KR20150131995A

KR20150131995A - Piles with an extended head and construction method thereof

Info

Publication number: KR20150131995A
Application number: KR1020150066858A
Authority: KR
Inventors: 임성대
Original assignee: (주)삼일이엔씨
Priority date: 2014-05-14
Filing date: 2015-05-13
Publication date: 2015-11-25

Abstract

The present invention relates to a pile expansion type pile which can greatly increase the allowable bearing capacity of a pile by forming a pile enlargement part at the same time as a pile cutting edge is rapidly cut from various ground layers using a simple equipment without a separate drilling drill and its construction method Lt; / RTI >
The pendulum of the present invention is composed of a pile body and a punch body which is coupled to the bottom of the pile body and is rotated together with the rotation of the pile body to expand its diameter by the pressing body. A guide pipe integrally protruding from the central upper surface of the base member, the guide pipe having an upper open portion and a plurality of entry / exit openings formed on an outer circumferential surface so that the presser can enter the upper portion; A coupling member fixedly coupling the guide pipe to the inside of the pile body; And a wing portion provided on the outer side of the base member and the lower portion of the pile body, the wing portion being provided at a rear end of the wing portion and having one end passing through the entry / exit holes of the guide pipe, An expanding body formed by a pushing portion that slides to the outside of the guide tube by the guide portion and expands the wing portion to the outside; . &Lt; / RTI >

Description

Technical Field [0001] The present invention relates to a pile-

The present invention relates to a pile expansion type pile which can greatly increase the allowable bearing capacity of a pile by forming a pile enlargement part at the same time as a pile cutting edge is rapidly cut from various ground layers using a simple equipment without a separate drilling drill and its construction method Lt; / RTI >

The pile supports the load of the upper structure. For the pile construction, the process of forming a hole in the ground should be preceded.

The perforation hole can adopt various construction methods according to the ground conditions and the pile diameter, and there is a great variation in air and construction cost depending on which construction method is adopted.

Generally, the pile supports the structure by the end bearing force and the main surface friction force. In order to secure the sufficient pile holding capacity, a method of increasing the end bearing capacity by expanding the pile tip can be considered.

In order to expand the tip of the pile, it is necessary to perform vertical drilling to the rock layer with a straight drill and to drill the end of the drilled hole with a separate drill. After removing the residual slime at the tip of the hole, stabilize the air hole of the hole, and then place the concrete in the enlarged space of the pile to form the concrete reinforcement.

However, this conventional technique has a drawback that it is difficult to prevent the air hole of the aperture hole from being relaxed or collapsed, in addition to a large amount of equipment to be used, a large amount of perforation. Also, since slime and groundwater coexist in the pile enlargement space, it is difficult to guarantee the excellent quality of concrete.

On the other hand, there is a technique for a PHC pile in which a reinforcing plate expanding the tip of the pile itself is integrated by coupling a reinforcing plate having an outer diameter larger than that of a concrete column so that one end of the PC steel wire penetrates the lower end of the concrete column (Japanese Patent Application No. 10-1150854 number).

However, since the reinforcing plate is attached to the bottom of the pile, the tip of the pile itself is already enlarged, so that the extension diameter of the pile tip is difficult to be larger than the diameter of the hole. In addition, it is difficult to apply in hard ground, and when the whole hole is formed with increased diameter of the pile tip, the portion except the tip of the pile becomes excessive hole, which causes air and construction cost to increase greatly.

In this case, a technique has been proposed in which the tip of the pile can be partially extended by using a vertical drilling hole having the same diameter as the drill body and a drill for ground drilling capable of expanding the perforation hole in a stepwise manner (Japanese Patent Application Laid-Open No. 10-2013-0057161).

However, in the case of excavating the ground using the technique of the above-mentioned patent, it takes a long time and it is difficult to proceed in a place where the equipment is large and narrow.

The present invention relates to a pile expansion method using a simple equipment without a separate drill and to rapidly increase the allowable bearing capacity of the pile by forming a pile enlarging portion at the same time as the pile cutting edge is rapidly cut in various strata. .

SUMMARY OF THE INVENTION [0006] The present invention is directed to providing a pendulum having a small diameter and a small diameter, and a method of constructing the pendulum.

The present invention provides a pendulum expandable at the same time as a piling enlargement part is formed to prevent the air hole of the diameter hole from being relaxed or collapsed, and a construction method thereof.

The present invention provides a pendulum expandable type that can form a pile enlarged portion with a simpler structure and a method of constructing the pendulum.

According to a preferred embodiment of the present invention, there is provided a pendulum pendulum, comprising a pendulum body, a pendulum body coupled to a lower portion of the pendulum body, A base member; A guide pipe integrally protruding from the central upper surface of the base member, the guide pipe having an upper open portion and a plurality of entry / exit openings formed on an outer circumferential surface so that the presser can enter the upper portion; A coupling member fixedly coupling the guide pipe to the inside of the pile body; And a wing portion provided on the outer side of the base member and the lower portion of the pile body, the wing portion being provided at a rear end of the wing portion and having one end passing through the entry / exit holes of the guide pipe, An expanding body formed by a pushing portion that slides to the outside of the guide tube by the guide portion and expands the wing portion to the outside; The present invention provides an end-extended pile.

According to another preferred embodiment of the present invention, the coupling member is a plurality of partition members connecting the inner surface of the pile body and the outer surface of the guide pipe.

According to another preferred embodiment of the present invention, the pile body is divided into a lower member to which the hollow shaft is coupled and an upper member to be coupled to the upper portion of the lower member.

According to another preferred embodiment of the present invention, a stepped portion is formed at the upper end of the lower member, and the lower end of the upper member is engaged with the stepped portion.

According to another preferred embodiment of the present invention, a thread is formed on the lower outer circumferential surface of the upper member, and a female screw thread is formed on the inner circumferential surface of the step of the lower member to screw the upper member and the lower member. .

