WO2021045261A1

WO2021045261A1 - Pile connecting device and pile connecting method using same

Info

Publication number: WO2021045261A1
Application number: PCT/KR2019/011443
Authority: WO
Inventors: 백기원; 백예지
Original assignee: 백기원; 백예지
Priority date: 2019-09-03
Filing date: 2019-09-05
Publication date: 2021-03-11
Also published as: KR102279242B1; KR20210027844A

Abstract

The present invention relates to a pile connecting device comprising: a lower connection plate which is fastened and fixed to a head part of a lower pile by means of a lower bolt and in which lower protrusions protrude radially from the top surface thereof; an upper connection plate which is fastened and fixed to the tip of an upper pile by means of an upper bolt and in which upper protrusions protrude radially from the bottom surface thereof so as to fit in between the lower protrusions of the lower connection plate; press pads mounted to head portions of the lower bolt and the upper bolt; pinholes formed through one surface or both surfaces of each of the lower protrusions of the lower connection plate and the upper protrusions of the upper connection plate; and horizontal pins coupled to the pinholes, wherein the press pads are pressed by the weight of the upper pile and thereby pressed and fixed to the head portions of the bolts, respectively, and thus prevent the bolts from loosening due to vibration from pile driving. According to the present invention, the centers of the lower and upper piles can be easily aligned by forming the side surface of each of the protrusions of the connection plates to be inclined. Thus, working hours can be shortened and work efficiency improved. Also, since the press pads mounted to the head portions of the bolts that fix the connection plates to the piles are pressed by the weight of the upper pile and thereby pressed and fixed, the bolts can be prevented from loosening due to the driving vibration when driving a connection pile in which the lower pile and the upper pile are connected by the pile connecting device of the present invention. Thus, the present invention has the effect of being able to construct strong pile connections.

Description

Pile connection device and pile connection method using the same

The present invention relates to a pile, and more particularly, when a compression pad installed on the head of a bolt fixing a joint plate to the pile is pressed by pressure by the weight of the upper pile to drive the connection pile to which the lower pile and the upper pile are connected. , It relates to a pile connection device capable of preventing the bolt from loosening due to driving vibration, and a pile connection method using the same.

Recently, with the rapid expansion of urban areas, many structures including infrastructures such as roads and bridges and various architectural structures are being built on the soft ground. In such a ground, since the depth from the ground surface to the support layer having high ground strength is generally very deep, the length of the pile must be long in order to transmit the load of the structure to the support layer.

However, since the maximum length of piles currently being produced is only 15m, piles having the same diameter must be connected to each other in case the depth of the supporting layer is deep, such as soft ground.

As a device for connecting the piles, a pile connection device and method have been registered as patent application No. 0034200 in 2015 and No. 10-1803358.

The previously registered patent is a lower joint plate that is bolted to the head of the lower pile by forming a radially inclined lower protrusion and lower groove on the upper surface, and the lower surface to engage the lower protrusion and lower groove of the lower joint plate. The inclined upper protrusion and the upper groove are radially formed to the upper joint plate that is bolted to the tip of the upper pile, the lower protrusion of the lower joint plate and the fastening hole formed on one or both sides of the upper protrusion of the upper joint plate, and the fastening hole. It is a configuration including a pinhole provided in a successively inclined shape, and a fastening fixing member fastened and fixed to the pinhole.

That is, after the bolts are connected through the through holes of each of the joint plates, the side surfaces of each protrusion are joined so that the side surfaces of each protrusion are in contact with the PC nut fixed to the end of the pile, and the upper and lower joint plates are combined, and The fastening fixing member is fastened to the fastening hole through a pinhole.

However, when driving intrusion of the connecting pile connected by the lower pile and the upper pile into the ground, the bolt connecting the joint plate and the pile was loosened by the driving vibration, and the coupling force between the joint plate and the pile was lowered.

In addition, there was a problem in that the fastening fixing member fastened to the pinhole is released and the fastening force is lowered, and the fastening fixing member having the low fastening force is separated from the pinhole, so that the connection force between the lower pile and the upper pile may be released.

Accordingly, it has been made in consideration of all the problems of the prior art as described above, and an object of the present invention is a pile connecting device capable of easily matching the centers of the lower and upper piles by forming the protruding sides of each joint plate in an inclined manner, and using the same. It is to provide a method of connecting piles.

In addition, another object of the present invention is that the crimping pad installed on the head of the bolt fixing the joint plate to the pile is compressed by pressure by the self-weight of the upper pile, so that the bolt is released by driving vibration when driving the connection pile to which the pile is connected. It is to provide a pile connection device and a pile connection method using the same.

