KR101867356B1

KR101867356B1 - Connecting apparatus of composit pile

Info

Publication number: KR101867356B1
Application number: KR1020170143385A
Authority: KR
Inventors: 차행탁; 김진수
Original assignee: (주)금산
Priority date: 2017-10-31
Filing date: 2017-10-31
Publication date: 2018-06-15

Abstract

The present invention relates to a composite pile connection apparatus, and more particularly to a composite pile connection apparatus capable of easily and firmly connecting a PHC pile and a steel pipe pile and minimizing friction upon penetration, A composite pile connection device for connecting a steel pipe pile to a PHC pile having a plurality of fixing long nuts at a predetermined angle, the composite pile connection device being mounted on a top surface of the PHC pile and corresponding to a long nut for fixing the steel wire of the PHC pile A circular fixing plate in which a plurality of fastening holes are formed and a plurality of joining grooves opened to the outside are formed on the rim; And a plurality of vertical support members formed in a vertical direction on the inner side of a predetermined width from the rim of the circular fixing plate so that a part thereof is positioned on the inner side of the joining groove, And the lower end of the vertical support member are welded together with the joint groove of the circular fixing plate.

Description

Connecting apparatus of composite pile

The present invention relates to a composite pile connecting apparatus, and more particularly, to a composite pile connecting apparatus capable of connecting a PHC pile and a steel pipe pile in a simple and robust manner and minimizing friction during penetration.

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.

On the other hand, the supporting layer for pile construction is located at a depth of several tens of meters from the surface of the ground. In case of pile, the pile is manufactured to have a length of about 10 m 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 can be constructed by using the pneumatic method, so it is widely used when it is intended to construct structures on soft ground.

In particular, the PHC pile has no problem in applying the PHC pile because it has a comparative advantage in terms of the workability as well as the economical efficiency in the case of the structure having a large vertical force as compared with the steel pipe pile. However, In a structure having a large influence of the horizontal force (shearing force) and the bending moment, the resistance to such a structure is small, so that a relatively expensive steel pipe pile has to be inevitably used. The steel pile pile is uniform in material of the pile so that the resistance against the load is uniform over the entire length of the pile. In particular, the pile is superior in resistance to shear force and bending moment. However, the material cost is high.

On the other hand, when calculating the bending moment according to the depth acting on the pile installed on the ground, bending stress and vertical stress act on the upper part of the pile, Only the normal stress acts on the bottom. Therefore, considering the bending moments according to the depth of the ground and the characteristics of each pile, the upper pile near the surface uses a steel pipe pile having high resistance against shear force and bending moment. , And a composite pile combining a PHC pile and a steel pipe pile to use a PHC pile having a relatively low material cost has been proposed in Patent Documents 0001 to 0005.

Patent Literature 0001 relates to a composite pile connection device, which connects a PHC pile and a steel pipe pile using a pile connection having a mounting tuck formed so as to be individually fastened to a steel wire fixing nut of a PHC pile, So that the operator can easily handle the pile connector. Thus, in the process of connecting the steel pipe pile to the PHC pile, it is possible to use the guide portion at a desired position So that it is possible to perform a joint operation while easily rotating the steel pipe pile through a pedestal through a desired angle even when the piles are laid in a lying state. However, since the head of the bolt member is exposed to the outer surface of the lower portion, there is a problem that the frictional force is increased when the penetration is made.

Patent Literature 0002 can accurately and easily perform the centering operation for making the center of the PHC pile coincide with the center of the steel pipe pile in placing the steel pipe pile on the lower PHC pile and forming the composite pile by integrating them with each other, The PHC pile and the steel pipe pile are integrally formed by using a joint connector for preventing the pile from moving due to the clearance in the transverse direction, and further, solid integration with the concrete foundation can be achieved. However, since the head of the bolt member is exposed to the outer surface of the lower portion of the steel pipe pile, there is a problem that frictional force is increased at the time of penetration.

