KR102272494B1 - Slope reinforcement structure using support and tension and Its Construction method - Google Patents

Abstract

The present invention relates to a slope reinforcement structure using bearing capacity and tensile strength, and a construction method thereof. An objective of the present invention is to effectively stabilize a slope. According to the present invention, the slope reinforcement structure using bearing capacity and tensile strength comprises a plurality of support piles (20), a composite wall (10), a tension material (30), and a manual earth rock unit.

Description

Slope reinforcement structure using support and tension and Its Construction method

The present invention relates to a slope reinforcement structure, and more particularly, a slope reinforcement structure using a retaining force and tension, which minimizes cutting by using a retaining facility, supports the retaining facility, enables safe construction, and has excellent structural rigidity after construction, and a construction method thereof is about

This section provides background information related to the subject matter of the present application and is not necessarily prior art.

Retaining walls and underground structures are walls that support the soil, and are installed under the slope for the purpose of securing the limited land as much as possible. Retaining walls currently being installed include concrete retaining walls installed on cut slopes. A concrete retaining wall is a retaining wall of a structure that resists the lateral earth pressure of a slope by installing an unreinforced or reinforced concrete structure after cutting the natural slope.

These retaining walls are the most common structures that resist earth pressure, and are used for the purpose of optimal use of land due to site restrictions such as roads, railways, rivers, and bridges.

Retaining walls like this require cutting work on the slope, and this cutting work is unreasonable in terms of time and cost and has poor stability. In order to solve this shortcoming, a method using temporary retaining facilities has been proposed. there is a bar

Registered Patent No. 10-1465149 discloses a combined wall retaining wall that is constructed on the entire surface of a fill slope or cut slope to support lateral earth pressure, and is composed of an H-pile, an earth plate and a permanent anchor, and a wale is placed on the head of the permanent anchor. a retaining structure that is formed and is constructed on the entire surface of the fill slope or the cut slope; Foundation concrete to be poured on the lower front of the retaining structure; At least one gravity block manufactured by precast and installed in a laminated manner on the foundation concrete; a hook-type connecting member connecting the wale of the retaining structure and the gravity block in the transverse direction; and backfilling concrete poured into the space between the retaining structure and the gravity block, wherein the retaining structure, the gravity block, and the backfilling concrete are integrated to form a junction-type retaining wall, and an H-shaped steel installed on the head of the anchor The wale is installed in the horizontal direction on the rear surface of the H-pillar and the earth plate, so that the anchor head is supported on the front of the wale, and the hook-type connecting member is formed extending from the wale installed so that the anchor head of the retaining structure is supported. ; and a block hook having one end embedded in each side of the gravity block, the other end protruding in the direction of the retaining structure, and fastened with the anchoring hook, wherein the anchoring hook is hung inside the flange of the H-shaped wale. It is designed to be fixed (longitudinal length (d1)), and it entails unnecessary processes of backfilling concrete, and there are problems such as complicated and difficult work such as drilling for installation of permanent anchors.

Registered Patent No. 10-1465149

The present invention is to solve the problems as described above, and provides a slope reinforcement structure and a construction method thereof using the bearing capacity and tension that can keep the composite wall strong and safe while minimizing the cutting work and simplifying the installation work of the retaining facility. There is a purpose to do that.

The slope reinforcement structure using the bearing and tension forces according to the present invention comprises: a plurality of support piles inserted and installed in the ground of the slope at a predetermined distance from each other and supported by passive earth pressure by the soil layer of the slope; a composite wall made of a combination of a concrete wall part and a retaining facility and constructed at a predetermined distance in front of the support pile; A plurality of sacrificial piles fixed to the support pile and the composite wall to support the composite wall based on the support pile as a support base, wherein the composite wall is inserted into the ground at a predetermined distance between the retaining facilities. , a wale connected while being arranged in the transverse direction between the sacrificial piles, and an earth plate installed between the sacrificial piles, wherein the wall portion is compositely constructed with the sacrificial piles.

The sacrificial pile is characterized in that it includes an inclined wedge and an inclined tension material that is easy to install on a ramp when the sacrificial pile is installed at a different height from the support pile.