In addition, another object of the present invention is to increase the connection force between the lower pile and the upper pile by preventing the horizontal pin from being separated or loosened by the driving vibration due to the horizontal pin being elastically coupled to the pinhole or fixed to the pinhole. It is to provide a pile connection device that can be made and a pile connection method using the same.

The present invention pile connecting device, the lower protrusion radially protrudes on the surface, the lower joint plate fastened and fixed with a lower bolt to the head of the lower pile; An upper joint plate having an upper protrusion radially protruding on a lower surface of the lower joint plate so as to be engaged between the lower protrusions of the lower joint plate, and fastened and fixed with an upper bolt to the tip of the upper pile; A compression pad installed on the head of the lower bolt and the upper bolt; A pinhole formed through the lower protrusion of the lower joint plate and one or both sides of the upper protrusion of the upper joint plate; And a horizontal pin coupled to the pinhole, wherein the pressing pad is compressed to the head of each bolt by pressing by its own weight of the upper pile when connecting the upper pile and the lower pile to prevent loosening of the bolt due to driving vibration do.

The lower joint plate, a lower plate body; A lower protrusion radially protruding from the upper surface of the lower plate body; It may include a; first lower through hole penetrated into the inner portion of the lower protrusion for fastening the lower bolt. And a second lower through-hole penetrating through the lower plate body between the lower protrusions to accommodate the head of the upper bolt protruding below the lower surface of the upper protrusion. The upper joint plate, the upper plate body; An upper protrusion radially protruding from the bottom surface of the upper plate body; It may include a; first upper through hole penetrated for fastening of the upper bolt inside the upper protrusion. It may further include a second upper through hole penetrated to accommodate the head of the lower bolt protruding above the upper surface of the lower protrusion in the upper plate body between the upper protrusions. It may further include a receiving groove formed on the same line as the PC nut on the lower surface of the lower joint plate and the upper surface of the upper joint plate to accommodate the PC nut. The compression pad installed on the head of the lower and upper bolts may be made of a compressible elastic material such as a rubber material. The compression pad may be adhesively fixed to the bolt head.

The pinhole may be formed as an inclined hole that is inclined to be narrower inside than the outside, or a horizontal hole may be extended at an end of the inclined hole. The horizontal pin includes a rod body in which a concave groove is formed, and an elastic piece that is pressably coupled to the concave groove. The rod body is formed to have the same inner diameter as the pinhole. The elastic piece includes an elastic body through which the inside is passed, and an opening cut at one side so that the elastic body can be compressed.

The method of connecting a pile of the present invention comprises: a lower joint plate fixing step of fastening and fixing a lower joint plate in which a lower protrusion radially protrudes on an upper surface with a lower bolt to the head of the lower pile; An upper joint plate fixing step of fastening and fixing the upper joint plate with the upper protrusion radially protruding on the lower surface thereof with an upper bolt to the tip of the upper pile; A lower pile insertion step of inserting the lower pile to which the lower joint plate is fixed into the service hole for connecting the piles; An upper pile mounting step of mounting an upper pile to which an upper joint plate is fixed on an upper part of the lower pile inserted into the service hole; A mounting completion step of seating the upper pile on the lower pile so that the upper protrusions of the upper joint plate are engaged between the lower protrusions of the lower joint plate, and pinholes are formed at one or both sides of the lower protrusion and the upper protrusion at the same time; A horizontal pin coupling step of inserting a horizontal pin into the pinhole and then hitting and fixing it to couple the upper and lower joint plates; Including; a joint construction completion step of completing the joint construction of the pile by combining a horizontal pin, wherein a compression pad is installed at the head of the lower bolt and the upper bolt, and the compression pad is the upper pile in the completion step of mounting the upper pile. It is compressed by the weight of the bolt to prevent the bolt from loosening due to driving vibration.

In addition, when the pile is inserted into the drilled hole as described above, and the pile is inserted into the ground by driving without forming the drilled hole, the present invention is the method of connecting the piles. The lower joint plate fixing step of fastening and fixing the lower joint plate in which the lower protrusion radially protrudes on the upper surface with a lower bolt to the head of the lower pile penetrated into the ground by driving; An upper joint plate fixing step of fastening and fixing the upper joint plate with the upper protrusion radially protruding on the lower surface thereof with an upper bolt to the tip of the upper pile; An upper pile mounting step of mounting the upper pile to which the upper joint plate is fixed on the upper part of the lower pile to which the lower joint plate is fixed; A mounting completion step of seating the upper pile on the lower pile so that the upper protrusions of the upper joint plate are engaged between the lower protrusions of the lower joint plate, and pinholes are formed at one or both sides of the lower protrusion and the upper protrusion at the same time; A horizontal pin coupling step of inserting a horizontal pin into the pinhole and then hitting and fixing it to couple the upper and lower joint plates; It may include a; joint construction completion step of completing the joint construction of the pile by combining the horizontal pin.

