KR102626431B1 - Thumb pile using guide bracket and bottom part of drilling diameter ground anchor and construction method for retaining temporary facility using the same - Google Patents

Abstract

In the present invention, a guide bracket is installed on the head of a pile, a tension member of a ground anchor is installed and anchored to the guide bracket, and then the tension member is tensioned at the front of the excavation to apply a load on the back side to the head of the pile. Even without installing a separate support material on the excavation side, there is no risk of the pile falling or collapsing into the excavation space, and even in a narrow space in the city, it is not only independent of the narrowness of the ground site on the back side of the pile, but also before and after excavation. The purpose is to provide thumb piles using guide brackets and ground anchors at the bottom of the borehole, and a construction method for temporary earth retaining facilities using the same, which allows the construction of temporary earth retaining facilities regardless of the structure.
The thumb pile using a guide bracket and a ground anchor at the bottom of the borehole according to the present invention to achieve the above object includes a pile having a predetermined shape; A guide bracket coupled to an upper end of one side of the pile; a ground anchor in which one side of the tension member is wound around the guide bracket and the other side is fixed to the support; The pile is disposed at the top, and the ground anchor is partially embedded in the support adjacent to the pile.
In addition, in order to achieve the above object, a method of constructing a temporary earth retaining facility using thumb piles using a guide bracket and a ground anchor at the lower end of a perforation mirror according to the present invention includes a pile having a predetermined shape; A guide bracket coupled to an upper end of one side of the pile; a ground anchor in which one side of the tension member is wound around the guide bracket and the other side is fixed to the support; A method of constructing a temporary earth retaining facility using a guide bracket consisting of a support body in which the pile is placed at the top and a ground anchor is partially embedded adjacent to the pile, and a thumb pile using a ground anchor at the bottom of the borehole, and the ground is of a certain diameter and Forming a drill hole by excavating to a depth; Inserting a thumb pile combining a pile and a ground anchor into the drilling hole; Forming a support by pouring and curing concrete inside the drill hole so that the ground anchor is partially buried; Fixing the tension member installed on the ground anchor to the guide bracket of the thumb pile using the guide bracket and the ground anchor at the bottom of the borehole mirror; It is characterized in that it consists of the step of tensioning the tension member with a constant tension force at the front part of the excavation.

Description

Thumb pile using guide bracket and bottom part of drilling diameter ground anchor and construction method for retaining temporary facility using the same {Thumb pile using guide bracket and bottom part of drilling diameter ground anchor and construction method for retaining temporary facility using the same}

The present invention relates to a thumb pile using a guide bracket and a ground anchor at the bottom of the borehole, and a method of constructing a temporary earth retaining facility using the same. In particular, a ground anchor is installed in the ground on the back side of the pile, installed at the bottom of the pile borehole, and the pile is A guide bracket is installed on the head of the pile, and after fixing the tension member of the ground anchor to the guide bracket, the tension member is tensioned at the front of the excavation to apply a load on the back side to the head of the pile, thereby creating a separate support material on the excavation side. Even without installation, there is no risk of the pile falling or collapsing into the excavation space, and the thumb using a guide bracket and ground anchor at the bottom of the borescope allows excavation work to be done safely and easily at low cost even in narrow spaces in urban areas. This relates to piles and methods of constructing temporary earth retaining facilities using them.

For the construction of underground structures, earth retaining structures are installed surrounding the work area, which include thumb pile earth walls, diaphragm walls, sheet piles, and C.I.P. Various construction methods are being applied.

This conventional earth retaining method has the following problems.

When carrying out excavation work, a retaining wall alone cannot resist the earth pressure of the background soil, so a large number of support materials (Strut, Earth Anchor, Raker, etc.) must be used to reinforce it.

However, the above-mentioned earth anchor method involves anchoring an earth anchor by digging into the adjacent site more than 10m, but when the use of the adjacent site is restricted, the strut or raker method has no choice but to be applied every 2.5m of excavation height, which is difficult to achieve due to economic feasibility and construction conditions. There is a huge disadvantage.

