KR100990820B1 - Constructing Method of Top-down type Retaining Wall - Google Patents

Abstract

The present invention in the installation of the retaining wall on the front surface of the slope to be vertically cut, the conventional method of installing the retaining wall by sequentially built up to the cutout of the top of the slope from the bottom to the upper side after cutting the slope downward with a cutting plan In contrast, in the construction method of the retaining wall of the new structure to excavate the slope from the upper side to the lower side, and at the same time to build the retaining wall in sequence, so that the retaining wall for the reinforcement of the vertical cutting slope can be quickly and economically constructed. It is about.

In the present invention, forming a hole (10) in the ground, the step of inserting the thumb pile 20 into the ground without filling material in the hole (10); Excavating the front ground of the thumb pile; And a retaining wall block 70 including a pile block 71 positioned in front of the thumb pile 20 in front of the thumb pile 20, and an intermediate block 72 stacked in a gap between the pile blocks. Stacking one by one to form a retaining wall wall; The pile block 71 has a protrusion 73 formed on the rear side, and a horizontal wall 74 is formed between the protrusions 73 so that the protrusion 73 is intermediate when the pile block 71 is stacked. A filling space portion 79 is formed between the protruding portion 73 and the transverse wall 74 so as to contact the wall 40; The intermediate block (72) is located between the pile blocks (71), and a gap is also formed between the intermediate block (72) and the intermediate wall (40); In the step of forming the retaining wall wall by stacking the retaining wall block 70, the filling space 79 is provided with a retaining wall construction method, characterized in that the filling material 80 is filled.

Retaining wall, construction, block, cut, vertical, downward

Description

Constructing Method of Top-down Type Retaining Wall

The present invention relates to a construction method of a reversing vertical cut slope reinforcing retaining wall, and more particularly, in installing the retaining wall on the front surface of a vertically cut slope, after cutting the slope downward with a cutting plan and moving upwards from below. Unlike the conventional method of installing the retaining wall by sequentially constructing the cutout at the top of the slope, the retaining wall for reinforcing the vertical cutout slope is made by digging the slope from the top to the bottom and cutting the wall of the retaining wall sequentially. It is about a method of constructing a retaining wall of a new structure that can be installed quickly and economically.

Due to the nature of Korea, which has a lot of mountainous terrain, many slopes are cut off during the construction of roads, railways, industrial complexes and residential lands, and retaining walls are often installed at the bottom of the cut slopes. However, as land prices increase and civil complaints increase due to environmental damage, it is increasingly necessary to construct retaining walls by vertically cutting slopes when installing such retaining walls.

As a method of constructing such a cut slope retaining wall, conventionally, a method of installing the retaining wall sequentially from the bottom after cutting the slope inclinedly has been used. However, when the slant is cut in such a manner, the amount of cut soil and the backfill after the retaining wall construction increase, resulting in an increase in the amount of earthwork, which causes the cost of construction and an increase in the construction period. In addition, problems such as collapse of the slope may occur at the time of cutting, or at the stage before the retaining wall construction after cutting.

In particular, when there is a facility such as a building on the back of the retaining wall installation position, there is a limit that it is impossible to cut it inclined itself. In this case, it is necessary to cut vertically for the protection of the facility. To ensure safety when cutting, a separate provision for preventing the collapse of the vertical cutting surface is to be installed separately, and after the cutting is completed, the retaining wall must be constructed upward from the bottom. Therefore, the cost according to the installation of the cut-away collapsed temporary installation is increased, and since the retaining wall is constructed only from the bottom of the cut-out surface, the increase in construction period cannot be avoided.

In addition, in the case of the retaining wall installed on the front of the cut slope, a retaining wall having an aesthetic appearance that can be harmonized with the surrounding environment is required. In the conventional construction method, the retaining wall exterior is beautiful because the wall of the retaining wall is constructed using site-cast concrete. There is a limit that is difficult to achieve. It is also possible to use a method of attaching the stone to the front of the retaining wall, but in this case, it is very disadvantageous in terms of cost and time because the stone must be manually attached by hand, and in the case of the high retaining wall, a separate work scaffold and scaffolding must be installed. In addition to the increase, the risk of a safety accident is high.

