight portion 11a and is bent at a constant curvature. When the H-shaped pile 11 is bent, the inner flange 12 facing the ground is concave and the outer flange 13 exposed to the outside is convex.

When the H-shaped pile 11 is bent in this way, the pre-stress can be applied to the H-shaped pile 11. At this time, the H-shaped pile 11 is bent so that the point of the reaction force supporting the earth pressure is located below the excavated bottom surface.

The bending processing of the H-shaped pile 11 can be performed using a roller or the like. That is, the H-shaped pile 11, which is a market product, can be bent at a constant curvature using a roller to form the H-shaped pile 11 to which prestress is applied. In addition, the H-shaped file may be manufactured in a bending shape from the beginning by another method.

The amount of bending of the H-shaped pile 11 can be determined according to the earth pressure. When the earth pressure to be supported by the H-shaped pile 11 increases, it is necessary to increase the prestress applied to the H-shaped pile 11. When the bending amount of the H-type pile 11 is increased, the prestress increases, and therefore, when the earth pressure is large, it is necessary to increase the bending amount of the H-type pile 11. For example, when excavating the ground to a depth D of about 5 to 6 m, the bending amount of the H-shaped pile 11 can be about 3 cm or less. At this time, the amount of bending of the H-shaped pile 11 refers to the displacement (Δ) of the upper end with respect to the lower end of the H-shaped pile in FIG. 2.

The bending holding member 15 is installed on the H-shaped pile 11 so that the H-shaped pile 11 is kept in a bent state. Specifically, the bending holding member 15 has a length corresponding to the length of the H-shaped pile 11 and is attached to the bent surface of the H-shaped pile 11, that is, attached to the flange 12, the H-shaped pile 11 ) Is formed to maintain bending. That is, the bending holding member 15 is attached to the bent surface of the H-shaped pile 11, that is, the flange 12 facing the ground (3). Therefore, the bending holding member 15 is embedded in the ground 3 in a state attached to the H-shaped pile 11, and is not exposed to the excavation surface.

Referring to Figure 3, the bending holding member 15 according to this embodiment is formed of a strip-shaped plate material. That is, the bending holding member 15 is formed of a metal plate having a narrow width, and is vertically attached to one surface 12 of the H-shaped pile 11. For example, the bending holding member 15 is formed of an iron plate, and may be attached to the flange 12 of the H-shaped pile 11 by welding. At this time, the band-shaped bending holding member 15 may be installed along the length of the H-shaped pile 11 at a position corresponding to the center of the flange 12 of the H-shaped pile 11, that is, the web 14. .

3 illustrates a case where the bending holding member 15 is formed of a single strip-shaped plate material, the bending holding member is not illustrated, but may be formed of two or three strip-shaped plate materials. When the bending holding member is made of two strip-shaped plates, the two strip-shaped plates are attached symmetrically to the flange 12 around the web 14 of the H-shaped pile 11. When the bend-holding member is made of three strip-shaped plates, one strip-shaped plate is installed on the flange 12 at a position coinciding with the web 14 of the H-shaped pile 11, and the other two strip-shaped plates are Is attached to be symmetric to the flange 12 around the web 14 of the H-shaped pile (11).

As another example, the bending holding member 15 may be installed to be supported by a plurality of reinforcing pieces 17 as shown in FIG. 4.

4 is a perspective view showing a thumb pile for mudguard according to another embodiment of the present invention.

Referring to FIG. 4, a plurality of reinforcing pieces 17 are installed on the flanges 12 of the H-shaped pile 11 on both sides of the bending holding member 15. The plurality of reinforcing pieces 17 support the bending holding member 15 to be firmly fixed vertically to the flange 12 of the H-shaped pile 11. Each of the plurality of reinforcing pieces 17 is formed to have a lower height than the bending holding member 15. It is preferable that the height of the plurality of reinforcing pieces 17 be as low as possible. When the height of the reinforcing piece 17 is lowered, when inserting the thumb pile 10 'for the retaining hole into the perforation hole and filling the sand, the sand can move smoothly down. In addition, at least one through hole 18 may be formed in the reinforcing piece 17. When the through hole 18 is formed in the reinforcing piece 17, when inserting the thumb pile 10 'for the earth retaining hole into the perforation hole and filling the sand, the sand passes through the through hole 18 of the reinforcing piece 17 Can move down.

