KR20170002355A - Drawing apparatus for phc pile and drawing method for for phc pile thereof - Google Patents

Abstract

The present invention relates to a method of drawing a PHC pile. A pile casing member has a shape penetrated up and down; a PHC pile is inserted into the pile casing member; the pile casing member is provided with a water injection device which injects high-pressure water to a lower end thereof; a pile gripping rope body is inserted into the pile casing member, and is connected to a crane rope hook; the pile casing member is mounted on a crane vibro-hammer; the crane rope hook is inserted into the casing to connect the pile gripping rope body; the PHC pile is surrounded and fixated by the pile gripping rope body; the ground is dug by the pile casing member while injecting the lower end of the pile casing member by the water injection device in a state where the PHC pile is inserted into the pile casing member; and the PHC pile is drawn by pulling the pile gripping rope body. Accordingly, a convenience of a drawing removal work of the PHC pile is drastically improved; it is possible to completely remove the PHC pile from the ground with minimal equipment; construction costs are drastically reduced by estimating proper construction costs; and site utilization is maximized. According to the present invention, accidents are prevented from occurring at a time of drawing and removing the PHC pile to drastically improve safety during drawing work of the PHC pile.

Description

TECHNICAL FIELD [0001] The present invention relates to a PHC file extraction device and a PHC file extraction method using the PHC file extraction device,

The present invention relates to a PHC file retrieval apparatus and a PHC file retrieval method using the same, and more particularly, to a PHC file retrieval apparatus and a PHC file retrieval method using the same, .

In general, when a building or structure is constructed, foundation work is carried out to reinforce the ground in order to support the structure according to the condition of the ground or the load of the structure.

For this purpose, a PHC file (Pretensioned spun High Strength Concrete Pile) is widely used. The PHC file is a pretensioned high strength pile with a concrete compression strength of 78.5 N / (800 Kgf / It has an advantage that it has better bearing capacity in axial direction than file, strong against impact, and large in bending strength.

The PHC file is extracted and removed from the ground after the building is completed.

The pulling operation of the PHC file is performed by punching the ground with Auger close to the P normal PHC file, and shaking the PHC file to the left and right to disturb the ground and then pulling it out.

However, when the ground is pierced by auger as described above and the PHC file is shaken to disturb the ground, the PHC file is shaken during pulling operation, so that only the uppermost portion of the PHC file is easily pulled out. There was a problem that the lower part of the medium wave in the file was not easy to pull out.

In particular, the lower part of the PHC file is deeply buried in the ground, so that the soil attached to the outer surface is completely integrated with the ground, and the bulb is larger than the original shape. Therefore, there is a great difficulty in pulling out, There is a problem that the work is troublesome and the work time is long.

Domestic Utility Model Registration No. 0386859 'Sheet File Indentation and Drawing Device' (registered on June 23, 2005)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a PHC file pulling apparatus that can pull out a PHC file easily and securely without a medium wave during pulling, and a PHC file pulling method using the same.

According to an aspect of the present invention, there is provided a method of extracting a PHC file embedded in a ground, the method comprising: inserting a PHC file into the PHC file, To prepare a rope body for preparing a rope body for pile holding inserted into the pile casing member and connected to the crane rope ring;

A first file preparing step of mounting the pile casing member to a vibro hammer of a crane and inserting a crane rope loop into the casing;

Preparing a file drawing second rope body for connecting the rope body for file holding to the crane rope ring after the drawing preparing step;

A third file preparing step of wrapping and fixing the PHC file with the rope for file holding;

A casing pressing step of inserting the PHC file into the inside of the pile casing member and pumping the pile casing member to the ground while spraying water to the lower end of the pile casing member with the water injection device;

A PHC file retrieving step of retrieving the PHC file by pulling up the file holding rope body after the casing panning step; And

The file casing member pulled out from the ground is moved to a PHC file to be drawn next, and repeating the drawing operation of the PHC file.

In the present invention, the rope body for holding a file has a ring shape in which both ends of the rope body are folded so that a plurality of wires of a two-line shape are wound to wind the PHC pile and pass between the two- And the third file preparing step includes a step of pulling a crane rope loop on the other end side of the wire body to reduce the diameter of the wire body so that the wire body winds and fixes the PHC file .

The casing pumping step may pivot the pile casing member to the pulling depth of the PHC file using the vibro hammer.

In the present invention, the PHC file pulling step may pull out the PHC file by pulling the rope body for holding the file while the pile hammer holds the pile casing member.

