KR101992651B1 - Column Pile Construction Method Using Removeable Auxiliary Pile - Google Patents

Abstract

The present invention relates to a column pile construction method using a removable auxiliary pile, lifting a pretensioned spun high-strength concrete (PHC) pile and a joint pile connected thereto, inserting the piles into an outer casing, then inserting the removable auxiliary pile thereinto, and rotating and coupling the removable auxiliary pile such that coupling and decoupling are easy. A desirable embodiment of the present invention provides the column pile construction method using the removable auxiliary pile comprising the steps of: (a) perforating a perforated hole to a set depth; (b) embedding the joint pile, connected to an upper end of a lower PHC pile, into the perforated hole; (c) welding a key for lifting to protrude from a side surface of an upper part of the joint pile; (d) coupling the removable auxiliary pile into the joint pile to be inserted to a set depth; (e) applying a light strike to an upper end of the removable auxiliary pile to get a front end of the lower PHC pile to penetrate through a support layer; (f) inserting a steel column, having multiple stud bolts on an outer side of a lower part, into the hollow space of the removable auxiliary pile to embed a lower end up to the inside of the joint pile; (g) pouring a grout material into the joint pile; (h) decoupling the removable auxiliary pile from the joint pile and drawing the auxiliary pile to the outside; and (i) filling the perforated hole with earth and sand.

Description

[0001] The present invention relates to a pile construction method using a removable auxiliary port,

The present invention relates to a file construction method using a detachable auxiliary port, and more particularly, to a method of installing a PHC file and a joint file connected thereto by inserting a detachable auxiliary port into a lifting and out casing, And the transfer of hirer energy to the PHC file in the connection state of the detachable auxiliary port can directly transfer the hirer energy transfer to the center axis, so that the damage of the PHC file does not occur, The present invention relates to a file construction method using a detachable auxiliary port that allows the maximum performance and the end bearing capacity of a PHC file to be utilized through a rebound amount check at an auxiliary port connected to the PHC file.

Conventionally, in order to confirm the end bearing capacity, the PHC pile has been installed up to the surface of the ground, and after the pile has been cut several times along with the ter- minator, there has been a problem that the loss amount of the PHC pile is greatly increased.

The PHC pile was dropped to the inside of the outcasing, and the pylon cushioning material was dropped on the PHC pile. After the steel pipe auxiliary port was placed on the PHC pile head of the inside of the outcasing, the drop hammer And the drop hammer is inserted into the inside of the outcasing, so that the direct hunting is adopted. In this case, the PHC pile was easily broken due to the failure of the steel pipe auxiliary port and the drop hammer and the center axis of the PHC pile, so that the auxiliary port of the non-retaining steel pipe was used as a drop hammer. It is difficult to maximize the performance of the PHC pile and the bearing capacity of the pile. Therefore, the installation cost of the PHC pile increases, and the uncertainty of long-term settlement is increased.

BACKGROUND ART [0002] As a background of the present invention, Patent Publication No. 2016-0053432 "Auxiliary pile method and pile assembly used therein" (Patent Document 1) is known. In the background art, a " perforating step " The intermediate member 200 is coupled to the upper portion of the lower pile 100 and the auxiliary pile member 300 is temporarily coupled to the upper portion of the intermediate member 200 to produce the pile assembly A, 100) and the center of the cross section of the auxiliary pile (300) are located on the same line; An assembly step of inserting the peg assembly A into the perforation hole; A step of inserting the auxiliary pile member (300) into the pit assembly (A) so that the lower end of the pile assembly (A) approaches the perforation hole; And an auxiliary pile removing step of removing the auxiliary pile member 300 from the intermediate member 200 and removing the auxiliary pile member 300 from the perforation hole.

However, the above-mentioned background art is not integrated, and reliability of hanger energy transfer and confirmation of bearing capacity is lowered, and there is a problem in that it is impossible to construct a steel column for retrofitting.

Patent Publication No. 2016-0053432 "Auxiliary pile method and pile assembly used therein"

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a PHC file and a joint part file connected thereto by inserting a detachable auxiliary port, The linkage of hanger energy can be transferred directly to the PHC file, so that the transfer of the horses energy is transmitted to the center axis, so that the damage of the PHC file does not occur. It is an object of the present invention to provide a file construction method using a detachable auxiliary port which allows the performance and the end support force of a PHC file to be used as much as possible through a rebound amount check.

