KR20150017079A

KR20150017079A - Coupling apparatus for non-welding of pile

Info

Publication number: KR20150017079A
Application number: KR1020130092905A
Authority: KR
Inventors: 김병철; 김기웅
Original assignee: 김기웅; 김병철
Priority date: 2013-08-06
Filing date: 2013-08-06
Publication date: 2015-02-16

Abstract

The present invention relates to a piling device, in which a connection pin provided on an upper pile is fitted to a PC nut of a pile disposed below, and the connection pin is fixed to a side of a PC nut, The pile is pushed in the direction of the pile located at the lower part by making the coupling pier and the connecting pin engage with each other in a wedge shape so that the upper and lower piles are tightly connected with each other with high strength. The present invention provides a pile driving apparatus capable of stably connecting a pile.
According to an aspect of the present invention, there is provided a pile comprising: a connection pin having one end connected to a tip end of an upper pile, and the other end having an engagement recess formed in a concave shape around an outer circumferential surface; A nut body portion which is installed to be embedded along the circumferential direction of the concrete pile at the head portion of the concrete pile located at the lower portion and is formed with a steel wire catching jaw inside one end for fixing the steel wire, And a side nut portion protruding from the side surface of the nut body portion and protruding from the outside of the concrete pile so as to communicate with the inside of the nut body portion; And a coupling hole inserted through the side nut portion of the second PC nut at the outer side of the concrete pile located at the lower portion to be coupled to the coupling groove of the coupling pin to connect the piles located above and below. do.

Description

[0001] The present invention relates to a pile-

The present invention relates to a non-welded joint of a pile, in which a connection pin and a coupling hole are provided through a PC nut provided at the tip of the pile and a head of the pile, whereby a pile can be quickly joined without a separate welding process To a coupling device.

Generally, when a construction or civil engineering structure is to be applied to a soft ground, a pile connected to the support layer from the ground surface is used so as to secure the stability of the structure by transferring the load of the structure to the support layer.

The support layer for pile construction is located at a depth of several tens of meters from the surface of the ground. In case of piles, the pile is made up to 15 m or less in length for convenience of production and transportation. .

On the other hand, the PHC pile is manufactured by introducing the prestressed pre-tensioned concrete high-strength concrete pile fabricated by centrifugal force. The PHC pile is resistant to bending resistance, vertical force and horizontal force It has excellent features and is widely used when it is required to construct structures on soft ground because it can be constructed by using piling method and pre-boring method.

On the other hand, a protective cap made of metal is provided at the tip and head of the pile to be paired with each other for the coupling between PHC piles, and a cap installed at the head of the lower pile and an upper pile The joints between the piles are made by welding around the circumference of the two caps.

However, there is a difference in quality depending on the conditions of the worksite, the weather, and the skill of the worker where the work is actually performed. Therefore, it is inevitably necessary to have a skilled welder having a high cost, There is a problem that the durability (quality deterioration) of the cap is lowered by the welding residual stress due to the long (actual working time is short). In addition, it is difficult to maintain the quality beyond a predetermined level, and thus there are problems in paying a large cost for quality control.

In consideration of the above problems, various methods of performing the joint operation between a pile and a pile have been proposed. However, the conventional joint apparatus used in the costly pile joint method is not easy to manufacture and construct due to its complicated structure, There is a problem that the pile head and the tip of the pile must be separately machined

Registration No. 10-0835777

SUMMARY OF THE INVENTION In order to solve the above problems, an object of the present invention is to fix a connecting pin provided on an upper pile to a PC nut of a lower pile, fix the connecting pin to a coupling port provided on a side surface of a PC nut The pile can be quickly joined without a separate welding process and the pile is pushed in the direction of the pile located at the lower part by engaging the coupling and the connecting pin in the form of wedge so that the upper and lower piles are tighter and higher in strength The present invention provides a pile driving apparatus that enables stable and economical pile connection.