In the present invention, the PHC file pulling step may further include: a further pivoting step of further pumping the pile casing member so that the pile casing member is put on the ground; Pulling out the PHC file by pulling the rope for holding a file in a state that the vibro hammer grasps the pile casing member; Releasing the holding state of the pile casing member from the vibro hammer and pulling the rope body for holding the pile while the pile casing member is placed on the ground to separate the PHC pile from the pile casing member and moving the pile casing member; And inserting the crane rope loop into the pile casing member and grasping the pile casing member with the vibro hammer.

The present invention greatly improves the convenience of the pull-out work of the PHC file, so that the PHC file can be completely removed from the ground with a minimum of equipment, thereby estimating an appropriate construction cost, greatly reducing the construction cost, and maximizing utilization of the site.

The present invention has the effect of preventing the occurrence of an accident when pulling out the PHC file, thereby greatly improving the safety during the pulling operation of the PHC file.

The present invention is capable of removing a PHC file which is used for a structure such as an aged building or a bridge in the future and can not be removed from the ground, thereby setting a foundation method suitable for a new environment.

1 is a perspective view showing a PHC file pulling apparatus according to the present invention;
2 is a cross-sectional view showing a pile casing member of the PHC file pulling apparatus according to the present invention;
3 is a perspective view showing a rope body for file holding in the PHC file pulling apparatus according to the present invention.
4 is a schematic view showing one embodiment of a file casing member in a PHC file pulling apparatus according to the present invention;
5 is a flowchart showing a PHC file pulling method according to the present invention
6 is a perspective view showing an example of wrapping and fixing a PHC file with a rope for file holding in the PHC file pull-
Fig. 7 is a schematic view showing the casing pumping step in the PHC file pulling method according to the present invention

The present invention will now be described in detail with reference to the accompanying drawings. Hereinafter, a repeated description, a known function that may obscure the gist of the present invention, and a detailed description of the configuration will be omitted. Embodiments of the present invention are provided to more fully describe the present invention to those skilled in the art. Accordingly, the shapes and sizes of the elements in the drawings and the like can be exaggerated for clarity.

FIG. 1 is a perspective view showing a PHC file withdrawing apparatus according to the present invention, and FIG. 2 is a sectional view showing a file casing member 10 of a PHC file withdrawing apparatus according to the present invention.

Referring to Figs. 1 and 2, a PHC file pulling apparatus according to the present invention includes a pile casing member 10 mounted on a vibro hammer 2 of a crane 1.

The pile casing member 10 is formed in a hollow shape having an upwardly and downwardly penetrating shape, and the PHC pile 3 can be inserted therein, and is formed into a cylindrical shape.

The pile casing member 10 is preferably provided with a ring bite portion at its lower end so that the rock in the ground can be crushed to be pushed and press-fit.

It is preferable that the pile casing member 10 is provided with a double casing portion 12 having a ring byte 11 mounted thereon and formed of a two-layered steel plate. The double casing portion 12 is reinforced to withstand a load generated when the ring portion 11 is pivoted by the ring bit portion 11, 10 from being deformed and broken.

A water jetting device 20 for jetting high-pressure water toward the lower end of the pile casing member 10 is mounted on the pile casing member 10.

The water injection device 20 injects water of a high pressure enough to dispose of the ground, and it is possible to control the injection pressure of the water so as to smoothly push the ground according to the ground.

The water injection device 20 includes a water supply header portion 21 mounted on the outside of the pile casing member 10 at an upper side of the pile casing member 10 and connected to the water supply portion 20a;

An upper end portion is connected to the water supply header portion 21 and a lower end portion extends to a lower portion of the pile casing member 10 and penetrates into the pile casing member 10 from the lower side of the pile casing member 10 A plurality of water supply pipe portions 22 to be inserted; And

And a spray nozzle 23 connected to a lower end of the water supply pipe 22 in the pile casing member 10 and spraying water toward the lower end of the pile casing member 10. [

The injection nozzles 23 are mounted on the inner surface of the pile casing member 10 and two or three are provided on the inner peripheral surface of the pile casing member 10.

A file holding rope body 30 connected to the crane rope loop 1a is inserted into the inside of the pile casing member 10 and the rope body 30 for holding the pile is inserted into the inside of the pile casing member 10 And the PHC file 3 is enclosed and fixed.

