KR102514988B1 - Pile construction device and method using earth anchor - Google Patents

Abstract

A pile construction device and method using a ground anchor are disclosed. A pile construction method using a local anchor according to the present invention includes (a) drilling an earth anchor hole 14 at a predetermined location in the ground, inserting a tension member 12 into the drilled earth anchor hole 14, Installing the ground anchor 10, and (c) passing the tension member 12 through the tension member through hole in the pile 20 having the tension member through hole formed in the central portion in the longitudinal direction, and the upper end of the pile 20 After installing the hydraulic jack 30 to the hydraulic jack 30, the tension member 12 of the hydraulic jack 30 includes the step of pushing the pile 20 into the ground. According to the present invention, there is an effect that can be constructed while minimizing noise and vibration of medium-large piles capable of supporting large loads even in workplaces with vertical or horizontal space limitations.

Description

Pile construction device and method using earth anchor {PILE CONSTRUCTION DEVICE AND METHOD USING EARTH ANCHOR}

The present invention relates to a device and method for constructing a pile using an earth anchor.

The depth and size of underground structures are gradually increasing in buildings constructed in downtown areas due to high land prices and securing parking spaces, and accordingly, the importance of large-scale ground excavation and earth retaining structures is increasing. use is essential.

Methods for constructing piles that transmit the upper load to the lower ground usually include a driving method and an insertion method after drilling. However, the driving method in which the pile is driven by hitting the ground with a free-falling heavy hammer has a problem with noise and vibration, so a method of inserting the pile after drilling the ground with a perforator such as a drill is mainly used. However, the insertion method after drilling also still has a problem with noise in order to drill medium and large piles, and the existing method requires a large work space due to the large size of the facility for driving or drilling.

In particular, buildings constructed in urban areas have many vertical or horizontal space restrictions, and the seriousness of the above problems is further increased due to high population density.

Registered Patent Publication No. 10-1928054 (registered on December 5, 2018)

The present invention was devised in view of the above points, and it is possible to construct medium-large piles capable of supporting large loads even in workplaces with vertical or horizontal space restrictions by minimizing noise and vibration. Using an earth anchor Its purpose is to provide a pile construction device and method.

A pile construction apparatus using a ground anchor according to the present invention for achieving the above object includes an earth anchor 10 having a tension member 12 inserted into the ground in which an earth anchor hole 14 is formed; A pile 20 having a tension member through hole formed in the central portion in the longitudinal direction for the tension member 12 to pass through and press-fitting into the ground; And, a hydraulic jack 30 connected to the upper end of the pile 20 to press the pile 20 into the ground while tensioning the tension member 12.

The pile 20 includes a leader pile 22 that is first pushed into the ground and a general pile 24 installed on the leader pile 24, and the front end 22a of the leader pile 22 is lowered. It is formed pointedly so that the width becomes smaller as it goes.

In the tensile member 12, a fracture groove 12a having a relatively smaller width than other portions may be formed at a predetermined position, and when a predetermined tensile force is applied by the hydraulic jack 30, tensile fracture occurs in the fracture groove 12a. It happens.

A pressure gauge 32 capable of measuring the tension of the tension member may be installed in the hydraulic jack 30.

The pile 20 may have, for example, a prismatic structure in cross section. A plurality of prismatic piles 20 are installed in the ground so that they are adjacent to each other, and the coupling protrusion 27 is formed to protrude from one side. A coupling groove 29 into which the coupling protrusion 27 is inserted may be formed on the other side facing the one side surface.

As another example, the pile 20 may have a prismatic structure in cross section. A plurality of prismatic piles 20 are installed in the ground so that they are adjacent to each other, but the coupling protrusions 27 protrude from both sides facing each other. Male piles 26 and female piles 28 in which coupling grooves 29 into which the coupling protrusions 27 are fitted are formed on both sides facing each other may be installed to cross each other.

Meanwhile, a pile construction method using a ground anchor according to the present invention for achieving the above object includes: (a) drilling an earth anchor hole 14 at a predetermined location in the ground; (b) installing a ground anchor 10 by inserting a tension member 12 into the drilled ground anchor hole 14; And, (c) passing the tension member 12 through the tension member through hole in the pile 20 having a tension member through hole formed in the central portion in the longitudinal direction, and installing the hydraulic jack 30 at the top of the pile 20, and then A hydraulic jack 30 presses the pile 20 into the ground while tensioning the tension member 12; includes.

According to the present invention, since an earth anchor hole having a small width and diameter is drilled and the pile is pressed by a hydraulic jack using the tensile force of the tension member, only a small drilling machine and equipment consisting of several hydraulic jacks are required. Its scale is much smaller than that of the equipment. Therefore, even in a workplace with vertical or horizontal space restrictions, there is an effect of constructing medium-large piles capable of supporting large loads while minimizing noise and vibration.

In addition, since a plurality of piles can be simultaneously constructed using a plurality of hydraulic jacks, there is an effect of reducing working time.

