KR101834962B1 - Device and method for loading newly installed pile - Google Patents

Abstract

The present invention relates to a newly installed pile to reinforce the floor basis of an existing building, and more specifically, relates to an apparatus to load a newly installed pile and a loading method thereof, which are able to allow the newly installed pile to share a part of the load applied to a floor basis. According to the present invention, the apparatus to load the newly installed pile comprises: a plurality of loading rods whose bottom ends have a hanging bump and whose top ends are combined with a connection means; a plurality of extension means whose bottom ends are combined with a connection means and whose top ends have a reaction plate fixing means; a loading means placed between a loading plate placed on the top end unit of the newly installed pile and a reaction plate fixated on the top end of the connection means to apply a certain load between the loading plate and reaction plate; a loading plate fixing means to apply a load to the loading means and to combine the loading plate with the loading rod; and a reinforcing structure placed on the newly installed pile on the bottom side of the loading plate to reinforce the newly installed pile. The hanging bump of the loading rod is an arc-shaped circular hanging bump to correspond to a newly installed pile with a circular cross-section to wrap around the newly installed pile. The loading rod is made to go through a punching hole and the newly installed pile to place the bottom end of the loading rod on the bottom end unit of the floor basis. Then, the loading rod is rotated to make the circular arc-shaped hanging bump supported by the bottom end unit of the floor basis. A part of a load applied to the floor basis is shared by the top end of the newly installed pile through the loading plate, and then the loading means, connection means, extension means, and reaction plate are removed.

Description

[0001] The present invention relates to a new pile loading device,

More particularly, the present invention relates to a new pile newly installed to reinforce a foundation of an existing building, more specifically, to a part of a load under a foundation found on a new pile And to a loading device and a loading method for a new pile to be shared.

This study is the result of research conducted by the Ministry of Land, Transport and Maritime Affairs and the Agency for Technology Development of Korea (Ministry of Land, Transport and Maritime Science and Technology) (project number: 16TBIP-C111107-01-000000, title: File method development).

In the past, when a pile was newly installed to reinforce the foundation of the floor, by injecting injection material such as mortar into the space between the foundation and the pile, the load received under the foundation of the floor is completely burdened by the foundation, The lag load has been applied to the pile and floor foundation.

A similar prior art that includes a step of applying a load to a new pile is Korean Patent No. 10-0654228 and No. 10-1103530, which are designed to apply a load to a foundation of a foundation using a new pile to raise the foundation of the foundation. This prior art is a technique developed for directly building a skewed structure, and a load similar to the object of the present invention can be achieved because a load is applied to a new pile during the course of the technique.

No. 10-0654228 discloses a structure in which a perforation hole is formed in a bottom of a structure and a reinforcing net and a welded setting member formed to surround a guide pipe are inserted into a perforation hole and integrated with a filling material such as mortar, And pushes down the structure to raise the structure. The setting member supports the reaction force at this time. That is, the reaction force for press-in of the pile is transmitted to the inner wall of the perforation hole through the setting member, the welded reinforcing bar net and the filler. Further, a projecting member such as a reinforcing bar is previously provided on the inner surface of the perforation hole, and is welded to the reinforcing net to be engaged with the setting member.

No. 10-1103530 discloses an apparatus for forming a plurality of projections by perforating a base of a floor and forming a plurality of projections of a triangular cross section which are spaced apart from each other at a plurality of positions on a perforated wall, A fixing pipe is formed between the protrusions to form at least one base fixing rod welded in the longitudinal direction so that the base fixing rod supports the reaction force of the new pile pressing. The pushing reaction force is transmitted to the pore wall of the bottom foundation by the joining structure of the ridge and the protrusion. In the concrete contents for the practice of the invention, the fixing pipe is integrated with the foundation concrete by dumping and filling.

In addition to the structure for supporting the reaction force of the above two techniques, a similar structure such as a loading device such as a hydraulic jack and an upper supporting body for supporting the loading device is formed on the setting member or the base fixing rod.

The two prior arts are designed to raise a structure by applying a load to a new pile. The purpose of the technique may be different, but a step of applying a load to a new pile may be a prior art of the present invention.