(A) punching a perforation hole at a predetermined depth; (b) a lower PHC file having a predetermined length and a hollow through the central portion, and a finishing plate formed at the lower end to close the hollow at the lower end thereof, and a joint file connected to the upper end of the lower PHC file, step; (c) welding the lifting key to the side surface of the upper portion of the joint file; (d) a key-shaped groove formed at a position corresponding to the key for lifting at the lower end of the main body, and a ring-shaped reinforcement welded to the inside of a certain distance above the lower end of the main body, And a detachable auxiliary port formed of a plurality of reinforcing ribs configured to connect the inner circumferential surface of the main body and the ring and the key groove of the lower end portion of the main body are coupled to the lifting key of the joint file, So as to be deeply inserted; (e) tipping the upper end of the detachable auxiliary item so that the tip of the lower PHC pile penetrates into the supporting layer; (f) inserting a steel column in which a plurality of stud bolts are formed on the outer side of the lower part of the inner side of the detachable auxiliary part, so that the lower end is inserted into the inside of the joint part; (g) injecting a grout material into the interior of the joint file; (h) disassembling the detachable auxiliary port from the joint file and pulling it out; (i) recovering the perforation hole with the gravel to provide a method of constructing a file using a detachable auxiliary port.

In addition, in the step (b), it is desirable to provide a file construction method using a detachable auxiliary component, wherein the joint file is a PHC file or a steel pipe file.

In addition, in the step (b), the finishing plate of the joint file is formed by passing through the air holes, one side of which is joined to the upper end of the finishing plate, and the other side is hinged to be rotatable upward, And a closing part configured to close the opening of the air outlet.

Also, in the step (d), a cushioning material is formed on the lower surface of the reinforcing ring to provide a file construction method using the detachable auxiliary port.

Further, in the step (d), the key groove is formed such that the lower end of the main body is cut into a shape corresponding to the lifting key, and the main body is inserted into the key groove at the upper end of the joint file, And the detachable auxiliary port is coupled to the coupling file.

In the step (d), a coupling band is formed corresponding to both sides of the lower end of the main body, and a key groove having a predetermined depth in the horizontal direction is formed at the center in the height direction of the inner peripheral surface of the coupling band. The coupling band and the lifting key are staggered at the upper end and then rotated so that the detachable auxiliary port is coupled to the coupling file.

In addition, in the step (d), a separate extension pipe extending in the longitudinal direction is formed in the main body, and a joint plate is attached to the joint between the main body and the extension pipe, .

In the step (f), a height regulating reinforcing bar is formed at a lower end portion of the steel column so as to protrude by a predetermined length, and a plurality of spacing members protrude horizontally from the side and height regulating bars of the steel column. To provide a file construction method using a detachable auxiliary port.

The method of constructing a file using a detachable auxiliary aid of the present invention is characterized in that a PHC file and a joint file connected thereto are inserted into a lifting and out casing and then a detachable auxiliary port is inserted and rotated to be combined to facilitate coupling and disassembly. In the PHC file, it is possible to transfer the habitat energy directly to the PHC file, so that the transfer of the horses' energy is transmitted to the central axis and the damage of the PHC file does not occur. By checking, there is a very useful effect of maximizing the performance and the end bearing capacity of the PHC file.

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the principles of the invention, Shall not be construed as limiting.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a view showing a first embodiment of a pile construction method using a detachable auxiliary end of the present invention in order of construction.
FIG. 2 is a view showing an embodiment in which an air vent member is formed in a finishing plate of a joint file of the present invention. FIG.
3 is an exploded perspective view and a coupled state view showing a coupling structure of a joint file and a detachable auxiliary member in a pile construction method using the detachable auxiliary member of the present invention.
4 is a cross-sectional view showing another embodiment of FIG.
Fig. 5 is an enlarged view of a portion A in Fig. 1C.
6 is a view showing a second embodiment of the file construction method using the detachable auxiliary end of the present invention in order of construction.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings, but the present invention is not limited thereto.

Hereinafter, the technical structure of the present invention will be described in detail with reference to the preferred embodiments.

FIG. 1 is a view showing a first embodiment of a file construction method using a detachable auxiliary port according to the present invention in order of construction. FIG. 6 is a view showing a second embodiment of a file construction method using a detachable auxiliary port of the present invention, It is a degree.