The construction method of the slope reinforcement structure using the bearing and tension force according to the present invention comprises: a first step of inserting and installing a plurality of supporting piles in the soil layer of the slope and installing the sacrificial piles in front of the supporting piles; a second step of securing a space in the soil layer between the support pile and the retaining facility, mounting a tension member, and then connecting both sides in the longitudinal direction to the support pile and the sacrificial pile of the retaining facility, respectively; a third step of excavating the front part of the sacrificial pile and installing a wale and earth plate to construct a retaining facility, and constructing a drainage channel and a manual earth pressure part on the soil layer between the support pile and the sacrificial pile; It is characterized in that it includes a fourth step of constructing a wall part of concrete in front of the retaining facility installed in the third step.

According to the slope reinforcement structure using the bearing and tension force according to the present invention and the construction method thereof, the soil is removed in a state protected by the retaining facility while installing the support piles on the soil layer of the slope and installing the retaining facilities in front of the support piles. Because the construction is done by doing this, cutting work is possible without large equipment, or the use time is short even with large equipment, which greatly reduces construction costs and shortens the construction period. It has the effect of preventing the collapse of the retaining facility until completion and protecting the workers safely.

In addition, since the support piles are integrally synthesized through the tension member to secure a large bearing capacity, the slope can be stabilized by the slope reinforcement structure for a long period of time, and there is an effect of preventing the collapse of the slope.

And, by installing the support piles perpendicular to the ground, it is possible to stabilize the slope rather than installing the conventional anchor hole inclined.

In addition, since only the part for the construction of the support pile is cut, and this cutting operation is possible at a low cost and a shorter time compared to the conventional cutting operation, the workability is very excellent.

1 is a side view of the construction state of the slope reinforcement structure using the bearing force and tension force according to the present invention.
Figure 2 is a plan view of the construction state of the slope reinforcement structure using the bearing force and tension force according to the present invention, a plan view of the position for showing the tension material.
Figure 3 is a plan view showing the connection of the sacrificial pile and wale applied to the slope reinforcement structure using the bearing and tension according to the present invention.
Figure 4 is a perspective view showing the connection of the sacrificial pile and wale applied to the slope reinforcement structure using the bearing and tension force according to the present invention.
Figure 5 is a side view showing the connection of the sacrificial pile and the bandage applied to the slope reinforcement structure using the bearing and tension force according to the present invention.
Figure 6 is a plan view showing the installation state of the sacrificial pile and earth plate applied to the slope reinforcement structure using the bearing and tension force according to the present invention.
Figure 7 is a rear perspective view for showing the sacrificial pile, wale and earth plate applied to the slope reinforcement structure using the bearing and tension force according to the present invention.
8 is a perspective view of a portion in which the tension material applied to the slope reinforcement structure using the bearing force and tension force according to the present invention is fixed to the support pile.
Figure 9 is a side view for showing a slot applied to the slope reinforcement structure using the bearing force and tension according to the present invention.
11 to 15 are construction process diagrams of the slope reinforcement structure using the bearing force and tension force according to the present invention.

In the following description of the present invention, if it is determined that a detailed description of a related well-known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the terms described below are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators. Therefore, the definition should be made based on the content throughout this specification.

As shown in Figures 1 and 2, the slope reinforcement structure using the bearing and tension force according to the present invention is a concrete wall portion 11 and retaining facility {steel sacrificial pile 12 and wale 13 and earth plate ( Combination of 15)} is synthesized composite wall 10, support piles 20 installed at the back of the composite wall 10, and tension materials for supporting the composite wall 10 based on the support piles 20 ( 30), and the tension member 30 is connected in a chain while being installed in a zigzag form when viewed from the top, and is installed inclined upward toward the support pile 20 when viewed from the side, and in the description of the slope reinforcement structure, after construction Based on the state, only the configuration of the present invention and the organic coupling relationship of the configurations will be described, and then the construction method will be specifically described.

The composite wall 10 is a structure in which a wall part 11 of concrete and a sacrificial pile 12 of steel are synthesized, and the wall part 11 of concrete uses the characteristics of concrete to withstand the earth pressure transmitted from the slope. and the sacrificial pile 12 is, for example, a ready-made product of the H-beam, and the bottom part is inserted and fixed in the ground while being integrally synthesized with the wall part 11 to secure the bearing capacity.

