KR102279242B1 - Pile connection apparatus and Pile connection method for using it - Google Patents

Abstract

The present invention is a lower joint plate having a lower protrusion radially protruding from the upper surface, and fixed to the head of the lower pile with a lower bolt; an upper joint plate having an upper protrusion radially protruding from a lower surface to engage between the lower protrusions of the lower joint plate, and fastening and fixing 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 one or both sides of the lower protrusion of the lower joint plate and the upper protrusion of the upper joint plate; and a horizontal pin coupled to the pinhole, wherein the compression pad is pressed and fixed to the head of each bolt under pressure by the weight of the upper pile to prevent loosening of the bolt by driving vibration. will be.
According to the present invention, by forming the protrusion side of each joint plate to be inclined, it is possible to easily match the center of the lower and upper piles, so it is possible to shorten the working time and improve the working efficiency, and the head of the bolt for fixing the joint plate to the pile Since the compression pad installed in the part is fixed by pressing by the pressure of the upper pile by its own weight, it is possible to prevent the bolt from loosening due to driving vibration when driving the connecting pile connected to the lower pile and the upper pile with the pile connecting device of the present invention. It has the effect of being able to firmly construct

Description

Pile connection apparatus and pile connection method using the same {Pile connection apparatus and Pile connection method for using it}

The present invention relates to piles, and more particularly, when the compression pad installed on the head of the bolt for fixing the joint plate to the pile is compressed by pressing by the weight of the upper pile, the lower pile and the upper pile are connected when driving the connecting pile , It relates to a pile connection device capable of preventing bolts from being loosened by driving vibration, and a pile connection method using the same.

In recent years, with the rapid expansion of downtown areas, many structures including infrastructure such as roads and bridges and various architectural structures are being built on 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, when the depth of the support layer is deep, such as in soft ground, piles having the same diameter should be connected to each other.

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

The previously registered patent has a lower joint plate with an inclined lower protrusion and a lower groove formed radially on the upper surface to be bolted to the head of the lower pile, and the side surface on the lower surface to engage with the lower protrusion and lower groove of the lower joint plate. An upper joint plate having an inclined upper protrusion and an upper groove formed radially to be bolted to the tip of the upper pile, a lower protrusion of the lower joint plate and a 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 member fastened to the pinhole.

That is, after coupling the bolt through the through hole of each joint plate, the side of each protrusion is surface-contacted in the state of being fastened and fixed to the PC nut fixed to the end of the pile, and the upper and lower joint plates are combined, and the side of the protrusion Fastening and fixing the fastening member to the fastening hole through the pinhole.

However, when the lower pile and the upper pile connected by a connecting device were driven into the ground, the bolt connecting the joint plate and the pile was loosened by the driving vibration, and there was a problem that the bonding strength between the joint plate and the pile was lowered.

In addition, the fastening member fastened to the pinhole is loosened and the fastening force is lowered, and the fastening and fastening member having the lowered fastening force is separated from the pinhole and the connecting force of the lower pile and the upper pile can be released.

Accordingly, it was made in view of the various problems of the prior art as described above, and an object of the present invention is to form a protruding side of each joint plate inclined to easily match the center of the lower and upper piles, and a pile connecting device using the same To provide a pile connection method.

In addition, another object of the present invention is that the compression pad installed on the head of the bolt for fixing the joint plate to the pile is compressed by the pressure by the weight of the upper pile, and the bolt is loosened by driving vibration when driving the connecting pile to which the pile is connected. To provide a pile connection device capable of preventing the occurrence and a pile connection method using the same.

In addition, another object of the present invention, the horizontal pin is elastically coupled to the pinhole or fixed to the pinhole to prevent separation of the horizontal pin by driving vibration or the coupling force is relaxed, thereby increasing the connection force between the lower pile and the upper pile To provide a pile connection device and a pile connection method using the same.