The present invention was developed to solve the above problems, and in the construction of the retaining wall by cutting the slope vertically or almost vertically, unlike the conventional method of constructing the retaining wall from below after vertical cutting, vertical cutting is possible. It aims to be able to construct vertical cut slope reinforcement retaining wall safely, quickly and inexpensively without installing any temporary equipment to prevent the collapse of the slope at the stage before or after the cutting.

In addition, the present invention in the construction of the retaining wall by cutting the slope vertically or almost close to the vertical, by constructing the wall of the retaining wall using a factory-prepared block in the precast method, the outer surface shape of the block is beautifully deformed An object of the present invention is to enable efficient construction of an excellent vertical cut slope reinforcing retaining wall.

In the present invention, in order to achieve the above object, forming a hole in the ground, the step of inserting the thumb pile into the ground without filling material in the hole; Excavating the front ground of the thumb pile; And forming a retaining wall wall by sequentially stacking a retaining wall block composed of a pile block positioned in front of the thumb pile and an intermediate block stacked at a distance between the pile blocks in front of the thumb pile; The pile block has a protrusion formed on the rear side, and a horizontal wall is formed between the protrusions so that when the pile blocks are stacked, the protrusion touches the intermediate wall to form a filling space between the protrusion and the horizontal wall; The intermediate block is located between the pile blocks, a gap is also formed between the intermediate block and the intermediate wall; In the step of forming the retaining wall wall by stacking the retaining wall block, the filling wall portion is provided with a retaining wall construction method, wherein a filling material is filled.

In the present invention as described above, between the step of excavating the front ground of the thumb pile and the stacking step of the retaining wall block, the step of installing an intermediate wall between the thumb pile exposed by excavation of the front ground may be further included, The intermediate wall between the thumb piles is composed of a earth plate, and prior to the step of installing the intermediate wall by the earth plate, the front of the thumb pile may further comprise the step of installing a earth plate support bracket.

In the present invention described above, in the step of forming the retaining wall wall by laminating the retaining wall block, the anchor block is installed in front of the thumb pile in the transverse direction over the plurality of thumb piles, and the anchor hole is drilled in the rear to anchor the anchor wall. After installing and fixing to the anchor block, the retaining wall block may be laminated on the anchor block.

Further, in the present invention, in the above-described configuration, the thumb pile is formed in the form so that the c-shaped thumb piles having a "c" cross section facing each other at intervals, and excavated the front ground of the thumb pile and the retaining wall block Between the laminating step, it is provided with a retaining wall construction method further comprises the step of anchoring the anchor hole by installing an anchor by drilling the anchor hole to the rear between the U-shaped thumb pile of the thumb pile.

In the present invention, an exposed surface of the thumb pile is provided with a block fixing member protruding; In the step of stacking the retaining wall blocks to form the retaining wall wall, when the retaining wall blocks are sequentially stacked, the blocks are laminated so that the block fixing member is positioned between the pile blocks of the upper and lower retaining wall blocks, and then the blocks are stacked. The block fixing member and the pile block may be fixed by the fastening member.

In addition, in the present invention, the pile block and the intermediate block of the retaining wall block may be integrally formed.

According to the present invention, in constructing the retaining wall by cutting the slope vertically or almost close to vertical, unlike the conventional method of constructing the wall of the retaining wall from below after the vertical cutting, the retaining wall wall is cut off when the ground is vertically cut. It is possible to construct a vertical cut slope reinforcement retaining wall safely, quickly and at low cost without installing a temporary facility to prevent the collapse of the slope before the construction stage.

In addition, according to the present invention, when constructing the retaining wall by cutting the slope vertically or almost vertically, by constructing the wall of the retaining wall using a factory-prepared block, the outer shape of the block is deformed beautifully, It is possible to efficiently construct a vertical cut slope reinforcing retaining wall with excellent aesthetics.

Next, a detailed configuration of an embodiment of the present invention will be described with reference to the drawings showing an embodiment of the present invention.

Figure 1a and Figure 1b is a view showing the construction method step of the thumb pile in the present invention, Figure 1a is a side cross-sectional view showing a state in which the construction of the thumb pile installation hole, Figure 1b is a plan perspective view of the thumb pile installed state.