1 is a view showing a pile construction device using a ground anchor according to a preferred embodiment of the present invention;
2 is an enlarged view of part A of FIG. 1;
Figure 3 is a view showing another embodiment of the pile of Figure 1, Figure 3a is a front cross-sectional view of a state in which a plurality of piles are connected, Figures 3b and 3c are cross-sectional views of the pile,
4 is an enlarged view of part B of FIG. 1;
5 is a view showing a pile construction method using a local anchor according to a preferred embodiment of the present invention;
6 is a view showing a state in which the pile construction device of FIG. 1 is applied where the ground is inclined.

The above objects, features and other advantages of the present invention will become more apparent by describing preferred embodiments of the present invention in detail with reference to the accompanying drawings. Hereinafter, a pile construction device and method using an earth anchor according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 1, the pile construction device using the earth anchor according to an embodiment of the present invention includes an earth anchor 10 having a tension member 12, a pile 20, and a hydraulic jack 30 for pressing the pile includes

The earth anchor has a tension member 12 and the tension member 12 is inserted into the earth anchor hole 14 (see FIG. 5) formed in the ground. As is well known, the earth anchor 10 forms an earth anchor hole 14 in the ground with a separate puncher, inserts a tensile material such as a PC steel bar or a PC steel wire into it, and then stops around it with injection such as mortar If so, this injection material hardens and becomes an earth anchor body.

The pile 20 has a tension member through hole formed in the longitudinal direction for the tension member 12 to pass through in the central portion. After installing the earth anchor 10, the tension member 12 of the earth anchor exposed to the ground is passed through the tension member through hole, and then the pile 20 is pushed into the ground by a hydraulic jack 30 to be described later.

As the pile 20, a commonly known pile may be applied. For example, as the material and structure of the pile 20, generally widely used steel pipe piles, concrete piles such as RC, PSC, or PHC, synthetic piles obtained by combining concrete piles with SC or steel pipes may be used.

The pile 20 is provided with two types of leader piles 22, which are first pushed into the ground, and general piles 24 installed on the leader piles 22. The general pile 24 has a structure in which the width is equal in the longitudinal direction. On the other hand, referring to FIG. 2, the front end 22a of the leader pile 22 has a pointed structure such that the width decreases toward the bottom. Therefore, it is possible to more easily drive the pile into the ground by the leader pile 22 having the above structure, and also to accurately insert the pile into the desired position along the pre-installed tension member 12.

The pile 20 may have a cylindrical structure with a circular cross section or a prismatic structure with a polygonal cross section. Therefore, the tension material through hole is formed in the center of the pile 20, the body of the pile 20 is formed on the outside, and a certain space is formed between the tension material through hole and the body, and a filler such as cement or mortar is formed in this space. Injected.

Meanwhile, as shown in FIG. 3A, a plurality of piles 20 may be installed adjacently to form a retaining wall or a retaining wall. In this case, the piles 20 may be of a prismatic structure. Here, the prismatic pile 20 may be installed adjacent to each other by forming, for example, a coupling protrusion 27 on one side and a coupling groove 29 on the other side, as shown in FIG. 3B. In addition, the prismatic pile 20 is a male pile 28 formed so that the engaging protrusion 27 protrudes on both sides facing as another example, as shown in FIG. 29) may be installed to cross each other.

Referring back to FIG. 1, the hydraulic jack 30 is connected to the top of the pile 20 to press the pile 20 into the ground while tensioning the tension member 12. That is, the hydraulic jack 30 presses the pile 20 using hydraulic pressure in a state in which the tension member 12 is tensioned. On the other hand, a pressure gauge 32 capable of measuring the tensile force of the tension member is installed in the hydraulic jack 30. In this way, since the hydraulic jack 30 presses in the pile using the tensile force of the tension member 12, the load used when the pile is pulled in is already measured and known, and the load becomes the bearing capacity of the pile, so there is no need to separately measure the bearing capacity .

On the other hand, the hydraulic jack 30 may be installed on each of the plurality of piles (20). Therefore, the conventional pile construction method can only construct one pile, but according to the present invention, it is possible to simultaneously construct a plurality of piles.

Referring to Figure 4. A fracture groove 12a having a relatively smaller width than other portions may be formed at a certain position of the tension member 12 of the earth anchor 10. Therefore, when a certain tensile force is applied by the hydraulic jack 30, tensile fracture occurs in the fracture groove 12a. That is, when a pile is inserted using the tensile force of the tension member 12, when a plurality of piles are driven in by the tensile force and reach a predetermined load (bearing force), the tension member is broken in the fracture groove 12a, and thus the pile is a follower. Piles pulled into the ground can obtain a predetermined bearing capacity without the need to unnecessarily pull them in.

Hereinafter, with reference to FIG. 5, a pile construction method using an earth anchor by a pile construction device using an earth anchor having the above structure will be described.