In addition, the conventional method using braces and anchor holes tightly installs braces at intervals of 2 to 3 m in the vertical direction of the excavation, which narrows the work space and causes inconvenience in the use of heavy equipment. In addition, when anchors are used, it is difficult to use heavy equipment in urban excavations. There are problems causing significant difficulties in construction due to invasion of private land, damage to existing structures, and inflow of nearby groundwater.

Registered Patent 10-1498711

Accordingly, the present invention was developed to solve the problems described above. A guide bracket is installed on the head of the pile, and the tension member of the ground anchor is installed on the guide bracket to add the lower end of the pile borehole without drilling a separate anchor. After fixing the perforated area with ready-mix concrete, grouting, etc., the tension member is tensioned at the front of the excavation to apply a load on the back side to the head of the pile, so that the pile falls into the excavation space without installing a separate support material on the excavation side. There is no risk of falling or collapsing, and the guide bracket and ground anchor at the bottom of the borehole allow for the construction of temporary earth retaining facilities regardless of the narrowness of the ground site on the back side of the pile even in narrow spaces in urban areas, and regardless of whether before or after excavation. The purpose is to provide thumb piles using and a method of constructing temporary earth retaining facilities using them.

A thumb pile using a guide bracket and a ground anchor at the bottom of the borehole according to the present invention to achieve the above object includes a pile having a predetermined shape; A guide bracket coupled to an upper end of one side of the pile; a ground anchor in which one side of the tension member is wound around the guide bracket and the other side is fixed to the support; The pile is disposed at the top, and the ground anchor is partially embedded in the support adjacent to the pile.

In addition, in order to achieve the above object, a method of constructing a temporary earth retaining facility using thumb piles using a guide bracket and a ground anchor at the lower end of a boring mirror according to the present invention includes a pile having a predetermined shape; A guide bracket coupled to an upper end of one side of the pile; a ground anchor in which one side of the tension member is wound around the guide bracket and the other side is fixed to the support; A method of constructing a temporary earth retaining facility using a guide bracket consisting of a support body in which the pile is placed at the top and a ground anchor is partially embedded adjacent to the pile, and a thumb pile using a ground anchor at the bottom of the perforation mirror, and the ground is of a certain diameter and Forming a drill hole by excavating to a depth; Inserting a thumb pile combining a pile and a ground anchor into the drilling hole; Forming a support by pouring and curing concrete inside the drill hole so that the ground anchor is partially buried; Fixing the tension member installed on the ground anchor to the guide bracket of the thumb pile using the guide bracket and the ground anchor at the bottom of the borehole; It is characterized in that it consists of the step of tensioning the tension member with a constant tension force at the front part of the excavation.

As described above, the thumb pile using the guide bracket and the ground anchor at the bottom of the bore mirror according to the present invention and the temporary earth retaining facility construction method using the same have the following effects.

First, the present invention installs a guide bracket at the upper end of one side of the pile, installs the tension member of the ground anchor on the guide bracket and anchors it to the head of the pile, and then tensions the tension member at the front of the excavation to attach it to the head of the pile on the back side. By applying a load of , there is an advantage that there is no risk of the pile falling or collapsing into the excavation space even without installing a separate support material on the excavation side.

Second, the present invention has the effect of constructing a temporary earth retaining facility regardless of the narrowness of the ground site on the back side of the pile even in a narrow space in the city center, regardless of before or after excavation.

Third, in the present invention, the ground anchor is anchored to the lower support of the pile borehole, thereby saving the drilling cost of the vertical ground anchor, and the tension member combined with the ground anchor tensions the head of the pile to the outside of the trench space, thereby allowing the pile to enter the trench space. It has the advantage of eliminating concerns about falling or collapsing.

Fourth, the present invention has the advantage of minimizing the installation of support materials or strips on the excavation side, which not only makes it easier to secure work space but also improves workability.