First, as shown in FIGS. 1A and 1B, the hole 10 for installing the thumb pile 20 is drilled in the ground for constructing the retaining wall, and the thumb pile 20 is inserted into the hole 10. do. The thumb pile 20 generally uses an I beam, but in the present invention, the thumb pile 20 is not limited to the I beam, and a member suitable for a beam or other thumb pile 20 having various cross sections may be used. In addition, as shown in the figure, it is possible to install only the thumb pile 20 in the hole 10 and leave the inside of the hole 10, but after installing the intermediate wall 40 as described below, if necessary in any step Earth and sand may be filled in the hole 10 through which the thumb pile 20 is inserted. Of course, even if only the thumb pile 20 is inserted into the hole 10 and the inside of the hole 10 is empty, the inner wall of the hole 10 may naturally collapse and some soil may be partially filled in the hole 10.

In the drawing, the reference numeral 50 briefly shows a facility 50 such as a building located on the back of the retaining wall installation position.

As described above, in the present invention, while the thumb pile 20 is installed on the ground, the front surface of the ground is excavated step by step, and the intermediate wall 40 is installed between the thumb piles 20 at the excavated portion. Figure 2a is a schematic side cross-sectional view showing a state in which the front of the thumb pile 20 is excavated, Figure 2b is a middle wall 40 between the thumb pile 20 in the state shown in Figure 2a A schematic perspective view showing a state is shown. FIG. 2C shows a schematic side cross-sectional view in the state shown in FIG. 2B. In FIG. 2B, only two thumb piles 20 are shown, and only the middle wall 40 is installed therebetween, but for convenience, the other parts are omitted. That is, in addition to the two thumb piles 20 shown, a plurality of thumb piles may be further installed according to the width of the retaining wall, and the middle wall 40 may be configured between the thumb pile 20 and the thumb pile not shown. This is installed equally.

First, referring to FIGS. 2A to 2C, the construction step after the installation of the thumb pile 20 is inserted, and the front ground of the thumb pile 20 is vertically cut to the height of one or more retaining wall blocks as shown in FIG. 2A. do. When the front ground of the thumb pile 20 is vertically cut as described above, the outer portion of the thumb pile 20 (in the embodiment shown in the drawing, the outer flange or the outer flange and the web side of the I beam) is exposed. If necessary, between the thumb piles 20 will form an intermediate wall 40 for the ground support. In the embodiment shown in Figure 2b is sandwiched between the outer flange of the thumb pile 20 and the vertical ground surface of the thumb pile 20 to form an intermediate wall 40 between the thumb pile 20. In the case of forming the intermediate wall 40 using the earth plate in this manner, the thumb plate 20 has a bracket in advance so that the earth plate does not fall when additionally excavating the ground of the front of the thumb pile 20 downward as described below. 42 may be provided so that the earth plate is supported. The bracket 42 may function to support the retaining wall block 70 by allowing the retaining wall block 70 to rest on the bracket 42 when installing the retaining wall block 70 as described below. In the present invention, the bracket 42 is not limited to the configuration installed on the front of the thumb pile 20 as in the embodiment shown in the drawing, may be installed in a different shape on the side of the thumb pile 20, other earth plate Bracket 42 may be formed in various shapes that can support the.

In the above description, the intermediate wall 40 is formed by the earth plate, but in the present invention, the intermediate wall 40 may be formed by another configuration. 2D is a schematic perspective view showing an embodiment in which the intermediate wall 40 is formed of concrete as a view corresponding to FIG. 2B. Install the formwork (not shown) in front of the thumb pile 20 and cast concrete to the thickness between the outer flange of the thumb pile 20 and the vertical ground surface as shown in FIG. 2d or in a shotcrete method It is also possible to install the intermediate wall 40 by pouring.

In the above embodiment, the present invention has been described by installing the intermediate wall 40. However, when the condition of the ground is good, or when the height of the retaining wall is not high enough to require the intermediate wall 40, the intermediate wall 40 may be used. If is not necessary, the installation process of the intermediate wall 40 as described above may be omitted. In addition, in installing the thumb pile 20, even in the case of forming the main column pile wall in such a way that the holes 10 are continuously arranged and the thumb pile 20 is spaced apart in the holes 10. Installation of the wall 40 can be omitted.