According to another preferred embodiment of the present invention, the coupling member is formed to protrude from the outer circumferential surface of the guide tube and is threaded on the outer circumferential surface thereof, and is screwed to a female thread formed on the inner circumferential surface of the pile body.

According to another preferred embodiment of the present invention, the engaging member is protruded from the outer circumferential surface of the guide tube and is in contact with the inner circumferential surface of the pile body, and is coupled to the pile body by a fastening member outside the pile body.

According to another preferred embodiment of the present invention, the partition member is provided at a position of each extension member, the lower end of the partition member is protruded to a predetermined length below the pile main body, and the lower end of the partition member is inserted Wherein the enlarged guide groove is formed in an extending direction of the expansion body.

According to another preferred embodiment of the present invention, a plurality of guide rail portions, which are protrusions or grooves, are formed at the lower end of the pile main body in the extending direction of the expander, and a groove portion And an enlarged guide section is formed to be a projection.

According to another aspect of the present invention, there is provided a pendulum main body comprising a pile body, a piercing body coupled to a bottom of the pile body, A base member; A guide pipe integrally protruding from the central upper surface of the base member, the guide pipe having an upper open portion and a plurality of entry / exit openings formed on an outer circumferential surface so that the presser can enter the upper portion; An upper guide member coupled to the upper portion of the guide tube and having an upper through hole at the center thereof; A wing portion provided between the base member and the upper guide member and having a cutting hole formed on the outer side thereof and a wing portion provided at a rear end of the wing portion and having one end penetrating the entrance and exit holes of the guide pipe, An expanding body formed by a pushing portion that slides to the outside of the guide tube by the guide portion and expands the wing portion to the outside; The present invention provides an end-extended pile.

According to another preferred embodiment of the present invention, the upper guide member is coupled to a reinforcing member fixed to the pile body and coupled to the pile body.

According to another preferred embodiment of the present invention, a plurality of coupling holes are formed around the upper through-hole of the upper guide member to receive the end of the reinforcing member.

According to another preferred embodiment of the present invention, the distance between the upper guide member and the base member increases toward the outside.

According to another preferred embodiment of the present invention, the base member is provided with an inclined surface inclined upwards from the bottom surface.

According to another preferred embodiment of the present invention, at least one of the upper surface of the upper guide member and the upper surface of the base member is provided with a guide rail portion, which is a protruding portion or a groove portion, in the extending direction of the expanding member, And the corresponding portion is formed with an extension guide portion which is a groove portion or a stone portion engaging with the guide rail portion.

According to another preferred embodiment of the present invention, the wing portion of the expansion body is inclined when the thickness of the wing portion decreases toward the outer side.

According to another preferred embodiment of the present invention, the base member is provided with a plurality of support vanes protruding outward from the base member at the lower portion of each of the expanders to support the lower portion of the expander, .

According to another preferred embodiment of the present invention, the wing portion of the extension body is thickened toward the outer side in the expansion direction.

According to another preferred embodiment of the present invention, the cutting peg is a water jet spraying nozzle for spraying either a cutting tip or high pressure water, flame or hot water.

According to another preferred embodiment of the present invention, a bottom through hole is formed at the center of the base member, and a conical penetration portion is formed at a lower portion of the base member. .

According to another preferred embodiment of the present invention, an injection hole is formed at the lower end of the conical penetration section, and the injection hole is provided with a stopper for selectively closing the injection hole, wherein the injection hole has a step formed at a lower portion thereof, Is provided with a guide rod inserted into the injection hole and a hook formed at a lower end of the guide rod and having a diameter enlarged to be caught by the step portion.

According to another preferred embodiment of the present invention, the conical penetration portion is coupled with the base member so as to be separated from the base member by pressurization in the hollow interior.

According to another preferred embodiment of the present invention, the upper end of the conical penetration portion is formed with a fitting portion which is fitted in the lower through-hole of the base member and has a cut-out portion at a position corresponding to the entry / exit hole of the guide pipe, Is provided with a stopper portion which is caught on the bottom surface of the base member.

According to another preferred embodiment of the present invention, the extensible pile has a larger outer diameter than the outer diameter of the pile body.

According to another aspect of the present invention, there is provided a method of constructing the end-expanding pile, comprising the steps of: (a) forming a perforation hole in the ground; (b) inserting a tip expanding pile, which is coupled to the bottom of the pile body, into the perforation hole; And (c) pressing the end of the pressing portion by inserting a pressing body into the guide tube while rotating the probe, so that the expanding body is extended to the outside of the mouth opening while cutting the ground; The method of constructing the end-expanding pile according to claim 1,

According to another preferred embodiment of the present invention, there is provided a method for constructing the end-expanding pile, comprising the steps of: (a) forming a perforation hole in the ground; (b) inserting a magnifying glass into the lower portion of the perforation hole; (c) inserting a pressing member into the guide tube while pressing the end of the pressing member while rotating the magnifying glass, so that the expanding member expands outside the magnifying glass while cutting the ground; And (d) forming concrete pouring holes by pouring concrete into the open top of the pour point; The method of constructing the end-expanding pile according to claim 1,

According to another preferred embodiment of the present invention, there is provided a method for constructing the end-expanding pile, the method comprising the steps of: (a) selecting a type of end-expanding pile to which a borehole is coupled at the bottom of the pile body, Inserting; And (b) pressing the end of the pressing portion by inserting a pressing body into the guide tube while rotating the circular opening, so that the expanding body is extended to the outside of the circular opening while cutting the ground; The method of constructing the end-expanding pile according to claim 1,

The present invention has the following effects.

First, it is possible to enlarge the diameter of the piercing hole which is connected to the lower part of the pile without extra drilling drill, so that pile enlargement can be formed at the same time as cutting the pile ending ground rapidly in various strata from the soil layer to the hard rock layer. Therefore, it is possible to minimize the pile yield and optimize the excavation depth because the allowable bearing capacity of the pile is greatly increased. Therefore, it can be widely applied to foundry piles of various architectural and civil engineering structures with excellent economic efficiency.