Figure 1 is a perspective view showing a thumb pile using a guide bracket and a ground anchor at the bottom of the borescope according to the present invention;
Figure 2 is a front view showing a thumb pile using a guide bracket and a ground anchor at the bottom of the borescope according to the present invention;
Figure 3 is a plan view showing a thumb pile using a guide bracket and a ground anchor at the bottom of the borescope according to the present invention;
Figure 4 is a cross-sectional view showing a thumb pile using a guide bracket and a ground anchor at the bottom of the borescope according to the present invention;
Figure 5 is an exploded perspective view showing a thumb pile using a guide bracket and a ground anchor at the bottom of the borescope according to the present invention;
Figure 6 is a perspective view showing a guide bracket according to the present invention and a guide bracket for a thumb pile using a ground anchor at the bottom of the borescope;
Figure 7 is a front view showing a guide bracket for a thumb pile using a guide bracket and a ground anchor at the bottom of the borescope according to the present invention;
Figure 8 is a plan view showing a guide bracket for a thumb pile using a guide bracket and a ground anchor at the bottom of the borescope according to the present invention;
Figure 9 is a side view showing a guide bracket for a thumb pile using a guide bracket and a ground anchor at the bottom of the borescope according to the present invention;
Figure 10 is a construction diagram showing the state of constructing a temporary earth retaining facility using a guide bracket according to the present invention and a thumb pile using a ground anchor at the bottom of the borescope.

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

[Thumb pile using guide bracket and ground anchor at the bottom of the borescope]

Figure 1 is a perspective view showing a thumb pile using a guide bracket and a ground anchor at the bottom of the borescope according to the present invention, and Figure 2 is a front view showing a thumb pile using a guide bracket and a ground anchor at the bottom of the borescope according to the present invention. Figure 3 is a plan view showing a thumb pile using a guide bracket and a ground anchor at the bottom of the borescope according to the present invention, and Figure 4 is a cross-sectional view showing a thumb pile using a guide bracket and a ground anchor at the bottom of the borescope according to the present invention. 5 is an exploded perspective view showing a thumb pile using a guide bracket and a ground anchor at the bottom of the borescope according to the present invention.

As shown in these drawings, the thumb pile (P) using a guide bracket and a ground anchor at the bottom of the boring mirror according to the present invention includes a pile (100) having a predetermined shape; A guide bracket 200 coupled to one upper end of the pile 100; A ground anchor 300 in which one side of the tension member 320 is wound around the guide bracket 200 and the other side fixes the ground anchor at the lower end of the boring mirror to a support body; The pile 100 is disposed at the top, and the ground anchor 300 is partially embedded in the support body 400 adjacent to the pile 100.

In other words, the thumb pile (P) using the guide bracket and the ground anchor at the bottom of the boring mirror according to the present invention is a structure formed by organically combining the pile (100), the guide bracket (200), the ground anchor (300), and the support body (400). am.

Here, the pile 100 is composed of any one of section steel, H-beam steel, I-beam, U-beam, A-beam, steel pipe, hollow pipe, round steel pipe, square pipe, and section steel.

In particular, the section steel is a general term for long steel pre-formed into a certain cross-sectional shape such as H-type or L-type. It is mainly used in civil engineering, architectural columns or beams, foundation piles and mechanical products, etc. There are various section steels depending on the shape of the cross section. , it is used according to epidemiological rationality and purpose of use.

In addition, the H-beam steel is a section steel with an H-shaped cross section that is widely used in the framing of large structures such as buildings and ships or in civil engineering work, and is made by hot rolling.

Here, the part corresponding to the horizontal bar in the center of the H-beam is called the web, and the parts corresponding to the vertical bars on both sides are called the upper and lower flanges. The upper and lower flanges of 300 mm or less are called junior size, and those of 300 mm or more are called senior size. .

In addition, there is an I-beam with a cross section similar to the H-beam. In the H-beam, the thickness of the upper and lower flanges is constant all the way to the end, the ends of the upper and lower flanges are not rounded, and in the I-beam, the width is smaller than the height. The difference in H-beam steel is that the width is the same as the height.

The wider one is called wide flange H-beam steel, and its overall cross-section is square, making it easy to use as a building pillar.

The specifications are specified in KS D 3503, and the shape and dimensions are specified in KS D 3051.

Meanwhile, a steel pipe is a construction material made of an alloy of iron and carbon, meaning that the cross section is a circular pipe or a hollow rectangular pipe. It should be noted that square pipes and pipes of various shapes can be used as needed.