According to the present invention, since the protrusion side of each joint plate is formed to be inclined so that the centers of the lower and upper piles can be easily matched, there is an effect of shortening the working time and improving the working efficiency through quick work.

In addition, according to the present invention, the compression pad installed on the head of the bolt fixing the joint plate to the pile is pressed by the self-weight of the upper pile, and the bolt due to driving vibration when driving the connection pile connected to the lower pile and the upper pile. As it can prevent loosening of the pile, it has the effect of firmly constructing the pile joint.

In addition, according to the present invention, the horizontal pin is elastically coupled to the pinhole or is fixed by being caught in the pinhole to prevent separation or relaxation of the coupling force of the horizontal pin due to driving vibration, thereby increasing the connection force between the lower pile and the upper pile. In addition, it has the effect of improving the structural performance of the connecting pile.

1 is a flow chart of a pile connection method to which the present invention is applied

Figure 2 is an exploded perspective view of a pile connecting device to which the present invention is applied

3 is an exploded perspective view showing a lower joint plate and an upper joint plate of the pile connecting device to which the present invention is applied

Figure 4 is an exploded perspective view showing a horizontal pin of the pile connecting device to which the present invention is applied

5 to 6 are schematic views showing the installation state of the pile connecting device to which the present invention is applied

7 is a cross-sectional view showing a bolted portion of the pile connecting device to which the present invention is applied

8 to 9 is a horizontal pin coupling state diagram of the pile connecting device to which the present invention is applied

10 is an enlarged cross-sectional view of FIG. 9

11 is an enlarged cross-sectional view showing another embodiment of a horizontal pin of the pile connecting device to which the present invention is applied

12 is a combined state diagram showing another embodiment of the horizontal pin of the pile connecting device to which the present invention is applied

13A to 13B are graphs showing the flexural performance test photos and the flexural performance test results of the pile connecting device to which the present invention is applied

14A to 14B are graphs showing shear performance test photos and shear performance test results of the pile connecting device to which the present invention is applied

15A to 15B are graphs showing tensile performance test photos and tensile performance test results of the pile connecting device to which the present invention is applied

16A to 16B are graphs showing a photograph of a compression performance test and a result of a compression performance test of the pile connecting device to which the present invention is applied

17A to 17C are photographs of a driving test confirming whether the bolt is loosened and whether the horizontal pin is separated in the pile connecting device to which the present invention is applied.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. 1 is a flow chart of a pile connection method to which the present invention is applied, Fig. 2 is a separate perspective view of a pile connection device to which the present invention is applied, and Fig. 3 is a separation showing the lower joint plate and the upper joint plate of the pile connection device to which the present invention is applied It is a perspective view.

The present invention pile connection device 100, as a device for connecting a plurality of piles, the lower joint plate 110, the upper joint plate 120, the compression pad 130, the pinhole 140, the horizontal pin 150 Includes.

The lower joint plate 110 is fastened and fixed to the head of the lower pile 10 with a lower bolt (S), and is composed of a lower plate body 111, a lower protrusion 112, and a first lower through hole 113. .

The lower plate body 111 is a plate body that is in close contact with the head of the lower pile 10.

The lower protrusion 112 is a protrusion radially protruding from the upper surface of the lower plate body 111, and the side surface protrudes obliquely.

The first lower through hole 113 is a through hole through which the lower bolt S is moved into the lower protrusion 112.

In addition, a second lower through hole 114 is formed through the lower plate body 111 between the lower protrusions 112 so that the head of the upper bolt S′ protruding below the lower surface of the upper protrusion 122 is accommodated.

A receiving groove 115 is formed on the lower surface of the lower joint plate 110 to accommodate the PC nut on the same line as the PC nut of the lower pile 10.

The upper joint plate 120 is fastened and fixed to the front end of the upper pile 120 with an upper bolt (S'), and consists of an upper plate body 121, an upper protrusion 122, and a first upper through hole 123 do.

The upper plate body 121 is a plate body that is in close contact with the tip of the upper pile 20.

The upper protrusion 122 is a protrusion radially protruding from the lower surface of the upper plate body 121, and the side surface may protrude obliquely.