Secondly, it is possible to expand the pile enlargement volume only locally so that the amount of ground penetration can be minimized. In addition, since the horizontal radially extending cutting tip can provide a designed cross-section of the pile enlarged portion without excessive cutting, it is possible to greatly increase the supporting force and the pulling resistance by the minimum amount of cutting work and the minimum amount of expansion.

Third, since the hardened continuous pile enlargement part is constructed during the cutting operation of the cutting tip coupled with the expander, the air hole of the diameter hole does not relax or collapse during the operation.

Fourth, efficient use of space is possible by the use of compact equipment.

Fifth, when the cone penetration part is provided at the lower part of the base member, it is possible to prevent the lower slime from being introduced into the puncture needle at the initial stage of pressurization, and the lower soil density can be increased by discharging the filler through the injection hole after pressurization.

Sixth, since the extension body is slidingly guided between the bottom of the pile main body and the base member, the construction is simple and easy to manufacture, maintain and manage.

Seventh, when the base member and the guide pipe are integrally formed and the upper guide member is separately manufactured and assembled, the lower edge plate of the PHC pile can be utilized as the upper guide member.

Eighth, it is easy to penetrate the base member when the slope is inclined upwards toward the outer side. In addition, if the wing portion of the expander is made thinner toward the outer side, if it is configured to be inclined, it is possible to prevent the expander from dropping out along with the increase of the cutting speed.

Ninthly, when the support member for supporting the lower portion of the expander is formed in the base member, the amount of steel material required for manufacturing the hollow pipe can be saved, which is economical.

In the tenth case, when the outer diameter of the piercing hole is larger than the outer diameter of the pile body, a certain space is formed between the pile body and the surrounding ground.

1 is a perspective view of an expanding pile at the tip of the present invention.
Fig. 2 is a perspective view of a part of a quadrant showing an embodiment of a coupling member. Fig.
FIG. 3 is a perspective view of a portion of a quadrant showing an alternative embodiment of a coupling member; FIG.
Fig. 4 is a perspective view of a magnifying glass showing an extension before and after expansion of the extension. Fig.
5 is a view showing an embodiment of an extensible pile of the present invention including a pile body separated by upper and lower members.
6 is a view showing another embodiment of the present invention extended pile including a pile main body separated by upper and lower members.
7 and 8 are perspective views showing the coupling relation between the lower end of the pile body and the expander.
Fig. 9 is a perspective view showing another embodiment of a magnifying glass; Fig.
10 is a cross-sectional perspective view of an expandable pile at the tip of the present invention with a reinforcing member.
11 is a sectional view showing the coupling relation between the lower end of the pile main body and the expander.
12 is a bottom perspective view of an extension body having an extension guide portion.
FIG. 13 is a perspective view of a magnifying glass provided with a supporting blade. FIG.
FIG. 14 is a bottom perspective view of an extension body in which the upper and lower surfaces of the wing portion are parallel; FIG.
15 is a sectional view showing a coupling relation between the lower end of the pile main body and the expander.
16 is a perspective view of an expander showing various embodiments of a cutting tip;
FIG. 17 is a view showing an end-extended pile of the present invention having a conical penetration part. FIG.
18 is a longitudinal sectional view of an expanding pile at the tip of the present invention showing a conical penetration portion which is removed by the pressurization of the filler material.
19 illustrates another embodiment of a conical penetration;

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

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an expandable pile at the tip of the present invention. FIG.

As shown in FIG. 1, the end-expanding pile of the present invention is coupled to the bottom of the pile body 10 and the pile body 10 and is rotated together with the rotation of the pile body 10, And an expanding mouth 20.

The pile body 10 may be composed of a plain concrete pile or a steel pipe pile, and the pile body 20 is rotatable according to the rotation of the pile body 10. [ In this case, along with the rotation of the pile body 10, the expanding body 24 of the piercing mouth 20 expands radially to form a pile enlarged portion.

In addition, the pile body 10 may be constructed of a cast-in-place pile. In this case, the piercing body 20 is first rotated separately from the pile body 10 to cut the ground to a small diameter, and then the pile body 10 is installed later.

The piercing mouth 20 quickly forms a pile enlarged portion having a diameter larger than that of the pile body 10 at the tip of the pile without a separate drilling drill. The base member 21, the guide pipe 22, 23 and an extension body 24. [

The base member 21 is located at the bottom of the mouthpiece 20 and is provided at the center of the base member 21 as shown in Figure 10 (b) A hole 214 may be formed.

The base member 21 and the pile body 10 guide the expansion of the extension body 24 provided therebetween in the horizontal direction.

The guide pipe 22 is formed integrally with the central upper surface of the base member 21 so that the upper portion of the guide pipe 22 is opened to allow the presser body 30 to enter the upper portion and the plurality of entry and exit holes 221 are formed on the outer circumferential surface thereof.

The guide pipe (22) is fixedly coupled to the inside of the pile body (10) by a coupling member (23). Various embodiments of the coupling member 23 are described with reference to Figs. 2 and 3. Fig.

The extension body 24 is provided between the base member 21 and the bottom of the pile main body 10 and is composed of a wing portion 241 and a pressing portion 243.

The wing portion 241 and the pressing portion 243 may be integrally formed or separated from each other, and a plurality of widening bodies 24 may be provided.

The wing portion 241 has a cutter 242 formed on the outer side thereof for cutting the ground.

The pressing portion 243 is provided at the rear end of the wing portion 241 and one end of the pressing portion 243 is positioned in the guide pipe 22 through the entry / exit hole 221 of the guide pipe 22, The wing portion 241 is extended to the outside by slidingly moving to the outside of the guide pipe 22 by pressurization.

