KR102607850B1 - bracket assembly for constructing self-supporting soil barrier with enhanced tension force transferring capability - Google Patents

Abstract

The bracket assembly for self-supporting earth retaining construction with improved tensile force transmission according to the present invention is: the top of the thumb pile constructed vertically on one side of the self-supporting earth retaining wall is inserted into the lower part, and the pile insertion portion is opened at the bottom so that the top of the thumb pile is covered. A bracket body formed to be; And, the strand of the earth anchor is integrally formed to extend to one side of the bracket body and is inserted into a drilling hole formed at an angle in the self-supporting earth retaining wall, and is provided so that the strand is inserted into the lower part and exposed to the upper part, and the strand is provided in the perforation hole. It includes a strand angle adjustment engagement portion provided to adjust the angle through which the strand passes so that it is stretched in the same direction as the inclination angle of the drilling hole in the form of a straight line according to the inclination angle,
The upper part of the bracket body is provided to be blocked, and is formed at an angle integrally with the upper part of the strand angle adjustment engagement portion.
As a result, the overall construction period required for construction is shortened by completely eliminating the need for line processing of thumb piles for self-supporting earth retaining construction, and there is no damage to the thumb piles, making it easy to reuse them in the future, and making it easier to reuse existing thumb piles. When forming a hole for earth retaining construction, there is no choice but to drill vertically, so the strand of the earth anchor is bent to an angle of 90° approximately in the shape of an 'ㄱ' and is stretched, resulting in insufficient transmission of tensile force, causing the earth retaining wall to easily collapse. Contrary to this, the drilling hole is formed at an angle in the self-supporting earth retaining wall and the strand is stretched in the same direction as the inclination angle of the drilling hole in a straight line according to the inclination angle of the drilling hole, so that the tensile force required when tensioning the strand is not sufficiently transmitted. Thus, it is possible to provide a bracket assembly for self-supporting earth retaining construction with improved tensile force transmission that can enable the construction of a sturdy earth retaining wall.

Description

Bracket assembly for constructing self-supporting soil barrier with enhanced tension force transferring capability}

The present invention relates to a bracket assembly for self-supporting earth retaining construction with improved tensile force transmission. More specifically, the overall construction period required for construction is shortened by eliminating the need for line processing of thumb piles for self-supporting earth retaining construction. , there is no damage to the thumb pile, making it easy to reuse in the future. In the past, when forming drilling holes for earth retaining construction, there was no choice but to drill them vertically, so the strand of the earth anchor was roughly in the shape of an 'ㄱ' at an angle of 90°. Unlike the case where tension is bent to an angle and the retaining wall easily collapses due to insufficient transmission of tensile force, the drilling hole is formed at an angle in the self-supporting retaining wall and the strand is formed in a straight line according to the inclination angle of the drilling hole. The present invention relates to a bracket assembly for self-supporting earth retaining construction with improved tensile force transmission properties that enable the construction of a sturdy earth retaining wall by ensuring that the tensile force required when tensioning the strand is sufficiently transmitted by being stretched in the same direction.

Currently, for the construction of underground structures, the earth anchor method is widely used to maintain earth retaining walls when excavating deep into the ground.

Here, in the above-mentioned earth anchor method, the earth anchor is anchored by digging in 10 m or more into the adjacent site, but if the use of the adjacent site is limited, the strut or raker method has no choice but to be applied every about 2.5 m of excavation height. However, there are significant disadvantages in terms of economic feasibility and construction conditions.

To solve this problem, a self-supporting earth retaining wall is constructed by installing piles vertically at predetermined intervals and installing earthen plates between the piles.

When installing piles vertically in the ground for the construction of the above-mentioned self-supporting earth retaining wall, in order to stably maintain the vertical state of the piles, the lower ends of the piles are sometimes embedded and fixed in a solidifying agent such as concrete or soil cement. . When an earth retaining wall is built, the lower end of the pile is driven into the ground and fixed. The lower end of the pile driven into the ground, that is, the perforated part of the ground where the root part of the pile is located, is filled with a cementing agent, and the root part of the pile is buried in the solidifying agent. By allowing the solidifying agent to harden, the root part of the pile is buried in the hardened solidifying agent.

