KR20170052317A

KR20170052317A - Reinforced earth-anchor structure for weakground

Info

Publication number: KR20170052317A
Application number: KR1020150154622A
Authority: KR
Inventors: 박광호
Original assignee: 박광호
Priority date: 2015-11-04
Filing date: 2015-11-04
Publication date: 2017-05-12
Also published as: KR101861684B1

Abstract

According to the present invention, it is possible to improve the supporting force by using the inversion of the inner lower body, to install the earth anchor on the thumb pile, to omit the installation of the band for installing the earth anchor, and by using the support structure of the earth anchor, To an earth anchor structure for a soft ground.
The present invention relates to an earth anchor structure which is installed in a perforation of a ground supported by a earth retaining wall and supports the earth retaining wall body. The earth anchor structure includes a ground anchor structure having one end exposed to the outside of the earth retaining wall, Line member; A first inner lower body fixed to the other end of the tension member and inserted in the perforation; And a head block member protruding outside the earth retaining wall to fix one end of the tension line member to the earth retaining wall in a state in which the tension line member is pulled.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an anchor structure for reinforced soft ground,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an earth anchor structure for a soft ground, and more particularly, to an earth anchor structure for an earth ground for an earth anchor, And an earth anchor structure for a soft ground which can improve the supporting force of the earth retaining wall by using the support structure of the earth anchor.

As the scale of the recent construction increases, the depth of excavation deepens to the ground and the depth of excavation deepens to the underground. Especially, these phenomena are occurring in construction sites in the vicinity of downtown area. As the construction of the building becomes higher and the depth of the underground part becomes deeper, the earth pressure and the water pressure acting on the wall of the earth wall, which is the wall of the earth retaining walls, increase. In this situation, the conventional retention method applied at the depth of 15 ~ 20m underground would not be able to resist the earth pressure and water pressure generated on the bottom of the excavation part if the depth of excavation is deepened, .

In order to solve this problem, it is possible to reduce the earth pressure and water pressure acting on the wall by using the method of improving the ground on the back wall of the earth wall, which is the wall of the earth retaining wall. However, it increases the cost of the huge construction, and the grouting method It is difficult to precisely improve the designed depth and position when the drilling depth is 20 m or more.

For this reason, a diaphragm wall method, which has a very high stiffness of the wall and can sufficiently satisfy the order effect, is widely adopted in the urban center construction. However, this method is also applied to the stress acting on the back surface of the earth retaining wall, (Earth Anchor) or a separate supporting method.

Earth anchor method is most widely used as a stabilization method to suppress slope collapse and sliding. Here, the term "earth anchor" refers to an anchor structure that is provided with a tensile material (anchor structure) to form a composite reinforcing ground while maximizing the strength of the ground, thereby increasing the shear and tensile strength of the ground to suppress displacement, to be.

In other words, the basic design concept of the earth anchor method is that the aggregate of the area reinforced by the structure of the earth anchor acts like an integral retaining wall so that it can maintain stability for any slope that the reinforcing earth wall can assume will be. These earth anchors have recently been widely applied to reinforced slopes of roads, reinforced rocks of railways, dams, tunnel shafts, and the like.

However, these earth anchors are designed to incorporate anchors designed to be useful in the rocks into rock masses. The rock structures of various slopes differ from those of the main rocks. Rock masses with many joints, rock masses with many cavities, It is difficult to reinforce the rock slope by using only the ground anchor using the existing wire because many slope structures such as the rocks separated from the parent rocks are unstable due to the development of the discontinuity due to the influence of the slope.

The ground anchor structure using conventional wires is constructed by inserting an earth anchor connected to a plurality of wires in the perforation hole, pulling the earth anchor to the ground or rock, and fixing the wire to the ground plate. However, As time passes, an earth anchor fixed to the perforation hole is pushed out of the ground, causing the pulling force of the wire to disappear, causing sliding on the slope of the ground.

