KR20150065128A

KR20150065128A - Self-enlargement piles and construction method thereof

Info

Publication number: KR20150065128A
Application number: KR1020140055881A
Authority: KR
Inventors: 임성대
Original assignee: (주)삼일이엔씨
Priority date: 2013-12-03
Filing date: 2014-05-09
Publication date: 2015-06-12
Also published as: KR20150065129A

Abstract

The present invention relates to a pile installed underground including extending pieces (2, 2a) capable of forming a pile extension unit on a part of a pile body. The extending pieces (2, 2a) are composed of multiple extending bodies (6) forming the pile extending unit by being radially extended and an extension supporting unit (12) guiding an extension direction of the multiple extending bodies (6) simultaneously with delivering an upper load to the ground under the pile extending unit. The extension supporting unit (12) is composed of an upper plate (14), a lower plate (16), and a middle supporting unit (18) and formed by filling a mold with a curable joining filler and forming into one body by pressing or molding after curing. The multiple extension bodies (6) are arranged to fill the bottom surface of an extension body receiving space (20) on the outer side of the middle supporting unit (18) before extending. A rotary cutting tip (4) for extending-cutting is mounted on the outer side of the extending bodies (6). If using the pile capable of extending by itself and supporting an extension hole, an allowable bearing capacity and drawing resistance of each pile in various strata not only a normal soil layer but also a firm bedrock layer can be remarkably increased so that the number of the piles to be constructed. In addition, the present invention obtains the excellent economic efficiency, thereby applying a pile in various constructions such as construction using a pile foundation instead of entrenching or using a direct foundation.

Description

[0001] SELF-ENLARGEMENT PILES AND CONSTRUCTION METHOD THEREOF [0002]

The present invention relates to a pile for use in the construction of a building or for fixing a structure. In particular, it is possible to form a large-diameter cut and enlarged portion by a pile itself without drilling a diameter according to a standard designed with a minimum amount of cutting. The pile can be formed as much as the size of the pile, and thus the supporting force can be reliably increased.

Generally, piles installed in the ground for the foundation of the construction structure and for foundation and fixation of the ground structures or offshore structures are designed to receive compressive force mainly at the tip. In order to efficiently use waste piles efficiently from the material side, It is necessary to expand the circumference to increase the allowable supporting force.

There have been many ways to enlarge the tip of the pile. In some cases, an irregular enlargement was formed at the tip of the pile.

In most cases of expanding the tip of the pile, it is necessary to complete the vertical piercing to the rock bed with a straight piercing drill and to drill the end of the piercing hole with a separate piercing drill. After that, the residual slime at the end of the hole is cleanly removed, the air hole of the diameter hole is stabilized, and concrete is poured into the installation space of the pile enlargement part. Thus, the enlarged concrete reinforcing portion is formed at the tip of the pile inserted into the perforation hole.

However, since the enlarged structure of the pile tip of the prior art has a large amount of equipment to be used, the amount of piercing is increased more than necessary, and it is difficult to prevent the air hole of the diameter hole from loosening or collapsing during drilling operation for expanding the end portion. It was not easy to use universally.

Furthermore, since the slurry and the ground water are naturally mixed in the clearance space where the pile enlargement part is to be formed, the quality of the concrete placed thereon is also difficult to guarantee the level required by the pile enlargement part.

In another example of the prior art, there is a case where the expander is radially expanded to form a pile enlarged portion by a chain provided at the tip of the pile body. However, after the expansion of the hard expanded body is completed, The pile body is not integrated with the expansion body because the slime is inserted between the expansion bodies even if concrete is placed in the pile enlargement part. Thus, when the pile load is applied, the expansion body becomes dull and the structure is completed There is a problem in that the settlement amount of the pile increases at the time of the later use load application. Also, even if pressure is applied to the concrete after forming the pile enlargement part, the concrete leaks out through the gap between the expansion bodies, and the pile enlargement part can not be formed securely due to the rising between the outer peripheral surface of the pile body and the perforation hole.