The first upper through hole 123 is a through hole through which the upper bolt S'is moved in the upper protrusion 122.

In addition, a second upper through hole 124 is formed through the upper plate body 121 between the upper protrusions 122 to accommodate the head of the lower bolt S protruding above the upper surface of the lower protrusion 112.

A receiving groove 125 is formed on the upper surface of the upper joint plate 120 to accommodate the PC nut on the same line as the PC nut of the upper pile 20.

The compression pad 130 is configured to be installed on the head of the lower bolt S and the upper bolt S', and is made of a compressible elastic material such as a compressible rubber material.

The compression pad 130 is fixed to the bolt head with an adhesive or the like.

When the pinhole 140 is engaged with the lower protrusion 112 of the lower joint plate 110 and the upper protrusion 122 of the upper joint plate 120, the work of the lower protrusion 112 and the upper protrusion 122 The configuration is formed through the side or both sides, it may be formed by 1/2 on each protrusion.

The pinhole 140 is formed as an inclined hole 141 that is inclined so that the inner side is narrower than the outer side.

The pinhole 140 has a horizontal hole 142 extending horizontally at an end of the inclined hole 141.

The horizontal pin 150 is configured to be coupled to the pin hole 140, as shown in FIG. 4, and includes a rod body 151, a concave groove 152, and an elastic piece 153.

The rod body 151 is coupled to the pinhole 140 and has an inclined outer surface.

The concave groove 152 is formed in a concave end portion of the rod body 151, that is, an end portion first coupled to the pinhole 140.

The elastic piece 153 is coupled to the concave groove 152 and is in close contact with the inner surface of the pinhole 140, and includes an elastic body 154 and an opening 155. The elastic body 154 has a shape of a hollow portion through which the inside is penetrated.

The opening 155 is a portion opened on one side of the elastic body 154 and may be coupled to the concave groove 152 by this portion having elasticity.

When the horizontal pin 150 is inserted into the pinhole 140, the elastic piece 153 elastically adheres to the inner surface of the pinhole 140 as the diameter of the pinhole 140 decreases toward the inside, thereby causing a horizontal pin by driving vibration. 150 serves to prevent the pinhole 140 from separating or loosening the coupling force.

The following describes the manufacturing and construction process of the present invention configured as described above when the pile is constructed by the buried method.

First, the lower joint plate 110 having the lower protrusion 112 and the first lower through hole 113 formed on the lower plate body 111 is in close contact with the upper surface of the lower pile 10, that is, to the head.

The receiving groove 115 formed on the lower surface of the lower joint plate 110 must be located on the same line as the PC nut of the lower pile 10, and at this time, the end of the PC nut protrudes from the upper surface of the lower pile 10. In the case, the end of the PC nut is accommodated in the receiving groove 115.

Here, when the receiving groove 115 is not formed in the lower joint plate 110, the lower joint plate 110 is bolted to the lower pile 10 while the PC nut protrudes from the upper surface of the lower pile 10. When doing so, as the PC nut is compressed in the direction of the main body of the lower pile 10 by the lower joint plate 110, a longitudinal crack occurs in the lower pile 10, and the receiving groove 115 prevents this phenomenon. It is to do.

When the lower joint plate 110 is in close contact with the lower pile 10, the lower bolt S is coupled to the first lower through hole 113 of the lower joint plate 110, and the PC nut of the lower pile 10 By fastening to the lower joint plate 110 is fixed to the head of the lower pile (10).

In addition, the upper joint plate 120 having the upper protrusion 122 and the first upper through hole 123 formed on the upper plate body 121 is in close contact with the lower surface of the upper pile 20, that is, the tip.

The receiving groove 125 formed on the upper surface of the upper joint plate 120 must be located on the same line as the PC nut of the upper pile 20, and at this time, the end of the PC nut protrudes from the lower surface of the upper pile 20. In the case, the end of the PC nut is accommodated in the receiving groove (125).

Here, when the receiving groove 125 is not formed in the upper joint plate 120, the upper joint plate 120 is bolted to the upper pile 20 while the PC nut protrudes from the bottom of the upper pile 20 When doing so, as the PC nut is compressed in the direction of the main body of the upper pile 20 by the upper joint plate 120, a longitudinal crack occurs in the upper pile 20, and the receiving groove 125 prevents this phenomenon. It is to do.

When the upper joint plate 120 is in close contact with the upper pile 20, the upper bolt (S') is coupled to the first upper through hole 123 of the upper joint plate 120, and the PC of the upper pile 20 The upper joint plate 120 is fixed to the upper pile 20 by fastening it to the nut.