Therefore, when the pressing body 30 presses the pressing portion 243 inside the guide tube 22, the pressing portion 243 slides out of the guide tube 22 through the entry / The wing portion 241 located at the front end of the pressing portion 243 extends between the upper surface of the base member 21 and the lower end of the pile body 10 together with the expansion body 24, So that the diameter of the mouthpiece 20 is enlarged.

The expanded body 24 is expanded after the completion of the pile construction, and serves as a permanent reinforcing member of the pile enlargement unit.

As a result, it is possible to economically construct the pile by minimizing the number of piles and optimizing the depth of excavation since the allowable bearing capacity of the pile is greatly increased by securing the end support force. In addition, the amount of ground penetration can be minimized because the expansion of the pile is only locally extended. Therefore, it can be widely applied to foundry piles of various architectural and civil engineering structures with excellent economic efficiency.

The extension body 24 can cut the ground by a pressing force by the impact or vibration of the pressing body 30 and the rotational force of the pile body 10. Therefore, the ground cutting speed is fast and the ground can be cut in various layers ranging from the soil layer to the rock layer.

Fig. 2 is a perspective view of a part of a quadriceps shown in the embodiment of the joining member. Fig.

2 (a) to 2 (b), the coupling member 23 can be formed of a plurality of partition members connecting the inner surface of the pile body 10 and the outer surface of the guide pipe 22. As shown in FIG.

In this case, the pile main body 10 is composed of a steel pipe pile.

The partition member may be arranged in a vertical direction as shown in FIG. 2 (a), or may be arranged in a horizontal direction as shown in FIG. 2 (b).

The inner end of the partition wall member is integrally coupled to the guide pipe 22 and the outer end of the partition wall member is welded to the inner surface of the pile body 10 to join the pile body 10 and the guide pipe 22. [

The partition member should be coupled to the inlet / outlet hole 221 formed in the guide pipe 22 so as not to interfere with each other. In the embodiment of FIG. 2, the entry / exit holes 221 are disposed at a portion between the partition member and the base member 21.

Figure 3 is a perspective view of a portion of the quadriceps shown in another embodiment of the joining member.

3 (a), the coupling member 23 is protruded from the outer circumferential surface of the guide pipe 22, and a thread 231 is formed on the outer circumferential surface of the guide pipe 22, As shown in Fig.

The pile body 10 and the guide pipe 22 can be coupled by threading the thread 231 of the outer circumferential surface of the coupling member 23 and the female thread of the inner circumferential surface of the pile body 10. [

In this case, the welding operation can be omitted, unlike the embodiment of FIG. 2, so that defects due to welding can be eliminated and the safety of the operator can be secured.

3 (b), the coupling member 23 protrudes from the outer circumferential surface of the guide pipe 22 and is in contact with the inner circumferential surface of the pile body 10, It is possible to constitute the pile body 10 to be coupled with the pile body 10 by the pile body 10.

A bolt (B) can be used as an example of the fastening member.

In this case, a through hole is formed in the pile body 10 so that the bolt B can pass therethrough. On the outer circumferential surface of the coupling member 23, a bolt hole is formed in the inner circumferential surface so that one end of the bolt B can be inserted. (H).

Fig. 4 is a perspective view of a magnifying glass showing the enlargement of the extension body before and after expansion.

2, when the coupling member 23 is a partition wall member, the partition member is provided at a position of each extension member 24, the lower end of the partition member is protruded to a lower portion of the pile body 10 by a predetermined length, An extension guide 244, which is a groove for inserting the lower end of the partition member, may be formed on the upper surface of the extension body 24 in the extending direction of the extension body 24.

Figs. 4 (a) and 4 (b) respectively show the magnifying lens 20 before and after the expansion body 24 is extended.

4 (a) and 4 (b), when the lower end of the partition member is extended downward to the extended guide portion 244 of the expander 24, The sliding direction is stably guided.

5 is a view showing an embodiment of the present invention extended pile including a pile main body separated by upper and lower members.

5 and 6, the pile main body 10 is divided into a lower member 11 to which the sprue 20 is coupled and an upper member 12 to be coupled to the upper portion of the lower member 11, .

When the coupling member 23 is a partition wall member as shown in FIG. 2, the outer end of the partition wall member must be welded to the inside of the pile main body 10.

Therefore, when the pile main body 10 is divided into the upper member 12 and the lower member 11, the partition member is welded to the inside of the lower member 11 and then the lower member 11 and the upper member 12 are joined have.

5 (b), the upper member 12 and the lower member 11 are also weldable (W).

FIG. 6 is a view showing another embodiment of the present invention extended pile including a pile main body separated by upper and lower members.

As shown in FIG. 6, a step portion 111 may be formed on the upper end of the lower member 11 so that the lower end of the upper member 12 is seated on the step portion 111.

The stepped portion 111 stably couples the upper member 12 to the upper portion of the lower member 11.

The vertical load of the upper member 12 is smoothly transmitted to the lower member 11 by the step portion 111. [

A screw thread 121 is formed on a lower outer circumferential surface of the upper member 12 and a female thread 112 is formed on an inner circumferential surface of a side surface of the step portion 111 of the lower member 11, (11) can be screwed together.

In this case, as in the sectional view shown in Fig. 6 (b), the upper member 12 and the lower member 11 are simply screwed together, so that welding defects and deformation due to welding are not caused.

Figs. 7 and 8 are perspective views showing the coupling relation between the lower end of the pile body and the expander.

A plurality of guide rail portions 13 and 14 are formed at the lower end of the pile main body 10 in the extending direction of the pile body 10, 13 and 14, the enlarged guide portions 244 and 245, which are grooves or protrusions, can be formed.

7, the guide rail portion 13, which is the lower end of the pile body 10, is inserted into the extension guide portion 244, which is a groove portion formed on the upper surface of the extension body 24, Direction can be guided.