The present invention pile connection device, the lower protrusion on the surface is projected radially, the lower joint plate is fastened to the head of the lower pile with a lower bolt; an upper joint plate having an upper protrusion radially protruding from a lower surface to engage between the lower protrusions of the lower joint plate, and fastening and fixing 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 one or both sides of the lower protrusion of the lower joint plate and the upper protrusion of the upper joint plate; and a horizontal pin coupled to the pinhole, wherein the compression pad is pressed to the head of each bolt by pressure by the 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, the lower plate body; a lower projection radially protruding from the upper surface of the lower plate body; It may include; a first lower through-hole penetrated for fastening the lower bolt inside the lower protrusion. It further includes; a second lower through-hole penetrated to accommodate the head of the upper bolt protruding below the lower surface of the upper projection in the lower plate body between the lower projections. The upper joint plate, the upper plate body; an upper projection radially protruding from the lower 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 through the upper plate body between the upper protrusions to accommodate the head of the lower bolt protruding above the upper surface of the lower protrusion. It may further include; receiving grooves respectively 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 rubber material. The compression pad may be adhesively fixed to the bolt head.

The pinhole may be formed as an inclined hole inclined so that the inner side is narrower than the outer side, or a horizontal hole may be formed to extend at an end of the inclined hole. The horizontal pin includes a rod body having a concave groove formed therein, and an elastic piece coupled to the concave groove to be pressurized. The rod body is formed to be the same as the inner diameter of the pinhole. The elastic piece includes an elastic body through which the inside is penetrated, and an opening cut at one side so that the elastic body can be compressed.

The method for connecting piles of the present invention includes: a lower joint plate fixing step of fastening and fixing a lower joint plate having a lower protrusion radially protruding on the upper surface to the head of the lower pile with a lower bolt; An upper joint plate fixing step of fastening and fixing an upper joint plate having an upper projection radially protruding on the lower surface to the tip of the upper pile with an upper bolt; a lower pile insertion step of inserting the lower pile to which the lower joint plate is fixed into the service hole for pile connection; an upper pile mounting step of mounting an upper pile in which an upper joint plate is fixed to an upper part of the lower pile inserted into the service hole; A mounting completion step of seating the upper piles on the lower piles so that the upper protrusions of the upper joint plates are engaged between the lower protrusions of the lower joint plates, and at the same time pinholes are formed on one side or both sides of the lower protrusions and the upper protrusions; a horizontal pin coupling step of inserting a horizontal pin into the pinhole and fixing the blow to combine the upper and lower joint plates; A joint construction completion step of completing the joint construction of the pile by horizontal pin coupling; includes, a compression pad is installed on the head of the lower bolt and the upper bolt, and the compression pad is the upper pile in the upper pile mounting completion step It is pressurized by the weight of the chair and pressed to the head of the bolt to prevent loosening of the bolt due to driving vibration.

In addition, as described above, when the drilling method of inserting the pile into the drilling hole and then driving the drilling method is not used, and the drilling method is not formed and the drilling hole is not formed and the pile is penetrated into the ground by driving from the beginning. How to connect the piles of the present invention Silver, a lower joint plate fixing step of fastening and fixing the lower joint plate with the lower projection radially protruding on the upper surface to the head of the lower pile penetrated into the ground by driving with a lower bolt; An upper joint plate fixing step of fastening and fixing an upper joint plate having an upper projection radially protruding on the lower surface to the tip of the upper pile with an upper bolt; 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 piles on the lower piles so that the upper protrusions of the upper joint plates are engaged between the lower protrusions of the lower joint plates, and at the same time pinholes are formed on one side or both sides of the lower protrusions and the upper protrusions; a horizontal pin coupling step of inserting a horizontal pin into the pinhole and fixing the blow to combine the upper and lower joint plates; A joint construction completion step of completing the joint construction of the pile by horizontal pin coupling; may include.

According to the present invention, since the protrusion side of each joint plate is inclined to easily match the centers of the lower and upper piles, it is possible to shorten the working time and improve the working efficiency through rapid work.

In addition, according to the present invention, the compression pad installed on the head of the bolt for fixing the joint plate to the pile is compressed by the pressure by the weight of the upper pile, and when the connecting pile connected to the lower pile and the upper pile is driven, the bolt by driving vibration As it can prevent the loosening of the pile, it is effective in firmly constructing the pile joint.