Referring to the embodiment shown in the drawings again, when the intermediate wall 40 is installed as above, the retaining wall building block, that is, the retaining wall block 70, is stacked on the front surface of the intermediate wall 40.

FIG. 3A is a schematic perspective view illustrating an example of a process of stacking the retaining wall block 70, and FIG. 3B is a schematic perspective view showing a state in which the retaining wall block 70 is stacked, and FIG. 3C is illustrated in FIG. 3B. A cross-sectional side view of the state shown in is shown. In FIG. 3A and FIG. 3B, the retaining wall blocks 70 are stacked on the front of the two thumb piles 20 for convenience, and the other thumb piles 20 and the retaining wall blocks 70 are not shown.

As shown in the drawing, the retaining wall blocks 70 are sequentially stacked in front of the thumb pile 20 to form a retaining wall wall. In the embodiment shown in the drawing, the retaining wall block 70 is formed on the front of the thumb pile 20. It is divided into a pile block 71 to be located and an intermediate block 72 stacked in the gap between the pile block 71.

The pile block 71 has a protrusion 73 formed on the rear surface side, and a horizontal wall 74 is formed across the protrusion 73. The protrusion 73 is in contact with the intermediate wall 40 is formed between the protrusion 73 and the transverse wall 74 is a filling space portion 79 that can be filled with a filler. On the other hand, the intermediate block 72 is located between the pile block 71, there may be a gap between the intermediate block 72 and the intermediate wall 40, in which case the drainage material will be described later Is filled. The pile block 71 has various shapes. In the embodiment shown in the drawing, the front wall 76 is formed at intervals in front of the horizontal wall 74 of the pile block 71, so that the horizontal wall 74 is formed. ) And the front wall 76 has a structure in which the vegetation portion 75 is formed. The vegetation part 75 may be utilized as a space for planting vegetation by filling the soil. However, the vegetation portion 75 as described above may be omitted, and the lateral wall 74 may be the outer front surface of the pile block 71 without the vegetation portion 75. In addition, in the case of the intermediate block 72, a vegetation portion may be formed to fill the soil on the front surface to enable vegetation.

In the stacking of the pile block 71 in order, the block fixing member for fixing the thumb pile 20 and the pile block 71 to each other in order to prevent the stacked pile block 71 from falling or out of position ( 21) can also be installed. In the embodiment shown in the drawings, the block fixing member 21 is formed as a bar member is installed to protrude on the exposed surface of the thumb pile 20, it is located between the two upper, lower pile blocks (71). In order for the block fixing member 21 to be easily positioned between the upper and lower pile blocks 71, the recess 23 having the block fixing members 21 on the upper and lower surfaces of the pile block 71, respectively ( 5) is preferably formed. As shown in the figure, when the upper and lower pile blocks 71 are stacked with the block fixing member 21 interposed therebetween, the end of the block fixing member 21 protrudes to the front of the horizontal wall 75 and is positioned. In addition, the fastening member 22 is coupled to the end of the block fixing member 21 so that the pile block 71 is fixed to the block fixing member 21.

As such, when the pile block 71 is stacked on the front of the thumb pile 20, the filling space 79 fills the filling material 80 such as gravel, concrete, mortar, and the like. 3d is a schematic plan view of the retaining wall block 70 in a stacked state. Filler 80 as described above, may be filled after stacking a plurality of pile blocks 71 for each ground excavation section, but may be filled for the entire height in a batch after stacking all the retaining wall block 70 as a whole retaining wall height. have. On the other hand, the gap formed between the intermediate block 72 and the intermediate wall 40 may be filled with a drain material 81 of a porous material such as gravel.

In this way, after the retaining wall block 70 of the first stage is installed for a part of the height, the ground is further vertically cut in the downward direction of the retaining wall block 70, and the above operation is repeated until the retaining wall block ( 70) will be built. 4 is a schematic side cross-sectional view showing a state in which the second retaining wall block 70 is installed by further vertically cutting the ground beneath the installation of the retaining wall block 70 in the first step. That is, as shown in the drawing, when the retaining wall block 70 of the first stage is already installed, the ground vertical vertical cutting operation of the thumb pile 20 and the intermediate wall 40 are subsequently performed on the lower portion thereof. The installation work and the retaining wall block 70 installation work are repeated. This process is repeated to build retaining walls that fit the plan.