Korean Patent Laid-Open No. 10-2009-0131807 (earth anchor for slope reinforcement and earth anchor construction method using same, published on Dec. 30, 2009, hereinafter referred to as "prior art") has been developed.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground anchor for reinforcing a slope, which is installed to reinforce the stability of the ground due to seepage and soil loss, and is characterized in that the wire anchor of the earth anchor is divided into a first anchor and a second anchor The anchor is used to support the wire to have a strong supporting force to improve the tensile force and to maintain a strong tensile force even after a long period of time. The first and second anchors are supported on the upper part of the casing body The head in the casing body pushes the bottom of the support protrusion of the blade to spread the blade to be hooked on the inner wall of the perforation hole to support the wire, To strengthen the binding tension of the ground to protect the slope A surface reinforcement for earth anchor and to relate the earth anchor construction method using the same.

In this conventional technique, the first anchor and the second anchor are provided to support the wire so that the wire has a strong supporting force, thereby improving the tensile force and maintaining a strong tensile force even after a long period of time.

However, in order to exhibit such an effect, the wire has to be pulled so that the wing body of the blade has to be widened outward with the hinge part as a center, and the configuration of the first anchor and the second anchor is complicated.

Also, in the prior art, although the supporting force is improved by the blade, since the anchor itself is arranged coaxially with the direction of the tensile force of the wire, only the supporting force of the anchor is supported by the mortar, There was a problem.

It is an object of the present invention to provide an earth anchor structure for an enhanced soft ground which improves the supporting force by using the inversion of the inner bottom body.

Another object of the present invention is to provide an earth anchor structure for a soft ground, which is provided with a ground anchor on a thumb pile so that the installation of a strap for installing an earth anchor can be omitted.

It is still another object of the present invention to provide an earth anchor structure for a soft ground which is capable of improving the supporting force of the earth retaining wall by using the support structure of the earth anchor.

According to an aspect of the present invention, there is provided an earth anchor structure for a soft ground, the earth anchor structure comprising: an earth anchor structure installed in a perforation of a ground supported by the earth retaining wall to support the earth retaining wall; 1. An earth anchor structure, comprising: a tensile wire member having one end exposed to the outside of the earth retaining wall and the other end invertedly inserted into the perforation; A first inner lower body fixed to the other end of the tension member and inserted in the perforation; And a head block member protruding outside the earth retaining wall to fix one end of the tension line member to the earth retaining wall in a state in which the tension line member is pulled.

At this time, a binding member is attached to the other end of the tension member to bind the other end of the tension member so that the tension member remains inverted.

It is preferable that the binding member is made of a material having a strength that can be broken when a tensile force is applied to the tension member, or a material that is detached from the tension member.

And a second inner bottom body provided at a portion where the tensile wire member is not inverted may be further mounted on the other end of the tensile wire member.

The head block member includes a fixed panel fixed on two adjacent thumb piles constituting the earth retaining wall and having a through hole through which the tensile wire member can pass, And a cap to be fixed to the fixed panel.

Or the head block member includes a fixed panel having a through hole corresponding to a through hole formed in a thumb pile constituting the earth retaining wall in accordance with an inclination angle between the tension member and the first inner bottom body, And a cap and a cap for applying a tensile force to the tension member exposed through the through hole and fixing the tension member to the fixed panel.

At this time, the fixing panel may further include a coupling member extending around the through hole to be inserted into the through hole.

The thumb pile may be provided with a communication pipe connecting two through holes formed in the thumb pile in accordance with the inclination angle.

According to the reinforced ground anchor structure for soft ground according to the present invention, when the inner bottom body is embedded in the ground with the inverted lower body and tensile force is applied to the tensile wire member, the inner bottom body is rotated in the reverse direction to press the perforation, There is an effect that a strengthened bearing force can be exhibited.

Further, according to the present invention, a structure in which an earth anchor can be installed on a thumb pile can be omitted, and a wale installed on a thumb pile can be omitted for installation of an earth anchor, so that construction cost and time can be remarkably shortened, It has the advantage of expanding workspace for constructing underground structures after wall construction.