Patent Literature 3 relates to a composite pile joint device, in which, during the process of connecting a steel pipe pile to the upper part of a PHC pile, a joint of a steel pipe pile having various diameters and thickness is installed through a pile connection, There is a possible advantage. However, since the vertical plate and the fastening member of the pile connection are exposed on the outer side of the lower part of the steel pipe pile, there is a problem that the frictional force increases when the pipe is penetrated.

Patent Document 0004 relates to a connection portion of a composite pile formed by integrally connecting a PHC pile and a steel pipe pile, in which a center of a pile and a center of a steel pipe are matched with each other (a so-called "centering operation" And to connect the PHC pile and the steel pipe pile rigidly to each other. However, since the head of the bolt for fixing the steel pipe pile is exposed on the outer side of the composite pile coupling part, there is a problem that the frictional force increases when the penetration is made.

Patent Document 0005 discloses a composite pile formed by integrally connecting a PHC pile and a steel pipe. When a PHC pile and a steel pipe are combined to form a composite pile, the center of the PHC pile and the center of the steel pipe ("Centering operation") can be performed accurately and easily, and the steel pipe and the PHC pile can be joined more firmly, and the joining operation can be easily performed between the steel pipe and the PHC pile The present invention relates to a composite pile of a PHC pile and a steel pipe. However, since the vertical plate for fixing the steel pipe and the head of the bolt are exposed, there is a problem that the frictional force increases when the pipe is penetrated.

KR10-2016-0003469A (2016.01.11) KR10-1683613B1 (2016.12.01) KR10-2017-0064350A (2017.06.09) KR10-1551130B1 (2015.09.01) KR10-1116389B1 (Feb. 7, 2012)

SUMMARY OF THE INVENTION It is an object of the present invention to provide a composite pile connecting apparatus capable of easily and firmly bonding a PHC pile and a steel pipe pile and minimizing friction during penetration.

1. A composite pile connecting device for connecting a steel pipe pile to a PHC pile having a long nut for fixing a steel wire with a steel wire fixed on an upper surface at a predetermined angle,

A circular fixing plate which is seated on the upper surface of the PHC pile and has a plurality of fastening holes at positions corresponding to the long nuts for fixing the steel wires of the PHC pile and has a plurality of joint grooves opened to the outside at the rim;

And a plurality of vertical supporting members formed in a vertical direction inside the predetermined width from the rim of the circular fixing plate so that a part thereof is positioned on the inner side of the joining groove,

And the lower end of the steel pipe pile and the lower end of the vertical support member located on the joint groove of the circular fixing plate are welded together with the joint groove of the circular fixing plate.

The joint groove may be formed so that its width gradually decreases from the outer side to the inner side.

It is preferable that the outer diameter of the circular fixing plate is the same as the outer diameter of the steel pipe pile, and the slope is formed in the rim of the circular fixing plate.

In particular, the reinforcing rib may be provided between the upper surface of the circular fixing plate and the inner surface of the vertical supporting member to reinforce the vertical supporting member.

The reinforcing rib may be formed with an extension support portion extending downward to support the inner side surface of the PHC pile.

The composite pile connecting device of the present invention can easily and firmly bond the PHC pile and the steel pipe pile and minimize the friction during penetration.

1 is a perspective view schematically showing an embodiment of a composite pile connecting device of the present invention,
2 is a plan view schematically showing a plan view of the composite pile connecting device of the present invention.
3 is a perspective view schematically showing a state in which a composite pile connecting device is fastened and fixed to a PHC pile,
Fig. 4 is a longitudinal sectional view showing a longitudinal section along the line AA in Fig. 3,
5 is a perspective view schematically showing a state in which a steel pipe pile is inserted and fixed to a composite pile connecting device,
6 is a longitudinal sectional view showing a longitudinal section along the line BB in Fig.
7 is a longitudinal sectional view schematically showing a state in which a steel pipe pile is inserted and fixed in a composite pile connecting device having a circular fixing plate having a slope on a rim.
8 is a vertical sectional view showing a state in which a steel pipe pile is joined to a composite pile connecting device.
FIG. 9 is a longitudinal sectional view showing a state in which a PHC pile and a steel pipe pile are connected using a composite pile connecting device having a reinforcing rib provided with an extended support portion.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The scope of the present invention is not limited to the following embodiments.