According to an aspect of the present invention, there is provided a pile of the present invention, wherein one end of the pile is coupled to one end of the upper pile and the other end of the pile is recessed in a circumferential direction Connecting pin; A nut body portion which is installed to be embedded along the circumferential direction of the concrete pile at the head portion of the concrete pile located at the lower portion and is formed with a steel wire catching jaw inside one end for fixing the steel wire, And a side nut portion protruding from the side surface of the nut body portion and protruding from the outside of the concrete pile so as to communicate with the inside of the nut body portion; And a coupling hole inserted through the side nut portion of the second PC nut at the outer side of the concrete pile located at the lower portion to be coupled to the coupling groove of the connection pin to connect the piles positioned above and below.

The coupling pin may include a coupling pin inserted through the side nut portion and having a locking protrusion formed at an end thereof so as to be engaged with a coupling groove of the coupling pin. And a pressing bolt which is screwed to the side nut portion and presses the engaging pin toward the connecting pin so that the engaging pin is engaged with the connecting pin.

A guide groove is formed in an inner peripheral surface of the side nut portion along a longitudinal direction of the side nut portion and a guide protrusion is formed on an outer circumferential surface of the engaging pin so as to be inserted into the guide groove so that the engaging pin is not rotated inside the side nut portion, So that it can be inserted into the main body.

The lower surface of the engaging groove formed on the connecting pin is formed to be inclined downward from the inside of the connecting pin toward the outside, and the lower surface of the engaging projection has an inner side from the inside of the engaging projection so as to correspond to the lower surface of the engaging groove And the lower surface of the engaging projection of the engaging pin is engaged with the lower surface of the engaging groove of the connecting pin in a wedge-shaped manner.

The connecting pin may include a pin body inserted into the second PC nut and having the latching groove formed along an outer circumferential surface thereof; And a threaded portion formed integrally on an upper end of the pin body and having a threaded portion formed on an outer circumferential surface thereof so as to be screwed onto an upper pile, wherein a diameter of the pin body is larger than a diameter of the threaded portion Is formed.

And a pressure plate attached to the outside of one end of the second PC nut to disperse the load applied to the second PC nut.

And further includes a plurality of shear projections formed to project from the support plate to improve adhesion to the concrete.

And a plurality of through holes formed in the pressure plate to improve the filling efficiency of the concrete poured in the production of the concrete pile.

The second PC nut is attached to the outside of the other end of the second pillar so as to correspond to the pivot plate so that the second PC nut is parallel to the pivot plate during the automatic feeding of the second PC nut by the conveyor during pile manufacturing, And a plate.

And a mounting bolt coupling part protruding from the side surface of the nut body part of the second PC nut for temporarily fixing the concrete pile when the pile is jointed by the piercing method, .

And a head reinforcement cap installed to surround the head and the head of the concrete pile to reinforce the head and the head of the concrete pile, and the head reinforcement cap, wherein the head reinforcement cap is attached to the head of the concrete pile A reinforcing band formed at a predetermined height along the edge of the ring member to enclose the outer circumferential surface of the concrete pile and a reinforcing band protruding from the reinforcing band inward of the concrete pile so that the side nut portion of the second PC nut is fitted and fixed And a sleeve for allowing the sleeve to be rotated.

Also, the pile located at the upper part is a concrete pile, and the connection pin is fastened to a plurality of first PC nuts which are installed at predetermined intervals along the circumferential direction of the pile at the tip of the concrete pile to fix the steel wire.

And a first PC nut attached to the outside of the other end of the first PC nut so as to be attached to the first PC nut so that a first PC nut is attached to the first end of the first PC nut, A plurality of shear projections are formed on the support plate so as to improve the adhesion of the concrete to the concrete, so that the filling efficiency of the concrete placed at the time of making the concrete pile can be improved A plurality of through holes are formed.

Also, the pile located at the upper portion is a steel pipe pile, and the connection pin is fastened to a reinforcing ring having a plurality of nut holes formed horizontally at the tip of the steel pipe pile and fastening the connection pin.