1 is a sectional view of an earth anchor structure according to the present invention,
2 is a sectional view showing the operation of the earth anchor structure according to the present invention,
3 is a sectional view showing a modified example of the earth anchor structure according to the present invention,
FIG. 4 is a sectional view showing the operation of the earth anchor structure according to the modification shown in FIG. 3,
5 is a perspective view showing a configuration of a head block member according to the first embodiment of the present invention,
Fig. 6 is an exploded perspective view of the head block member shown in Fig. 5,
7 is a perspective view showing a form in which a head block member according to the present invention is installed on an adjacent thumb pile,
8 is an exploded perspective view of the head block member shown in Fig. 7,
9 is a perspective view showing a configuration of a head block member according to a second embodiment of the present invention,
Fig. 10 is an exploded perspective view of the head block member shown in Fig. 8,
11 is a perspective view showing an embodiment in which the head block member according to the present invention is applied to the CIP method,
12 is an exploded perspective view of the head block member shown in Fig.

Hereinafter, an earth anchor structure for a reinforced soft ground according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a sectional view of an earth anchor structure according to the present invention, and FIG. 2 is a sectional view showing the operation of an earth anchor structure according to the present invention.

As shown in the figure, the earth anchor structure according to the present invention is installed in a perforation 210 of a ground supported by an earth retaining wall to support the earth retaining wall body 200, and is mainly composed of a tension wire member 110, And includes a lower body 120 and a head block member 130.

One end of the tensile wire member 110 is exposed to the outside of the earth retaining wall body 200 and the other end is bent to be inverted to be inserted into the perforation 210. At this time, a binding member 140 for binding the tension member 110 is mounted on the other end of the tension member 110 in order to keep the tension member 110 in an inverted state. Further, it is preferable that the binding member 140 has a strength that can be broken when tensile force is applied to the tensile wire member 110, or can be separated from the tensile wire member 110. Examples of such a binding member 140 include a tape and an elastic band.

The first inner lower body 120 is fixed to the other end of the tension member 110 and inserted in the perforation 210. At this time, since the other end of the tension member 110 is in an inverted state, the first inner lower body 120 is inserted into the perforation 210 in an inverted state as shown in FIG.

Further, in this embodiment, as in the conventional earth anchor structure, the second inner bottom body 150 can be further attached to the portion where the tensile wire member 110 is not inverted.

3, the earth anchor structure according to the present invention may have only one first inner lower body 120, but it is also possible to provide the second inner lower body 150 with two first inner lower bodies 120 through the tensile wire members 110, The inner bottom bodies 120a and 120b may be connected.

The head block member 130 projects to the outside of the earth retaining wall member 200 and fixes one end of the tension line member 110 to the earth retaining wall member 200 in a state in which the tension line member 110 is pulled.

The head block member 130 has a structure in which the earth anchor can be installed directly on the thumb pile 220, thereby eliminating the wedge provided in the thumb pile 220 for the installation of the earth anchor.

5 and 6, the head block member 130 is disposed on two adjoining thumb piles 220 constituting the earth retaining wall body 200 A fixing panel 131 having a through hole 132 through which the tension member 110 is passed and a tensile force is applied to the tension member 110 exposed through the through hole 132, And a cap 136 which fixes the cap 135 to the cap 131. At this time, since the tensile wire member 110 passes between the two thumb piles 220, a through hole through which the tensile wire member 110 can pass is formed in the current plate 230 installed between the two thumb piles 220 .

At this time, the pressure plate 135 and the cap 136 are formed to be inclined so that the tension line member 110 can be fastened in the vertical direction with respect to the upper end of the cap.

Further, the adjacent thumb piles 220 may be installed close to each other as shown in Figs. 7 and 8. Fig. A through hole 221 is formed in the thumb pile 220 in correspondence with the through hole 132 of the fixed panel 131 since the tensile wire member can not pass through between the two thumb piles. The through holes 221 are formed in the front portion and the back portion of the thumb pile, respectively, since the through holes 221 are formed to match the inclination angle between the tension member 110 and the first inner lower body 120.