The extension guide 245 which is a stone formed on the upper surface of the extension 24 and the guide rail 14 which is the groove of the lower end of the pile main body 10 are engaged with each other, Can be guided.

Fig. 9 is a perspective view showing another embodiment of the magnifying glass.

The present invention provides a pendulum pendulum having a pendulum body 10 coupled to a lower portion of a pendulum body 10 and having a diameter enlarged by a pressing body 30 while being rotated together with rotation of the pendulum body 10 (20) comprises a base member (21); A guide pipe 22 integrally protruded from a central upper surface of the base member 21 and having an upper opening and an upper opening and a plurality of entrance and exit holes 221 formed at an upper portion thereof so that the pressing body 30 can enter the upper portion; An upper guide member 25 coupled to an upper portion of the guide pipe 22 and having an upper through hole 251 formed at the center thereof; And a wing portion 241 provided between the base member 21 and the upper guide member 25 and having a cutter 242 formed on the outer side thereof and a wing portion 241 provided at the rear end of the wing portion 241, Is inserted into the guide tube 22 through the entry and exit hole 221 of the guide tube 22 and is slid to the outside of the guide tube 22 by the pressurization of the pressing body 30 to press the wing portion 241 outward An extension body 24 made up of a portion 243; . &Lt; / RTI >

In this case, unlike the end-expanding pile shown in Fig. 1, the end-expanding pile is constructed such that as shown in Fig. 9, the piercing mouth 20 is supported by the base member 21, the guide pipe 22, the upper guide member 25, (24).

The guide pipe 22 may be fitted in the upper through hole 251 of the upper guide member 25 and may have a stepped portion at the upper end thereof to support the upper guide member 25.

The guide tube (22) and the upper guide member (25) can be screwed or welded.

Particularly, in the case of screw connection, threads can be formed in the inner side of the upper through hole 251 of the upper guide member 25 and the upper side outer surface of the guide pipe 22, and they can be screwed together.

The base member 21 and the guide tube 22 may be integrally formed by injection molding or 3D printer, and the upper guide member 25 may be separately manufactured and assembled.

In the case of a prestressed high-strength concrete pile, which is a high-strength prestressed concrete pile produced by centrifugal molding, the lower edge plate can be utilized as the upper guide member 25.

9 and the end expandable pile including the same as shown in FIG. 9 have the same structure as that of FIG. 1 except that the upper guide member 25 is used instead of the engaging member 23, same.

10 is a cross-sectional perspective view of an expandable pile at the tip of the present invention having a reinforcing member.

10 (b), the upper guide member 25 may be coupled with a reinforcing member 26 fixed to the pile body 10 and coupled to the pile body 10.

The reinforcing member 26 may serve as a tension member for applying a prestress to the pile body 10 in the PHC file, and may be formed of a steel wire or a steel bar.

In this case, the upper guide member 25 may serve as a reinforcing plate of the tip of the pile body 10.

A plurality of the reinforcing members 26 may be provided along the outer circumferential surface of the guide pipe 22.

10A, a plurality of coupling holes 252 are formed around the upper through-hole 251 of the upper guide member 25 to receive the end of the reinforcing member 26, .

The lower end of the reinforcing member 26 passes through the fitting hole 252 and is engaged with the upper guide member 25 so that the upper end of the reinforcing member 26 is positioned inside the pile body 10. [

As shown in FIGS. 10B and 11, an enlarged head portion is formed at the lower end of the reinforcing member 26, and the fitting hole 252 is formed by the insertion hole into which the head portion is inserted and the reinforcing member 26 And a fixing hole in which the head portion is engaged can be formed in a connected state.

As described above, since the base member 21 and the upper guide member 25 can be manufactured separately, the coupling hole 252 can be easily inserted into the upper guide member 25.

11 is a cross-sectional view showing the coupling relation between the lower end of the pile body and the expander.

The distance between the upper guide member 25 and the base member 21 can be increased toward the outer side.

11, the base member 21, in which the wing portion 241 of the extension member 24 is housed, becomes closer to the end side of the upper guide member 25 when t ₁ <t ₂ , And the upper guide member 25, the extension member 24 can be easily extended outward.

In addition, the base member 21 may be formed with an inclined surface 211 whose bottom surface is inclined upwards.

Since the lower soil is pushed around by the inclined surface 211 when hitting, it is easy to penetrate the ground.

The inclined surface 211 can be formed on the end-expanding pile including the deep hole shown in FIG. 1 or FIG.

12 is a bottom perspective view of the extension body having the extension guide portion.

9 and 12, at least one of the lower surface of the upper guide member 25 and the upper surface of the base member 21 has a protruding portion or a recessed portion in the extending direction of the expander 24, An extension guide 246 may be formed at a portion of the extension body 24 corresponding to the guide rail portion 212. The extension guide portion 246 may be a groove or a projection which engages with the guide rail portion 212. [ have.

The extensible pile 24 is rotated in the direction opposite to the rotation due to the resistance of the surrounding ground because the widened pile 24 is extended while the widened portion 241 of the enlarged body 24 is being cut by cutting the surrounding ground. So that the ground can not be properly identified.

However, when the guide rail portion 212 and the extension guide portion 246 are engaged with each other as described above, the extension body 24 is extended in a straight line exactly in the direction of expanding the outer peripheral surface of the pile, So that it can be guided stably.

9 shows a guide rail portion 212 having a groove shape formed on the upper surface of the base member 21 and an enlarged guide portion 246 having a projecting portion formed on the lower surface of the extension member 24 in FIG.

Of course, the guide rail portion 212 may be formed on the lower surface of the upper guide member 25 and the extension guide portion 246 may be formed on the upper surface of the extension member 24. The upper surface of the base member 21 and the upper guide member 25, It is also possible to form the guide rail portion 212 on the lower surface and to form the extended guide portion 246 on the lower surface and the upper surface of the extension body 24, respectively.