Here, the head of the lower and upper bolts S (S') to which the compression pad 130 is attached protrudes from the upper and lower surfaces of the lower and

upper protrusions

112 and 122. The compression pad 130 installed on the head of the lower and upper bolts (S) (S') is the lower and upper bolts (S) due to the pressure on the lower and upper surfaces of the upper and lower piles by the weight of the upper piles 20. By generating compressive stress and frictional stress on the head of (S'), it is possible to prevent loosening of bolts (S)(S') during pile driving.

That is, the compression pad 130 installed on the upper bolt S'protrudes through the second lower through hole 114 formed through the lower plate body 111 between the lower protrusions 112, and The installed compression pad 130 protrudes through the second upper through hole 124 formed through the upper plate body 121 between the upper protrusions 122, and when the upper pile 20 is mounted on the lower pile (10), the upper pile ( The compression pad 130 attached to the head of the lower and upper bolts (S) (S') is compressed by the lower and upper surfaces of the upper and lower piles by pressing by the self-weight of 20), so that the bolts (S)(S' ) To prevent loosening.

The compression pad 130 is formed of an elastic material that can be compressed by the weight of the upper pile, and the compression pad 130 of the elastic material is preferably a rubber material having a certain strength.

When the lower joint plate 110 and the upper joint plate 120 are fixed to the upper surface of the lower pile 10 and the lower surface of the upper pile 20 by the above process, the lower pile 10 is lifted with a lifting device to lift the pile. It is inserted into the service hole drilled in the ground for connection.

The upper end of the lower pile 10 inserted into the service hole must be located above the service hole, and the upper pile 20 is lifted by a lifting device and mounted on the upper part of the lower pile 10.

When the upper pile 20 is mounted on the lower pile 10, as shown in FIGS. 5 to 7, the upper protrusion 122 of the upper joint plate 120 fixed to the upper pile 20 is ) Is engaged and coupled between the lower protrusions 112 of the lower joint plate 110 fixed to each other.

Since the upper protrusion 122 and the lower protrusion 112 have an inclined side and can be easily combined, the working time can be shortened by improving work efficiency.

When the upper protrusion 122 is engaged and coupled to each other, the compression pad 130 installed on the head of the lower bolt (S) and the upper bolt (S') is understood by the weight of the upper pile (20) Is compressed by the lower end of the upper pile 20 and the upper end of the lower pile 10, and at the same time, the compression pad 130 is compressed to the head of the bolt (S) (S') to reduce the compression stress and frictional stress. cause. Therefore, during driving of the connecting pile, the bolt (S) (S') is released by catching the compressive stress and frictional stress acting on the compression pad 130 by the force that the bolt (S) (S') is about to be released by the driving vibration. Prevent.

That is, in order for the bolt (S) (S') to be released by driving vibration, the bolt must move in the direction of the head while rotating in the opposite direction, but the rotation of the bolt is suppressed by the frictional stress generated by the compression pad 130. Movement in the head direction is suppressed by the compression stress generated by the compression pad 130 to suppress the loosening of the bolt, and if the bolt is released and moves in the head direction, the compression pad 130 is further compressed to the bolt. Since the applied compressive stress and frictional stress become larger, loosening of the bolt becomes more difficult.

In addition, when the upper protrusion 122 of the upper joint plate 120 is engaged and coupled with the lower protrusion 112 of the lower joint plate 110, the side surfaces of the

protrusions

122 and 112 are in close contact with each other and Pinholes 140 are formed on one side or both sides by 1/2 facing each other.

The pinhole 140 may be formed as an inclined hole 141 that is inclined to be narrower inside than the outside, and a horizontal hole 142 may be extended to an end of the inclined hole 141 to be formed.

Since the side surfaces of each of the

protrusions

122 and 112 are in close contact, the load distribution effect by each joint plate is excellent, so that the lower pile 10 and the upper pile 20 are connected by the pile connection device 100. Safety can be improved, and the

protrusions

122 and 112 are formed in an inclined manner so that the central axis of the lower joint plate 110 and the upper joint plate 120 can be easily matched, so that the working time can be shortened by improving work efficiency. I can.

In addition, as shown in FIGS. 8 to 10, by coupling the horizontal pin 150 to the pin hole 140, the joint construction of the pile may be completed. Since the horizontal pin 150 has an outer diameter of the elastic piece 153 coupled to the concave groove 152 of the rod body 151 is smaller than the outer inner diameter of the inclined hole 141 of the pinhole 140, the inside of the inclined hole 141 It can be moved smoothly.