In addition, since the widening body is expanded by the wedge action, it becomes lower than the tip of the body of the pile and expands radially so as to resist the axial force of the area of either the straight hole portion of the lower portion of the pile body or the pile enlargement portion. It was difficult to do.

Particularly, it is possible to apply to the weak ground because it is a type in which the expanding body is press-fitted or type only in the radial direction instead of cutting the ground by the rotation of the expanding body having the cutting tip.

Korean Patent No. 10-1011143 entitled " Construction method for formation of foundation part of pile tip and formation of fixed fixing part of tension member,

Accordingly, the object of the present invention is to provide a self-diameter pile which forms a continuous pile enlargement part in which a pile enlargement part can be constructed, which is designed in advance not only in the soil layer but also in a hard rock layer to improve the permissible supporting force of the pile installed in the ground, .

Another object of the present invention is to provide a pile having a diameter cutting function and capable of supporting an enlarged diameter hole at the same time as the diameter of the pile and preventing the pile from being loosened or collapsed, and a method of manufacturing the pile.

Another object of the present invention is to provide a pile which is constructed of a very rigid material such as a metal and has a small diameter cut, which is excellent in economy and can be quickly installed, and a method of construction thereof.

It is another object of the present invention to provide a pile and a method of constructing a pile for forming a maximum pile enlarged portion by allowing the expanding body to function as a hammer bit so that the pile can be enlarged even in a hard rock.

It is still another object of the present invention to provide a pile and a method for constructing a pile enlarging portion, wherein the pressing body for radially expanding the pile enlarges the pile enlarging portion quickly without damaging the expanding body.

(2) (2a) capable of forming a pile enlarged portion on a part of a pile main body, wherein the piercing hole (2) (2a) (12) for guiding the expansion direction of the plurality of expanders (6) and transmitting the upper load to the lower ground of the pile enlargement part, and a plurality of expanders (6) And the extension support part 12 is formed by filling the mold with a curable joint filler material, which is composed of the upper plate body 14, the lower plate body 16 and the intermediate support part 18, The plurality of extensions 6 are arranged on the plane of the enlargement accommodating space 20 outside the intermediate support portion 18 before expansion and the rotary cutting tip 4 for the diameter cutting is disposed outside the expander 6 Is a pile having its own specific diameter.

According to the present invention, there is provided a method for constructing a pile installed in the ground, comprising the steps of inserting a pile main body, in which a piercing hole (2) (2a) The pendulum expander 8 is radially extended and the expanding support 12 guides the expanding direction of the main extension 8 and the auxiliary expander 8 so as to form a continuous pile enlarged portion in a plane, So that the supporting area is increased.

If the self-diameter pile forming the continuous pile enlargement part of the present invention is used, the extension body equipped with the piercing hole of the present invention acts as a hammer bit, so that the allowable supporting force of the pile in the various ground layers It is possible to reduce the amount of piles installed. Therefore, the application range of the pile can be very wide, for example, by replacing the existing foundation with the pile foundation, which has been used as the foundation or the foundation for the excellent economy.

Further, when a self-diameter pile capable of forming an enlarged part of the design standard is used in the various strata of the present invention, a separate drill for the diameter reduction is not necessary.

In addition, since the pile enlarging portion continuous to the magnifying lenshole is constituted immediately during the cutting operation of the magnifying orifice provided in a part of the pile main body, there is no fear that the pile wall of the magnifying hole is relaxed or collapsed during the magnifying operation, It is possible to form a continuous pile enlargement part of the pile, so that the maximum pile bearing capacity can be obtained. Since the cutting section provides a pile enlarged section having a dimension accurately designed without excessive cutting, the bearing capacity and the pulling resistance can be greatly increased with a minimum amount of cutting work and a minimum amount of expansion.

In addition, material cost can be reduced by forming a hollow orifice that cuts the diameter hole to a large diameter with a concrete material.