In the above, the case where the bending holding member 15 is formed of a strip-shaped plate material has been described, but the bending holding member 15 may be formed in various shapes as long as the H-shaped pile 11 can maintain bending.

5 is a perspective view showing a thumb pile for mudguard according to another embodiment of the present invention.

Referring to FIG. 5, the thumb pile 40 for retaining soil according to an embodiment of the present invention may include an H-shaped pile 41 and a bending holding member 45.

The H-shaped pile 41 is bent at a constant curvature and may include a straight portion and a bent portion. The H-shaped pile 41 is the same as the H-shaped pile 11 of the thumb pile 10 for retaining soil according to the above-described embodiment, so a detailed description thereof will be omitted.

The bending holding member 45 is installed in the H-shaped pile 41 so that the H-shaped pile 41 is kept in a bent state. To this end, the bending holding member 45 has a length corresponding to the length of the H-shaped pile 41, and is attached to the bent surface of the H-shaped pile 41, that is, attached to the flange 42, the H-shaped pile 41 ) Is formed to maintain a bent state.

In the present embodiment, the bending holding member 45 may be formed of a cross (+) shaped metal piece. At this time, the cross-shaped bending holding member 45, the vertical plate 46 is perpendicular to the flange 42 of the H-shaped pile 41, the horizontal plate 47 is installed parallel to the flange 42. The horizontal plate 47 may be formed to have a width narrower than the width of the flange 42 of the H-shaped pile 41. The vertical plate 46 is attached to a central portion of the flange 42, that is, a position corresponding to the web 44 of the H-shaped pile 41. At this time, the cross-shaped metal piece 45 may be formed of an iron plate and attached to the H-shaped pile 41 by welding.

6 is a perspective view showing a thumb pile for mudguard according to another embodiment of the present invention.

Referring to FIG. 6, the thumb pile 50 for retaining soil according to an embodiment of the present invention may include an H-shaped pile 51 and a bending holding member 55.

The H-shaped pile 51 is bent at a constant curvature and may include a straight portion and a bent portion. The H-type file 51 is the same as the H-type file 11 of the trowel retaining thumb pile 10 according to the above-described embodiment, so a detailed description thereof will be omitted.

The bending holding member 55 is installed in the H-shaped pile 51 so that the H-shaped pile 51 is kept in a bent state. To this end, the bending holding member 55 has a length corresponding to the length of the H-shaped pile 51, and is attached to the bent surface of the H-shaped pile 51, that is, attached to the flange 52, the H-shaped pile 51 ) Is formed to maintain a bent state.

In the present embodiment, the bending holding member 55 may be formed of a T-shaped metal piece. At this time, the T-shaped bending holding member 55, the vertical plate 56 is perpendicular to the flange 52 of the H-shaped pile 51, the horizontal plate 57 is installed parallel to the flange 52. The horizontal plate 57 may be formed to have the same width as the flange 52 of the H-shaped pile 51. The vertical plate 56 is attached to a central portion of the flange 52, that is, a position corresponding to the web 54 of the H-shaped pile 51. At this time, the T-shaped metal piece 55 may be formed of an iron plate and attached to the H-shaped pile 51 by welding.

The horizontal plate 57 of the bending holding member 55 may be installed at a predetermined distance from the flange 52 of the H-shaped pile 51 so that the earth plate 20 (see FIG. 1) can be inserted. In this case, the space between the flange 52 of the H-shaped pile 51 and the bending holding member 55 can be used to install the earth plate 20. When the earth plate 20 is installed between the H-shaped pile 11 and the bend holding member 55, the thumb pile 50 for earthing can be installed in two ways.

First, as shown in Figure 7a, the bend retaining member 55 may be installed with a thumb pile 50 for the soil to face the ground (3). In this case, the H-shaped pile 51 is exposed to the excavated space. The earth plate 20 is installed in a space between the bending retaining member 55 of the two adjacent thumb pads 50 and the flange 52 of the H-shaped pile 51.

Secondly, as shown in FIG. 7B, the thumb pile 50 for earthing is installed so that the bending holding member 55 is exposed to the excavated space. In this case, since the H-shaped pile 51 is installed to face the ground 3, it is not exposed to the excavated space. The earth plate 20 is installed in a space between the adjacent retaining member 55 of the two retaining thumb piles 50 and the flange 53 of the H-shaped pile 51.