The wall portion 11 of the concrete is a reinforced concrete structure with a cross-section that is the same to gradually thickening from the top to the bottom, and a structure including a bottom plate portion 11a (horseshoe portion) of a wider cross-section at the bottom, and is preferably cast in-situ. Precast concrete products of the same construction but constructed may also be used.

The sacrificial pile 12 is for securing the bearing capacity of the composite wall 10 and can be divided into a retaining part 12-1 and a fixing part 12-2 that is inserted and fixed in the ground deeper than the wall part 11 in the ground. have.

The sacrificial pile 12 may include a plurality of studs in order to increase the composite force when the wall portion 11 is cast-in-place.

A plurality of sacrificial piles 12 having such a configuration are used that are spaced apart from each other at regular intervals according to the size of the slope reinforcement structure, and at this time, as shown in FIGS. 1 and 3, the neighboring sacrificial piles 12 are wale (13) is connected.

The wale 13 is, for example, only shown as an H-beam in the drawing, and both ends in the longitudinal direction are fixed to the adjacent sacrificial piles 12 and all materials that can be firmly connected are possible. In addition, as a fixing method of the wale 13, for example, as shown in FIGS. 4 and 5, the wale wedge 14 is fixed to the sacrificial pile 12 (welding, etc.), and the wale 13 is attached to the wale wedge 14. A method of fixing (bolting, etc.) is possible.

The wale 13 is inserted into the sacrificial pile 12, that is, it does not protrude in front of the sacrificial pile 12 and does not invade the concrete pouring space of the wall part 11, so the increase in the thickness of the wall part 11 due to the protrusion can be stopped

The wale 13 is installed in one stage or two or more stages depending on the height of the slope reinforcement structure, and the drawing shows two stages as an example.

The wale 13 may also include studs for the same purpose as the sacrificial stake 12 .

By connecting a plurality of sacrificial stakes 12 through the wale 13, at this time, the sacrificial stakes 12 are firmly self-supporting because the bottom is fixed in the ground.

The wale wedge 14 is a structure including a sacrificial pile fixing part 14-1 and a wale pole fixing part 14-2. The sacrificial pile fixing part 14-1 is inserted into the H-beam-shaped sacrificial pile 12 and is respectively fixed to two flanges facing each other, and the wale fixing part 14-2 is a sacrificial pile fixing part ( 14-1), it is superimposed on the web of the wale 13 and fixed while connecting them.

An earth plate (form) 15 (shown in FIGS. 1, 6 and 7) may be installed between the sacrificial piles 12 for on-site casting of the wall part 11 . The earth plate 15 is fixed through the fixture 15a while both sides are inserted into the sacrificial pile 12 so as to prevent the soil from coming over from the back and also function as a formwork.

A plurality of support piles 20 are installed at a predetermined distance (preferably the same as the spacing of the sacrificial piles 12) at a certain distance behind the sacrificial pile 12 based on the construction state, and the tension member 30 The center between the sacrificial piles 12 is the installation location so that the sacrificial piles 12 can be installed inclinedly, that is, the sacrificial piles 12 and the supporting piles 20 are arranged in a zigzag form.

Support pile 20 is, for example, the bottom is inserted and fixed in the ground of the cut part.

The tension member 30 supports the composite wall 10 based on the support pile 20 as a support base, and while various materials such as flat iron, angle, cable, and beam can be used, both sides of the sacrificial pile 12 and It is fixed to the support pile (20).

The tension member 30 should be installed inclinedly for the connection of the sacrificial pile 12 and the support pile 20 arranged in a zigzag shape, and for this, inclined wedges 31 and 32 are used.

Inclined wedges 31 and 32 are installed on the side of the sacrificial pile 12 and the support pile 20, but the configuration is the same as one product, and should include inclined surfaces 31a and 32a of a certain angle, respectively.

Inclined wedges 31 and 32 are in the form of a box (top and bottom openable) in which inclined surfaces 31 and 32a are formed on one side while having a space therein, and inclined surfaces 31a and 32a are sacrificial piles 12 and support piles 20 ) and is fixed to the sacrificial pile 12 and the support pile 20 by welding, etc., respectively, and the tension member 30 is fixed to the inclined surfaces 31a and 32a with bolts and nuts.