When the horizontal pin 150 is moved a certain distance into the inclined hole 141, the elastic body 154 of the elastic piece 153 is in close contact with the inner surface of the inclined hole 141, and in this state, the horizontal pin 150 When hitting the rod body 151 of, the horizontal pin 150 is the elastic body 154 of the elastic piece 153 along the inner diameter of the inclined hole 141 into the concave groove 152 around the opening 155 As it retracts, it moves into the inclined hole 141.

At this time, the elastic piece 153 is retracted along the inner diameter of the inclined hole 141 and passed through the inclined hole 141, and then moved to the horizontal hole 142, and then moved to the horizontal hole 142. The outer surface of the piece 153 is elastically adhered to the inner surface of the horizontal hole 142 and at the same time, the outer surface of the rod body 151 is in close contact with the inner surface of the inclined hole 141, and the lower part is coupled to the lower pile 10 and the upper pile 20. The joint plate 110 and the upper joint plate 120 may be firmly connected.

That is, the outer surface of the elastic piece 153 is in elastic contact with the inner surface of the horizontal hole 142, and the outer surface of the rod body 151 is in close contact with the inner surface of the inclined hole 141, so that the horizontal pin 150 and the lower/upper joint plate By maximizing the adhesion of the 110 and 120, the lower and upper

joint plates

110 and 120 are firmly connected, as well as the separation of the horizontal pin 150 due to driving vibration can be prevented.

11 is a horizontal hole having the same inner diameter over the entire length of a plurality of elastic pieces (153', 153") instead of coupling the horizontal pin 150 composed of the rod body 151 and the elastic piece 154 to the pinhole 140 It is shown to connect the lower joint plate 110 and the upper joint plate 120 by hitting the pinhole 140 composed of only 142, and the horizontal pin 150 coupled by hitting the pinhole 140 is a horizontal hole ( The first elastic piece 153' having the same shape as the horizontal hole 142 and having an opening 155' while having the same shape as the horizontal hole 142, and a first elasticity inserted into the horizontal hole 142 It is composed of a second elastic piece 153" having the same shape as the piece 153' and having an outer diameter slightly larger than the inner diameter of the first elastic piece 153'. First, the first elastic piece ( 153') and pushed into the pinhole 140. Next, in the same way, the second elastic piece 153" is pressed to the inner diameter of the first elastic piece 153' and pressed so that the entire outer diameter of the second elastic piece 153" becomes the first elastic piece 153'. ) To the inner surface of the inner diameter. The first and second elastic pieces 153 ′ and 153 ″ coupled to each other while being compressed into the pinhole 140 have the same function as the horizontal pin 150 described above. The first and second elastic pieces 153 ′ coupled in this way The openings 155 ′ and 155 ″ of, 153 ″ are directed upward and downward, respectively, so that the strength of the first elastic piece 153 ′ and the second elastic piece 153 ″ is maximized. In addition, although not specifically shown in the drawings, if additional strength reinforcement is required, a plurality of elastic pieces having the same shape as the first and second elastic pieces 153 ′ and 153 ″ are used as the first and second elastic pieces in the same manner as described above. It may be further installed on the elastic pieces (153', 153").

In addition, as shown in FIG. 12, the horizontal pin 150 ′ allows the elastic piece 153 to pass through the horizontal hole 142 to expand and restore itself to elasticity, so that the end of the elastic piece 153 is each protrusion 112, 122 ) By being in close contact with the inner surface to prevent separation of the horizontal pin 150 from the pinhole 140 by driving vibration, and the lower joint plate 110 coupled to the lower pile 10 and the upper pile 20 It is possible to increase the connection force of the upper joint plate 120.

The connection pile to which the lower pile 10 and the upper pile 20 are connected can be driven and penetrated into the ground, and when the connection pile is driven, the compression pad 130 is provided with the lower bolt (S) and the upper bolt (S'). ) Is compressed to the head of each bolt (S) (S') to prevent loosening, and at the same time, the lower joint plate 110 and the upper joint plate 120 coupled to the lower pile 10 and the upper pile 20 It is possible to increase the connection strength of the pile while easily constructing the pile connection by elastically combining the horizontal pin 150.

In Table 1, the flexural performance of the pile connecting device 100 connecting the lower pile 10 and the upper pile 20 was measured, and FIG. 13A is a photograph of the flexural performance test, and FIG. 13B is a graph showing the measured test results. to be.