As a modified example of the T-shaped bending holding member 55 shown in FIG. 6, the bending holding member 55 'may be formed in a narrow T-shape. That is, as shown in FIG. 8, the width of the horizontal plate 57 ′ of the bending holding member 55 ′ parallel to the flange 52 of the H-shaped pile 51 is formed to be smaller than the width of the flange 52. can do.

As another example, as a modification of the cross-shaped bending holding member 45 shown in FIG. 5, the bending-holding member may be formed in a cross shape having a wide horizontal plate. That is, as shown in Fig. 9, the width of the horizontal plate 47 'of the bending holding member 45' parallel to the flange 42 of the H-shaped pile 41 is substantially equal to the width of the flange 42. Can form.

Referring back to FIG. 1, the earth plate 20 is installed between two adjacent thumb pads 10 for retaining soil. Specifically, the earth plate 20 is inserted between the flanges 12 and 13 of the H-shaped pile 11 of the two adjacent thumb pads 10 to prevent the rear soil 3 from flowing out. At this time, the earth plate 20 is installed to contact the flange 13 exposed to the outside of the H-shaped pile (11). As the earth plate 20, a plate-shaped steel plate can be used.

Since the H-shaped pile 11 is bent, when the steel plate 20 is inserted between the flanges 12 and 13 of the H-shaped pile 11, there is a gap between the steel plate 20 and the flange 13 Can exist. A water-expandable index material (not shown) may be provided between the flange 13 and the steel plate 20 to prevent water such as groundwater from leaking through the gap.

The water-expandable index material expands in volume by water, such as groundwater, to fill the gap between the flange 13 of the H-type pile 11 and the steel plate 20. The water-expandable index material filled in the gap between the flange 13 of the H-type pile 11 and the steel plate 20 is hardened to bind the H-type pile 11 and the steel plate 20 while being hardened, and at the same time, the H-type pile The gap between the (11) and the steel plate 20 can be filled to improve the order function.

The water-expandable index material can expand in volume by approximately 4 to 15 times due to reaction upon contact with water. The water-expandable index material may be solid or liquid, and as an example, a bentonite composition or a water-expandable rubber composition may be used.

In particular, the bentonite composition may use natural bentonite alone, or a mixture of 100 parts by weight of bentonite, 1 to 50 parts by weight of polyacrylic acid, and 1 to 50 parts by weight of carboxymethylcellulose. The polyacrylic acid and carboxymethylcellulose have the effect of improving the hydration swelling property of bentonite to seawater containing clay or salt, so that it is suitable even when used in the structure of a water barrier wall for building a marine structure.

A receiving groove 21 in which the above-described water-expandable index material is accommodated may be formed on one surface of the steel plate 20, that is, on the surface facing the flange 13 of the H-shaped pile 11. The water-expandable water-receiving material accommodated in the receiving groove 21 is expanded and hardened to fill the space between the steel plate 20 and the web 14 and the flange 13 of the H-shaped pile 11, and at the same time exerts an order function. The steel plate 20 is prevented from being separated from the pile 11.

The thumb pile 10 for earth retaining according to an embodiment of the present invention may determine the length of the H-shaped pile 11 and its bending degree according to the depth of excavation. However, for reuse of the thumb cap 10 for retaining, the thumb pile 10 for retaining can be standardized according to the depth of excavation.

When standardizing the thumb pile 10 for mudguard, as shown in FIG. 10, an extension file 70 may be installed at the bottom of the thumb pile 10 for mudguard.

At this time, the thumb pile 10 for mudguards can be manufactured by standardizing for each length. For example, the thumb pile 10 for earthing can be produced at 1M intervals in a length range of 4M to 10M. If one standardized thumb pad 10 cannot be used to support the earth pressure of the excavated part, the extended pile 70 is coupled to the lower end of the standardized thumb pad 10 to prevent the earth pressure. The length of 10) can be extended.

The extension pile 70 is formed of a straight shape that is not bent and deformed with the same H-shaped pile as the H-shaped pile 11 of the thumb pile 10 for retaining. The extension pile 70 is connected by a pair of connecting plates 80 to the bottom of the H-type pile 11 of the thumb pile 10 for earthing.

