KR20210156637A - Excavation unit for pile pull-out and, pile pull-out method using the same - Google Patents

Abstract

Disclosed are an excavation unit for pulling out a pile, which is useful when pulling out the pile installed on a solid ground (a concrete pile, an H beam, a post, etc.) or slantly embedded in the ground, and a method for pulling out a pile using the prescribed excavation unit. The excavation unit according to an embodiment comprises: a universal joint; and a body in a pipe shape, wherein a socket unit, which is coupled with a lower part of the universal joint, is provided on an upper part thereof and an excavation bite unit is provided on a lower part thereof. The body is configured to excavate the ground while rotating.

Description

An excavation unit for pulling out a pile and a method for pulling out a pile using the same

This disclosure (The Disclosure) relates to by drawing (IPC: E02D 9/02).

Korean Patent Publication No. 10-1787291 discloses a PHC pile drawing apparatus and a PHC pile drawing method using the same.

Referring to the above-mentioned publication, in the prior art, when pulling out a pile installed in the ground (eg, concrete pile, H-beam, pile, etc.) is mounted on a vibro hammer that reciprocates in the vertical direction, ② gradually crushes the ground around the pile to a predetermined depth using the aforementioned crushing unit, and ③ removes the pile from the ground using a crane and a rope. The pulling method has been mainly used.

On the other hand, the aforementioned crushing unit is useful for crushing the soft ground, but has a disadvantage in that it cannot properly crush the hard rock layer. In addition, the above-described crushing unit has a problem that cannot be applied to a pile embedded obliquely in the ground due to its operating principle.

KR 10-1787291 B1 (2017.10.18. Announcement) KR 10-1840640 B1 (2018.03.21. Announcement)

When pulling out a pile installed on a hard ground (eg, concrete pile, H-beam, pile, etc.) or a pile embedded obliquely in the ground, it is to provide an excavation unit for pulling out a useful pile and a pile pulling method using the above-mentioned excavating unit.

The excavation unit according to the embodiment includes a universal joint; and a body in the form of a pipe, provided with a socket portion coupled to the lower portion of the universal joint at the upper portion, and provided with an excavation bite portion at the lower portion, wherein the body is configured to excavate the ground while rotating.

Further, the excavation unit according to the embodiment further includes a fluid injection pipe having one end coupled to the socket portion and the other end facing the lower portion of the body, wherein the universal joint includes: a first cylinder having a yoke portion formed thereon; a second cylinder having a yoke portion formed on an upper portion and a lower portion coupled to the socket portion; a journal connecting the yoke portion of the first cylinder and the yoke portion of the second cylinder; and a tube connecting the inner space of the first cylinder and the inner space of the second cylinder, and an empty space connecting the inner space of the second cylinder and the fluid injection pipe may be formed inside the socket part .

In addition, the excavation bite portion is provided with a plurality of first bite coupled along the outer circumference of the body; A plurality of second bites are provided, each of which has a narrower width than that of the first bite, and is coupled along the outer periphery of the body; and a plurality of third bites coupled along the inner periphery of the body.

A pile extraction method according to an embodiment comprises the steps of mounting an excavation unit according to an embodiment to a driving motor of a driving machine; Excavating the ground around the pile in a vertical direction using an excavation unit; And using a crane, pulling the pile on the ground; includes.

By using the excavation unit according to the embodiment, it is possible to easily withdraw a pile installed on a hard ground or a pile embedded obliquely in the ground.

1 shows a perspective view of an excavation unit according to an embodiment.
2 is a view showing the excavation unit according to the disassembled embodiment from a perspective view.
3 is a cross-sectional view of the excavation unit according to the embodiment cut along the line I-I of FIG.
4 is a view showing the excavation unit according to the embodiment seen from the bottom.
Figure 5 schematically shows a state of excavating the ground around the pile embedded obliquely in the ground using a driving machine equipped with an excavation unit according to the embodiment.
6 shows various coupling types of the fluid injection pipe.
7 shows a modified example of the excavation unit according to the embodiment.