As described above, according to the present invention, it is possible to easily perform the joint construction of the upper and lower piles only by simple construction through the connection of the connection pin and the coupling hole, so that it is possible to easily and quickly construct even an unskilled worker.

Also, since the coupling pin of the coupling hole is engaged with the coupling pin in the form of a wedge, the upper pile is pulled in the direction of the lower pile so that the upper and lower piles are more tightly connected to each other with higher strength, It is effective.

In addition, it is a very useful invention which can reduce the construction cost and shorten the construction time because the pile can be jointed in the state where the pile is temporarily installed during the joint construction process by the pile excavation method.

1 is an exploded perspective view showing a joint structure of a concrete pile according to a first embodiment of the present invention,
FIG. 2 is a perspective view showing a joint structure of a concrete pile according to a first embodiment of the present invention. FIG.
3 is a cross-sectional view showing a jointing process of a concrete pile according to a first embodiment of the present invention,
FIG. 4 is a sectional view showing a joint state of a concrete pile according to a first embodiment of the present invention, FIG.
FIG. 5 is an exploded perspective view showing a coupling structure of the first and second PC nuts, the connecting pin,
6 is a perspective view showing a modified example of the connection pin of the present invention,
FIG. 7 is a perspective view showing a state in which a first pc nut and a second PC nut of the present invention further include a pressure plate and a conduction preventing plate;
8 is a cross-sectional view showing a state in which a first pc nut and a second pc nut of the present invention further include a pressure plate and a conduction preventing plate,
FIG. 9 is a bottom perspective view of a concrete pile according to the present invention in which a second PC nut is installed on a head reinforcement cap, FIG.
FIG. 10 is a cross-sectional view showing a state where a head reinforcing cap and a head reinforcing cap are installed on a concrete pile according to the first embodiment of the present invention,
FIG. 11 is a cross-sectional view of a concrete pile according to a first embodiment of the present invention in which a mounting bolt coupling portion is further formed in a second PC nut. FIG.
12 is an exploded perspective view showing a joint structure between a concrete pile and a steel pipe according to a second embodiment of the present invention;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

1 is a perspective view showing a joint structure of a concrete pile according to a first embodiment of the present invention, FIG. 2 is an assembled perspective view showing a joint structure of a concrete pile according to a first embodiment of the present invention, and FIG. FIG. 4 is a cross-sectional view showing a joint state of a concrete pile according to a first embodiment of the present invention, FIG. 5 is a cross- And a coupling structure of a coupling hole,

As shown in the drawing, the present invention includes a first PC nut 100 installed at predetermined intervals along the circumferential direction of a concrete pile 10 at the tip of a concrete pile 10 positioned at an upper part thereof, A second PC nut 200 mounted so as to be embedded in a circumferential direction of the pile at a head portion of the concrete pile 10 located at the lower portion so as to correspond to the first PC nut 100 and the second PC nut 100, The connection pin 300 is inserted into the second PC nut 200 from the outside of the concrete pile 10 located at the lower part and inserted into the second PC nut 200, And a coupling hole 400 for coupling the concrete pile 10 located above and below the pile.

The first PC nut 100 is configured such that a steel wire hook 110 is formed at one side of the first PC nut 100 so as to fix a steel wire 11 having a thread on the inner circumferential surface thereof and being disposed inside the concrete pile 10. [

The second PC nut 200 includes a nut body 210 having a threaded portion formed on an inner circumferential surface thereof and having a steel wire hook 211 formed at one end thereof for fixing the steel wire 11, And a side nut part 220 protruding from the side of the nut body part 210 so as to communicate with the inside of the nut body part 210 and allowing the coupling part 400 to be fastened.

The second PC nut 200 may be manufactured by integrally forming the nut body portion 210 and the side nut portion 220 or by screwing the nut body portion 210 on one side of the side surface of the side nut portion 220 It can be manufactured in a prefabricated form.