As shown in FIG. 1A and FIG. 6A, the file construction method using the detachable auxiliary port of the present invention drills the perforation hole h to a predetermined depth at the location where the file for supporting the backwash is to be installed (a).

And a perforation hole (h) is formed by piercing with a file driver using an auger casing (SDA / DRA method) or the like.

Subsequently, as shown in FIGS. 1B and 6B, the lower PHC file 100 and the joint file 200 are joined to insert into the perforation hole h (b).

The lower PHC file 100 is composed of a general PHC file, and can be used for both a large diameter and a medium diameter.

The joint file 200 is coupled to the upper part of the lower PHC file 100. The joint file 200 is a PHC file having the same shape as the lower PHC file 100 as shown in FIG. Steel pipe file.

The joint plate 200 is formed with a hollow 210 through the center portion and a lower plate 220 is formed at a lower end of the joint plate 200 by a variety of known methods such as welding to close the hollow 210, Close the lower end.

The finishing plate 220 closes a lower end portion of the joint file 200 so that the inside of the joint file 200 can be used, the inflow of foreign soil or foreign matter can be prevented, and grout material can be injected, It is possible to improve the quality of construction in terms of the adhesive force and the compressive strength in the joint part 200, which is the connection part between the column 400 and the lower PHC file 100.

Further, the finishing plate 220 may be welded to the lower end of the joint pile 200.

FIG. 2 is a view showing an embodiment in which an air vent member is formed in a finishing plate of a joint file of the present invention. FIG.

2, an air hole 221 is formed in the finishing plate 220 so that the joint file 200 connected to the upper end of the PHC pile 100 is inserted into the perforation hole h, The air hole 221 may be provided with an abutment portion 231 which is joined to the upper end of the finishing plate 220 and an air hole The air exhausting member 230 is composed of the closing portion 233 configured to be rotatably connected to the upper portion by the hinge 232 so as to close the air hole 221 so that only when the air is exhausted, Is opened to discharge the air. After the air is discharged, the closing part 233 is rotated downward to close the air hole 221, so that the grout material can be filled in the upper part.

Then, the lifting key 211 protrudes from the side surface of the upper portion of the joint file 200 (c).

the steps (b) and (c) may be sequentially performed. After the keys for lifting 211 are welded to the joint file 200 in advance, the joints connected to the upper end of the PHC file 100 The steps (b) and (c) may be simultaneously performed by inserting the file 200 into the perforation hole h.

Then, as shown in FIGS. 1C and 6C, the detachable auxiliary port 300 is coupled with the detachable auxiliary port 300 so that the detachable auxiliary port 300 is inserted at a certain depth.

FIG. 3 is an exploded perspective view and a coupled state view showing a coupling structure of a joint file and a detachable auxiliary member in a pile construction method using a detachable auxiliary member of the present invention, and FIG. 4 is a cross- And Fig. 5 is an enlarged view of a portion A in Fig. 1C.

The detachable auxiliary port 300 includes a main body 330 having a hollow shape in which a hollow 310 is formed and a key groove 341 formed at a position corresponding to the lifting key 211 at the lower end of the main body 330, A ring-shaped reinforcing ring 350 welded to an upper portion of a certain distance from the lower end of the main body 330 and a plurality of reinforcing ribs 320 arranged to connect the inner circumferential surface of the main body 330 with the reinforcing ring 350 So that the key groove 341 at the lower end of the main body 330 is coupled to the lifting key 211 of the joint file 200 so that the detachable auxiliary port 300 is provided inside the joint file 200 To be inserted at a predetermined depth.

The detachable auxiliary port 300 includes a main body 330 having a hollow cylindrical shape and an inner hollow portion 330. The main body 330 may have a predetermined length and a joint file 200 may be inserted into the main body 330 The inner diameter of the main body 330 is formed to be equal to or slightly larger than the outer diameter of the joint file 200 so as to be inserted.

A ring-shaped reinforcing ring 350 welded to the upper portion of a predetermined distance from the lower end of the main body 330 is formed at the upper end of the joint file 200, A plurality of reinforcing ribs 320 may be formed so as to connect the reinforcing ring 350 and the inner circumferential surface of the main body 330 to facilitate the coupling by supporting the lower surface of the reinforcing ring 350.