Hereinafter, an excavation unit according to an embodiment and a pile extraction method according to the embodiment will be described in detail with reference to the accompanying drawings.

1 shows a perspective view of the excavation unit 1 (hereinafter referred to as 'excavation unit 1') according to the embodiment, and FIG. 2 is a perspective view of the disassembled excavation unit 1 indicates.

1 to 2 , the excavation unit 1 includes a universal joint 100 and a body 200 .

Referring to FIG. 4 , the universal joint 100 connects the driving motor B of the driving machine A and the body 200 so that the body 200 can be inclined at a certain angle according to the inclination of the pile P. do. That is, the universal joint 100 is such that the body 200 is parallel to the pile (P).

A plurality of universal joints 100 are provided, and when they are combined in a vertical direction, the body 200 may be inclined in a multiaxial direction with respect to the driving motor B. For example, when two universal joints 200 are coupled in a vertical direction, the body 200 may be inclined in the 8-axis direction.

Referring back to FIGS. 1 and 2 , the body 200 is configured in the form of a pipe having a large inner diameter compared to the diameter of the file to be removed. A socket unit 210 coupled to the universal joint 100 is provided at an upper portion of the body 200 , and an excavation bite unit 220 is provided at a lower portion of the body 200 .

The body 200 rotates by an external power source and functions to excavate the ground around the pile. The body 200 may be configured to be expandable in the longitudinal direction.

On the other hand, the excavation unit 1 may further include at least one fluid injection pipe 300 that receives a fluid (eg, water, air, etc.) from the outside and sprays it downward of the body 200 . The aforementioned fluid acts to lubricate and push the excavated soil out of the ground.

2 to 3 , the fluid injection pipe 300 has a predetermined length, one end is coupled to the socket unit 210 , and the other end may be located under the body 200 . At this time, the universal joint 100 includes a first cylinder 110 having a yoke part 111 formed at the lower portion, and a second cylinder 120 having a yoke portion 121 formed on the upper portion and coupled with the socket portion 210 at the lower portion. ) and the journal 130 interconnecting the two yoke parts 111 and 121 and interconnecting the internal space 112 of the first cylinder 110 and the internal space 122 of the second cylinder 120 is composed of a tube 140 , and an empty space 211 connecting the inner space 122 of the second cylinder 120 and the fluid injection pipe 300 is formed inside the socket part 210 .

That is, the fluid supplied from the fluid supplier (not shown) is the inner space 112 of the first cylinder 110 → the tube 140 → the inner space 122 of the second cylinder 120 → the socket part 210 of the Via the empty space 211, it is injected in the ground direction through the fluid injection pipe 300.

As shown in Fig. 6 (a), the fluid injection pipe 300 may be provided on the outer surface of the body 200, and as shown in Fig. 6 (b), the fluid injection pipe 300 is the body It may be provided on the inner surface of the 200 .

In addition, as shown in FIG. 6 ( c ), the fluid injection pipe 300 is provided inside the body 200 , and may vertically communicate with the empty space 211 of the socket part 210 .

1 and 4, the excavation byte unit 220 is a plurality of first bytes (221, 221', 221"), a plurality of second bytes (222, 222', 222") and a plurality of third It may consist of bytes 223, 223', 223".

A plurality of first bites (221, 221', 221") are coupled along the outer circumference of the body 200, and function to substantially excavate the ground.

The plurality of second bites 222 , 222 ′, 222″ each have a narrower width than that of the first bite 221 , and are coupled along the periphery of the outer surface of the body 200 . The plurality of second bytes (222, 222', 222") functions to agitate the soil excavated in the first bite 221 with the fluid.

A plurality of third bites (223, 223', 223") are coupled along the inner periphery of the body 200. The plurality of third bites 223, 223', 223" is for crushing the ground around the pile. function.