As shown in FIG. 12, the wing portion 241 of the extension body 24 may be inclined when the thickness of the wing portion 241 decreases toward the outer side.

If the end portion of the wing portion 241 is thinned, the cutting speed during the expansion work can be increased.

If the lower surface of the wing portion 241 is inclined or inclined downward toward the end of the wing portion 241, the extension member 24 slips outward due to the impact or vibration of the base member 21, .

However, if the end portion of the wing portion 241 is made thinner and more specifically, the wing portion 241 is inclined upwardly toward the end portion of the wing portion 241, the wedge portion 241 may be extended by the striking or vibration of the base member 21 It is possible to prevent the body 24 from falling off by itself.

The shape of the wing portion 241 may be applied to the end-expanding pile including the quadrangular pyramid shown in FIG. 1 or FIG.

14 is a bottom perspective view of an extension body having upper and lower wings parallel to each other, and FIG. 15 is a sectional view showing a coupling relationship between a lower end of a pile body and an expander .

13 (a) to 13 (b), the base member 21 is formed on the outer side of the base member 21 at the lower portion of each of the expanders 24 so as to support the lower portion of the expander 24 A plurality of support vanes 213 may be formed.

That is, the base member 21 is provided only in the lower portion of the expansion body 24, not in the form of a disk, so that the amount of steel material required for manufacturing the sharp mouth 20 can be saved.

In this case, as shown in FIG. 14, the wing portion 241 of the expander 24 is configured such that the portion of the support wing 213 is thicker in parallel up and down to prevent the support wing 213 from being deformed upward desirable.

The configuration of the support vane 213 is applicable to the end-expanding pile including the dental drill shown in Fig. 1 or Fig.

As shown in FIG. 15, when the support vane 213 is provided, the wing portion 241 of the extension member 24 can be configured to have a thickness that increases toward the outer side in the expansion direction.

Since the plurality of support vanes 213 are separated from each other, the rigidity is low. As a result, when the pile is hammered, the support vane 213 is bent upward to make it difficult to expand the extension body 24.

Therefore, if the wing portion 241 of the widening body 24 is inclined so that t ₃ <t ₄ , the widening body 24 can be easily extended outward even if the wing 213 is deformed.

16 is a perspective view of an expander showing various embodiments of a cutting tip;

16 (a) to 16 (b), the cutting tool 242 may be a cutting tip 242a or a water jet spray nozzle 242b for spraying either high-pressure water, flame or hot water Can be configured.

The cutting tool 242 may be formed by a cutting tool 242a as shown in FIG. The cutting tip 242a can cut the ground to a desired dimension, thereby making it possible to form the cross-section of the pile enlarged with a designed dimension.

The cutting tool 242 may be constituted by a water jet spray nozzle 242b as shown in FIG. 16 (b), or may be configured to include both the cutting tip 242a and the water jet spray nozzle 242b Do.

The water jet injection nozzle 242b is supplied with either high pressure water, flame, or hot water from the supply line 40 shown in FIG. 4 (a) to FIG. Cut.

FIG. 17 is a longitudinal sectional view of an extended pile of the present invention having a conical penetration part, and FIG. 18 is a longitudinal sectional view of the enlarged pile of the present invention showing a conical penetration part which is dropped off by pressurization of a filler.

10 (b), 17, and the like, a lower through hole 214 through which the pressing body 30 passes is formed at the center of the base member 21, And a conical penetration part 50 having a smaller diameter toward the lower part may be coupled to the lower part.

The conical penetration portion 50 is connected to communicate with the lower through hole 214 at the center of the base member 21 and has a conical shape in which the side surface and the bottom surface are closed so that the pile can be easily inserted into the ground.

The configuration of the conical penetration portion 50 is applicable to the end-expanding pile including the deep-drawn pits shown in FIG. 1 or FIG.

17 (a) to 17 (c), an injection hole 51 is formed at the lower end of the conical penetration part 50, and an injection hole 51 is formed in the injection hole 51 And a stopper 511 is formed at a lower portion of the injection hole 51. The stopper 52 is provided with a guide rod 521 inserted into the injection hole 51, And a latching part 522 formed at the lower end of the guide rod 521 and having a diameter enlarged to be caught by the stepped part 511.

Accordingly, when the pile is inserted, the latching portion 522 of the stopper 52 is caught by the step portion 511 of the injection hole 51, thereby preventing the lower slime from flowing into the dental mouthpiece 20 b)).

After the pile penetration, the filler material 60 is injected into the hole 20 and the plug 52 moves outward by the pressure of the filler material 60 to open the injection hole 51 )). As a result, the filler material 60 flows out to the outside through the injection hole 51, so that the ground density can be increased.

The conical penetration part 50 may be fixedly coupled to the base member 21 but may be fixed to the base member 21 and the base member 21 so as to be separated from the base member 21 by the pressure in the deep- Can be combined.

The conical penetration portion 50 is separated from the base member 21 when the conical penetration portion 50 is pressurized by the filler material 60 or pressurized by the pressurizing body 30 in the mouthpiece 20.

Then, since the filler material 60 flows into the pile under the separated gap, the density of the pile lower ground can be increased to form a hard bulb.

19 is a view showing another embodiment of the conical penetration.

19 (a) to 19 (b), the upper end of the conical penetration portion 50 is fitted into the lower through-hole 214 of the base member 21, A stopper portion 54 is formed at the lower end of the fitting portion 53. The stopper portion 54 is engaged with the bottom surface of the base member 21 at a position corresponding to the entry / exit hole 221 .

In the absence of the fitting part 53, if the pressure of the filling material 60 is not constant, only one side of the conical penetration part 50 may be separated and the filling material 60 may be injected unevenly.

The fitting part 53 serves to connect the conical penetration part 50 with the mouthpiece 20 and serves as a guide for stably separating the conical penetration part 50 downward.