3 is a perspective view showing a rope body 30 for holding a file in the PHC file pulling apparatus according to the present invention. Referring to FIG. 3, the rope body 30 for holding a file is folded at both ends, And a wire body (31) having a ring shape in which a plurality of wires are wound so as to wind the PHC file (3) and passing between the two-wire wires of the other end side folded at one end, 31) of the fixed wire member (32).

When the crane rope loop (1a) is hooked on the other end side of the folded wire body (31), the diameter of the crane loop ring (1a) is reduced and the PHC pile (3) is wound and fixed.

The crane rope loop 1a is known as a ring used in a conventional crane 1, and a detailed description thereof is omitted.

FIG. 4 is a schematic view showing an embodiment of the file casing member 10 in the PHC file pulling apparatus according to the present invention. Referring to FIG. 4, the PHC file pulling apparatus according to the present invention includes: And a casing supporting wire member (40) connecting the pile casing member (10).

Both ends of the casing supporting wire member 40 are respectively connected to the vibro hammer 2 and the pile casing member 10 so that the pile casing member 10 is not damaged or malfunctioned When the pile casing member 10 is detached from the vibro hammer 2 by the vibro hammer 2, the vibro hammer 2 is prevented from dropping.

For example, when an accident occurs that the hydraulic hose of the vibro hammer 2 is blown into the vibro hammer 2, the pile casing member 10 is separated from the vibro hammer 2 by its own weight, This can lead to a major accident.

The casing supporting wire member 40 is connected to the vibro hammer 2 to prevent the vibro hammer 2 from dropping even if the vibro hammer 2 can not grip the pile casing member 10 during transportation, Thereby preventing a large accident caused by the falling of the casing member 10 during transportation.

The pile casing member 10 is provided with a first wire claw portion 13 to which the casing supporting wire member 40 is connected and the other end of the casing supporting wire member 40 is connected to the vibro hammer 2, And the casing supporting wire member 40 is separated from the first wire claw portion 13 and the second wire claw portion 2a by at least one of the first wire claw portion 13 and the second wire claw portion 2a, So that the pile casing member 10 can be completely separated from the vibro hammer 2.

5 illustrates a method of extracting a PHC file according to an embodiment of the present invention, which extracts a PHC file embedded in the ground using the PHC file extraction apparatus according to the present invention, (10) in which a water injection device (20) for injecting high-pressure water into the PHC pile (3) is inserted into the inside of the pile casing member (10) A casing and a rope body preparing step (S100) for preparing a rope body (30) for pile holding connected to a crane rope loop (1a); A file drawing preparation step S200 for mounting the pile casing member 10 to the vibro hammer 2 of the crane 1 and inserting the crane rope loop 1a into the pile casing member 10, ); A second file preparation step (S300) of connecting the rope body (30) for file holding to the crane rope loop (1a) after the drawing preparation step; A third file preparation step (S400) of wrapping and fixing the PHC file (3) with the rope for file holding; The PHC file 3 is inserted into the inside of the pile casing member 10 and water is sprayed to the lower end portion of the pile casing member 10 by the water injection device 20, (S500); And extracting a PHC file (S600) for pulling out the PHC file (3) by pulling the rope body (30) for file holding after the casing panning step (S500).

The casing and the rope body preparing step S100 are carried out by inserting the pile casing member 10 in which the water injection device 20 is mounted and the pile casing member 10 into the crane rope loop 1a The embodiments of the pile casing member 10, the water injection device 20 and the pile rope 30 for pile-holding are prepared as described above, It is clear that omission is omitted.

6, the file extraction preparation step S200, the file extraction preparation step S300, and the file extraction preparation step S400 are continuously performed. Referring to FIG. 6, If the crane rope loop 1a is hooked on the other folded end side of the wire main body 31 in step S400, the diameter of the wire main body 31 is reduced, Is wound and fixed.

7, the injection nozzle 23 of the water injection device 20 is connected to the outer peripheral surface of the PHC pile 3 inserted into the pile casing member 10, The ground is pushed by the pile casing member 10 while separating the PHC pile 3 from the ground.

The casing pumping step S500 may be performed by pivoting the pile casing member 10 to the pulling depth of the PHC pile 3 using the vibro hammer 2, The PHC file 3 has a depth up to the lower end of the PHC file 3 and is a depth at which the PHC file 3 can be drawn out from the ground.

The PHC file extraction step S600 pulls out the PHC file 3 by pulling the file holding rope body 30 in a state where the pile casing member 10 is held by the vibro hammer 2 .

This prevents an accident that the crane 1 is turned on by a repulsive force when an accident occurs in which the file-holding rope body 30 is broken when pulling out the PHC file 3 by pulling the rope body 30 for holding a file It is for this reason.