The connection pin 300 is formed in a cylindrical shape so as to be inserted into the second PC nut 200 and has a recess 320 formed in a concave shape along the circumference of the outer circumferential surface so that the coupling hole 400 can be hooked A screw body 330 formed integrally with the upper end of the pin body 310 and having a threaded portion formed on an outer circumferential surface thereof so as to be screwed into the first PC nut 100, .

The tip of the pin body 310 is rounded so that the connection pin 300 can be inserted into the second PC nut 200 more easily.

The upper surface 322 of the latching groove 320 is inclined upwards from the inside to the outside of the connection pin 300 so that when the connection pin 300 is inserted into the second PC nut 200, When the upper surface 322 of the second PCB 200 is hooked on the upper portion of the second PCB 200, it can be easily inserted by being slid by the inclined surface.

The lower surface 321 of the latching groove 320 is formed to be inclined downward from the inner side of the connecting pin 300 so that a coupling port 400 to be described later can be engaged with the latching groove 320 in a wedge- .

6, when the diameter of the pin body 310 is larger than the diameter of the threaded portion 330 and the connection pin 300 is screwed to the first PC nut 100, Only the screw coupling part 330 is coupled to the inside of the first PC nut 100 and the pin body 310 is hooked to the first PC nut 100 so that the coupling depth of the connection pin 300 can be limited.

The depth of the connection pin 300 fastened to the first PC nut 100 is limited so that the depth at which the pin body 310 of the connection pin 300 is inserted into the second PC nut 200 is kept constant, The engagement position of the engagement groove 400 of the body 310 with the engagement groove 320 is maintained to be constant so that the stable pile joint construction is performed.

The engaging hole 400 is inserted through the side nut portion 220 and is engaged with the engaging groove 320 of the connecting pin 300 so that a locking protrusion 411 protrudes from the end of the engaging groove 400. [ The pin 410 is screwed into the inside of the side nut portion 220 so as to press the coupling pin 410 toward the coupling pin 300 so that the coupling pin 410 is inserted into the coupling pin 300 of the coupling pin 300, (320) so that the joints of the piles located above and below can be formed.

The pressing bolt 420 is easily rotated through the washer 430 between the coupling pin 410 and the pressing bolt 420 so that the pressing force can be improved.

On the other hand, the end of the locking protrusion 411 forms a recess 413 and is inserted into the locking recess 320 through the recess 413, So that it can be wrapped tightly.

As the locking protrusion 411 is hooked on the connecting pin 300, the fastening force of the connecting pin 300 through the coupling hole 400 is improved, so that the fastening strength of the piles positioned on the upper and lower sides is increased, .

The lower surface 412 of the locking protrusion 411 is inclined upwards from the inner side of the locking protrusion 411 so as to be in contact with the lower surface 321 of the locking recess 320 and to be engaged with the wedge- do.

The lower surface 412 of the locking protrusion 411 and the lower surface 321 of the connection pin 300 are engaged with each other in the form of wedge in the process of fastening the coupling pin 410 and the coupling pin 300, The concrete pile 10 located at the lower portion is pulled down by the lower portion of the concrete pile 10 when the pin 410 and the connection pin 300 are coupled to each other to firmly engage the concrete pile 10 .

The pressing bolt 420 may be a wrench bolt so that the pressing bolt 420 can be completely inserted into the side nut portion 220 while pressing the coupling pin 410 in the direction of the connecting pin.

In this way, the wrench bolt is completely inserted into the side nut portion 220, thereby preventing the interference of the head of the bolt with the pile during the process of piling the pile after the pile is jointed, so that the pile can be easily inserted into the ground.

A guide groove 221 is formed along the longitudinal direction of the side nut 220 on the inner circumferential surface of the side nut part 220 and the guide groove 221 is formed on the outer circumferential surface of the engagement pin 410, The guide protrusion 414 is inserted so that the engaging pin 410 can be inserted into the connecting pin 300 while being rotated without being rotated inside the side nut portion 220.