The second byte 222 and the third byte 223 may be integrally configured, and in this case, the integrally configured second byte 222 and the third byte 223 have the same width as the first byte 221 . can be

In addition, referring to FIG. 7 , the excavation unit 1 may further include a bearing 400 installed inside the body 200 via a plurality of ribs 410 and 410 ′. The inner diameter of the bearing 400 corresponds to the diameter of the pile to be drawn out. The bearing 400 guides the body 200 to be inclined at the same angle as the pile P.

If the excavation unit described above is used, there is an effect that it is possible to easily pull out a pile installed in a hard ground or a pile stuck in the ground at an angle.

A method of extracting a file according to an embodiment will be described with reference to FIG. 5 .

First, the excavation unit (1) is mounted on the driving motor (B) of the driving machine (A).

Subsequently, the ground around the pile (P) is excavated in the vertical direction by the excavation unit (1). At this time, the body 200 of the excavation unit 1 is coupled to the drive motor B via the universal joint 100, and the pile P follows the pile P even if it is obliquely embedded in the ground, Effectively excavate the ground around the pile (P).

Then, the pile (P) is pulled over the excavated ground by a crane (not shown).

Various expressions (terms, visualized images, etc.) used when describing an embodiment of the present disclosure (The Disclosure) are merely selected for the purpose of a tool to increase understanding of the technology.

In addition, due to circumstances, the present disclosure has been described by way of a limited number of embodiments, and those skilled in the art (those with ordinary skill in the art) can implement new implementations within the scope not departing from the technical spirit of the present disclosure based on the described embodiments. You can come up with examples.

Accordingly, the claims of the present disclosure should not be limited by some expressions shown in the 'description of the invention' and 'drawings', but should be interpreted broadly based on the original technical idea contained throughout the specification.

1.... excavation unit
--
100... universal joint
110... first cylinder
111... Yorkbu
112... interior space
120... 2nd cylinder
121... Yorkbu
122... interior space
130... Journal
140... tube
--
200... body
210... socket part
211... empty space
220... Excavation bite part
221, 221', 221"... 1st byte
222, 222', 222"... 2nd byte
223, 223', 223"... 3rd byte
--
300... fluid injection pipe
--
400... bearing
410, 410'...rib
--
A... Driving / B... Driving motor / P... File

Claims (5)

Universal joint; and
In the form of a pipe, a socket portion coupled to the lower portion of the universal joint is provided at an upper portion, and a body provided with an excavation bite portion at the lower portion; includes,
Excavation unit, characterized in that the body is configured to excavate the ground while rotating.
According to claim 1,
One end is coupled to the socket portion, the other end of the fluid injection pipe toward the lower portion of the body; further comprising,
The universal joint is
a first cylinder in which a yoke portion is formed at a lower portion;
a second cylinder having a yoke portion formed on an upper portion and a lower portion coupled to the socket portion;
a journal connecting the yoke portion of the first cylinder and the yoke portion of the second cylinder; and
Consists of; a tube connecting the inner space of the first cylinder and the inner space of the second cylinder;
Excavation unit, characterized in that an empty space connecting the inner space of the second cylinder and the fluid injection pipe is formed inside the socket part.
According to claim 1,
The excavation byte part,
A plurality of first bites are provided, coupled along the outer circumference of the body;
A plurality of second bites are provided, each of which has a narrower width than that of the first bite, and is coupled along the outer periphery of the body; and
A plurality of third bites are provided and are coupled along the inner circumference of the body; Containing, excavation unit.
According to claim 1,
A plurality of ribs as a medium, a bearing installed in the interior of the body; further comprising, an excavation unit.
As a method of pulling out a file installed in the ground,
Mounting the excavation unit of any one of claims 1 to 4 to the driving motor of the driving machine;
Excavating the ground around the pile in a vertical direction using an excavation unit; and
Using a crane, pulling the pile onto the ground; including; a pile extraction method.

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