The connecting plate 80 is formed of a rectangular steel plate, and is formed to be installed on the web 14 of the H-shaped pile 11. A plurality of bolt holes are formed in the connecting plate 80, and correspond to a plurality of bolt holes of the connecting plate 80 at the lower end of the H-shaped pile 11 of the thumb pile 10 and the upper end of the extension pile 70. A plurality of through-holes are provided. Therefore, the pair of connecting plates 80 are placed in the connection portion of the H-shaped file 11 and the extension file 70, and a plurality of bolts 81 are inserted into a plurality of bolt holes of the connecting plate 80, When fastened with a plurality of nuts, it is possible to connect the thumb pile 10 and the extension pile 70 for earthing.

In this case, the thumb pile 10 and the extension pile 70 may be connected using a bolt as shown in the drawings, but it is not limited thereto, and other methods such as welding may be used.

In addition, although the drawing does not show a member such as a bending holding member 15 in the extension pile 70, in some cases, a steel material connected to the bending holding member of the thumb pile is added by a method such as bolt or welding. It may be provided with.

Hereinafter, with reference to Figures 11a to 11f will be described in detail with respect to the thumb pile mud construction method according to an embodiment of the present invention.

11A to 11F are views for explaining a method for constructing a thumb pile according to an embodiment of the present invention.

In order to construct the thumb pile mud construction method, first, the thumb pile 10 for mud according to an embodiment of the present invention is prepared.

To manufacture the thumb pile 10 for retaining, first, as shown in FIG. 11A, a commercially available or separately manufactured H-type file 11 is prepared.

Thereafter, as shown in FIG. 11B, the H-shaped file 11 is bent at a constant curvature to apply prestress. Specifically, one end 11a of the H-shaped pile 11 embedded in the ground maintains a straight state perpendicular to the ground, and the other end 11b of the H-shaped pile 11 protruding from the ground is the one end The pre-stress is applied to the H-shaped file 11 by bending the H-shaped file 11 to bend at a constant curvature with respect to (11a). At this time, the bending amount of the H-type pile 11 can be appropriately set according to the earth pressure to be supported by the thumb pile 10 for retaining the soil. The bending processing of the H-shaped pile 11 can be performed by roller processing in a firing plant. In addition, it is also possible to manufacture and use a bent H file from the beginning without additional bending.

Next, as shown in FIG. 11C, the bending holding member 15 is attached to one surface (bending surface) of the H-shaped pile 11 that is bent, that is, to the inner flange 12 of the H-shaped pile 11. . The bending holding member 15 serves to support the bending of the H-shaped pile 11 that is bent to be maintained, and may be formed to have a length corresponding to the length of the H-shaped pile 11. For example, a strip-shaped metal piece 15 having a length corresponding to the length of the H-shaped pile 11 can be attached to the center of the inner flange 12 of the H-shaped pile 11.

When the thumb pile 10 for earthing is completed in this way, a plurality of perforation holes 5 are formed by puncturing at a predetermined distance in the ground 3 at the excavation site (see FIG. 11D). The perforation hole 5 is formed so that the thumb pile 10 for earth retaining can be inserted.

Subsequently, as shown in FIG. 11E, the thumb pile 10 for retaining the soil is bent into the perforation hole 5 at a certain curvature and the bending holding member 15 is attached.

Next, the sand is filled around the thumb pile 10 for the retaining hole inserted in the perforation hole 5.

Lastly, the front part of the thumb pile 10 for earth retaining is excavated, and the steel plate 20 is installed. The steel plate is installed by inserting it into the flanges of two adjacent piles for retaining thumb. At this time, since the H-shaped pile 11 of the thumb pile 10 for earth retaining is bent, a gap exists between the flange 13 of the H-shaped pile 11 and the steel plate 20. A water-expandable index material may be provided between the flange 13 and the steel plate 20 to prevent water such as groundwater from flowing out through the gap.

The water-expandable index material expands in volume by water, such as groundwater, to fill the gap between the flange 13 of the H-type pile 11 and the steel plate 20. As described above, the water-expandable index material filled in the gap between the flange 13 of the H-type pile 11 and the steel plate bonds the H-type pile 11 and the steel plate 20 while being hardened, and at the same time, the H-type pile 11 Filling the gap between the and the steel plate 20 can improve the order function.