The engagement pin 410 is inserted into the guide groove 221 of the side nut part 220 through the guide protrusion 414 so that the engagement protrusion 411 of the engagement pin 410 is inserted into the engagement groove 320 So that it can be fitted accurately.

Therefore, the fitting operation of the connection pin 300 through the coupling pin 410 is simple and quick, and the period of the pile joint construction can be shortened.

Meanwhile, the guide protrusion 414 and the guide groove 221 may be formed in various shapes such as a circular or triangular shape in cross section.

FIG. 7 is a perspective view showing a state in which a first PC nut and a second PC nut are further provided with a pressure plate and a conduction preventing plate, FIG. 8 is a perspective view showing a first PC nut and a second PC nut, Sectional view showing a state in which it is installed,

The first PC nut 100 and the second PC nut 200 are attached to the outside of the other side of the other end so that the load applied to the first PC nut 100 and the second PC nut 200 can be dispersed. ).

The first and second PC nuts 100 and 200 have a circular metal plate that is larger than the diameter of the first PC nut 100 and the second PC nut 200. The first PC nut 100 and the second PC nut 200 have external forces When the load is applied by the punching shear, It prevents cracks in concrete.

In addition, a plurality of shear projections 501 are further formed on the pressure plate 500 to improve adhesion with concrete.

The shear protrusions 501 improve the adhesion of the concrete to the concrete piles 10 to thereby form the first PC nut 100 and the fixing bolts installed on the second PC nut 200 The first PC nut 100 and the second PC nut 200 are prevented from rotating in the concrete in the process of removing the bolts (not shown) for fixing the first and second PC nuts 100 and 200.

In addition, a plurality of through holes 502 are formed in the pressure plate 500 to allow concrete to flow in both the front and rear of the pressure plate 500 when the concrete is poured to produce the concrete pile 10, Fill the concrete.

The shearing protrusions 501 and the through holes 502 may be formed by cutting a part of the pressure plate 500 and protruding the incised portion by bending the incised portion outwardly so as to form the shearing protrusion 501, Hole 502 can be formed.

The first PC nut 100 and the second PC nut 200 are attached to the outside of the other side of the other end of the first PC nut 100 and the second PC nut 200 so that the first PC nut 100 and the second PC nut 200 are connected to the pressure plate 500 (Not shown) to prevent conduction by the conductive plate 510.

The conduction preventing plate 510 is configured to have the same diameter as the pressure plate 500. The first PC nut 100 and the second PC nut 200 are automatically supplied through the conveyor in the process of manufacturing the concrete pile, Since the diameter of the pressure plate 500 is larger than the diameter of the first and second PC nuts 100 and 200 when the first and second PC nuts 100 and 200 are attached to the first and second PC nuts 100 and 200, The first PC nut 100 and the second PC nut 200 can not be maintained in a horizontal state but are inclined so that the first PCB nut 100 And the second PC nut 200 can be maintained in a horizontal state while facing each other. Thus, the concrete pile 10 can be manufactured more easily.

9 and 10, the present invention further includes a head reinforcement cap 700 installed to surround the head and the head of the concrete pile 10 to reinforce the head and the head of the pile, and a tip reinforcement cap 600 .

The end reinforcing cap 600 includes a ring member 610 attached to the tip of the concrete pile 10 to protect a portion of the concrete pile 10 contacting the pile 1010, And a reinforcing band 620 formed at a predetermined height to cover the outer circumferential surface of the tip end of the concrete pile 10. [

The head reinforcing cap 700 includes a ring member 710 attached to the head of the concrete pile 10 to protect a portion of the concrete pile where the concrete pile abuts, A reinforcing band 720 formed at a predetermined height to cover the outer circumferential surface of the concrete pile 10 and a reinforcing band 720 formed in the reinforcing band 720 to protrude inward of the concrete pile 10, And a sleeve 730 that allows the nut part 220 to be fitted and fixed.