However, according to the prestressed pile assembly according to the prior art, the pile must be pulled upward when dismantling it after construction, because the bracket that protrudes in the horizontal direction at the root of the pile is embedded in the hardened cement. Due to the bracket being in a damaged state, it becomes very difficult to pull the pile upward, and sometimes even impossible to pull out.

In this case, when it is impossible to pull the pile upward, there is a problem in that there is no choice but to give up recovery of the pile and sacrifice the entire pile, resulting in significant economic loss.

An example of a self-supporting earth retaining construction method according to the prior art is disclosed in Republic of Korea Patent Publication No. 10-2022-0010108 (published on January 25, 2022, hereinafter referred to as 'Patent Document 1').

On the other hand, the self-supporting earth retaining construction method according to the prior art, as shown in FIG. 1, includes a thumb pile 20 made of beam section steel and an upper bracket coupled to the top in a bolt fastening manner at the front of the thumb pile 20. This is achieved by (25) and the strand (30) of the earth anchor anchored by the upper bracket (25) in front of the thumb pile (20).

However, according to the self-supporting earth retaining construction method according to the prior art, in order to couple the upper bracket 25 to the thumb pile 20, fastening holes 27 for fastening bolts and nuts must be drilled in advance, thereby reducing the overall construction time. The construction period may be extended and the cost may increase, and due to damage to the thumb pile 20 due to the formation of the fastener hole 27, the fastener hole 27 must be removed from the thumb pile 20 in order to be reused for other purposes in the future. There is a problem that costs may increase because it must be repaired to be filled again.

In addition, according to the self-supporting earth retaining construction method according to the prior art, when forming a drilling hole for earth retaining construction, the drilling hole must be drilled vertically in line with the thumb pile (20), so to tension the strand (30), the strand (30) ) is bent to an angle of 90° approximately in the shape of an 'ㄱ' and thus tensioned, so the transmission of tensile force may be insufficient, which may cause the earth retaining wall to easily collapse, and during the tensioning process, it will inevitably invade the surrounding adjacent land rather than the relevant land. There is a problem that can be done.

Republic of Korea Patent Publication No. 10-2022-0010108 (published on January 25, 2022)

The purpose of the present invention is to reduce the overall construction period required for construction by eliminating the need for line processing of thumb piles for self-supporting earth retaining construction, and to facilitate future reuse by eliminating any damage to the thumb piles. , Conventionally, when forming drilling holes for earth retaining construction, there was no choice but to drill vertically, so the strand of the earth anchor was bent to an angle of 90° approximately in the shape of an 'ㄱ' to be tensioned. As a result, the transmission of tensile force was insufficient and the earth retaining wall was easily damaged. Unlike collapsing, the drilling hole is formed at an angle in the self-supporting earth retaining wall, and the strand is stretched in the same direction as the inclination angle of the drilling hole in a straight line according to the inclination angle of the drilling hole, so that the tensile force required when tensioning the strand is transmitted. The aim is to provide a self-supporting earth retaining construction bracket assembly with improved tensile force transmission that can be sufficiently achieved to enable the construction of a sturdy earth retaining wall.

In order to achieve the above object, the bracket assembly for self-supporting earth retaining construction with improved tensile force transmission according to the present invention is: the top of the thumb pile constructed vertically on one side of the self-supporting earth retaining wall is inserted into the lower part so that the top of the thumb pile is covered. A bracket body in which the pile insertion portion is formed to be open at the bottom; And, the strand of the earth anchor is integrally formed to extend to one side of the bracket body and is inserted into a drilling hole formed at an angle in the self-supporting earth retaining wall, and is provided so that the strand is inserted into the lower part and exposed to the upper part, and the strand is provided in the perforation hole. It includes a strand angle adjustment engagement portion provided to adjust the angle through which the strand passes so that it is stretched in the same direction as the inclination angle of the drilling hole in the form of a straight line according to the inclination angle,

The upper part of the bracket body is provided to be blocked, and is formed at an angle integrally with the upper part of the strand angle adjustment engagement portion.

Here, on the side of the bracket body, a plurality of fastening holes are drilled to accommodate pile tightening members that are fastened to tighten the thumb pile after the bracket body is covered with the top of the thumb pile. desirable.

In addition, the bracket body and the upper surface of the strand angle adjustment engagement portion have an acupressure plate with a through hole drilled in the center so that the strand that penetrates the inside of the strand angle adjustment engagement portion and begins to be exposed to the outside of the strand angle adjustment engagement portion is inserted and supported. It is preferable that it is coupled so that the position can be moved.