First, as shown in (a) of FIG. 5, the earth anchor hole 14 is drilled at a predetermined position using a puncher.

After that, as shown in (b) of FIG. 5, the tension member 12 is inserted into the drilled earth anchor hole 14 and the earth anchor 10 is installed.

After that, as shown in (c) of FIG. 5, pass the tension member 12 exposed on the ground through the tension member penetration hole of the pile 20, install the hydraulic jack 30 at the top of the pile 20, and then the hydraulic jack ( The pile 20 is pushed into the ground using the tensile force of the tension member of 30).

Usually, a clamp is installed on the hydraulic jack 30, and the hydraulic jack 30 is connected to the top of the pile 20 using the clamp. Then, as shown, the leader pile 22 is first pressed into the ground among the piles, and the general pile 24 is sequentially pressed thereon. After the leader pile is first pressed in, the hydraulic jack 30 connected to the top of the leader pile is removed, and then the hydraulic jack is connected to the general pile again and pressed in, and the same process is repeated to sequentially press in the general pile.

Then, as shown in (d) of FIG. 5, when the pressing of the pile 20 is completed, the hydraulic jack 30 connected to the top of the last general pile is removed, and finally, as shown in (e) of FIG. 5, the pile 20 After injecting the filler 40 into the inside, a grouting operation is performed to solidify the construction to finish the construction.

As described above, according to the present invention, since an earth anchor is installed by drilling a small diameter earth anchor hole and the pile is pressed by a hydraulic jack using the tensile force of the tension member, it is possible to drill a medium or large pile in the conventional drilling and insertion method Equipment used in the existing construction method as it does not require a large drilling machine for driving, and does not require a large pile driver to drive medium-large piles in the existing driving method, and requires only equipment consisting of a small drilling machine and several hydraulic jacks. is much smaller than that of Therefore, there is an advantage in constructing medium-large piles capable of supporting large loads in a workplace with vertical or horizontal space limitations while minimizing noise and vibration.

In addition, since a plurality of piles can be constructed simultaneously using a plurality of hydraulic jacks, there is an advantage in that the working time can be significantly reduced compared to constructing only one pile in the existing method.

In addition, since a pressure gauge is installed on the hydraulic jack to measure the tensile force of the tension member when the pile is pulled in, the load used when the pile is pulled in is already measured and known, and the load becomes the bearing capacity of the pile, so a separate bearing capacity measurement is not required.

Although preferred embodiments of the present invention have been described above, the present invention is not limited to the specific embodiments described above. That is, those skilled in the art to which the present invention pertains can make many changes and modifications to the present invention without departing from the spirit and scope of the appended claims, and all such appropriate changes and modifications Equivalents should also be considered as falling within the scope of this invention.

10. Earth anchor 12. Tension member
14. Earth anchor hole 20. Stake
22. Leader stake 22a. distal end
24. General piles 26. Male piles
27. Coupling protrusion 28. Female pile
29. Coupling groove 30. Hydraulic jack

Claims (7)

An earth anchor 10 having a tension member 12 inserted into the ground in which the earth anchor hole 14 is formed;
A pile 20 having a tension member through hole formed in the central portion in the longitudinal direction for the tension member 12 to pass through and press-fitting into the ground; and,
A hydraulic jack 30 connected to the upper end of the pile 20 to press the pile 20 into the ground while tensioning the tension member 12;
The tensile member 12 has a fracture groove 12a having a relatively smaller width than other parts, which is formed at a predetermined position, and when a predetermined tensile force is applied by the hydraulic jack 30, tensile fracture occurs in the fracture groove 12a. A pile construction device using a characterized earth anchor.
According to claim 1,
The pile 20 includes a leader pile 22 that is first pushed into the ground and a general pile 24 installed on the leader pile 22,
Pile construction device using an earth anchor, characterized in that the front end (22a) of the leader pile (22) is formed pointedly so that the width decreases toward the bottom.
delete According to claim 1,
A pile construction device using an earth anchor, characterized in that a pressure gauge 32 capable of measuring the tensile force of the tension member is installed on the hydraulic jack 30.
According to claim 1,
The pile 20 has a rectangular structure in its cross section,
A plurality of piles 20 of the angular structure are installed in the ground so that they are adjacent to each other, and the coupling protrusion 27 is formed to protrude on one side, and the coupling protrusion 27 is fitted to the other side facing the one side Pile construction device using an earth anchor, characterized in that the coupling groove 29 is formed.
According to claim 1,
The pile 20 has a rectangular structure in its cross section,
A plurality of piles 20 of the angular structure are installed in the ground so that they are adjacent to each other, and male piles 28 formed so that coupling protrusions 27 protrude on both sides facing each other, and the coupling protrusions 27 on both sides facing each other Pile construction device using an earth anchor, characterized in that the female piles 26 in which the coupling grooves 29 are inserted are installed to cross each other.
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