In particular, it should be noted that no special technical requirements are required when using a circular pipe as a variety of pipes such as square pipes and closed bend pipes.

In addition, the guide bracket 200 includes a reinforcing plate 210 having a certain thickness and width, as shown in FIGS. 6 to 9; A side plate 220 extending at right angles from both ends of the reinforcement plate 210; A cover plate 230 welded to a certain section above the side plate 220; A bottom plate 240 welded to the bottom of the side plate 220; It consists of a semicircular fixed pulley 250 coupled between the upper surface of the bottom plate 240 and the side plate 220.

That is, a support bracket is formed by welding a plurality of steel plates 210, 220, 230, and 240 longitudinally and horizontally to the guide bracket 200, and a semicircular fixing pulley 250 is installed on the support bracket.

Here, a through hole 212 for inserting the tension member 320 of the ground anchor 300 is formed in the reinforcing plate 210 in the guide bracket 200, and the tension member inserted into the through hole 212 is formed. (320) is caught on the semicircular fixing pulley 250 and the angle is changed by the semicircular fixing pulley 250 to extend horizontally toward the top of the pile 100.

In addition, the ground anchor 300 includes an anchor body 310 that is disposed on a support body inside the drilling hole and has a constant weight, and has a screw-shaped outer surface; It is composed of a tension member 320 that is embedded in one side of the anchor body 310 and at the same time is pulled to the other side to a certain length.

That is, the ground anchor 300 has a structure in which the anchor body 310 and the tension member 320 are organically combined.

Here, the anchor body 310 is fixed to a support having a certain weight fixed with ready-mixed concrete, etc. to the additional perforation part of the lower end of the thumb pile perforation mirror.

In addition, the tension member 320 is fixed to the head 110 of the pile 100 on one side, and the other side is fixed to the anchor body 310 fixed to the ground (G).

The ground anchor 300 is installed vertically or inclined to the opposite side of the pile 100 in a drilled hole in the ground (G) on the rear side of the pile 100.

The lower part of the above-mentioned ground anchor 300 is fixed to the anchor body 310 with tension applied to the tension member 320, and the upper part is fixed to the head 110 of the pile 100 through the guide bracket 200. do.

Here, a straight ground action line (L) of about 20 to 45° at the depth of the excavation area can be assumed in the ground (G) around the excavation area where the ground anchor 300 is installed. The ground anchor 300 The anchor body 310 is installed at a location deeper than the ground action line (L) (stable area).

Accordingly, the tension of the ground anchor 300 can be stably exerted.

Here, the ground anchor 300 applies a horizontal force to the head 110 of the pile 100 by applying a vertical reaction force and a horizontal reaction force to the ground (G) through the guide bracket 200.

As a result, a load in the direction in which the pile 100 falls to the back ground (G) acts on the pile 100, so the moment and deformation in the direction in which the pile 100 falls into the excavation area are alleviated, thereby reducing the excavation area of the pile 100. Falling to the side is prevented.

Meanwhile, the support body 400 is formed to firmly support the ground anchor 300 and reinforce the ground inside the drilling hole.

It should be noted that the support 400 is formed by filling the inside of the drilled hole with soil cement, concrete, cement milk, etc., and is not limited to any specific material.

The thumb pile (P) using the guide bracket and the ground anchor at the bottom of the boring mirror according to the present invention, which is configured as described above, installs the ground anchor (300) on the ground (G) on the back side of the pile (100), and the pile A guide bracket 200 is installed on the head 110 of (100), and the tension member 320 of the ground anchor 300 is installed and fixed on the guide bracket 200, and then the tension member 320 is tensioned. By applying a load on the back side to the head 110 of the pile 100, there is no risk of the pile 100 falling or collapsing into the excavation space even without installing a separate support material on the excavation side. It has the effect of enabling excavation work to be done safely and easily at low cost even in a narrow space.

[Construction method for temporary earth retaining facilities]

Figure 10 is a construction diagram showing the state of constructing a temporary earth retaining facility using a guide bracket according to the present invention and a thumb pile using a ground anchor at the bottom of the borehole.