According to the present invention, by completely eliminating the need for line processing of thumb piles for self-supporting earth retaining construction, the overall construction period required for construction is shortened, and there is no damage to the thumb piles, making it easy to reuse them in the future. , Conventionally, when forming drilling holes for earth retaining construction, there was no choice but to drill vertically, so the strand of the earth anchor was bent to an angle of 90° approximately in the shape of an 'ㄱ' to be tensioned. As a result, the transmission of tensile force was insufficient and the earth retaining wall was easily damaged. Unlike collapsing, the drilling hole is formed at an angle in the self-supporting earth retaining wall and the strand is stretched in the same direction as the inclination angle of the drilling hole in a straight line according to the inclination angle of the drilling hole, thereby transmitting the tensile force required when tensioning the strand. It is possible to provide a bracket assembly for self-supporting earth retaining construction with improved tensile force transmission that can be sufficiently achieved to enable the construction of a sturdy earth retaining wall.

Figure 1 is a perspective view showing an example of a self-supporting earth retaining construction method according to the prior art;
Figure 2 is a side view showing a self-supporting earth retaining construction method using a bracket assembly for self-supporting earth retaining construction with improved tensile force transmission according to the present invention;
Figure 3 is a perspective view showing a self-supporting earth retaining construction method using a bracket assembly for self-supporting earth retaining construction with improved tensile force transmission according to the present invention;
Figure 4 is an enlarged perspective view of a bracket assembly for self-supporting earth retaining construction with improved tensile force transmission according to the present invention;
Figure 5 is a perspective view showing the process of covering the top of the thumb pile with the bracket assembly for self-supporting earth retaining construction with improved tensile force transmission according to the present invention;
Figure 6 is a view showing a position-variable stiffener provided inside the bracket assembly for self-supporting earth retaining construction with improved tensile force transmission according to the present invention;
Figure 7 is an enlarged perspective view of the position variable stiffener of Figure 6.

Hereinafter, the present invention will be described in detail with reference to the attached drawings.

The bracket assembly for self-supporting earth retaining construction with improved tensile force transmission according to the present invention is, as shown in FIGS. 2 to 5, the upper end of the thumb pile (20) installed vertically on one side of the self-supporting earth retaining wall (10). The bracket body 100 is inserted into this lower part and the pile insertion portion 110 is formed open at the bottom so as to cover the top of the thumb pile 20, and is integrally formed to extend to one side of the bracket body 100 to provide a self-supporting earth retaining structure. The strand (30) of the earth anchor, which is inserted into the drilling hole (11) formed at an angle in the wall (10), is inserted into the lower part and is provided to be exposed and extended upward, and the strand (30) is installed according to the inclination angle of the drilling hole (11). It includes a strand angle adjustment engagement portion 200 provided to adjust the angle through which the strand 30 penetrates so that it is stretched in the same direction as the inclination angle of the perforated hole 11 in the form of a straight line.

Here, as shown in FIG. 4, the upper part of the bracket body 100 is provided so as to be blocked, and it is preferable that it is integrally formed at an angle with the upper part of the strand angle adjustment engaging portion 200. Meanwhile, as shown in FIG. 6, the inner upper surface of the strand angle adjustment engagement portion 200 is curved so that it gradually becomes thicker from the portion connected to the bracket body 100 to the portion where the strand 30 penetrates. It is desirable to ensure that the support strength for the strand 30 is reinforced.

Accordingly, by eliminating the need for line processing of thumb piles for self-supporting earth retaining construction, the overall construction period required for construction is shortened, and there is no damage to the thumb piles, making it easier to reuse them in the future, and When forming a hole for earth retaining construction, there is no choice but to drill vertically, so the strand of the earth anchor is bent to an angle of 90° approximately in the shape of an 'ㄱ' and is stretched, resulting in insufficient transmission of tensile force, causing the earth retaining wall to easily collapse. Contrary to this, the drilling hole is formed at an angle in the self-supporting earth retaining wall and the strand is stretched in the same direction as the inclination angle of the drilling hole in a straight line according to the inclination angle of the drilling hole, so that the tensile force required when tensioning the strand is not sufficiently transmitted. Thus, it is possible to provide a bracket assembly for self-supporting earth retaining construction with improved tensile force transmission that can enable the construction of a sturdy earth retaining wall.