3, the lifting key 211 protrudes to a position corresponding to the upper side of the joint file 200 by various known methods such as welding to form the lifting key 211, The key groove 341 is formed such that the lower end of the main body 330 is cut into a shape corresponding to the lifting key 211 so that the main body 330 is inserted into the key groove 341 at the upper end of the joint file 200 The removable key 211 can be inserted and rotated so that the detachable auxiliary port 300 can be coupled to the joint file 200.

4, a coupling band 340 may be formed corresponding to both sides of the lower end of the main body 330 and a key groove 341 having a predetermined depth in the horizontal direction may be formed at the center of the inner peripheral surface of the coupling band 340 in the height direction. The main body 330 is inserted into the upper end of the joint part 200 so that the coupling band 340 and the lifting key 211 are staggered and then rotated so that the detachable auxiliary part 300 is inserted into the joint part 300, (Not shown).

Particularly, various known cushioning materials 351 are formed on the lower surface of the reinforcing ring 350, and the cushioning material 351 corrects the error when the coupling- Can play a role.

The main body 330 of the detachable auxiliary port 300 of the present invention may have a single cylindrical shape. However, as shown in FIG. 5, the main body 330 may have a separate extension pipe 330a extending in the longitudinal direction, The joining plate 380 may be attached to the joining portion of the main body 330 and the extension pipe 330a so as to be coupled to the joining plate 380 by the joining bolt 370,

Then, as shown in FIGS. 1D and 6D, the upper end of the detachable auxiliary port 300 is touched to penetrate the supporting layer of the lower PHC pile 100 (e).

At the lower end of the perforation hole (h), the distal end portion of the lower PHC pile (100) is not penetrated into the supporting layer by slime cement paste or the like. Therefore, the upper end of the detachable auxiliary port 300 is touched to penetrate the distal end portion of the lower PHC pile 100 into the supporting layer, thereby securing the required supporting force.

Thereafter, as shown in FIGS. 1E and 6E, the steel column 400 is inserted into the hollow interior of the detachable auxiliary port 300 (f).

The steel column 400 may be formed of various columns such as a steel pipe column and an H type steel so that the lower end of the steel column 400 is inserted into the inside of the joint pile 200 and the lower end of the steel column 400 is joined The distance from the finishing plate 220 of the secondary pile 200 to the length of the reinforcing steel / angle or the like, so that the height of the steel pillar 400 can be uniformly adjusted.

At this time, a plurality of stud bolts 410 are formed on the outer side of the lower part of the steel column 400 to serve as a shear connection member with the grout material G described later.

In particular, a height-adjusting reinforcing bar 420 may be formed at a lower end of the steel column 400 so as to protrude by a predetermined length to a vertical lower portion thereof so that the lower end of the steel column 400 contacts the finishing plate 220 inside the joint pile 200. So that the steel column 400 can be installed at a predetermined height by adjusting the distance.

A plurality of spacers 480 are horizontally protruded from both sides of the steel column 400 and the height adjusting bar 420 by a predetermined length on both sides with respect to the center of the cross section of the steel column 400, The steel column 400 is positioned at the center of the hollow 210 of the joint file 200 when the steel column 400 is inserted into the joint file 200.

Then, as shown in FIGS. 1F and 6F, the grout material G is injected into the joint file 200 (g).

The steel column 400 is inserted into the detachable auxiliary port 300 and the grout material G made of mortar or high concentration grout is inserted into the joint hose 200 through the injection hose 390 ) Or the like. The height of the injection should be kept in consideration with the adhesion resistance and the incorporation of the soil into the hole.

In this way, a separate pump car, a crane, and a trestle pipe are not required to form the connection portion between the steel column 400 and the lower PHC pile 100, and only the grout material G can be injected. Do.

The joint file 200 is formed by injecting a grout material G made of mortar or a high-concentration grout material and attaching the steel column 400 and the joint file 200 or increasing the compressive strength of the inside of the pile, (220).

Thereafter, as in Figures 1g, 6f and 1h, 6h, the detachable auxiliary port 300 is disassembled from the seam file 200 and pulled out (h), and the perforation hole h is returned to the gravel 700 (I).

The auger casing 300 and the detachable auxiliary port 300 are connected to each other and rotated in a direction opposite to that of the coupling, so that the coupling part 200 and the detachable auxiliary port 300 are separated and pulled, and then the punch hole h is backcracked.