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

1 is a flowchart of a pile connection method to which the present invention is applied
Figure 2 is an exploded perspective view of the pile connection device to which the present invention is applied;
Figure 3 is an exploded perspective view showing the lower joint plate and the upper joint plate of the pile connection device to which the present invention is applied;
Figure 4 is an exploded perspective view showing the horizontal pin of the pile connection device to which the present invention is applied
5 to 6 are schematic views showing the installation state of the pile connection device to which the present invention is applied
Figure 7 is a cross-sectional view showing the bolt coupling part of the pile connection device to which the present invention is applied
8 to 9 are views of the horizontal pin coupling state of the pile connecting device to which the present invention is applied.
10 is an enlarged cross-sectional view of FIG.
11 is an enlarged cross-sectional view showing another embodiment of the horizontal pin of the pile connection device to which the present invention is applied
Figure 12 is a coupling state diagram showing another embodiment of the horizontal pin of the pile connection device to which the present invention is applied
13a to 13b are graphs showing bending performance test photos and bending performance test results of the pile connection 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 connection 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 compression performance test photos and compression performance test results of the pile connection device to which the present invention is applied
17a to 17c are driving test photos to confirm 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 based on the accompanying drawings. 1 is a flowchart of a pile connection method to which the present invention is applied, FIG. 2 is an exploded perspective view of a pile connection device to which the present invention is applied, and FIG. 3 is a separation showing a lower joint plate and an upper joint plate of a pile connecting device to which the present invention is applied is a perspective view.

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

The lower joint plate 110 is configured to be fastened 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 in close contact with the head of the lower pile (10).

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

The first lower through-hole 113 is a through-hole through which the lower bolt S moves inside the lower protrusion 112 .

In addition, the 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 for accommodating the PC nut is formed on the lower surface of the lower joint plate 110 on the same line as the PC nut of the lower pile 10 .

The upper joint plate 120 is configured to be fastened to the tip of the upper pile 120 with an upper bolt (S'), and is composed 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 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 a side surface thereof may protrude obliquely.

The first upper through-hole 123 is a through-hole through which the upper bolt S' moves inside 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 so that the head of the lower bolt S protruding above the upper surface of the lower protrusion 112 is accommodated.

A receiving groove 125 for accommodating the PC nut is formed on the upper surface of the upper joint plate 120 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.

The pinhole 140 is one of the lower protrusion 112 and the upper protrusion 122 when the lower protrusion 112 of the lower joint plate 110 and the upper protrusion 122 of the upper joint plate 120 are engaged. In a configuration formed through the side or both sides, 1/2 may be formed on each protrusion.

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

In the pinhole 140 , a horizontal hole 142 is horizontally formed at an end of the inclined hole 141 .

The horizontal pin 150 is configured to be coupled to the pinhole 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 configured to be coupled to the pinhole 140 and has an inclined outer surface.

The concave groove 152 is concave at the front end of the rod body 151 , that is, at the end portion first coupled to the pinhole 140 .

The elastic piece 153 is coupled to the concave groove 152 to be 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 is in the form of a hollow part 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.

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 when the horizontal pin 150 is inserted into the pinhole 140 , and thus the horizontal pin by driving vibration. 150 serves to prevent the separation or coupling force from being relaxed in the pinhole 140 .

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 brought into close contact with the upper surface of the lower pile 10 , that is, the head.

The receiving groove 115 formed on the lower surface of the lower joint plate 110 should be positioned on the same line as the PC nut of the lower pile 10, in which case the end of the PC nut protrudes from the upper surface of the lower pile 10. In this 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 in a state in which the PC nut protrudes to the upper surface of the lower pile 10 . When the PC nut is pressed 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. will make it

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 brought into 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 should be positioned on the same line as the PC nut of the upper pile 20, in which case the end of the PC nut protrudes from the lower surface of the upper pile 20. In this 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 stake 20 in a state where the PC nut protrudes to the lower surface of the upper pile 20 . As the PC nut is compressed in the body direction of the upper pile 20 by the upper joint plate 120, longitudinal cracks occur in the upper pile 20, and the receiving groove 125 prevents this phenomenon. will make it

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 By fastening to the nut, the upper joint plate 120 is fixed to the upper pile 20 .

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 projections 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 pressurization of the lower and upper surfaces of the upper and lower piles by the weight of the upper pile (20). By generating compressive stress and frictional stress in the head of (S'), loosening of bolts (S)(S') can be prevented 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 lower bolt S' 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 ( 20), 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, and 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 respectively fixed to the upper surface of the lower pile 10 and the lower surface of the upper pile 20 through the above process, the lower pile 10 is lifted with a lifting device to lift the pile. Insert it into the service hole drilled in the ground for connection.