However, in the prior art as in the above-mentioned prior arts, a pile is installed to reinforce a foundation of a floor, and an injection material is injected to integrate the foundation and the pile so that the pile is not added to the load Since the load is shared, the load sharing efficiency of the new pile is not high.

In addition, two prior arts for lifting a structure by applying a load to a newly installed pile include a loading device for applying a load to the pile, a superstructure for supporting the pile, a piercing structure on the foundation of the pile, And the like. Particularly, the means for supporting the reaction force on the air hole of the perforation hole is finally integrated with the foundation of the structure by injecting the injection material such as mortar, so that the air for the time for hardening the mortar is delayed. Also, the structure for transferring the load to the hole of the perforation hole is also required to install a protruding member inside the perforation hole or to form a protrusion. Such a work in a narrow perforation hole is difficult and time-consuming It is expected.

(Document 1) Korean Patent Registration No. 10-0654228 (2006.06.06 Announcement) (Document 2) Korean Patent No. 10-1103530 (2012.01.06 Announcement)

In order to solve the above-described problems, the present invention provides a method of manufacturing a pile comprising the steps of forming a perforation hole by drilling a bottom foundation, integrating a part of the load, . Particularly, there is no difficulty in forming a part of the inner wall of the narrow hole or forming additional reinforcement means on the inner wall, and it is possible to quickly and simply transfer part of the load of the foundation to the new pile without the problem of waiting for the hardening time of the filler such as mortar for integration And to provide a loading device and a loading method of a newly installed pile which can be integrated afterwards.

The present invention has been made in view of the above problems, and it is an object of the present invention to provide an apparatus and method for controlling the same.

According to one aspect of the present invention, there is provided a method of drilling a floor base of an existing building and penetrating a perforation hole to newly connect a new pile to a floor foundation A lower end of which is provided with a locking protrusion which is supported at a lower end of the floor base, and the upper end thereof is connected to the connecting means through the lower plate; A plurality of elongating means coupled to the connecting means at the lower end thereof and penetrating the reaction plate and having a reaction plate fixing means at an upper end thereof; A loading means provided between a loading plate provided at an upper end of the new pile and a reaction plate fixed to an upper end of the connecting means to apply a predetermined load between the loading plate and the reaction plate; A load plate fixing means for applying a load to the load means and then coupling the load plate and the remainder bar; And a reinforcement structure provided to reinforce a new pile on a new pile under the load plate, wherein a portion of the load received on the base of the new pile is distributed to the top of the new pile through the load plate, And the resilient means and the resilient plate are removed.

According to an aspect of the present invention, the new pile is formed of a newly formed pile having a circular section, and the retaining jaws of the load-bearing rods are formed as arcuate locking pawls which are formed so as to surround the new pile corresponding to the newly- The bottom end of the load rod is positioned at the lower end of the bottom foundation by passing the bottom side bar between the perforation hole and the newly formed pile, and then the bottom end of the bottom rod is rotated to rotate the bottom end of the bottom base. do.

According to an aspect of the present invention, the reinforcing structure is constituted by at least one annular resistance plate having an opening through which the load rod passes and being fixed to an outer surface of the new pile.

In one aspect of the present invention, the reinforcing structure is constituted by at least one cylindrical ring or C-shaped ring fixed to the outer surface of the new pile.

According to one aspect of the present invention, a male thread is formed at the upper end of the load-receiving bar and at the lower end of the extending means, and both ends of the connecting means are formed with corresponding female threads.

According to an aspect of the present invention, a male thread is formed on an upper end of the load rod, the connecting means includes an eye nut screwed to a male screw formed on the upper end of the load rod, and a hook provided at a lower end of the extending means .

According to one aspect of the present invention, the load plate is formed of a circular or polygonal plate that can be inserted into a perforation hole, and has a plurality of openings formed in a U- do.