The sleeve 730 is configured such that the side nut portion 220 can be fitted in the process of positioning the second PC nut 200 when the concrete pile 10 is manufactured, So that the portion 220 can be positioned toward the outside of the pile.

11, the temporary fixing bolt 240 is protruded from the side surface of the nut body 210 of the second PC nut 200 to fix the pile at the bottom of the pile when the pile is coupled. And a mounting bolt connecting portion 230 for mounting the mounting bolt.

The temporary bolt connecting part 230 is fastened to the temporary mounting bolt 240 by fastening the temporary mounting bolt 240 in the process of jointing the pile when the pile is installed through the preliminary boring method, So that the upper pile can be jointed to the lower pile while the pile is temporarily mounted on the casing.

Meanwhile, at the time of manufacturing the concrete pile 10, three or four second PC nuts 200 including the mounting bolt coupling part 230 are installed at regular intervals, and concrete piles (for example, 10 to be temporarily installed.

When the mounting bolt coupling part 230 is further formed on the second PC nut 200 as described above, the mounting bolt coupling part 230 may be inserted into the head reinforcing cap 700, It is preferable to further form the sleeve 730 to be fitted.

12 is an exploded perspective view showing a joint structure between a concrete pile and a steel pipe according to a second embodiment of the present invention. As shown in the drawing, it is possible to jointly connect the concrete pile 10 and the steel pipe pile 20 of the present invention .

At this time, the concrete pile 10 located at the lower part is configured the same as the concrete pile 10 according to the first embodiment.

The steel pipe pile 20 is provided with a horizontal reinforcing ring 21 at its tip so that the connecting pin 300 can be installed and a nut hole for mounting the connecting pin 300 to the reinforcing ring 21 22).

The second PC nut 200 of the concrete pile 10 located at the lower side of the concrete pile 10 in the state where the connection pin 300 is installed in the nut hole 22 formed in the reinforcement ring 21 of the steel pipe, The connection pin 300 is inserted through the side nut portion 220 of the second PC nut 200 so that the connection pin 300 is engaged with the connection pin 300 to connect the steel pipe pile 20 and the concrete pile 10. [ Joint construction is performed.

The jointing process of the concrete pile 10 using the pile jointless joint of the present invention having the above structure will now be described.

First, an excavation hole is formed in the ground, and the concrete pile 10 is inserted into the excavation hole and fixed.

Then, the connection pin 300 is coupled to the first PC nut 100 at the tip of the concrete pile 10 to be jointed. At this time, the connection pin 300 is screwed to the first PC nut 100 and the pin body 310 is exposed to the outside of the first PC nut 100.

Since the pin body 310 is configured to have a larger diameter than the diameter of the threaded portion 330 when the connection pin 300 is fastened, only the threaded portion 330 is screwed to the first PC nut 100, The connection pin 300 is hooked on the first PC nut 100 so that the connection pin 300 can be screwed to the first PC nut 100 only by a predetermined depth.

The concrete pile 10 to which the connection pin 300 is coupled is seated on the head of the concrete pile 10 previously inserted into the excavation hole and the connection pin 300 is fixed to the second PC nut (200).

The connecting pin 300 is configured such that the end of the pin body 310 is rounded so that the connecting pin 300 is easily inserted into the second PC nut 200. The upper surface 322 of the latching groove 320 is also upwardly inclined, Even if it abuts on the upper surface of the main body 200, it is slid and inserted easily.

When the tip of the concrete pile 10 located on the upper part of the concrete pile 10 is seated on the head of the lower concrete pile 10 as described above, the coupling hole 400 is installed through the side nut part 220 of the second PC nut 200 So that it can be hooked on the latching groove 320 of the connection pin 300 inserted into the second PC nut 200.

In the process of installing the coupling hole 400, the coupling pin 410 is first inserted into the side nut portion 220.

The engaging pin 410 is inserted into the side nut portion 220 so that the guide protrusion 414 formed on the engaging pin 410 is inserted into the guide groove 221 of the side nut portion 220, 410 are inserted without being rotated inside the side nut portion 220 while being guided to the correct coupling position.