As shown in Figures 2 and 3, the strand (30) of the earth anchor, which is tensioned by the bracket assembly for self-supporting earth retaining construction with improved tensile force transferability according to the present invention, is inserted into the deepest bottom of the drilling hole (11). The anchor inner body 40 that is installed is connected.

Meanwhile, as shown in FIG. 4, the side of the bracket body 100 is covered with the top of the thumb peg 20 so that the bracket main body 100 covers the top of the thumb peg 20, and then the thumb peg 20 is placed on the side of the bracket body 100. A plurality of fastening holes 120 are drilled into the pile fastening members to be tightened.

Accordingly, after the bracket body 100 of the bracket assembly for self-supporting earth retaining construction according to the present invention is covered with the top of the thumb pile 20, pile fastening members such as bolts are easily and conveniently fastened with a plurality of fasteners 120. By doing so, the bracket body 100 can be firmly maintained installed on the upper part of the thumb pile 20 without any damage to the thumb pile 20.

Here, a plurality of fastening holes 120 are preferably formed vertically on both left and right sides of the front and rear plates of the bracket body 100, respectively.

Meanwhile, as shown in FIGS. 4 and 6, on the left and right sides of the bracket body 100, a position variable stiffener, which will be described later, is inserted into the concave side of the thumb peg 20 made of an H beam inside the bracket body 100. It is preferable that the stiffener adjustment slot 130 is perforated vertically long so that the position of the thumb peg 20 can be adjusted along the vertical longitudinal direction of the thumb peg 20.

Accordingly, the operator allows the position of the position-variable stiffener 400 to be easily varied along the vertical longitudinal direction of the thumb pile 20 through the stiffener adjustment slot 130, so that when the strand 30 is tensioned, the thumb pile 20 ) can be effectively reinforced and prevented at the optimal position by the position variable stiffener 400.

Meanwhile, as shown in FIG. 4, the bracket body 100 and the upper surface of the strand angle adjustment engagement portion 200 have a strand of the strand angle adjustment engagement portion 200 that penetrates the inside of the strand angle adjustment engagement portion 200. It is preferable that the acupressure plate 300, which has a through hole 310 perforated in the center, is coupled so that the position can be moved so that the strand 30, which begins to be exposed to the outside, is inserted and supported.

Accordingly, the acupressure plate 300, in which the strand 30 is inserted and fixed into the through hole 310, is positioned up and down at the top of the strand angle adjustment engagement portion 200 according to the inclination angle of the perforation hole 11. By fitting and assembling the rear bracket body 100 and the upper slope of the strand angle adjustment engagement portion 200 in the form of matching, the strand 30 is stretched in a straight direction to match the drilled hole 11 as much as possible, thereby maintaining the tensile force. We can ensure that this is conveyed as much as possible.

Here, as shown in FIG. 4, a plurality of bracket fitting protrusions 320 are formed in a convex shape on both left and right sides of the acupressure plate 300 to be symmetrical to each other, and brackets are placed on both left and right sides of the strand angle adjustment engagement portion 200. It is preferable that a plurality of acupressure plate engagement grooves 210 are formed in a concave shape corresponding to the bracket fitting protrusion 320 so that the fitting protrusions 320 are fitted and engaged with each other.

Accordingly, the acupressure plate 300 is positioned at the selected position on the upper slope of the bracket body 100 and the strand angle adjustment engagement portion 200 by mutual engagement between the bracket fitting protrusions 320 and the acupressure plate engaging grooves 210. It can be firmly fixed and assembled.

In addition, the strand 30 is not tensioned by being bent to an angle of 90° in the shape of an 'L' as in the past, but the strand 30 is formed to be inclined by the strand angle adjustment engagement portion 200 and the acupressure plate 300. By tensioning in a straight direction to match the drill hole 11 as much as possible, the possibility of unavoidably invading land adjacent to the surrounding land other than the site where construction is performed during the tensioning process of the steel wire 30 can be minimized. .

Meanwhile, as shown in Figure 6, the bracket assembly for self-supporting earth retaining construction with improved tensile force transmission according to the present invention has a thumb provided as an H beam inside the bracket body 100 covered with the top of the thumb pile 20. The position is adjusted along the vertical longitudinal direction of the thumb pile (20) by the concave side of the pile (20), and when the worker tightens it through the stiffener adjustment slot (130), both sides press and secure the thumb pile (20). It is desirable to further include a variable stiffener 400.