The cutout portion 531 is a passage through which the pressurizing portion 243 of the expander 24 is moved and the cutout portion 531 is formed in the cutout portion 531 before the conical penetration portion 50 is completely separated from the open mouth 20, (60) to be injected into the lower ground prematurely.

The stopper 54 prevents the conical penetration 50 from being pushed into the mouthpiece 20 when penetrating.

1, 11, 17, and the like, the outer diameter before the diametrically opposed opening 20 is larger than the outer diameter of the pile body 10.

The method of pile driving is such as pile driving method from the beginning, pile up to the middle layer through the upper buried layer or all the bed layers, penetrating the pile up to the middle layer, and then penetrating the pile to the supporting layer by pile driving.

Generally, when rotating the piercing body 20 by rotating the pile body 10 from the pile driving pile, there is no space between the pile body 10 and the surrounding ground, so that the pile body 10 is rotated as the pile depth becomes longer it's difficult.

In this case, if the outer diameter of the piercing body 20 is made larger than the outer diameter of the pile body 10, a space is formed between the outer peripheral surface of the pile body 10 and the surrounding ground, .

Next, a method of constructing the end-expanding pile of the present invention will be described.

The pendulum body 10 of the present invention may be formed of an existing pile or a cast-in-place pile.

(A) forming a perforation hole in the ground, (b) disposing the bore hole 20 on the bottom surface of the pile body 10, and And then inserted into the perforation hole.

At this time, the perforation hole can be formed by various methods such as boring or striking.

Thereafter, (c) the pressing body 30 is inserted into the guide tube 22 while rotating the mouthpiece 20 to press the end of the pressing portion 243, so that the expanding body 24 cuts the ground, 20).

After expanding the mouth opening 20, the pressurizing body 30 is recovered and the filling space is filled in the empty space in the pile to finish the construction.

The method of constructing the end-expanding pile can be applied to the end-expanding pile including the piercing hole shown in FIG. 1 or FIG.

In the case where the pile body 10 is a ground drilled pile, in the method of constructing the end-extended pile of the present invention, (a) a perforation hole is formed in the ground, (b) .

(C) While pushing the end of the pressing portion 243 by inserting the pressing body 30 into the guide pipe 22 while rotating the magnifying orifice 20, the expanding body 24 cuts the ground, ).

Finally, (d) Concrete is poured into the upper part of the spout 20 to form a cast-in-place pile.

In the step (d), reinforcing materials such as reinforcing net and FRP may be installed before concrete is poured.

The method of constructing the end-expanding pile is applicable to the end-expanding pile including the piercing hole shown in FIG.

The method of constructing the end-expanding pile of the present invention comprises the steps of: (a) inserting a tip-expanding pile having a borehole 20 coupled to the bottom of the pile body 10 into the ground by a type, ; And (b) pressing the end of the pressing portion 243 by inserting the pressing body 30 into the guide pipe 22 while rotating the circular mouth 20, so that the extending body 24 cuts the ground, ); As shown in Fig.

10: pile body 11: bottom member
111: step jaw 112: female thread
12: upper member 121:
13: guide rail part 14: guide rail part
20: Dislocation hole 21: Base member
211: slope surface 212: guide rail part
213: support blade 214: lower through-
22: guide tube 221: entry and exit ball
23: coupling member 231:
24: Extension body 241:
242: cutting tool 242a: cutting tip
242b: injection nozzle 243:
244: extension guide part 245: extension guide part
246: extension guide portion 25: upper guide member
251: upper through hole 252: engaging hole
26: reinforcing member 30: pressing body
40: feed line 50: conical penetration
51: Injection hole 511:
52: plug 521: guide rod
522: Retaining part 53:
531: cut-out portion 54: stopper portion
60: Filler B: Bolt
H: Bolt hole W: Welding

Claims

A pile of the present invention includes a pile body 10 and an extensible pile 20 which is coupled to the bottom of the pile body 10 and is rotated together with the rotation of the pile body 10 to expand the diameter by the pressing body 30 As a result,
The mouthpiece 20 includes a base member 21; A guide pipe 22 integrally protruded from a central upper surface of the base member 21 and having an upper opening to allow the pressurizing body 30 to enter the upper portion and a plurality of entry and exit holes 221 on the outer peripheral surface; A coupling member 23 for fixing the guide pipe 22 to the inside of the pile body 10; And
A wing portion 241 formed between the base member 21 and the lower portion of the pile main body 10 and having a cutter 242 formed at the outer side thereof and a wing portion 241 provided at the rear end of the wing portion 241, And the guide member 22 is located in the guide pipe 22 and slides out of the guide pipe 22 by the pressure of the pressing member 30 so that the wing portion 241 is extended to the outside An extension body 24 made up of an elastic body 243; Of the pile.

The method of claim 1,
Wherein the coupling member (23) is a plurality of partition members connecting the inner surface of the pile body (10) and the outer surface of the guide pipe (22).

3. The method of claim 2,
Characterized in that the pile body (10) is divided into a lower member (11) to which the sprue (20) is coupled and an upper member (12) to be coupled to the upper part (11).

4. The method of claim 3,
Wherein a step portion (111) is formed on the upper end of the lower member (11) so that the lower end of the upper member (12) is seated on the step portion (111).

5. The method of claim 4,
A screw thread 121 is formed on the lower outer circumferential surface of the upper member 12 and a female thread 112 is formed on the inner circumferential surface of the step portion 111 of the lower member 11 to connect the upper member 12 and the lower member 11) are threadedly coupled.

The method of claim 1,
Wherein the coupling member is protruded from the outer circumferential surface of the guide tube and has threads 231 formed on the outer circumferential surface thereof and is threadedly engaged with a female thread formed on the inner circumferential surface of the pile body.

The method of claim 1,
Characterized in that the engaging member (23) is protruded from the outer circumferential surface of the guide tube (22) and is in contact with the inner circumferential surface of the pile body (10) and is engaged with the pile body (10) Expandable pile.