The thumb pile 10 for retaining soil according to an embodiment of the present invention having the above-described structure has an advantage of being able to stand alone without using a strut or a belt because prestress is applied. On the other hand, there is an advantage that the number of uses can be reduced even when a strut or a belt is required because the earth pressure is very large.

On the other hand, by not using a strut, when the displacement is largely generated in the thumb pile 10 in a deep section of the trench, the ground may be cracked due to the relaxation of the ground.

In addition, the thumb pile 10 for retaining the soil according to an embodiment of the present invention has a bending holding member 15 that maintains the bending of the H-shaped pile 11, and is embedded in the soil of the ground 3, during excavation construction. There is an advantage that the bending holding member 15 is not damaged.

In addition, the thumb pile 10 for retaining according to an embodiment of the present invention is a H-type pile 11 because prestress is applied by bending of the H-type pile 11 and a bending holding member 15 that maintains the bending. ) Has the advantage of being able to apply a large prestress with less deformation.

The present disclosure has been described above by way of example. The terms used herein are for illustrative purposes and should not be understood in a limiting sense. Various modifications and variations of the present disclosure are possible according to the above. Accordingly, the present disclosure may be freely implemented within the scope of the claims unless otherwise stated.

One; Mudguard structure 3; Ground
10,40,50; Thumb piles for retaining walls 11,41,51; H type file
12,13,42,43,52,53; Flanges 14,44,54; Web
15,45,55; Bending holding member 20; Earth plate (steel plate)
30; Water-expandable index material 46,56; Vertical
47,57; Level plate 70; Extension file
74; Web 80; Connecting plate

Claims (6)

It includes a web and a pair of flanges installed parallel to both ends of the web, one end of which is embedded in the ground maintains a straight state perpendicular to the ground, and the other end protruding from the ground has a constant curvature with respect to the one end. H-type pile to which prestress is applied by bending the furnace; And
It includes a bend holding member having a length corresponding to the length of the H-shaped pile, is attached to the inwardly bent flange of the pair of flanges of the H-shaped pile to form the H-shaped pile to maintain the bending;
The H-shaped pile is bent using a roller before the bending holding member is attached,
The bending holding member is formed of a strip-shaped plate material, and is vertically attached to the inwardly bent flange of the H-shaped pile,
Both sides of the bending holding member are supported by a plurality of reinforcing pieces installed on the inwardly curved flange of the H-shaped pile,
The bend retaining member and the plurality of reinforcing pieces are attached to the H-type pile is soiled thumb pile characterized in that it is buried in the ground in a bent state at a constant curvature.
delete delete According to claim 1,
A straight extension file installed at the bottom of the H-shaped file; And
A thumb pile for earthing, characterized in that it further comprises; a connecting plate connecting the H-type file and the extension file. According to claim 1,
The bending retaining member has a cross-section of any one of a cross (+) shape and a T-shape, the thumb pile for retaining soil. A web and a pair of flanges installed parallel to both ends of the web and one end of the H-shaped pile embedded in the ground maintains a straight line perpendicular to the ground, and the other end of the H-shaped pile protruding from the ground The step of applying a prestress to the H-shaped pile by bending the H-shaped file using a roller so as to bend at a constant curvature with respect to the one end;
A thumb stake for clogging is manufactured by attaching a bending holding member having a length corresponding to the length of the H-shaped pile to a flange bent inward among the pair of flanges of the H-shaped pile to maintain the bending of the H-shaped pile To do;
Forming a perforation hole by drilling at regular intervals in the ground;
A step of bending the thumb pile for the earth retaining film to which the perforation hole is bent at a predetermined curvature and the bending holding member is attached;
Filling sand around the thumb pile for the mud wall inserted into the perforation hole; And
Includes; excavating the front portion of the thumb pile for the earth retaining, and installing a steel plate; includes,
The bending holding member is formed of a strip-shaped plate material, is vertically attached to the inwardly bent flange of the H-shaped pile, and both sides of the bending holding member are installed on the inwardly bent flange of the H-shaped pile Thumb pile earthing method, characterized in that supported by the reinforcing piece.

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