When the engaging pin 410 is inserted into the side nut part 220, the pressing bolt 420 is fastened to the inside of the side nut part 220 and the engaging pin 410 is fastened to the connecting pin 410 through the fastening bolt 420. [ (300).

The engaging protrusion 411 of the engaging pin 410 is caught by the engaging groove 320 of the connecting pin 300 so that the jointing of the pile can be prevented. .

The engaging pin 410 is pressed in the direction of the connecting pin 300 by the pressing bolt 420 and the recess 413 formed at the end of the engaging projection 411 is inserted into the cylindrical portion The lower surface 412 of the engaging projection 411 and the lower surface 321 of the engaging groove 320 are wedge-shaped with respect to each other So that the connection pin 300 is pulled downward, so that the upper concrete pile 10 is more closely attached to the lower pile 10, and the pile is joined.

Meanwhile, in the process of fixing the pile to the excavation hole by the excavation method, the excavation hole is formed through the casing, and the pile is inserted into the casing. At this time, the provisional bolt 240 is fastened through the fastening bolt coupling part 230 of the second PC nut 200 and the temporary bolt 240 is fastened to the upper end of the casing, .

When the concrete pile 10 is temporarily fixed to the concrete pile 10 and then the concrete pile 10 is temporarily fixed, the concrete pile 10 is lifted using the construction equipment, Remove the bolts (240) and pile the piles into the ground.

As described above, the second PC nut 200 is additionally provided with the mounting bolt coupling part 230, and the concrete pile 10 can be temporarily fixed through the provisional installation bolt 240, It is possible to simply mount it without the need of having a mounting device.

In addition, it is not necessary to carry out the process of pre-joining the pile through the provisional hole created in advance in the pre-boring process for the pile construction, and it is possible to construct the pile on the actual drilled hole to reduce the construction cost. And can reduce the construction period.

According to the present invention configured as described above, the joints of the upper and lower piles can be easily performed only by simple construction through the connection of the connection pin 300 and the coupling hole 400, so that even an unskilled worker can easily and quickly construct the joint.

Further, the coupling pin of the coupling hole 400 is engaged with the coupling pin 300 in a wedge-shaped manner, thereby pulling the upper pile in the direction of the lower pile so that the upper and lower piles are tighter and higher in strength. So that stable pile jointing becomes possible.

It will be understood by those skilled 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 in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

(10): Concrete pile (11): Steel wire
(20): steel pipe pile (21): reinforcing ring
(22): Nut hole (100): First PC nut
(110): Steel wire jaw (200): Second PC nut
(210): nut body portion (211): steel wire jaw
(220): side nut portion (221): guide groove
(230): a mounting bolt connecting portion (240): a temporary mounting bolt
(300): connecting pin (310): pin body
(320): an engagement groove (321): a lower surface
(322): upper surface (330): threaded portion
(400): Coupling port (410): Coupling pin
(411): a locking projection (412): a lower surface
(413): concave portion (414): guide projection
(420): pressure bolt
(430): washer (500): pressure plate
(501): shear projection (502): through hole
(510): a conduction preventing plate (600): a tip reinforcing cap
(610): ring member (620): reinforcement band
(700): head reinforcing cap (710): ring member
(720): reinforcement band (730): sleeve

Claims

A connecting pin having one end connected to a tip end of a pile disposed at an upper portion thereof and the other end having an engaging groove formed in a concave shape around an outer circumferential surface thereof;
A nut body portion which is installed to be embedded along the circumferential direction of the concrete pile at the head portion of the concrete pile located at the lower portion and is formed with a steel wire catching jaw inside one end for fixing the steel wire, And a side nut portion protruding from the side surface of the nut body portion and protruding from the outside of the concrete pile so as to communicate with the inside of the nut body portion;
And a coupling peg that is inserted through the side nut portion of the second PC nut at the outer side of the concrete pile located at the lower portion and hooked to the coupling groove of the connection pin to connect the piles positioned above and below. Of welded joints.