The PHC file extraction step S600 is a step of extracting the PHC file 3 by pulling the rope body 30 for holding a file in a state where the pile hammers 2 grasp the pile casing member 10 It is possible to minimize the repulsive force at the time of fracture of the file holding rope body 30 and to prevent the crane 1 from being turned.

The PHC file retrieval step S600 may move the file casing member 10 together with the retrieved PHC file 3.

In addition, the step of extracting the PHC file (S600) further includes a further pouring step of further piercing the pile casing member 10 so that the pile casing member 10 is put on the ground;

Pulling out the PHC file (3) by pulling the rope body (30) for holding a file with the vibro hammer (2) held by the pile casing member (10);

The gripping state of the pile casing member 10 is released from the vibro hammer 2 and the pile rope body 30 is pulled out while the pile casing member 10 is placed on the ground, ) From the pile casing member (10); And

And inserting the crane rope loop 1a into the pile casing member 10 and grasping and holding the pile casing member 10 with the vibro hammer 2.

The pile casing member 10 pulled out from the ground is moved to the next PHC file 3 to be pulled out of the PHC file 3.

The present invention greatly improves the convenience of the pull-out work of the PHC file (3) so that the PHC file (3) can be completely removed from the ground with a minimum of equipment, thereby estimating an appropriate construction cost, greatly reducing the construction cost and maximizing site utilization .

The present invention prevents the occurrence of an accident at the time of pulling-out of the PHC file (3), thereby greatly improving the safety during the drawing operation of the PHC file (3).

The present invention can remove the PHC file (3) which is used for the aged buildings or bridges such as structures and can not be removed from the ground, so that the foundation method suitable for the new environment can be set.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is evident that many alternatives, modifications, and variations will be apparent to those skilled in the art in light of the above teachings. will be.

1: Crane 1a: Crane rope loop
2: Vibro hammer 2a: Second wire loop part
10: a file casing member 11: a ring-
12: double casing part 13: first wire loop part
20: water injection device 20a: water supply part
21: water supply header part 22: water supply tube
23: injection nozzle 30: rope body for holding a file
31: wire body 32: fixed wire member
40: casing supporting wire member

Claims (5)

The present invention relates to a method for drawing a PHC file embedded in a ground, comprising a pile casing member having a water injection device for inserting a PHC pile into the pile and spraying high pressure water toward a lower end, A casing and a rope body preparing step of preparing a rope body inserted into the casing member and connected to the crane rope loop;
A first file preparing step of mounting the pile casing member to a vibro hammer of a crane and inserting a crane rope loop into the casing;
Preparing a file drawing second rope body for connecting the rope body for file holding to the crane rope ring after the drawing preparing step;
A third file preparing step of wrapping and fixing the PHC file with the rope for file holding;
A casing pressing step of inserting the PHC file into the inside of the pile casing member and pumping the pile casing member to the ground while spraying water to the lower end of the pile casing member with the water injection device;
A PHC file retrieving step of retrieving the PHC file by pulling up the file holding rope body after the casing panning step; And
The file casing member pulled out from the ground is moved to a next PHC file to be pulled out and repeatedly pulled out of the PHC file;
Gt; PHC < / RTI > file. The method according to claim 1,
Wherein the rope body for holding a file includes a wire body having a ring shape in which both ends are folded so that a plurality of wires of a two-line form are wound to wind the PHC pile, and the one end side of the wire body passes between the two- ≪ / RTI &
Wherein the PHC file is formed by winding the crane rope loop on the other end side of the wire body so that the diameter of the wire body becomes smaller, Drawing method. The method according to claim 1,
Wherein the casing pumping step uses the vibro hammer to pivot the pile casing member to the pull depth of the PHC file. The method according to claim 1,
Wherein the PHC file pulling step pulls out the PHC file by pulling the rope body for holding a file while the vibro hammer grasps the pile casing member. The method according to claim 1,
The PHC file extracting step includes:
Further pivoting the pile casing member to further pile the pile casing member into the ground;
Pulling out the PHC file by pulling the rope for holding a file in a state that the vibro hammer grasps the pile casing member;
Releasing the holding state of the pile casing member from the vibro hammer and pulling the rope body for holding the pile while the pile casing member is placed on the ground to separate the PHC pile from the pile casing member and moving the pile casing member; And
And inserting the crane rope loop into the pile casing member and grasping the pile casing member with the vibro hammer to pull out the pile rope loop.

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