As shown in this drawing, the method of constructing a temporary earth retaining facility using thumb piles using a guide bracket and a ground anchor at the bottom of the borehole according to the present invention is

A pile (100) made of a predetermined shape; A guide bracket 200 coupled to one upper end of the pile 100; a ground anchor (300) in which one side of the tension member (320) is wound around the guide bracket (200) and the other side is fixed to the support; A thumb pile (P) using a guide bracket consisting of a support body 400 in which the pile 100 is placed at the top and a ground anchor 300 is partially embedded adjacent to the pile 100, and a ground anchor at the lower end of the boring mirror. A method of constructing a temporary earth retaining facility using a method comprising the steps of excavating the ground (G) to a certain diameter and depth to form a drilling hole; Inserting a thumb pile (P) combining a pile (100) and a ground anchor into the drilling hole; Forming a support by pouring and curing concrete inside the drill hole so that the ground anchor is partially buried; Fixing the tension member 310 installed on the ground anchor 300 to the guide bracket 200 of the thumb pile (P) using a guide bracket and a ground anchor at the bottom of the borehole mirror; It consists of tensioning the tension member 310 with a constant tension force at the front of the excavation.

Here, the ground anchor 300 is embedded in the support within the drilling hole vertically in the same direction as the pile 100.

In addition, the ground anchor 300 is installed at a position deeper than the ground action line (L) of the ground (G) on the back side of the pile 100 and is simultaneously embedded in the support inside the drill hole.

In other words, the method of constructing a temporary earth retaining facility using thumb piles using a guide bracket and a ground anchor at the lower end of the drilling mirror according to the present invention involves excavating the ground (G) using an excavator such as an auger to form a drilling hole, and attaching a ground anchor to the drilling hole. is inserted, and concrete is poured and cured at the bottom of the drilling hole, including the ground anchor, to form a support with a certain portion of the ground anchor buried, and a pile (100) with a guide bracket attached to the support in the drilling hole. ) and fixing the tension member 320 of the ground anchor 300 to the semicircular fixing pulley 250 of the guide bracket 200 attached to the upper end of the pile 100, then attaching the tension member 320 to the It is anchored to the top of the pile 100 by the anchor while tension is introduced by applying a predetermined force in the direction of the front of the excavation.

Here, the ground anchor 300 fixed to the head of the pile 100 is changed to a horizontal state on the semicircular fixing pulley 250 of the guide bracket 200 installed on the pile 100.

As a result, it is possible to install the ground anchor 300 to a deep position in the ground G after suppressing the horizontal distance from the pile 100.

Therefore, regardless of the narrowness of the ground (G) site on the rear side of the pile 100, a horizontal force is applied to the head 110 of the pile 100 to prevent the pile 100 from falling into the excavation area of the pile 100. It is possible to install a ground anchor (300).

In addition, in order to connect the ground anchor 300 to the head 110 of the pile 100, the ground anchor 300 is installed on the guide bracket 200 installed on the pile 100, thereby forming the surface of the pile 100. There is no need to expose it.

Therefore, the ground anchor 300 can be installed regardless of before or after excavation is performed in the excavation area.

Additionally, as described above, the ground anchor 300 may be inclined to the opposite side of the pile 100 or may be vertical, or the pile 100 itself may be inclined.

The method of constructing a temporary earth retaining facility using thumb piles using a guide bracket and a ground anchor at the bottom of the bore mirror according to the present invention, which consists of the steps described above, involves drilling the ground (G) to form a hole, and placing a pile (100) in the hole. ) and the ground anchor are combined to form a support body by pouring concrete at the lower end of the borehole, and after fixing the tension member 320 installed on the ground anchor 300 to the guide bracket 200, the tension member 320 By tensioning the pile 100 with a certain tension in the direction of the front of the excavation, not only is there no risk of the pile 100 falling or collapsing into the excavation space even without installing a separate support material on the excavation side, but it is also safe even in narrow spaces in urban areas. Excavation work can be done easily and at low cost.

In addition, the ground anchor 300 is installed at a deeper depth than the pile 100, and the tension member 320 combined with the ground anchor 300 tensions the head 110 of the pile 100 to the outside of the excavation space. This has the advantage of resolving concerns about the pile 100 falling or collapsing into the excavation space.