As shown in Figures 1 and 8, when the slope is cut, water is absorbed on the back surface, increasing the earth pressure and making it more dangerous. When installed, it is effective to prevent overturning by receiving manual earth pressure.

In addition, when installing the drainage channel and installing the support pile 20 on the inclined surface, there may be a difference in height from the sacrificial pile, so the tension member 30 may be installed to be inclined upward (or downward) while going to the support pile 20, at this time At least one of the inclined wedges (31, 32) is a fastening hole of the inclined wedge (31, 32) to which the tension material 30 is fastened, the end side of the tension material is made in a circular shape, and the inner fastening hole is a fastening hole ( slot), and FIG. 9 shows, for example, that the fastening hole 32b is formed in the inclined wedge 32 installed on the support pile 20 . The tension member 30 can adjust the angle through the fastening hole.

A drainage passage 41 is constructed on the soil layer 40 between the composite wall 10 and the support pile 20, and the front restoration portion 42 and the drainage passage that slope downward from the height of the drainage passage 41 to the composite wall 10. It may include a rear recovery part 43 that is constructed to be inclined upward from the back of the 41 to the cut slope.

The drainage channel 41 is based on the support base of the head of the support pile 20 and it is also possible to be additionally fixed (bolts and nuts, anchors, welding, etc.) with the support piles 20 .

The front restoration part 42 and the rear restoration part 43 are the same restoration material, and earth and sand etc. are used.

A manual earth pressure part 44 made of concrete may be constructed in front of the drainage channel 41 . The passive earth pressure part 44 prevents the drainage passage 41 from being pushed forward, and it is preferable that the cross-sectional area increases as it goes downward.

10 shows a modified example of the composite wall 10, the bottom plate composite portion 12a is included in order to increase the rigidity in the bottom plate portion 11a of the wall portion 11.

The bottom plate composite part 12a is fixed in the form of a cantilever according to the position of the bottom plate part 11a with the same material (steel material) as the sacrificial pile 12, and is embedded in the bottom plate part 11a of the wall part 11, so that the wall part ( 11) to prevent cracks and breakage in the portion where the bottom plate portion 11a is connected.

In addition, the reinforcing material 12b may be included in the right leg portion where the sacrificial pile 12 and the bottom plate composite portion 12a are connected. The reinforcing material 12b may be a gusset plate type, a channel type, a strut type, or the like.

The construction method of the slope reinforcement structure using the bearing capacity and tension force according to the present invention is largely composed of the following steps: support pile installation - retaining facility installation - tension material installation - wall part construction.

1. Cut slope clearance (see Figure 12).

A part of the slope is cut for the installation of the support pile 20 and the cut slope is arranged, and at this time, the work level 1 of the flat floor is approximately the height of the upper end of the composite wall 10 . That is, the cut slope is arranged according to the height of the composite wall 10 .

2. Installation of supporting piles and sacrificial piles (refer to FIG. 13).

Install the support piles (20) approximately vertically from the working level (1) toward the inside of the slope. For example, the support piles 20 are installed by driving, or pile holes are formed on the slopes to insert and install the support piles 20, and then install them by filling the filler material.

Regardless of the installation method, the head of the support pile 20 protrudes above the work level 1 , and the protruding portion is a height for supporting the drainage channel 41 .

Then, the sacrificial pile 12 is installed in front of the support pile 20 . The installation method of the sacrificial pile 12 is also the same as the installation method of the support pile 20 , but the sacrificial pile 12 may be the same without the head protruding higher than the work level (1).

The sacrificial pile 12 is a level so that the fixing part 12-2 can be installed at a deeper depth than the bottom plate part 11a of the wall part 11 to be constructed in a subsequent process.

3. Install the tension member (see Fig. 14).

Inclined wedges 31 and 32 are installed on the sacrificial pile 12 and the support pile 20, respectively, and the tension member 30 is inclinedly disposed in the space behind the sacrificial pile 12, and the front and rear sides (left and right in the drawing) are inclined wedges. (31 and 32) are fixed respectively. After the tension material 30 is installed, the soil is backfilled to bury the tension material 30 . That is, it is restored to work level (1) again.

4. Completion of retaining facilities (see Fig. 15).

In order to secure a space in front of the sacrificial piles 12, the construction of the excavation and retaining facilities is completed, the sacrificial piles 12 are connected with a wale 13, and the earth plate 15 is installed between the sacrificial piles 12. The construction of the earth retaining facility is completed through the phased parallel of work and excavation.