According to another aspect of the present invention, there is provided a method of manufacturing a building, comprising the steps of: A second step of partially removing the ground around the perimeter of the perforation hole to secure a space to be provided with the stopper; A third step of installing a new pile having a cross section such as an H-shape, a circular shape or a polygonal shape and having a reinforcing structure on its outer surface; A re-lowering bar is provided at the upper end of the newly installed pile, a lowering rod is provided at the lower end thereof, and a lowering plate having a loading plate fixing means is provided at the upper end thereof. Step 4; A fifth step of installing a loading means, an extending means and a reaction force plate, combining the upper end of the load-receiving rod and the lower end of the extending means, and installing a loading means between the load plate and the reaction plate; A sixth step of transferring a part of the load of the bottom foundation to the upper end of the new pile using the loading means, and fixing the loader and the load plate to each other using the load plate fixing means; A seventh step of removing the loading means, the extending means and the reaction plate; And pouring an injection material into the perforation hole and the space to integrate the new pile and the bottom foundation, and the third step includes a step of piling up the new pile having an opening through which the load is passed, The method of claim 1 or 2, wherein the reinforcing structure comprises a reinforcing structure formed of an annular resisting plate, and the fourth step comprises passing the re-lowering bar, which is formed at the lower end of the protruding jaw, between the perforation hole and the newly- And the retaining rods are rotated so that the retaining jaws of the load rods are supported on the lower end portions of the bottom foundation.

According to the loading device and the loading method of the new pile according to the present invention, in order to share the load of the foundation floor of the existing building with the new pile, a simple member is inserted through the hole necessary for the installation of the new pile, Is transferred to the pile, there is an effect that it can be simply and quickly loaded.

The effects of the present invention are not limited to those mentioned above, and other solutions not mentioned may be clearly understood by those skilled in the art from the following description.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view schematically showing a state where a loading device of the present invention is installed. Fig.
FIG. 2 is a view schematically showing a state in which a loading device of the present invention applies a load to a new pile.
3 is a view schematically showing a state where a load is applied to a new pile after a load is applied.
4 is a view showing another embodiment of the connecting means of the present invention.
5A and 5B are views showing an embodiment of a charge plate of the present invention.
6 is a view showing an embodiment of a retaining jaw corresponding to a circular newly formed pile.
7 is a view showing an embodiment in which a resistance plate constituting a loading device of the present invention is constituted on a newly formed pile.
8 is a view showing an embodiment in which a reinforcing structure constituting a loading device of the present invention is constituted on a newly formed pile.

Further objects, features and advantages of the present invention will become more apparent from the following detailed description and the accompanying drawings.

Before describing the present invention in detail, it is to be understood that the present invention is capable of various modifications and various embodiments, and the examples described below and illustrated in the drawings are intended to limit the invention to specific embodiments It is to be understood that the invention includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Also, the terms " part, "" unit," " module, "and the like, which are described in the specification, refer to a unit for processing at least one function or operation, Software. ≪ / RTI >

In the following description with reference to the accompanying drawings, the same components are denoted by the same reference numerals regardless of the reference numerals, and redundant explanations thereof will be omitted. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail.

Hereinafter, a loading device and a loading method of a new pile according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a view schematically showing a state in which a loading device according to the present invention is installed, FIG. 2 is a view schematically showing a state in which a loading device of the present invention applies a load to a new pile, And a load is maintained after the load is applied.

The apparatus for loading a new pile according to the present invention is characterized in that a new foundation pile (5) penetrating through a pierced hole (2) and newly installed in the lower ground (4) A lower end of which is provided with a locking protrusion 12 which is supported by the bottom foundation lower end 1a and the upper end thereof is provided with a plurality of remainder rods 11 penetrating through the lower plate 13 and coupled to the connecting means 22, A plurality of extending means 21 coupled to the connecting means 22 at the lower end thereof and passing through the reaction plate 23 and having a reaction force plate fixing means 24 at the upper end thereof, A loading means 25 provided between a loading plate 13 provided at the upper end of the connecting means and a reaction plate 23 fixed to the upper end of the connecting means for applying a predetermined load between the loading plate and the reaction plate, And a load plate fixing means (14) for connecting the load plate and the remainder rod (11) after applying a load to the load plate Characterized in that the set pile (5) removing After sharing a portion of the load with the floor base (1) at the top under the loading unit 25 and the connecting means, the extension means 21 and the reaction plate 23.