The upper end of the lower pile 10 inserted into the service hole should be located above the service hole, and the upper pile 20 is lifted with a lifting device and mounted on 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 the lower pile 10 . ) is engaged between the lower protrusions 112 of the lower joint plate 110 fixed to it.

Since the upper protrusion 122 and the lower protrusion 112 have inclined sides, they can be easily combined, thereby shortening the work time by improving work efficiency.

When the upper protrusion 122 is engaged with the lower protrusion 112 and coupled to each other, the compression pad 130 installed on the head of the lower bolt S and the upper bolt S' to understand 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, respectively, and at the same time, the compression pad 130 is compressed to the head of the bolts (S) (S') to obtain compression stress and frictional stress. cause. Therefore, when the connecting pile is driven, the force to loosen the bolt (S) (S') by driving vibration is caught by the compression stress and frictional stress acting on the compression pad 130, thereby loosening the bolt (S) (S'). to prevent

That is, in order for the bolt (S) (S') to be loosened by the driving vibration, the bolt must move in the direction of the head while rotating in the opposite direction to the fastening, and the rotation of the bolt is suppressed by the frictional stress generated by the compression pad 130 and Movement in the head direction is suppressed by the compression stress generated by the compression pad 130 to suppress loosening of the bolt, and if the bolt is loosened 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 with the lower protrusion 112 of the lower joint plate 110, the side surfaces of each of the protrusions 122 and 112 are in close contact with each other. Pinholes 140 facing each other by 1/2 are formed on one side or both sides.

The pinhole 140 may be formed as an inclined hole 141 inclined to be narrower on the inner side than the outer side, and a horizontal hole 142 may extend at an end of the inclined hole 141 .

As 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 to the pile connecting device 100. Safety can be improved, and the protrusions 122 and 112 are formed to be inclined so that the central axes of the lower joint plate 110 and the upper joint plate 120 can be easily matched, thereby reducing the working time by improving work efficiency. can

And as shown in FIGS. 8 to 10 , the joint construction of the pile can be completed by coupling the horizontal pin 150 to the pinhole 140 . 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 an outer inner diameter of the inclined hole 141 of the pinhole 140. can be moved smoothly.

When the horizontal pin 150 is moved to the inside of the inclined hole 141 by a certain distance, 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 the rod body 151 of the horizontal pin 150 is hit, the elastic body 154 of the elastic piece 153 along the inner diameter of the inclined hole 141 moves into the concave groove 152 with the opening 155 as the center. As it shrinks, it moves to the inside of the inclined hole 141 .

At this time, the elastic piece 153 passes through the inclined hole 141 while retracting along the inner diameter of the inclined hole 141 , and then moves to the horizontal hole 142 , and the elastic piece 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 pile 10 and the upper stake 20 are coupled to the lower part. 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 elastically attached to 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 and upper joint plates By maximizing the adhesion of the (110) and (120), the lower and upper joint plates (110, 120) are firmly connected to each other, and separation of the horizontal pin (150) by driving vibration can be prevented.

11 shows a plurality of elastic pieces 153 ′, 153 ″ instead of coupling a horizontal pin 150 composed of a rod body 151 and an elastic piece 154 to the pinhole 140 , and a horizontal hole having the same inner diameter over the entire length. It shows that the lower joint plate 110 and the upper joint plate 120 are connected 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 that of the horizontal hole 142 and having an opening 155 ′ while having the same shape as that of the horizontal hole 142 , and a first elastic member inserted and coupled to 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 entire outer diameter of the first elastic piece 153' is pressed into the inner surface of the horizontal hole 142 in the pinhole 140 formed by coupling the lower joint plate 110 and the upper joint plate 120 to the first elastic piece ( 153') and push it into the pinhole 140. Next, in the same manner, the second elastic piece 153" is hit against the inner diameter of the first elastic piece 153' and pressed to be compressed, so that the entire outer diameter of the second elastic piece 153" is the first elastic piece 153'. ) to be compressed on the inner diameter of the inner surface. The first and second elastic pieces 153' and 153" coupled to each other while being pressed into the pinhole 140 have the same function as the above-described horizontal pins 150. The first and second elastic pieces 153' coupled in this way , 153"), the openings 155' and 155" 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 first and secondly formed 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 ′ extends and restores its own elasticity by allowing the elastic piece 153 to pass through the horizontal hole 142 , and the end of the elastic piece 153 has each protrusion 112 , 122 . ) by being caught in close contact with the inner surface, preventing the 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 and It is possible to increase the connection force of the upper joint plate 120 .