On the other hand, when performing the retaining wall block 70 lamination in the second step and subsequent steps, when filling the filling material 80 having a hardening property, the filling material 80 can be easily filled in the filling space (79) In order to ensure that, the top pile retaining wall 71 of the retaining wall block 70 stacked in a subsequent step may further include a configuration for placing the filling material 80 as follows.

5 shows an embodiment of the pile block 71 in a schematic perspective view, as shown in the figure, the main inlet 24 for injection of the filler material 80 into the lateral wall 74 of the pile block 71. To form a filling space behind the transverse wall (74) by inserting an injection tube or the like through the injection hole 24 in a state in which the pile block 71 is stacked on the top of the retaining wall block 70 in step 2 and subsequent steps ( 79, it is possible to easily fill the filling material (80).

Although the retaining wall block 70 has been described as being separated into the pile block 71 and the intermediate block 72 in the above embodiment, the retaining wall block 70 in the present invention is not limited to the above-described embodiment. Another embodiment of the retaining wall block 70 is shown in FIG. 6. In the present invention, as the retaining wall block 70, a block in which the pile block 71 and the intermediate block 72 are integrated is used. It could be. In addition, although not shown in the figure, a vegetation part capable of planting plants such as vegetation may be formed on the front surface of the intermediate block 72.

Meanwhile, in the present invention, the anchor block 60 may be used as needed before the retaining wall block 70 is laminated. FIG. 7A shows a schematic perspective view showing the installation of the anchor block 60 after the installation of the intermediate wall 40 as shown in FIG. 2B or 2D, and the anchor block 60 in FIG. 7B. A cross-sectional side view is shown showing the installed state. As shown in FIGS. 7A and 7B, the anchor block 60 is installed on the front surface of the thumb pile 20, that is, the front surface of the middle wall 40 in the transverse direction over the plurality of thumb piles 20, and then rearward. Install the anchor 61 by drilling the anchor hole. The end of the anchor 61 is fixed to the anchor block 60. The fixing of the end of the anchor 61 may be performed after the retaining wall blocks 70 are stacked. 7C and 7D are views corresponding to FIGS. 3A and 3B, respectively, and are perspective views illustrating a process of installing the retaining wall block 70 in a state where the anchor block 60 is installed and a state after installation. As shown in the figure, after the anchor block 60 is installed, the retaining wall block 70 is installed on the anchor block 60.

On the other hand, in installing the anchor 61 in this way, the anchor block 60 may not be used. 8A and 8B are perspective views and side cross-sectional views respectively corresponding to FIGS. 2B and 2C. In the embodiment shown in FIGS. 8A and 8B, the thumb piles 20 face each other with a U-shaped thumb pile having a "c" cross section. Consists of a form positioned to see, the tension member of the anchor 61 through the gap between the U-shaped thumb piles. The tension member end of the anchor 61 is fixed to the front of the thumb pile (20).

In the above-described embodiment shown in FIGS. 7A to 8B, other components are the same as the embodiment shown in FIGS. 1 to 6, and thus repeated descriptions thereof will be omitted.

Figure 1a is a side cross-sectional view showing the step of excavating the hole for the pile construction to construct a vertical cut slope reinforcement retaining wall according to the present invention, Figure 1b is a plan view of a state installed a thumb pile.

Figure 2a is a schematic side cross-sectional view showing a state in which the thumb pile front excavated in the present invention.

FIG. 2B is a schematic perspective view showing a state in which an intermediate wall is installed using a earth plate between the thumb piles in the state shown in FIG. 2A.

Fig. 2C is a schematic side cross-sectional view of a state in which an intermediate wall is installed using the earth plate.

2d is a schematic perspective view showing a state in which an intermediate wall is installed using concrete.

3A is a schematic perspective view illustrating an example of a process of stacking retaining wall blocks subsequent to the state shown in FIG. 2B.

3B is a schematic perspective view of the retaining wall blocks stacked by the steps shown in FIG. 3A.