FIG. 1 is a perspective view schematically showing an embodiment of a composite pile coupling device of the present invention, and FIG. 2 is a plan view schematically showing a plan view of a composite pile coupling device of the present invention.

The composite pile connecting device 10 of the present invention is for connecting a steel pipe pile 50 to a PHC pile 30 having a plurality of long nuts for fastening a steel wire to which a steel wire is fixed on an upper surface at a predetermined angle, And a circular fixing plate 110 and a vertical support member 120 as shown in FIG.

First, the circular fixing plate 110 is formed in the same circular shape as the PHC pile 30 and the steel pipe pile 50 as shown in FIGS. Particularly, the outer diameter of the circular fixing plate 110 is set so that the PHC pile 30 and the PHC pile 50 may be formed in the same manner as the PHC pile 50, (Not shown). In addition, a through hole having an inner diameter corresponding to the inner diameter of the PHC pile 30 may be formed at the center of the circular fixing plate 110.

A plurality of fastening holes 111 are formed in the circular fixing plate 110 at positions corresponding to the long nuts 310 for fixing the steel wires of the PHC pile 30 and the joint grooves 112 opened outward at the rim .

The coupling hole 111 is for fixing the circular fixing plate 110 to the PHC pile 30 by bolts.

The joint groove 112 is for joining the steel pipe pile 50 to the circular fixing plate 110 in a state where a bolt or the like does not protrude from the outer surface of the steel pipe pile 50 as in the prior art. The joint groove 112 is disposed such that a portion of the lower end of the steel pipe pile 50 and a lower portion of the vertical support member 120 are in contact with the joint groove 112, The steel pipe pile 50 and the vertical supporting member 120 can be joined to the circular fixing plate 110 at the same time without a portion protruding from the outer side surface of the inner pipe 50. Thus, There is an advantage to be able to.

At this time, it is preferable that the joint groove 112 is formed so that the width becomes narrower toward the inner side as shown in Fig. 2 in order to improve the joint strength and welding workability of the weld joint.

The vertical support member 120 is for fixing the steel pipe pile 50 to the circular fixing plate 110 so as to have the same axis as the axis of the PHC pile 30, Are formed in the vertical direction inside the predetermined width from the rim.

At this time, the vertical support member 120 is formed on the circular fixing plate 110 such that the vertical supporting member 120 is positioned on the inner side of the bonding groove 112. The outer surface of the vertical support member 120 is formed on the inner side of the outer circumference of the circular fixing plate 110 so as to be located inside the steel pipe pile 50.

At this time, the predetermined width corresponds to the thickness of the steel pipe pile (50).

The outer surface of the vertical support member 120 may have the same curvature as the inner diameter of the steel pipe pile 50 to effectively support the steel pipe pile 50 in surface contact.

In order to reinforce the support force of the steel pipe pile 50 by the vertical support member 120 when horizontal force and moment act on the steel pipe pile 50 to a great extent, And a reinforcing rib 130 that is joined between the upper surfaces of the upper and lower plates 110, respectively.

FIG. 3 is a perspective view schematically showing a state in which a composite pile connecting device is fastened and fixed to a PHC pile, and FIG. 4 is a vertical sectional view showing a longitudinal section along the line A-A in FIG.

In order to connect the PHC pile 30 and the steel pipe pile 50 on the same axis line by using the composite pile connection device 10, the composite pile connection device 10 is first assembled as shown in FIG. 3 and FIG. And the PHC pile 30 is fastened and fixed using bolts 20.

At this time, the bolts 20 are fastened to the long nuts 310 for fixing the steel wires of the PHC pile 30 through the fastening holes 111 of the circular fixing plate 110 of the composite pile connecting device 10.

As shown in FIG. 4, the joint groove 112 of the circular fixing plate 110 is formed inwardly in the rim portion, so that there is no portion protruding outward beyond the outer surface of the PHC pile 30.