Test method: KS F 4306

Specimen Specification: 500mm diameter, 5m length PHC pile (Class A) 2 connected with a connecting device

Flexural strength test result

구분 division	균열하중Crack load	균열휨강도Crack flexural strength	파괴하중Breaking load	파괴휨강도Fracture flexural strength	비고Remark
KS F 4306 기준KS F 4306 standard	59.6 kN59.6 kN	103.0 kN·m103.0 kN m	92.9 kN92.9 kN	155.0 kN·m155.0 kN m	PHC말뚝 A종 기준값PHC pile Class A reference value
시험결과Test result	99.0 kN99.0 kN	130.5 kN·m130.5 kN m	133.8 kN133.8 kN	174.0 kN·m174.0 kN m	기준값 만족Satisfy the reference value

In addition, in Table 2, the shear performance of the pile connecting device 100 was measured, and FIG. 14A is a photograph of the shear performance test, and FIG. 14B is a graph showing the measured test results.

Test method: KS F 4306

Shear strength test result

구분division	최대하중Load	전단강도Shear strength	비고Remark
KS F 4306 기준KS F 4306 standard	457.2 kN457.2 kN	228.6 kN228.6 kN	PHC말뚝 A종 기준값PHC pile Class A reference value
시험결과Test result	762.5 kN762.5 kN	381.2 kN381.2 kN	기준값 만족Satisfy the reference value

In addition, in Table 3, the tensile performance of the pile connecting device 100 was measured, and FIG. 15A is a photograph of a tensile performance test, and FIG. 15B is a graph showing the measured test results.

Test method: Tensile test for pile joints using a tensile jig

Specimen specification: 500mm diameter pile connecting device

Tensile test result

구분division	인장강도The tensile strength	비고Remark
KS F 4306 기준KS F 4306 standard	749.5 kN749.5 kN	PHC말뚝 A종 기준값PHC pile Class A reference value
시험결과Test result	941.7 kN941.7 kN	기준값 만족Satisfy the reference value

In addition, in Table 4, the compression performance of the pile connecting device 100 was measured, and FIG. 16A is a photograph of a compression performance test, and FIG. 16B is a graph showing the measured test results.

Test method: Compression test for pile connection device

Specimen specification: 500mm diameter, 1.0m PHC pile connection device connected to (Class A)

Compression test result

구분division	압축강도Compressive strength	비고Remark
KS F 4306 기준KS F 4306 standard	2,970 kN2,970 kN	UPHC말뚝 A종 기준값UPHC pile class A standard value
시험결과Test result	5,035 kN 이상5,035 kN or more	기준값 만족Satisfy the reference value

As can be seen from the above test results, it can be seen that the pile connecting device 100 of the present invention has excellent performance that satisfies all of the reference values according to the KS F 4306 test.

In addition, whether each bolt (S) (S') is released by driving vibration and whether the horizontal pin 150 fixed to the pinhole 140 is separated when driving the pile connected by the pile connection device 100 of the present invention. Investigated. To this end, bolts (S) (S') fastened to the joint plate and the joint plate after coupling the lower and upper

joint plates

110 and 120 to the lower and

upper piles

10 and 20, respectively, as shown in FIG. 17A A continuous straight line was marked on and the upper pile 20 was mounted on the lower pile 10, and the horizontal pin 150 was coupled to the pinhole 140 to complete the construction of the joint. As a result of checking the degree of misalignment of the continuous straight line drawn on the head of the joint plate and the bolt (S) (S') after applying driving more than 100 times using a hammer to the piles connected in this way, the joint as shown in FIGS. 17B to 17C It was confirmed that the bolt (S) (S') was not loosened by the driving vibration at all by maintaining the continuous straight line drawn on the head of the plate and bolt (S) (S') as it was before driving.

In addition, as a result of carrying out a dynamic load test while driving the piles connected by the pile connection device 100 of the present invention, the connection state of the pile connection device 100 is very sturdy enough to be similar to the main body of the upper and

lower piles

20 and 10. It was confirmed that the horizontal pin 150 was not separated from the pinhole 140 due to the driving vibration.

As described above, although the present invention has been described by limited embodiments and drawings, terms or words used in the present specification and claims are limited to a conventional or dictionary meaning and should not be interpreted. It must be interpreted as a corresponding meaning and concept. Accordingly, the embodiments described in the present specification and the configurations shown in the drawings are only one embodiment of the present invention, and do not represent all of the technical spirit of the present invention, and thus various It should be understood that there may be equivalents and variations.