When the through hole 221 is formed, the fixing panel 131 may further include a coupling member 133 extending around the through hole to be inserted into the through hole 221 formed in the front face portion . The coupling member 133 joins the fixed panel 131 to the thumb pile before the fixing panel 131 is coupled to the thumb pile 220 by welding or bolting.

The communicating pipe 137 may be installed in the through hole 221 to block the inflow of soil or groundwater around the earth retaining wall to prevent contamination or corrosion of the tension line member 110 .

In addition, in the first embodiment in which the head block member is provided on the two thumb piles, a restraining plate 223 for binding the two thumb piles can be mounted. The restraint plate 223 has bent one end and the other end, and two thumb pawls are inserted through the bent portion. The restraint plate 223 may also be fixed to the thumb pile by welding or bolting to the thumb pile.

Or the restraint plate 223 may be disposed around the thumb pile and fixed to the thumb pile.

9 and 10, the head block member 130 is disposed between the tension member 110 and the first inner lower body 120, A fixed panel 131 fixed to the thumb pile 220 with a through hole 132 corresponding to the through hole 221 formed in the thumb pile 220 constituting the earth retaining wall body 200 in accordance with the inclination angle, And a cap and a cap 135 for applying a tensile force to the tension member 110 exposed through the through hole 132 and fixing the tension member 130 to the fixed panel 131.

In this second embodiment, as an example in which the head block member 130 is mounted on one thumb pile 220, two thumb piles 220, And the through hole 221 should be formed in accordance with the inclination angle at which the tensile wire member 110 is installed.

To this end, the thumb pile in the second embodiment is preferably a section steel having a "V" -shaped section rather than an H-section as shown.

Since only one thumb pile is used in the second embodiment, there is no need to mount a restraining plate, and the other configurations are substantially the same as those of the first embodiment described above.

Also, in the case where the thumb pile 220 is an H-shaped steel 240 inserted between a plurality of files in the CIP method, the head block member 130 is mounted on the H-shaped steel pipe 240. In this case, the H-shaped steel pipe 240 is not disposed such that one side of the flange is exposed when the earth retaining wall 200 is manufactured by the CIP method, and a web surface is formed as shown in FIGS. 11 and 12 And a through hole 241 is formed in the web.

A pair of L-shaped steel pipes 250 are mounted on a flange facing the H-shaped steel pipe 240 and a head block member 130 is mounted on the front surface of the L shaped steel pipe 250. At this time, both ends of the fixing panel 131 of the head block member 130 are exposed to the sides of the pair of L-shaped steel pipes 250, and a supporting panel 139 is provided in a space between the exposed fixing panel 131 and the files. The tensile force on the earth anchor is shared by the earth retaining walls 200 while the files between the H beams 240 are integrated.

The upper end of the support panel 139 is bent so that the bent upper end thereof is supported at the upper end of the fixing panel 131 and is temporarily fixed to the supporting panel 139 and the fixing panel 139 131 may be welded or bolted to each other.

Next, an installation method and an operation of the reinforced earth anchor structure for soft ground according to the present invention will be described.

One end of the tensile wire member 110 according to the present invention is exposed to the outside of the earth retaining wall member 200 and is mounted on the thumb pile 220 by the head block member 130 and the other end is bent in a reverse direction, . At this time, the first inner lower body 120 is mounted on the inverted tension member 110, and the second inner lower body 150 is further mounted on the non-inverted portion of the tension member 110.

The tension member 140 is attached to the tension member 110 so that the tension member 110 can be maintained in an inverted state.

The end of the tensile wire member 110 is exposed through the through hole of the head block member 130 fixed between adjacent two thumb piles 220 to fill grout in the perforation 210 to form a fixed end do.

Thereafter, the tension member 110 is tensioned so as to be tensioned, and the cap 136 is covered and fixed to the pressure plate 135.