Further, according to the present invention, the hardenable joint filler completely filled in the quadrangular pyramid integrates all members of the quadrangular pyramid, thereby greatly improving the durability of the expandable body.

In addition, according to the present invention, it is possible to form a continuous pile enlargement part not only in the perforated pile but also in the field drilled pile and the type pile, thus enabling economical construction.

FIG. 1 is a perspective view of a self-diameter pile according to an embodiment of the present invention,
FIG. 2 is a perspective view showing the expanded state of FIG. 1,
Figs. 3A to 3B are cross-sectional structural diagrams of the present invention,
4 is a detailed view of an enlarged support portion of the present invention,
5 is an enlarged detail view of the present invention,
6 is a configuration diagram of an expander according to another embodiment of the present invention;
7 is a detailed view of a sub-expander of the present invention.
8 is a cross-sectional view of Fig. 7,
Fig. 9 is a cross-sectional view showing a configuration for pressing the expander with the pressing body. Fig.

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

1 to 3B are a perspective view and a sectional view showing a state before and after expansion of a self-diameter pile according to an embodiment of the present invention.

The self-diameter pile of the present invention can be applied to an existing pile such as a steel pipe pile, a PHC pile, an H-shaped pile, a synthetic pile or a compound pile, Do.

In the present invention, a piercing mouth (2) capable of forming a pile enlarged portion on a part of a pile main body when piles are installed in the ground is provided. That is, the pile of the present invention comprises a pile body and a part of the pile body, preferably the pile body, and the pile body is supported by the pile body through a pile enlarged portion formed by the pile 2, And to secure additional supporting force.

The piercing mouth 2 of the pile may be formed as a unitary body that moves integrally with the pile body. Alternatively, the pile body may be separated from the pile body and act independently of the pile body.

When the pile body and the piercing mouth 2 are integrally formed, the piercing mouth 2 rotates by the rotation of the pile body. When the piercing body 2 is formed as a separate type, the piercing mouth 2 rotates separately to cut the piercing.

1 and 2, the extender 2 of the present invention includes a plurality of extensions 6 forming radially expanded pile-shaped portions, And an extended support portion 12 for guiding the expansion direction of the plurality of expanders 6 and transmitting the upper load to the lower ground portion of the pile enlargement portion. The extended support portion 12 includes an upper plate member 14, Wherein the plurality of expanders 6 are made of a bonding material so as to have a flat shape in a storage space of the expander 6 outside the intermediate support portion 18 before expansion, And a rotary cutting tip (4) for diameter cutting is mounted on the outside of the expander (6).

The expansion body 6 of the present invention is a permanent reinforcement of the pile enlargement unit in an enlarged state when the pile including the pile enlargement unit is completed.

The piercing mouth 2 constituting a part of the pile enlargement part of the present invention is provided with upper and lower plate bodies 14 and 16 and a rotary cutting tip 4 is provided between the upper and lower plate bodies 14 and 16 Thereby constituting the formed extender 6. Rotation of the mouthpiece 2 may rotate the body of the pile on the ground or rotate the mouthpiece 2 separately.

The main body 8 and the auxiliary bodies 8 and 10 are composed of a main expandable body 8 and a subsidiary body 10 and the main body 8 and the auxiliary bodies 8 and 10 are made of a curable joint filler such as concrete or grout, When a nano-based composite material such as an ultrahigh strength alloy material or a graphene-metal composite material is used, the strength of the expander 6 is increased to reduce the amount of cutting, and a continuous pile expanding portion having a substantially flat surface is formed.

6, it is also possible to form the expansion body 6 with a plate of steel material. When the expansion body 6 is manufactured by using a composite material based on a nodular material, the fracture strength is 2,000 MPa. The thickness of the extension body 6 can be reduced to 5 mm or less.

In the present invention, the auxiliary expander 10 is provided between the main expanders 8 so that the auxiliary expander 10 is located in the space formed by the expansion of the main expander 8, Thereby making it possible to constitute a pile enlarging portion with a clearance. It is possible to support a large external force acting on the pile enlargement part as the main expansion body 8 and the auxiliary expansion bodies 8 and 10 are continuously formed with no gaps in plan view, It is also possible to prevent the water from entering the inside of the mouthpiece 2.