The new pile 5 penetrates through the perforation hole 2 formed in the bottom foundation 1 and penetrates into the ground 4. The sectional shape of the new pile 5 can be circular, polygonal, H-shaped, And any method of installation is possible. In order to engage the engaging step 12 at the lower end of the reaming rod 11, a method of integrally manufacturing by forging or the like, a method of welding, a male thread at the lower end of the reaming rod 11, ) May be provided with a female screw and screwed together.

In particular, in the case of screw coupling, the fastening nut 27 is further provided at the lower portion of the fastening protuberance 12, so that the fastener and the fastening protuberance can be more firmly fixed. It is convenient to use hydraulic cylinders for the loading means 25, and an electric stepping motor may also be used. It is preferable that the reaction force plate fixing means 24 is provided with a female screw and a male thread corresponding to the rearsing bar 11 is formed and screwed. By applying a load using the loading means 25, The lower shaft can be fixed, and a female screw can be a hexagonal nut or a butterfly nut. When a constant load is applied to the upper end of the newly installed pile 5 through the load plate 13, the reaction force is transmitted to the bottom foundation base 1a through the remainder rod 11 and the engagement protrusion 12, The load corresponding to the reaction force is received less and the load corresponding to the reaction force of the new pile is shared.

A male screw is formed at the upper end of the re-lowering bar 11 and a lower end of the extending means 21 and a female screw corresponding to each end of the connecting means 22 is formed, It is possible to easily separate the configuration from the non-configuration. The connecting means 22 for connecting the elongating means 21 to the extending means 21 and the connecting means 22 for connecting the extending means 21 and the remainder rod 11 are connected and disconnected through a screw connection Respectively.

4 is a view showing another embodiment of the connecting means of the present invention, in which a male screw is formed on the upper end of the re-lowering bar 11, and the connecting means is screwed to a male screw formed on the upper end of the re- And the hook 33 provided at the lower end of the extending means 21. This structure facilitates separation of the structure necessary for holding the load after the completion of the load can do. A hook 33 is used for quick coupling and disconnection and the corresponding one of the nuts 32 is screwed to the upper end of the lower bar 11.

5A and 5B are views showing an embodiment of a charge plate of the present invention.

The load plate 13 is formed of a circular or polygonal plate that can be inserted into the perforation hole 2 and has a plurality of openings 31 opened in a U- So that the placement of the re-lowering bar 11 and the loading plate 13 within a narrow perforation hole is facilitated. The load plate 13 can be installed on the upper end of the new pile 5 so as to be able to apply a load and to pass the remainder rod 11. The load plate 13 is fixed by the load plate fixing means 14 provided on the upper portion of the load plate, And is coupled with the lower bar 11. It is possible to form a circular opening through which the reinforcement rod 11 can pass, and in the case of the opening 31 which is opened by the U-shape, the reinforcement rod 11 can be easily inserted.

6 (a) and 6 (b) are views showing one embodiment of a retaining pawl corresponding to a circular new pile. In correspondence with the newly formed pile 5b having a circular section, the retaining pawl 12a is circular So that it is possible to easily install the re-base rod 11 provided with the arcuate locking step 12a through the narrow space between the perforation hole 2 and the circular newly formed pile. The remainder rod 11 is inserted through the narrow space between the inner wall of the perforation hole 2 and the circular newly formed pile 5b so that the arcuate locking protrusion 12a reaches the space portion 3, So that the arcuate locking step 12a can be supported on the floor base bottom end 1a. When the space between the H-type newly formed pile 12a or a rectangular section such as the perforation hole 2 and the newly formed pile is sufficient, a locking protrusion 12 which is not an arc type is suitable, and a circular new pile 5b or a circular It is preferable to apply such an arcuate locking step 12a to a newly formed pile of a nearby polygon.

The loading device of the present invention may further include a reinforcement structure for reinforcing the new pile. Fig. 7 is a view showing an embodiment in which an annular resisting plate as a reinforcing structure constituting a loading device of the present invention is constituted on a newly formed pile, Fig. 8 is a view showing an example in which a cylindrical ring, which is a reinforcing structure constituting the loading device of the present invention, And Fig.