In the method of constructing a file using the detachable auxiliary port of the present invention, the PHC file and the joint file connected to the PHC file are inserted into the lifting and out casing, and the detachable auxiliary port is inserted and rotated so as to facilitate coupling and disassembly. In the connected state of the auxiliary term, hiragana energy can be directly transferred to the PHC file, so that the hiragana energy transfer is transmitted to the central axis and the damage of the PHC file does not occur. There is a very useful effect that the performance of the PHC file and the end bearing capacity can be maximized.

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. The invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

100: Lower PHC file
200: Joint file
210: hollow
211: Key for salvage
220: Finishing plate
300: detachable auxiliary port
310: hollow
330:
340: Coupling band
341: Keyway
350: reinforcing ring
351: Cushioning material
400: Steel column
410: Stud bolt
420: height-adjustable rebar

Claims (8)

(a) drilling a perforation hole (h) to a predetermined depth;
(b) a lower PHC file 100 having a predetermined length and a hollow 210 passing through the central part, and a finishing plate 220 coupled to a lower end thereof to close the hollow 210, And the air hole 221 is joined to the joint part 231 joined to the upper end of the finishing plate 220 and the other side is coupled to the upper part with a hinge 232 rotatably so as to close the air hole 221 And a closing plate 220 which is opened and closed by an air exhaust member 230 constituted by a closing part 233 constituted by the connecting part 233 is connected to the connecting hole 231. The connecting part 200 connected to the upper end of the lower PHC pile 100 is inserted into the hole h A step of approximating;
(c) welding the lifting key 211 protruding from the upper side of the joint file 200;
a key groove 341 formed at a position corresponding to the lifting key 211 at the lower end of the main body 330, A ring-shaped reinforcing ring 350 welded to an upper portion of a predetermined distance from the lower end of the main body 330 and a plurality of reinforcing ribs 320 configured to connect the reinforcing ring 350 to the inner peripheral surface of the main body 330 The detachable auxiliary port (300)
The detachable auxiliary port 300 is inserted into the coupling part 200 at a predetermined depth so that the key groove 341 at the lower end of the main body 330 is coupled to the lifting key 211 of the coupling part 200 step;
(e) allowing the tip of the lower PHC pile (100) to penetrate the supporting layer by touching the upper end of the detachable auxiliary port (300);
(f) A steel column 400 having a plurality of stud bolts 410 formed therein is inserted into the hollow 310 of the detachable auxiliary port 300 and the lower end of the steel column 400 is inserted into the joint part 200 ;
(g) injecting a grout material (G) into the interior of the joint file (200);
(h) disassembling the detachable auxiliary port (300) from the joint file (200) and pulling it out;
(i) backing the perforation hole (h) with the gravel (700). The method according to claim 1,
In the step (b)
Wherein the joint file (200) is a PHC file or a steel pipe file. delete The method according to claim 1,
In step (d)
Wherein the cushioning material (351) is formed on the lower surface of the reinforcing ring (350). The method according to claim 1,
In step (d)
The key groove 341 is formed such that the lower end of the main body 330 is cut into a shape corresponding to the lifting key 211,
The main body 330 is inserted into the key groove 341 at the upper end of the coupling part 200 so that the lifting key 211 is inserted and rotated so that the detachable auxiliary part 300 is coupled to the coupling part 200 A file construction method using a detachable auxiliary port. The method according to claim 1,
In step (d)
A coupling band 340 is formed corresponding to both sides of the lower end of the main body 330 and a key groove 341 having a predetermined depth in the horizontal direction is formed at the central portion in the height direction of the inner peripheral surface of the coupling band 340,
The main body 330 is inserted into the upper end of the coupling part 200 so that the coupling band 340 and the lifting key 211 are staggered and then rotated to couple the detachable auxiliary part 300 to the coupling part 200 Wherein the file construction method comprises the steps of: The method according to claim 1,
In step (d)
The main body 330 is formed with a separate extension pipe 330a extending in the longitudinal direction,
Wherein a coupling plate (380) is attached to the coupling portion between the main body (330) and the extension pipe (330a) and coupled with the coupling pin (370). The method according to claim 1,
In step (f)
A height regulating bar 420 is formed at a lower end of the steel column 400 so as to protrude by a predetermined length to a vertical lower portion,
Wherein a plurality of spacers (480) protrude horizontally from the side surface of the steel column (400) and the height-adjusting reinforcing bar (420).

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