The lower pile 10 and the upper pile 20 can be driven into the ground by driving the connecting pile, and when the connecting pile is driven, the compression pad 130 is the lower bolt (S) and the upper bolt (S'). ) to prevent loosening of each bolt (S) (S'), 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. By elastically coupling with the horizontal pin 150, it is possible to increase the connection force of the pile while easily constructing the pile connection.

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

Test method: KS F 4306

Specimen Specification: Diameter 500mm, length 5m Connect 2 PHC piles (Class A) with a connecting device

Flexural strength test result

division crack load Crack Flexural Strength breaking load Fracture Flexural Strength remark Based on KS F 4306 59.6 kN 103.0 kN m 92.9 kN 155.0 kN m PHC pile A standard value Test result 99.0 kN 130.5 kN m 133.8 kN 174.0 kN m Criterion Satisfaction

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

Test method: KS F 4306

Specimen specification: 500mm in diameter, 5m in length PHC piles (Class A) are connected by a connecting device.

Shear strength test result

division maximum load shear strength remark Based on KS F 4306 457.2 kN 228.6 kN PHC pile A standard value Test result 762.5 kN 381.2 kN Criterion Satisfaction

In addition, in Table 3, the tensile performance of the pile connecting device 100 was measured, 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: diameter 500mm pile connector

Tensile test result

division The tensile strength remark Based on KS F 4306 749.5 kN PHC pile A standard value Test result 941.7 kN Criterion Satisfaction

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

Test method: Compression test for pile connector

Specimen Specifications: Diameter 500mm, 1.0m PHC Pile (Class A) Pile Connection Device

Compression test result

division compressive strength remark Based on KS F 4306 2,970 kN UPHC pile A standard value Test result More than 5,035 kN Criterion Satisfaction

As can be seen from the above test results, it can be seen that the present invention pile connection device 100 is a product with excellent performance that satisfies all the reference values according to the KS F 4306 test.

In addition, when the pile connected to the pile connection device 100 of the present invention is driven, whether each bolt (S) (S ') is loosened by driving vibration and whether the horizontal pin 150 fixed to the pinhole 140 is separated. investigated. To this end, 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, the bolts (S) (S ') head part fastened to the joint plate and the joint plate A continuous straight line was marked on the , 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 device. After driving more than 100 times using a hammer to the pile connected in this way, the degree of intersection of the continuous straight line drawn on the joint plate and the bolt (S) (S') head was checked, and the joint as shown in FIGS. 17b to 17c It was confirmed that the bolt (S)(S') was not loosened at all by the driving vibration by maintaining the same continuous state as before the driving.

In addition, as a result of performing a dynamic load test while driving the pile connected to the pile connecting device 100 of the present invention, the connection state of the pile connecting device 100 is 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 by driving vibration because it appeared to be coupled.

As described above, although the present invention has been described with reference to limited embodiments and drawings, the terms or words used in the present specification and claims should not be construed as being limited to conventional or dictionary meanings, and the technical spirit of the present invention It must be interpreted with a corresponding meaning and concept. Accordingly, the configuration shown in the embodiments and drawings described in the present specification is only one embodiment of the present invention, and does not represent all the technical spirit of the present invention, so within the limit that does not depart from the scope of the claims of the present invention, various It should be understood that there may be equivalents and variations.