At this time, when the tension member 110 is pulled, as shown in FIG. 2, the tension member 130 is pulled out so that the first inner member 120 rotates in the reverse direction, The inverted portion of the tension member 110 may be broken due to a force applied to the binding member 140 binding the inverted portion due to the property of being stretched.

The length of the first inner lower body 120 is relatively larger than the diameter of the perforations 210, so that the first inner lower body 120 is subjected to resistance by the perforated wall while rotating in the reverse direction. In addition, since the first and second inner lower bodies 120 and 150 are embedded in the filled grouting to form a fixed end, the load on the fixed ends of the first and second inner lower bodies 120 and 150, The resistance against the inversion of the lower body 120 is added, so that the earth pressure that the earth anchor according to the present invention can withstand significantly increases.

4, when the two first inner bottom bodies 120a and 120b are mounted, when the tension member 110 is pulled, the first inner bottom bodies 120a and 120b rotate and are reversed do. At this time, since the first inner bottom bodies 120a and 120b are rotated in the substantially opposite directions, resistance due to the perforated wall is added to the resistance against the reversal of the first inner bottom bodies 120a and 120b, Thereby supporting the earth retaining wall 200.

The pressure plate 135 and the cap 136 holding the tension line member 110 are fixed to the fixed panel 131 of the head block member 130. The fixed panel 131 is formed of a thumb pile or two It is not necessary to provide a separate wedge on the thumb pile 220 in order to install the head block member 130.

However, in order to increase the strength of the retaining wall due to the coupling between the thumb piles, a cap wedge (not shown) may be placed on the upper part of the thumb pile to interconnect the thumb piles.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the invention as defined by the appended claims. It is obvious that you can do it.

100: Earth anchor structure
110: tensile wire member 120: first inner lower body
130: head block member 131: fixed panel
132: through hole 133: coupling member
135: pressure plate 136: cap
137: communicating tube 139: support panel
140: binding member 150: second inner lower body
200:
210: Perforation 220: Thumb pile 221: Through hole
230: earth plate 240: H-shaped steel 241: through hole
250: L section steel

Claims

An earth anchor structure installed in a perforation (210) of a ground supported by an earth retaining wall (200) to support the earth retaining wall (200)
A tensile wire member 110 having one end exposed to the outside of the earth retaining wall 200 and the other end bent inward to be inserted into the perforation 210;
A first inner lower body (120) fixed to the other end of the tension member (110) and inserted into the perforation (210); And
A head block member 130 protruding outside the earth retaining wall body 200 and fixing one end of the tension line member 110 to the earth retaining wall body 200 in a state of pulling the tension line member 110; And an earth anchor structure for reinforced soft ground.

The method according to claim 1,
Wherein a binding member (140) for binding the other end of the tension member (110) is mounted on the other end of the tension member (110) so that the tension member (110) Earth anchor structure for soft ground.

3. The method of claim 2,
Wherein the binding member (140) is made of a material capable of being broken when the tension member (110) is subjected to tensile force or being detached from the tension member (110) Earth anchor structure.

The method of claim 3,
Wherein the tensile wire member (110) is further provided with a second inner lower body (150) at a portion where the tensile wire member (110) is not inverted.

The method according to claim 1,
The head block member 130 is fixed to adjacent two thumb piles 220 constituting the earth retaining wall body 200 and has a through hole 132 through which the tension wire member 110 can pass And a cap 136 which is fixed to the fixed panel 131 by applying a tensile force to the tensile wire member 110 exposed through the through hole. Earth anchor structure for ground.

The method according to claim 1,
The head block member 130 is fixed to the through hole 221 formed in the thumb pile 220 constituting the earth retaining wall body 200 in accordance with the inclination angle between the tension member 110 and the first inner lower body 120 A fixed panel 131 provided with a corresponding through hole 132 and installed on the thumb pile 220 and a tensile force applied to the tensile wire member 110 exposed through the through hole 132, And the cap (136). The earth anchor structure of claim 1,

The method according to claim 6,
Wherein the fixed panel (131) further comprises a coupling member (133) extending around the through hole to be inserted into the through hole (221).