The method according to claim 1,
The coupling member may include:
A coupling pin inserted through the side nut portion and having a locking protrusion formed at an end thereof so as to be engaged with a locking groove of the coupling pin;
And a pressing bolt screwed to the side nut portion to urge the engaging pin toward the connecting pin so that the engaging pin is engaged with the connecting pin.

3. The method of claim 2,
A guide groove is formed in the inner circumferential surface of the side nut portion along the longitudinal direction of the side nut portion and a guide protrusion is formed on the outer circumferential surface of the engaging pin so as to be inserted into the guide groove so that the engaging pin is not rotated inside the side nut portion, So that the piles can be inserted.

3. The method of claim 2,
The lower surface of the engaging groove formed in the connecting pin is formed to be inclined downward from the inside to the outside of the connecting pin,
The lower surface of the latching protrusion is formed so as to be inclined upward from the inside to the outside of the latching protrusion so as to correspond to the lower surface of the latching recess,
And the lower surface of the engaging projection of the engaging pin is engaged with the lower surface of the engaging groove of the connecting pin in a wedge-shaped manner.

The method according to claim 1,
The connecting pin
A pin body inserted into the second PC nut and having the latching groove formed along an outer circumferential surface thereof;
And a threaded portion integrally formed on an upper end of the pin body and having a threaded portion formed on an outer circumferential surface thereof so as to be screwed onto an upper pile,
Wherein a diameter of the pin body is larger than a diameter of the threaded portion.

The method according to claim 1,
Further comprising a pressure plate attached to the outside of one end of the second PC nut to distribute a load applied to the second PC nut.

The method according to claim 6,
Further comprising a plurality of shear projections formed to protrude from the support plate to improve adhesion to the concrete.

The method according to claim 6,
Further comprising a plurality of through holes formed in the pressure plate to improve filling efficiency of the concrete poured in the concrete pile fabrication.

The method according to claim 6,
And the second PC nut is attached to the outside of the other side end of the second PC nut so as to correspond to the pivot plate so that the second PC nut is horizontally aligned with the first pressure plate during the automatic feeding of the second PC nut by the conveyor during the manufacture of the pile, Further comprising: a pile non-welded joint.

The method according to claim 1,
And a mounting bolt coupling part protruding from the side surface of the nut body of the second PC nut for temporarily fixing the concrete pile when the pile is coupled by the pre-drilling method. Welded joint of pile.

The method according to claim 1,
A head reinforcing cap installed to surround the head and the head of the concrete pile to reinforce the head and the head of the concrete pile,
The head reinforcement cap comprises a ring member attached to a head portion of a concrete pile, a reinforcement band formed at a predetermined height along an edge of the ring member to enclose an outer circumferential surface of the concrete pile, And a sleeve for securing the side nut part of the second PC nut to be fixed.

12. The method according to any one of claims 1 to 11,
Wherein the pile located at the upper portion is a concrete pile and the connection pin is fixed to a plurality of first PC nuts which are installed at predetermined intervals along the circumferential direction of the pile at the tip of the concrete pile to fix the steel wire. Weldless joint.

13. The method of claim 12,
A first pressure plate attached to the outside of one end of the first PC nut to distribute a load applied to the first PC nut,
And a conductive plate attached to the outside of the other end of the first PC nut so as to correspond to the pressure plate to prevent the first PC nut from being conducted by the pressure plate,
Wherein a plurality of shear projections are formed on the support plate so as to improve adhesion with the concrete and a plurality of through holes are formed to improve the filling efficiency of the concrete placed in the concrete pile fabrication. Joints.

12. The method according to any one of claims 1 to 11,
Wherein the pile located at the upper portion is a steel pipe pile and the connection pin is attached to a front end of a steel pipe pile and is fastened to a reinforcing ring having a plurality of nut holes for fastening a connecting pin. Device.