In addition, since the installation of support materials or strips on the excavation side can be minimized, it is not only easy to secure work space, but also has the advantage of improving workability.

The preferred embodiments described in the detailed description of the present invention are illustrative and not limiting, and the scope of the present invention is indicated by the appended claims, and all modifications that fall within the meaning of the claims are included in the present invention. It is included.

100: pile 110: tofu
120: web 130: flange
200: Guide bracket 210: Reinforcement plate
220: side plate 230: cover plate
240: Bottom plate 250: Semicircular fixed pulley
300: Ground anchor 310: Anchor body
320: Tension member 400: Pile lower end support
G: Ground L: Ground activity line
P: Thumb pile using guide bracket and ground anchor at the bottom of the borescope

Claims (7)

A pile (100) made of a predetermined shape;
A guide bracket 200 coupled to one upper end of the pile 100;
a ground anchor (300) in which one side of the tension member (320) is wound around the guide bracket (200) and the other side is fixed to the support;
The pile 100 is disposed at the top, and the ground anchor 300 is partially embedded in the support body 400 adjacent to the pile 100,
The guide bracket 200 includes a reinforcement plate 210 having a certain thickness and width; A side plate 220 extending at right angles from both ends of the reinforcement plate 210; A cover plate 230 welded to a certain section above the side plate 220; A bottom plate 240 welded to the bottom of the side plate 220; A thumb pile using a guide bracket and a ground anchor at the bottom of the borescope, characterized in that it consists of a semicircular fixing pulley (250) coupled between the upper surface of the bottom plate (240) and the side plate (220). According to paragraph 1,
The pile 100 is a thumb pile using a guide bracket and a ground anchor at the bottom of the borehole, characterized in that it is composed of either a section steel or a steel pipe. delete According to paragraph 1,
The ground anchor 300 includes an anchor body 310 disposed at the bottom, having a constant weight, and having a screw-shaped outer surface; A thumb pile using a guide bracket and a ground anchor at the bottom of the borehole, characterized in that it is composed of a tension member (320) that is embedded in one side of the anchor body (310) and at the same time is pulled to the other side to a certain length. A pile (100) made of a predetermined shape;
A guide bracket 200 coupled to one upper end of the pile 100;
a ground anchor (300) in which one side of the tension member (320) is wound around the guide bracket (200) and the other side is fixed to the support;
The pile 100 is disposed at the top, and the ground anchor 300 is partially embedded in the support body 400 adjacent to the pile 100,
The guide bracket 200 includes a reinforcement plate 210 having a certain thickness and width; A side plate 220 extending at right angles from both ends of the reinforcement plate 210; A cover plate 230 welded to a certain section above the side plate 220; A bottom plate 240 welded to the bottom of the side plate 220; A method of constructing a temporary earth retaining facility using a thumb pile (P) using a guide bracket consisting of a semicircular fixing pulley (250) coupled between the upper surface of the bottom plate (240) and the side plate (220) and a ground anchor at the bottom of the boring mirror. As,
Forming a drill hole by excavating the ground (G) to a certain diameter and depth;
Inserting a thumb pile (P) combining a pile (100) and a ground anchor into the drilling hole;
Forming a support by pouring and curing concrete inside the drill hole so that the ground anchor is partially buried;
Fixing the tension member 310 installed on the ground anchor 300 to the guide bracket 200 of the thumb pile (P) using a guide bracket and a ground anchor at the bottom of the borehole mirror;
A method of constructing a temporary earth retaining facility using thumb piles using a guide bracket and a ground anchor at the bottom of the borehole, characterized in that it consists of the step of tensioning the tension member 310 with a constant tension force at the front of the excavation. According to clause 5,
A method of constructing a temporary earth retaining facility using a thumb pile using a guide bracket and a ground anchor at the bottom of the borehole, characterized in that the ground anchor (300) is installed vertically in the same direction as the pile (100). According to claim 5 or 6,
The ground anchor 300 is installed at a position deeper than the ground action line (L) of the ground (G) on the back side of the pile (100). Earth retention using a thumb pile using a guide bracket and a ground anchor at the bottom of the borehole. Temporary facility construction method.

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