5, due to the radial expansion of the main extension 8 horizontally, the main extension 8 is horizontally moved radially and horizontally along with the auxiliary extension catch groove 38 formed on the top of the main extension 8. [

There are two methods of rotating the drill hole 2 for rotating drilling of the drill hole 2: a method of rotating the pile directly, and a method of rotating the drill hole 2 only with the rotation of the pile being prevented, It is also possible to rotate in one direction or to repeat forward rotation and reverse rotation.

The intermediate supporting portion 18 of the portion constituting the extended supporting portion 12 is positioned between the upper plate member 14 and the lower plate member 16 to form an expander accommodating space 20, To the ground.

The fact that the extended support part 12 is made in one body means that the upper plate body 14, the lower plate body 16 and the intermediate support part 18 are separately manufactured and assembled by one member instead of separately manufacturing them.

In the present invention, a curable joint filler can be processed and injected in order to fabricate the folded paper portion as one body, or can be integrally formed using a 3D printer.

3A and 3B, the expander 6 of the present invention forms an inclined surface 36 at the rear and is radially expanded by the pressing body 26 pressing the inclined surface 36. As shown in FIG.

The pressing member 26 may form an additional pressing portion 28 as shown in FIG. 9 so as to enlarge the expansion range of the expanding member 6 to adjust the extending range of the expanding member 6.

A joining filler material automatic feed line 24 for injecting a joining filler material which can be cured into the mouth piece 2 is formed in the upper portion of the extension body 6 and the extension body 6 is pressed by the pressurizing body 26 So that the joint filler pressure chamber 22 formed by the radial expansion is automatically filled with the joint filler material.

Figs. 7 to 8 are perspective views of a mouthpiece 2a according to another embodiment of the present invention.

The corrugated mouth 2a of the present invention is formed in a conical shape in its bottom portion and a screw portion and a cutting tip are formed on the outer surface of the conical portion so that the bottom surface of the perforated hole can be cut due to the rotation of the corrugated mouth 2a.

8, which is a cross-sectional view of the mouth mouth 2a shown in Fig. 7, a fluid pressure chamber for slime discharge (see Fig. 32 are formed, and the expansion body 6 moves in the horizontal direction as the fluid pressure supplied from the ground is supplied.

The fluid which is supplied to the fluid pressure chamber 32 and pushes the expander 6 forms a fluid transfer passage for discharging the slime between the expander accommodating spaces 20 to rapidly discharge the slurry cut by the fluid pressure It is also possible.

In the present invention, it is necessary to confirm that the formation of the pile enlarged portion by extension of the expansion body 6 is completed. To this end, in the present invention, the movement distance of the expander 6 is checked, or as the expander 6 expands, it is sensed by the contact of the aperture 2a and the sensor (not shown) provided on the expander 6 And confirming that the extension is completed through the method of confirming that the height from the pull string of the pressing body 26 which moves downward and presses the extension body 6 in a radial direction to the distal end of the pressing body 26 is completed .

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments. Therefore, the scope of the present invention should not be limited by the described embodiments but should be determined by the equivalents of the claims and the claims.

(2) (2a) - point of sharpening (4) - rotary cutting tip
(6) - extension body (8) - main extension body
(10) -unit extension (12) -extension support
(14) - an upper plate body (16) - a lower plate body
(18) - intermediate support (20) - expansion body storage space
(22) - Joint filling material pressure chamber (24) - Joint filling material automatic supply line
(26) - pressing body (28) - additional pressing portion
(30) - fluid pressure supply passage (32) - fluid pressure chamber for slime discharge
(34) - stopper (36) - slope
(38) - Coupling extension groove

Claims

For piles installed in the ground,
(2) (2a) capable of forming a pile enlarged portion on a part of a pile main body,
(2) and (2a) extend radially to guide a plurality of expanders (6) forming a pile enlarged portion and an expanding direction of the plurality of expanders (6) And the extended support part 12 is formed by the upper plate body 14, the lower plate body 16 and the intermediate support part 18 and is filled with a hardenable joint filling material into a mold, And the plurality of extensions 6 are arranged on the plane of the enlargement accommodating space 20 outside the intermediate support portion 18 before expansion and are arranged on the plane of the enlargement body 6, Characterized in that a rotary cutting tip (4) for cutting is mounted.