FIG. 5 is a perspective view schematically showing a state in which a steel pipe pile is inserted and fixed in a composite pile connecting device, and FIG. 6 is a vertical sectional view showing a longitudinal section along the line B-B in FIG.

Next, a circular fixing plate 110 of the composite pile connecting device 10 is fixed to the PHC pile 30 using bolts 20, and then a steel pipe pile 50 (see FIG. 5) is formed on the circular fixing plate 110, ).

At this time, the vertical support member 120 is inserted into the inner surface of the steel pipe pile 50 to support the steel pipe pile 50 in the vertical direction on the same axis as the axis of the PHC pile 30.

As shown in FIG. 6, a portion of the lower end of the steel pipe pile 50 is seated on the joint groove 112 formed in the circular fixing plate 110.

FIG. 7 is a longitudinal sectional view schematically showing a state in which a steel pipe pile is inserted and fixed in a composite pile connecting device having a circular fixing plate having a slope 115 on a rim.

When the steel pipe pile 50 is mounted on the composite pile connecting device 10, the steel pipe pile 50 is inserted into the center of the circular fixing plate 110 of the composite pile connecting device 10 in a vertical direction It is preferable that the inclined surface 115 is formed at the edge of the circular fixing plate 110 as shown in FIG.

The inclined surface 115 is formed to be inclined outward toward the lower side.

8 is a longitudinal sectional view showing a state in which a steel pipe pile is joined to a composite pile connecting device.

After the steel pipe pile 50 is inserted and fixed on the composite pile connecting device 10, welding is performed to the joint groove 112 of the circular fixing plate 110 by using a welding machine as shown in FIG. The joint groove 112 is welded 70 so that a part of the lower end of the circular pipe 110 and the lower end of the vertical support member 120 are integrally joined.

The steel pipe pile 50 is joined to the circular fixing plate 110 and is connected to the horizontal supporting member even if a horizontal force and a moment are applied to the steel pipe pile 50, 110 or the lower end of the steel pipe pile 50 is not deformed.

9 is a longitudinal sectional view showing a state in which a PHC pile and a steel pipe pile 50 are connected using a composite pile connecting device having a reinforcing rib formed with an extended support portion 132. [

Meanwhile, in order to prevent the circular fixing plate 110 from being separated from the PHC pile 30 when a large horizontal force and a moment are applied to the steel pipe pile 50, the extension supporting part 132 is integrally formed with the reinforcing rib 130 . The extended support portion 132 extends downward to the reinforcing rib 130 to support the inner surface of the PHC pile 30.

10: Composite pile connection device,
110: circular fixing plate,
112: joint groove,
120: vertical support member,
130: reinforcing rib,
20: Bolts,
30: PHC pile,
310: Long nut,
320: Steel wire,
50: Steel pipe pile

Claims

A composite pile connecting device for connecting a steel pipe pile to a PHC pile having a plurality of long nuts for fastening a steel wire,
A plurality of fastening holes are formed at positions corresponding to the long nuts for fastening the steel wires of the PHC pile, and a plurality of fastening holes are formed on the upper surface of the PHC pile to open outward in the rim and to have a width gradually narrower from the outer side toward the inner side. A circular fixing plate having an outer diameter equal to the outer diameter of the steel pipe pile and having an inclined surface inclined downward on an upper surface of the rim;
And a plurality of vertical supporting members formed in a vertical direction inside the predetermined width from the rim of the circular fixing plate so that a part thereof is positioned on the inner side of the joining groove,
Wherein the lower end of the steel pipe pile and the lower end of the vertical support member located on the joint groove of the circular fixing plate are welded together with the joint groove of the circular fixing plate.

The method according to claim 1,
A reinforcing rib which is joined between an upper surface of the circular fixing plate and an inner surface of the vertical supporting member to reinforce the vertical supporting member;
And an extension supporting portion extending downward from the reinforcing rib to support an inner surface of the PHC pile.

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