Accordingly, the width direction strength of the thumb pile 20 is reinforced by the position variable stiffener 400, so that buckling deformation of the thumb pile 20 when the strand 30 is tensioned is prevented by the position variable stiffener 400. It can be done as much as possible.

As shown in FIGS. 6 and 7, the position variable stiffener 400 includes male threads on both left and right sides and is moved outward by rotation and includes a beam pressing support 410 provided to press the thumb peg 20. And, it is provided to include a female thread between the beam pressure supports 410 provided on both left and right sides, and the beam pressure supports 410 on both left and right sides are each thumb pile ( The thumb peg ( 20) It includes a fixing part 430 for fastening the fastening member so that the positions of the beam pressure support part 410 and the adjustment nut 420 are fixed to the thumb peg 20 when pressed and adhered.

Accordingly, the beam pressure support portion 410 is provided to press and release the thumb pile 20 by simple operation of the adjustment nut 420, so that the position variable stiffener 400 can be adapted to the conditions of the field construction site. Therefore, it is possible to easily move the position along the vertical longitudinal direction of the thumb pile (20) and at the same time, the strength is effectively strengthened in the transverse width direction of the thumb pile (20) at a position where buckling deformation of the thumb pile (20) is most effectively prevented. It can be reinforced.

Although the technical aspect has been described above and in the accompanying drawings, the technical idea of the present invention is for explanation purposes only and is not intended to be limiting, and those skilled in the art will understand the present invention. It will be understood that various modifications and changes can be made to the technical idea of the present invention without departing from the technical scope described in the claims, which will be described later.

100: Bracket body 110: Pile insertion part
120: Tightening hole 130: Stiffener adjustment slot
200: Straight wire angle adjustment engagement portion 210: Acupressure plate engagement groove portion
300: Acupressure plate 310: Through hole
320: Bracket insertion protrusion 400: Position variable stiffener
410: Beam pressurizing support 420: Adjusting nut

Claims (3)

The upper end of the thumb pile 20, which is constructed vertically on one side of the self-supporting retaining wall 10, is inserted into the lower part, and the pile insertion portion 110 is formed to be open at the bottom so that the upper end of the thumb pile 20 is covered. The bracket body ( 100); and
The strand 30 of the earth anchor, which is integrally formed to extend to one side of the bracket body 100 and is inserted into the drilled hole 11 formed at an angle in the self-supporting earth retaining wall 10, is inserted into the lower part and exposed to the upper part. It is provided so that the angle through which the strand 30 passes is adjusted so that the strand 30 is stretched in the same direction as the inclination angle of the perforation hole 11 in the form of a straight line according to the inclination angle of the perforation hole 11. A strand angle-adjustable engagement portion (200) provided;
Including,
The upper part of the bracket body 100 is provided to be blocked, and is integrally formed at an angle with the upper part of the strand angle adjustment engaging portion 200,
The upper surface of the bracket body 100 and the strand angle adjustment engagement portion 200 begins to penetrate the inside of the strand angle adjustment engagement portion 200 and begins to be exposed to the outside of the strand angle adjustment engagement portion 200. The acupressure plate 300, which has a through hole 310 formed in the center so that the strand 30 is inserted and supported, is movably coupled,
On both left and right sides of the acupressure plate 300, a plurality of bracket fitting protrusions 320 are formed side by side and symmetrical to each other in a convex shape, and the bracket fitting protrusions 320 are fitted on both left and right sides of the strand angle adjustment engagement part 200. A plurality of acupressure plate engaging grooves 210 are formed side by side and symmetrical to each other in a concave shape corresponding to the bracket fitting protrusion 320 to engage,
On the left and right sides of the bracket body 100, stiffener adjustment slots 130 are vertically drilled to lengthen vertically,
The position is adjusted along the vertical longitudinal direction of the thumb pile 20 by the concave side of the thumb pile 20 provided as an H beam inside the bracket body 100, which is covered with the top of the thumb pile 20, and the operator A bracket assembly for self-supporting earth retaining construction with improved tensile force transmission, further comprising a position variable stiffener (400) provided so that both sides press and secure the thumb pile (20) when tightened through the stiffener adjustment slot (130). .

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