Specifically, as shown in Fig. 7, the reinforcing structure is fixed to the newly formed pile 5 at the lower portion of the loading plate 13 (for example, welding or the like) And an annular resistive plate 15 on which the protrusions 15a are formed. In this case, the annular resistance plates 15 may be provided in plural, and in this case, a gap may be formed in the new pile 5 from the lower portion of the load plate 13 in the longitudinal direction thereof. The outer diameter of the annular resisting plate 15 may be equal to or larger than the diameter of a virtual circle connecting the respective re-bars 11.

As shown in Fig. 8, the reinforcement structure may be fixed to the outer wall of the newly formed pile 5 at intervals along the longitudinal direction thereof, as shown in Fig. 8, together with the annular resisting plate 15 or the annular resisting plate 15. [ For example, a plurality of cylindrical rings 16 that are joined by welding or the like. Here, instead of the cylindrical ring 16, a C-shaped ring partially cut out and separated may be used. The outer diameter of the cylindrical ring 16 or the C-shaped ring may be smaller than the diameter of a virtual circle connecting the respective rears 11, and may have a predetermined length in the longitudinal direction of the newly formed pile 5 .

A loading method for applying a load to a new pile using the loading device of the present invention will be described below.

A first step of perforating the existing building floor base 1 to a predetermined diameter so as to penetrate through the existing building floor base 1, a step of removing a part of the ground 4 immediately below the perforation hole 2, A third step of installing a new pile 5 having a section such as an H-shape, a circular or polygonal shape, a loading step 13 at the upper end of the new pile 5, And the upper end of which is provided with a re-lowering bar 11 provided with a lower plate fixing means 14. The re-lowering bar 11 is provided at a lower end of the lower base 1a, The upper end of the remainder rod 11 and the lower end of the extending means are engaged with each other so that the distance between the loading plate 13 and the reaction plate A fifth step of installing a loading means on the bottom foundation 1 and a fifth step of loading a part of the load of the bottom foundation 1 to the upper end of the new pile 5 using the loading means 25, A sixth step of fixing the remainder rod 11 and the load plate 13 to each other, a seventh step of removing the loading means 25, the elongating means 21 and the reaction plate 23, And pouring the injection material into the space part (3) to integrate the new pile and the foundation of the floor, so that a part of the load received by the existing building floor foundation (1) is transferred to the new pile (5) do.

In the first step, it is most easy to drill a circular shape by securing a space through which the peg to be newly installed can pass. In the second step, securing the space portion 3 in which the stopping jaw 12 is to be installed is secured. It is preferable that the new pile installed through the perforation hole 2 in the third step is irrelevant in any way and the upper end of the new pile is positioned between the upper end and the lower end of the bottom foundation 1. Possible examples of new piles are micro piles, helical piles, indent piles, etc., and any other piles can be applied. In the sixth step, a part of the load received by the bottom foundation 1 is guided by the engaging jaw 12 and the ashes 12 by using the loading means 25, and the fourth step and the fifth step are the steps of installing the loading device of the present invention. To the upper end of the new pile (5) through the lower bar (11) and the lower plate (13). Step 8 is a step of removing members not necessary for supporting the loaded load. In the eighth step, the mortar or other injection material is filled into the perforation hole 2 and the space part 3 while maintaining the transferred load state. And integrating the new pile 5 with the bottom foundation 1.

Since the newly installed pile 5 shares a part of the load received by the bottom foundation 1 through the above process, the bottom foundation receives a smaller load than the existing load after completion of the construction. Therefore, since there is a margin to receive the load to which the bottom foundation is added, even if the load is increased due to the remodeling of the building or the like, it can be supported more effectively.

In the present invention as described above, when a new pile is installed to reinforce a foundation of a building, part of the load received by the floor foundation is transferred to a new pile using the loading device and the loading method of the present invention, It is possible to effectively utilize the load-bearing ability of the foundation and the new pile.