The method according to any one of claims 2 to 5,
The lower end of the partition member is protruded to a lower portion of the pile main body 10 by a predetermined length and the lower end of the partition member is inserted into the upper surface of the extension member 24, Wherein the extension guide (244) is formed in the extension direction of the extension body (24).

8. The method according to any one of claims 1 to 7,
A plurality of guide rail portions 13 and 14 are formed at the lower end of the pile main body 10 in the extending direction of the pile body 10, (244, 245), which are grooves or projections engageable with the projections (13, 14).

A pile of the present invention includes a pile body 10 and an extensible pile 20 which is coupled to the bottom of the pile body 10 and is rotated together with the rotation of the pile body 10 to expand the diameter by the pressing body 30 As a result,
The mouthpiece 20 includes a base member 21; A guide pipe 22 integrally protruded from a central upper surface of the base member 21 and having an upper opening and an upper opening and a plurality of entrance and exit holes 221 formed at an upper portion thereof so that the pressing body 30 can enter the upper portion; An upper guide member 25 coupled to an upper portion of the guide pipe 22 and having an upper through hole 251 formed at the center thereof; And
A wing portion 241 formed between the base member 21 and the upper guide member 25 and formed with a cutter 242 at the outer side thereof and a wing portion 241 provided at the rear end of the wing portion 241, 22 which is located in the guide tube 22 and slides out of the guide tube 22 by the pressure of the pressing body 30 so as to expand the wing portion 241 to the outside, An extension body 24 made up of an elastic body 243; Of the pile.

11. The method of claim 10,
Wherein the upper guide member (25) is coupled to a reinforcing member (26) fixed to the pile body (10) and coupled with the pile body (10).

12. The method of claim 11,
Wherein a plurality of engaging holes (252) are formed around the upper through hole (251) of the upper guide member (25) to receive the end of the reinforcing member (26).

11. The method of claim 10,
Wherein an interval between the upper guide member (25) and the base member (21) increases toward the outside.

The method according to claim 1 or 10,
Wherein the base member (21) is formed with an inclined surface (211) which is inclined upward to the outside.

11. The method of claim 10,
A guide rail portion 212 is formed on at least one of the lower surface of the upper guide member 25 and the upper surface of the base member 21 in the extending direction of the extending member 24, Is formed at a portion corresponding to the guide rail portion (212) of the guide rail portion (212), which is a groove portion or a protrusion portion engaged with the guide rail portion (212).

The method according to claim 1 or 10,
Wherein the wing portion (241) of the expander (24) is inclined when the thickness is made thinner toward the outside.

The method according to claim 1 or 10,
The base member 21 is provided at the lower portion of each extension body 24 so as to support the lower portion of the extension body 24, Wherein a plurality of support vanes (213) protruding outward are formed.

The method of claim 17,
Wherein the wing portion (241) of the extension body (241) is thicker toward the outer side in the expansion direction.

The method according to claim 1 or 10,
Characterized in that the cutting tool (242) is a cutting tip (242a) or a water jet spray nozzle (242b) for spraying either high pressure water, flame or hot water.

The method according to claim 1 or 10,
A lower through hole 214 through which the pressing member 30 penetrates is formed at the center of the base member 21 and a conical penetration portion 50 whose diameter becomes smaller downward is formed at the lower portion of the base member 21 Wherein the first and second piles are coupled to each other.

20. The method of claim 20,
The injection hole 51 is formed at the lower end of the conical penetration part 50 and the injection hole 51 is provided with a stopper 52 for selectively closing the injection hole 51, The stopper 52 is formed at the lower end of the guide rod 521 and inserted into the injection hole 51. The diameter of the guide rod 521 is enlarged, And an engagement portion (522) engaged with the step portion (511).

20. The method of claim 20,
Wherein the conical penetration part (50) is engaged with the base member (21) so as to be separated from the base member (21) by the pressure inside the sharp hole (20).

The method of claim 22,
The upper end of the conical penetration part 50 is fitted into the lower through hole 214 of the base member 21 and the incision part 531 is formed at a position corresponding to the entry / exit hole 221 of the guide pipe 22 Wherein a stopper portion (54) is formed at the lower end of the lower end of the fitting portion (53) to catch the lower surface of the base member (21).

The method according to claim 1 or 10,
And the outer diameter of the pore hole (20) is larger than the outer diameter of the pile body (10).

A method of constructing an end-expanding pile according to claim 1 or 10,
(a) forming a perforation hole in the ground;
(b) inserting a tip-expanding pile having a piercing hole (20) coupled to the bottom of the pile body (10) into the perforation hole; And
(c) While pushing the end of the pressing portion 243 by inserting the pressing body 30 into the guide pipe 22 while rotating the mouth opening 20, the expanding body 24 cuts the ground, Expanding to outside; Wherein the pile is constructed to include a plurality of piles.

A method of constructing an end-expanding pile according to claim 10,
(a) forming a perforation hole in the ground;
(b) inserting the mouthpiece 20 into the lower part of the perforation hole;
(c) While pushing the end of the pressing portion 243 by inserting the pressing body 30 into the guide pipe 22 while rotating the mouth opening 20, the expanding body 24 cuts the ground, Expanding to outside; And
(d) forming an excavated pile by pouring concrete into the upper portion of the piercing mouth 20; Wherein the pile is constructed to include a plurality of piles.

A method of constructing an end-expanding pile according to claim 1 or 10,
(a) inserting a tip-extended pile having a piercing mouth 20 coupled to the bottom of the pile body 10 into the ground by one of a type, a press-in or a rotation-piercing; And
(b) While pushing the end of the pressing portion 243 by inserting the pressing body 30 into the guide tube 22 while rotating the mouth opening 20, the expanding body 24 cuts the ground, Expanding to outside; Wherein the pile is constructed to include a plurality of piles.