Claims

A lower joint plate having a lower protrusion radially protruding from the upper surface and fastened and fixed to the head of the lower pile with lower bolts;

An upper joint plate having an upper protrusion radially protruding on a lower surface of the lower joint plate so as to be engaged between the lower protrusions of the lower joint plate, and fastened and fixed with an upper bolt to the tip of the upper pile;

A compression pad installed on the head of the lower bolt and the upper bolt;

A pinhole formed through the lower protrusion of the lower joint plate and one or both sides of the upper protrusion of the upper joint plate; And

Includes; a horizontal pin coupled by hitting the pinhole,

The crimping pad is compressed to the head of each bolt by pressing by its own weight of the upper pile to prevent loosening of the bolt due to driving vibration.
The method according to claim 1,

The lower joint plate, a lower plate body; A lower protrusion radially protruding from the upper surface of the lower plate body; A first lower through hole penetrated into the lower protrusion;

The upper joint plate, the upper plate body; An upper protrusion radially protruding from the bottom surface of the upper plate body; A pile connecting device comprising: a first upper through hole penetrating into the upper protrusion.
The method according to claim 2,

A second lower through-hole penetrating through the lower plate body between the lower protrusions to accommodate the head of the upper bolt protruding below the lower surface of the upper protrusion;

And a second upper through hole penetrated to accommodate the head of the lower bolt protruding above the upper surface of the lower protrusion in the upper plate body between the upper protrusions.
The method according to claim 2,

And a receiving groove formed on the lower surface of the lower joint plate and the upper surface of the upper joint plate on the same line as the PC nut to accommodate the PC nut.
The method according to claim 1,

The crimping pad is a pile connecting device, characterized in that formed of an elastic material.
The method according to claim 1,

The horizontal pin, a rod body in which a concave groove is formed; And an elastic piece that is pressably coupled to the concave groove.
The method according to claim 1,

The pinhole is a pile connecting device, characterized in that the inclined hole is formed as an inclined hole narrower inside than the outer side or a horizontal hole is formed extending at the end of the inclined hole.
The method of claim 6,

When the horizontal pin moves a certain distance into the inclined hole, the elastic body of the elastic piece is in close contact with the inner surface of the inclined hole, and when hitting the bar body of the horizontal pin in this state, the elastic piece follows the inner diameter of the inclined hole and the elastic body centers around the opening. A pile connecting device, characterized in that the outer surface of the elastic piece is elastically adhered to the inner surface of the horizontal hole by moving to the horizontal hole after passing through the inclined hole while falling into the concave groove, and at the same time, the outer surface of the rod body is in close contact with the inner surface of the inclined hole.
The method of claim 6,

The horizontal pin is a pile connection, characterized in that the elastic piece passes through the inclined hole and the horizontal hole, expands and restores to its own elasticity, expands its diameter, and the ends of the elastic piece are in close contact with the inner surfaces of the upper and lower protrusions of the upper and lower joint plates. Device.
The method of claim 6,

The elastic piece, the elastic body of the hollow portion through which the inside; And an opening cut at one side so that the elastic body can be expanded or constricted.
The method according to claim 1,

The horizontal pin coupled by hitting the pinhole has the same improvement as the horizontal hole, has an outer diameter slightly larger than the size of the horizontal hole, and has the same shape as the first elastic piece having an opening and the first elastic piece inserted into the horizontal hole. A pile connecting device comprising a second elastic piece having an opening while having an outer diameter slightly larger than the inner diameter of the first elastic piece.
A lower joint plate fixing step of fastening and fixing the lower joint plate with the lower protrusion radially protruding on the upper surface with a lower bolt to the head of the lower pile;

An upper joint plate fixing step of fastening and fixing the upper joint plate with the upper protrusion radially protruding on the lower surface thereof with an upper bolt to the tip of the upper pile;

A lower pile insertion step of inserting the lower pile to which the lower joint plate is fixed into the service hole for connecting the piles;

An upper pile mounting step of mounting an upper pile to which an upper joint plate is fixed on an upper part of the lower pile inserted into the service hole;

The upper pile is mounted on the lower pile so that the upper protrusion of the upper joint plate engages between the lower protrusions of the lower joint plate, and at the same time, pinholes are formed on one or both sides of the lower protrusion and the upper protrusion. step;

A horizontal pin coupling step of inserting a horizontal pin into the pinhole and then hitting and fixing it to couple the upper and lower joint plates;

Including; a joint construction completion step of completing the joint construction of the pile by combining the horizontal pin,

A compression pad is installed on the head of the lower bolt and the upper bolt,

The crimping pad is compressed on the head of the bolt by pressing by its own weight of the upper pile to prevent the bolt from being released due to driving vibration.