The embodiments and the accompanying drawings described in the present specification are merely illustrative of some of the technical ideas included in the present invention. Therefore, it is to be understood that the embodiments disclosed herein are not for purposes of limiting the technical idea of the present invention, but rather are not intended to limit the scope of the technical idea of the present invention. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

1: bottom foundation 1a: bottom foundation bottom
2: perforation hole 3:
4: Ground 5: New pile
5a: H type newly formed pile 5b: Circular type new pile
11: jaw bar 12: hanging jaw
12a: an arc-shaped locking jaw 13:
14: load plate fixing means 15: annular resisting plate
16: annular ring 21: extension means
22: connecting means 23: reaction plate
24: reaction plate fixing means 25:
27: tightening nut 31: opening
32: Eye nut 33: Hook

Claims (8)

A new pile loading device for piercing a floor foundation of an existing building and penetrating a perforation hole and joining a newly installed pile to a floor foundation,
A lower end of which is provided with a locking protrusion supported at a lower end of the floor base, the upper end of which is connected to the connecting means through the lower plate;
A plurality of elongating means coupled to the connecting means at the lower end thereof and penetrating the reaction plate and having a reaction plate fixing means at an upper end thereof;
A loading means provided between a loading plate provided at an upper end of the new pile and a reaction plate fixed to an upper end of the connecting means to apply a predetermined load between the loading plate and the reaction plate;
A load plate fixing means for applying a load to the load means and then coupling the load plate and the remainder bar; And
And a reinforcing structure provided to reinforce the newly installed pile on the lower portion of the lower plate,
And the loading means, the connecting means, the extending means, and the reaction plate are removed after a part of the load under the foundation of the floor is distributed to the upper end of the new pile through the load plate,
The new pile is formed of a new pile having a circular section,
Wherein the holding jaws of the load-bearing rods are formed by an arcuate locking protrusion which is formed integrally with the load-bearing rods in such a manner as to cover a newly formed pile in correspondence with a newly formed pile having a circular cross-section so that the lower rod passes between the pierced hole and the newly- Wherein the bottom end of the bottom foundation is positioned at a lower end of the bottom foundation, and then the bottom end of the bottom foundation is rotated to rotate the bottom end of the bottom foundation.
delete The method according to claim 1,
Wherein the reinforcing structure comprises at least one annular resistance plate having an opening through which the load rod passes and being fixed to an outer surface of the new pile.
The method according to claim 1,
Wherein the reinforcing structure is constituted by at least one cylindrical ring or C-shaped ring fixed to the outer surface of the new pile.
The method according to claim 1,
Wherein a male thread is formed at the upper end of the load-bearing rod and at the lower end of the extending means, and female threads corresponding to the respective ends of the connecting means are formed.
The method according to claim 1,
A male screw is formed on an upper end of the load bar,
Wherein the connecting means comprises an eye nut screwed to a male screw formed on an upper end of the load bar and a hook provided at a lower end of the extending means.
The method according to claim 1,
Characterized in that the load plate comprises a circular or polygonal plate that can be inserted into the perforation hole and has a plurality of openings which are U-shaped openings for accommodating the bottom side bar.
A first step of perforating a predetermined diameter so as to penetrate through an existing building floor base;
A second step of partially removing the ground around the perimeter of the perforation hole to secure a space to be provided with the stopper;
A third step of installing a new pile having a reinforcing structure on its outer surface;
A re-lowering bar is provided at the upper end of the newly installed pile, a lowering rod is provided at the lower end thereof, and a lowering plate having a loading plate fixing means is provided at the upper end thereof. Step 4;
A fifth step of installing a loading means, an extending means and a reaction force plate, combining the upper end of the load-receiving rod and the lower end of the extending means, and installing a loading means between the load plate and the reaction plate;
A sixth step of transferring a part of the load of the bottom foundation to the upper end of the new pile using the loading means, and fixing the loader and the load plate to each other using the load plate fixing means;
A seventh step of removing the loading means, the extending means and the reaction plate; And
And injecting an injection material into the perforation hole and the space to integrate the new pile and the bottom foundation,
The third step includes installing a new pile having a reinforcement structure having at least one annular resistance plate having an opening through which the load rod passes and being fixed to an outer surface of the new pile,
The fourth step is a step of passing the re-lowering bar integrally formed at the lower end of the protruding jaw between the perforation hole and the newly formed pile to place the re-lowering bar in the space of the bottom foundation and then rotating the re- Is supported on the lower end of the bottom foundation.

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