10: lower pile 20: upper pile
100: pile connector 110: lower joint plate
120: upper joint 130: compression pad
140: pinhole 150: horizontal pin

Claims (12)

a lower joint plate with a lower protrusion radially protruding from the upper surface and fastened to the head of the lower pile with a lower bolt;
an upper joint plate having an upper protrusion radially protruding from a lower surface to engage between the lower protrusions of the lower joint plate, and fastening and fixing 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 one or both sides of the lower protrusion of the lower joint plate and the upper protrusion of the upper joint plate; and
A horizontal pin comprising a rod body having a concave groove formed thereon and an elastic piece that is pressably coupled to the concave groove to be coupled by hitting the pin hole; and
The compression pad is pressed to the head of each bolt by pressing by the weight of the upper pile, pile connection device, characterized in that to prevent loosening of the bolt by driving vibration. The method according to claim 1,
The lower joint plate, the lower plate body; a lower projection radially protruding from the upper surface of the lower plate body; a first lower through-hole penetrating into the lower protrusion;
The upper joint plate, the upper plate body; an upper projection radially protruding from the lower surface of the upper plate body; A pile connecting device comprising a; a first upper through-hole penetrated inside the upper protrusion. 3. The method according to claim 2,
A second lower through-hole penetrated to receive the head of the upper bolt protruding below the lower surface of the upper projection in the lower plate body between the lower projections;
A pile connecting device further comprising a; a second upper through-hole through the upper plate body between the upper protrusions to receive the head of the lower bolt protruding above the upper surface of the lower protrusion. 3. The method according to claim 2,
The pile connecting device further comprising: 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 method according to claim 1,
The compression pad is a pile connecting device, characterized in that formed of an elastic material. delete The method according to claim 1,
The pinhole is a pile connecting device, characterized in that the inner side is narrower than the outside is formed as a sloped hole, or a horizontal hole is formed to extend to the end of the inclined hole. The method according to claim 1,
The pinhole is formed as an inclined hole inclined so that the inner side is narrower than the outer side, and a horizontal hole is extended at the end of the inclined hole,
When the horizontal pin is moved 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 in this state, when the rod of the horizontal pin is struck, the elastic piece moves along the inner diameter of the inclined hole. 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 and the outer surface of the rod is in close contact with the inner surface of the inclined hole by moving to the horizontal hole after passing through the inclined hole while being concave into the concave groove. The method according to claim 1,
The pinhole is formed as an inclined hole inclined so that the inner side is narrower than the outer side, and a horizontal hole is extended at the end of the inclined hole,
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 with its own elasticity, and the end of the elastic piece is brought into close contact with the inner surface of the upper and lower projections of the upper and lower joint plates while the diameter is expanded. Device. The method according to claim 1,
The elastic piece may include: an elastic body of a hollow part through which the inside is penetrated; and an opening cut at one side so that the elastic body can be expanded or retracted. The method according to claim 1,
The horizontal pin coupled by hitting the pinhole has the same improvement as the horizontal hole and has the same shape as the first elastic piece having an opening while having an outer diameter somewhat larger than the size of the horizontal hole and the first elastic piece inserted and coupled to the horizontal hole while having the same shape. A pile connecting device, characterized in that it is composed of a second elastic piece having an opening while the outer diameter is somewhat larger than the inner diameter of the first elastic piece. A lower joint plate fixing step of fastening and fixing a lower joint plate having a lower protrusion radially protruding on the upper surface to the head of the lower pile with a lower bolt;
An upper joint plate fixing step of fastening and fixing an upper joint plate having an upper projection radially protruding on the lower surface to the tip of the upper pile with an upper bolt;
a lower pile insertion step of inserting the lower pile to which the lower joint plate is fixed into the service hole for pile connection;
an upper pile mounting step of mounting an upper pile in which an upper joint plate is fixed to an upper part of the lower pile inserted into the service hole;
The upper pile is seated on the lower pile and the upper protrusion of the upper joint is engaged between the lower protrusions of the lower joint, and at the same time, pinholes are formed on one side or both sides of the lower protrusion and the upper protrusion. step;
a horizontal pin coupling step of inserting a horizontal pin composed of a rod having a concave groove formed in the pinhole and an elastic piece that is compressably coupled to the concave groove and then fixing the blow to couple the upper and lower joint plates;
Including; a joint construction completion step of completing the joint construction of the pile by combining horizontal pins;
A compression pad is installed on the head of the lower bolt and the upper bolt,
The compression pad is pressed against the head of the bolt under pressure by the weight of the upper pile, and the pile connection method using a pile connecting device, characterized in that it prevents the bolt from being loosened by driving vibration.

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