For piles installed in the ground,
(2) (2a) capable of forming a pile enlarged portion on a part of a pile main body,
(2) and (2a) extend radially to guide a plurality of expanders (6) forming a pile enlarged portion and an expanding direction of the plurality of expanders (6) And the extended support part 12 is formed as a body using a 3D printer and is composed of an upper plate body 14, a lower plate body 16 and an intermediate support part 18, The plurality of expanders 6 are arranged in a plane on the enlargement accommodating space 20 outside the intermediate support portion 18 before expansion and the rotary cutting tip 4 for the diameter cutting is disposed outside the expander 6, Is mounted on the inner surface of the pile.

For piles installed in the ground,
(2) (2a) capable of forming a pile enlarged portion on a part of a pile main body,
(2) and (2a) extend radially to guide a plurality of expanders (6) forming a pile enlarged portion and an expanding direction of the plurality of expanders (6) And the extended support portion 12 is composed of an upper plate member 14, a lower plate member 16 and an intermediate support portion 18, (6) are made of a nano-based composite material having a breaking strength of 2,000 MPa or more, and the expanding bodies (6) are arranged so as to be flush with the expanding body accommodating space (20) outside the intermediate supporting portion Featuring self-diameter pegs.

4. The method according to any one of claims 1 to 3,
Characterized in that the said extensions (6) comprise a plurality of main extensions (8) radially extending to form a clear pile enlargement and a plurality of main extensions (8) And a plurality of secondary expansion bodies (8) for forming a continuous pile expansion section.

4. The method according to any one of claims 1 to 3,
A joint filler pressure chamber 22 is provided at the core of the extended support portion 12 and a joint filler material passage is formed between the pressure chamber and the expansion body accommodating space 20 and the pressure of the curable joint filler Characterized in that the plurality of extensions (6) are radially expanded and the joint filler is automatically filled in an empty space through which the expander (6) has escaped.

4. The method according to any one of claims 1 to 3,
A fluid pressure chamber 32 for discharging a slime is provided in a deep portion of the extended support portion 12 and a fluid passage for slime discharge is formed between the pressure chamber and the expansion body accommodating space 20, Wherein the extensions (6) of the punches (6) expand radially and rapidly eject the slimmed cut slices.

4. The method according to any one of claims 1 to 3,
And a pressing body (26) radially expanding the extension body (6) by contact with the rear end slope surface (36) of the extension body (6). Optionally, the pressing body (26) Further comprising an additional pressing portion (28) capable of expanding the extension range.

4. The method according to any one of claims 1 to 3,
Wherein a lower portion of the hollow shaft (2) (2a) is formed in a conical shape, and optionally has at least one of a threaded portion and a cutting tip on the outer surface of the conical shape.

A method of constructing a pile installed in the ground,
(2) 2a for forming a pile enlarged portion is inserted into a piercing hole in the ground to radially expand the main expansion body 8 and the auxiliary expansion body 8, ) Of the main expansion body (8) and the secondary expansion body (8) to guide the expanding direction of the main expansion body (8) so as to increase the supporting area of the pile .

10. The method of claim 9,
Sensing the movement distance of the expander 6 and sensing that a particular portion of the expander 6 passes through a specific position of the mouthpiece 2 or 2a, And confirming that the radial expansion of the expansion body (6) is completed by one of the methods of confirming that the specific portion to the tip of the pile (26) passes the specific height of the pile.