Next, a drainage channel 41 is constructed on the soil layer 40 .

The drainage channel 41 can be both a method using a precast concrete product and a method using an on-site casting, and is constructed according to each method. At this time, it may include fixing the drainage channel 41 to the head of the support pile 20, and the fixing method can be variously implemented according to the above method.

A formwork is installed in the front part of the drainage passage 41, concrete is poured, the manual earth pressure part 44 is constructed, and the rear part is covered.

6. Wall construction (refer to Fig. 1)

The wall part 11 is constructed in front of the retaining facility including the sacrificial pile 12, and in the case of on-site casting, a casting space is placed in front of the sacrificial pile 12 and the earth plate 15, the formwork is installed and the reinforcing bar is reinforced, and the casting is performed. Concrete is poured into the space to construct the wall part 11 .

After completing the construction of the wall part 11, the bottom part is filled with soil, arranged and finished.

10: composite wall, 11: wall part
12: sacrifice stake, 12-1: retaining part
12-2: fixing unit,
13 : belt
14: belt wedge, 15: earth plate
20: support pile, 30: tension material
31,32: inclined wedge, 40: soil layer
41: drainage, 42: front recovery part
43: rear recovery part, 44: manual earth pressure part

Claims (7)

a plurality of support piles inserted into the ground of the slope at a predetermined distance from each other and supported by passive earth pressure by the soil layer of the slope;
a composite wall made of a combination of a concrete wall part and a retaining facility and constructed at a predetermined distance in front of the support pile;
a tension member fixed to the support pile and the composite wall to support the composite wall based on the support pile;
A drainage channel constructed on the surface of the soil layer between the support pile and the composite wall and a passive earth pressure part constructed on the front part of the drain passage,
The composite wall includes a plurality of sacrificial piles in which the retaining facilities are inserted into the ground at a certain distance from each other, a wale connected in a transverse direction between the sacrificial piles, and a earth plate installed between the sacrificial piles and , The wall part is synthetically constructed with the sacrificial pile,
The support pile is installed in a zigzag form with the sacrificial pile, and the tension member is installed to be inclined according to the zigzag shape of the composite wall and the support pile to connect the support pile and the composite wall in a chain,
The drainage path is supported by the head of the support pile protruding above the surface of the soil layer and the passive earth pressure part, and a front recovery part that slopes downward as it goes to the composite wall and a rear recovery part that is constructed to be inclined upward to the cut slope at the back. A slope reinforcement structure using a permanent retaining facility, characterized in that it is supported. delete delete The slope reinforcement structure using a permanent retaining facility according to claim 1, wherein the wale is connected to the sacrificial pile so as not to protrude in front of the sacrificial pile, and the wall portion has a thickness based on the sacrificial pile. The permanent retainer according to claim 1, wherein each of the sacrificial piles and the supporting piles includes an inclined wedge including an inclined surface, and the tension member is fixed while both sides of the longitudinal direction are respectively supported on the inclined surface of the inclined wedge. Slope reinforcement structures using facilities. As a construction method of a slope reinforcement structure using the permanent retaining facility according to claim 1,
A first step of inserting a plurality of support piles in the soil layer of the slope and installing the sacrificial piles in front of the support piles;
a second step of securing a space in the soil layer between the support pile and the sacrificial pile and installing a tension member by connecting both sides of the longitudinal direction to the support pile and the sacrificial pile of the retaining facility, respectively;
The third step of excavating the front part of the sacrificial pile and installing a wale and earth plate to construct a retaining facility, constructing a drainage channel and a manual earth pressure part on the soil layer between the support pile and the sacrificial pile, and constructing a front restoration part and a rear restoration part Wow;
A construction method of a slope reinforcement structure using a permanent retaining facility, comprising a fourth step of constructing a wall part of concrete in front of the retaining facility installed in the third step. The method according to claim 6, wherein the fourth step is to form a pouring space using the earth plate as a formwork by reinforcing reinforcing bars in front of the retaining facility and installing a formwork, and pouring concrete into the pouring space to construct a wall part. Construction method of slope reinforcement structure using permanent retaining system.

Images