3C is a schematic side cross-sectional view showing the state shown in FIG. 3B.

3D is a schematic plan view illustrating a state in which retaining wall blocks are stacked.

4 is a schematic side cross-sectional view showing a state in which the second retaining wall block is installed by further vertically cutting the ground beneath the installation of the retaining wall block of the first step;

5 is a schematic perspective view showing one embodiment of a pile block.

6 is a schematic perspective view showing another embodiment of the retaining wall block.

7A is a schematic perspective view showing a state in which an anchor block is installed in a state in which an intermediate wall is constructed.

Figure 7b is a side cross-sectional view showing a state in which the anchor block is installed.

7C and 7D are views illustrating an embodiment in which an anchor block is used as a perspective view and a side cross-sectional view corresponding to FIGS. 3A and 3B, respectively.

8A and 8B are views showing an embodiment using a U-shaped thumb pile having a "C" cross section as a perspective view and a side cross-sectional view corresponding to FIGS. 2B and 2C, respectively.

* Description of the symbols for the main parts of the drawings *

10: hole

20: thumb pile

70: retaining wall block

Claims (7)

Forming a hole (10) in the ground, and inserting the thumb pile (20) into the ground without filling material in the hole (10); Excavating the front ground of the thumb pile 20; And Retaining wall block 70 consisting of a pile block 71 positioned in front of the thumb pile 20 in front of the thumb pile 20 and an intermediate block 72 stacked in the gap between the pile blocks 71. ) Are sequentially stacked to form the retaining wall wall; The pile block 71 has a protrusion 73 formed on the rear side, and a horizontal wall 74 is formed between the protrusions 73 so that the protrusion 73 is intermediate when the pile block 71 is stacked. A filling space portion 79 is formed between the protruding portion 73 and the transverse wall 74 so as to contact the wall 40; The intermediate block (72) is located between the pile blocks (71), and a gap is also formed between the intermediate block (72) and the intermediate wall (40); Retaining wall construction method characterized in that the filling member (80) is filled in the filling space portion (79) in the step of forming the retaining wall wall by stacking the retaining wall block (70). The method of claim 1 Between the step of excavating the front ground of the thumb pile 20 and the stacking step of the retaining wall block 70, Retaining wall construction method further comprises the step of installing an intermediate wall (40) between the thumb pile (20) exposed by excavation of the front ground. The method of claim 2, The intermediate wall 40 between the thumb piles 20 is composed of earth plate, Retaining wall construction method further comprising the step of installing the earth plate support brackets 42 on the front of the thumb pile 20, prior to the step of installing the middle wall (40) by the earth plate. The method according to any one of claims 1 to 3, In the step of forming the retaining wall wall by stacking the retaining wall block 70, The anchor block 60 is installed in front of the thumb pile 20 in the transverse direction over the plurality of thumb piles 20, and the anchor block 60 is installed by drilling an anchor hole in the rear thereof so as to install the anchor block 60. After settling in, Retaining wall construction method characterized in that the retaining wall block (70) laminated on the anchor block (60). The method according to any one of claims 1 to 3, The thumb pile 20 is made of a form that is located to face each other with the gap between the U-shaped thumb pile having a "c" cross-section, Between the step of excavating the front ground of the thumb pile 20 and the stacking step of the retaining wall block 70, the anchor 61 is installed by drilling an anchor hole rearward between the U-shaped thumb piles of the thumb pile 20. Retaining wall construction method characterized in that it further comprises the step of fixing in front of the thumb pile (20). The method according to any one of claims 1 to 3, An exposed surface of the thumb pile 20 is provided with a block fixing member 21 protruding therefrom; In the step of stacking the retaining wall blocks 70 to form the retaining wall walls, when the retaining wall blocks 70 are sequentially stacked, the block fixing member 21 is disposed between the pile blocks 71 of the upper and lower retaining wall blocks. Laying the block so as to position, retaining wall construction method characterized in that the block fixing member 21 and the pile block (71) is fixed by a fastening member (22) after the blocks are stacked. The method according to any one of claims 1 to 3, A retaining wall construction method, characterized in that the pile block (71) and the intermediate block (72) of the retaining wall block (70) are integrated.

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