KR20170041940A

KR20170041940A - Hybrid pile

Info

Publication number: KR20170041940A
Application number: KR1020150140916A
Authority: KR
Inventors: 이대용; 엄순섭; 황의성
Original assignee: 주식회사 포스코; 한우물중공업 주식회사; 신아산업개발주식회사
Priority date: 2015-10-07
Filing date: 2015-10-07
Publication date: 2017-04-18

Abstract

The present invention provides a composite file that enables simple and robust interconnection of steel pipe files on top of a PHC file. The composite file according to the preferred embodiment of the present invention comprises a hollow steel pipe body A socket plate joined to the socket plate and provided with an outer diameter smaller than the outer diameter of the steel pipe body and having a thread formed on an outer circumferential surface thereof and a flange formed on an inner side thereof, file; A PHC file having a concrete body having a hollow portion and a step portion formed at one end thereof, and a reinforcing band inserted into the concrete body and provided with an outer diameter corresponding to the connection socket, And a screw coupling pipe which is formed with a thread on an inner circumferential surface and is coupled to the thread of the reinforcing band and moves along the thread of the reinforcing band and the thread of the connection socket and couples the pipe tube and the PHC pile, In order to connect the PHC file to the ground in the field and then to connect the PHC file to the top of the PHC file in the longitudinal direction, The construction time can be shortened and the construction cost can be reduced.

Description

Compound file {HYBRID PILE}

The present invention relates to a compound file which improves the coupling structure of a PHC file and a steel pipe file.

Generally, a pile is a structural element used to transfer the load transferred from the upper structure to the lower ground. The pile is largely divided into a concrete pile and a steel pile depending on the constituent material. The main characteristics of this type are the use of high strength concrete and the introduction of prestressing force using steel wire, so that the strength of concrete pile and the strength of concrete pile And the stiffness can be effectively improved. Also, a circular steel pipe file is a representative type of steel pile.

The PHC file has an advantage that the bottom end bearing capacity is excellent and the price is lower than that of the steel pipe file. The steel pipe file is excellent in resistance against the flexural load and has an advantage of being easily inserted into a hard ground.

Recently, a compound file has been developed to take full advantage of these two types of advantages. This is a new type of file, which is a combination of two different structural materials by linking and integrating steel pipe files at the top of the PHC file.

The composite file is usually constructed so that the PHC file is firstly pivoted or embedded to the planned depth, then the steel pipe file is connected to the top of the pipe, and then the additional file is loaded to secure the final planned depth. At this time, It is necessary to connect the steel pipe files in the longitudinal direction.

Accordingly, in the prior art, a welding connection method in which a connection portion of a PHC file and a steel pipe file are welded and connected, or a bolt connection method using a bolt as a fastening member is assembled. There is a problem that the air is delayed.

Further, in the case of the welding connection, there is a problem that it is difficult to secure the required quality depending on the working environment as the work is performed in the field, and there is also a problem that the work progress itself is impossible due to a weather condition such as rain.

In addition, although the workability and work efficiency of the bolt connection is increased in the field as compared with the welding connection, it is inconvenient to separately manufacture the bolt fastening part, and additional cost is incurred by separately manufacturing the bolt fastening component Thereby increasing the construction cost as a whole.

Korean Patent No. 646259 (2006.11.08) Japanese Patent No. 5149360 (2012.12.07) Korean Registered Patent No. 1543961 (2015.08.05)

SUMMARY OF THE INVENTION The present invention has been made in order to solve such a problem, and it is an object of the present invention to provide a composite file in which a steel pipe file can be simply and firmly interconnected at the top of a PHC file.

In order to accomplish the above object, according to a preferred embodiment of the present invention, there is provided a composite file comprising a hollow steel pipe body having a structure supported at one end thereof, a socket plate joined to the other end of the steel pipe body, A steel pipe file having a connection socket provided with an outer diameter smaller than the outer diameter of the steel pipe body and formed with threads on an outer circumferential surface thereof and having an end formed with a flange inward; A PHC file having a concrete body having a hollow portion and a step portion formed at one end thereof, and a reinforcing band inserted into the concrete body and provided with an outer diameter corresponding to the connection socket, And a screw coupling pipe having a thread formed on an inner circumferential surface thereof and coupled to the thread of the reinforcing band and moving along the thread of the reinforcing band and the thread of the connection socket and coupling the pipe pipe with the PHC pile.

The PHC file includes a cap plate disposed to cover both side ends of the concrete body and having a plurality of latching grooves formed thereon, and a cap plate inserted into the concrete body and positioned at both ends of the concrete body, And may further include a plurality of steel wires to which the opposite ends are respectively fixed.

The cap plate may further have a hole formed in the hollow portion of the concrete body, and a hook formed in the flange formed on the inner side of the connection socket and inserted into the hole.

The cap plate may further include protrusions provided on one of the cap plate and the connection socket, and coupling positioning grooves provided on the other of the cap plate and the connection socket to receive the protrusions.

Also, the length of the outer circumferential surface of the reinforcing band may be at least equal to the length of the threaded pipe, and the length of the outer circumferential surface of the connecting socket may be smaller than the length of the threaded pipe.

In the composite file according to the present invention, a PHC file is installed on the ground at the construction site, and then a steel pipe file is longitudinally connected to the upper part of the PHC file. The PHC file and the steel pipe By interconnecting the files, the work process can be performed easily and quickly, and the entire construction time can be shortened and the construction cost can be reduced.

1 is an exploded perspective view showing a connection structure of a compound file according to an embodiment of the present invention;
2 is an exploded cross-sectional view illustrating a connection structure of a composite file according to an embodiment of the present invention;
3 is a partially enlarged cross-sectional view showing a state in which a connection socket is attached to a steel pipe file in a composite file according to an embodiment of the present invention;
4 is a plan view of a cap plate installed on top of a PHC file of a composite file according to an embodiment of the present invention;
5 is a cross-sectional view illustrating a state before a steel pipe file is connected to a PHC file in a composite file according to an embodiment of the present invention.
FIG. 6 is a cross-sectional view showing a state before a screw coupling pipe coupled to a PHC file in a combined file according to an embodiment of the present invention is coupled to a steel pipe file; FIG.
FIG. 7 is a cross-sectional view showing a PHC file and a steel pipe file connected in a longitudinal direction using a screw coupling pipe in a composite file according to an embodiment of the present invention; FIG.

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

FIG. 1 is an exploded perspective view illustrating a connection structure of a composite file according to an embodiment of the present invention, and FIG. 2 is an exploded cross-sectional view illustrating a connection structure of a composite file according to an embodiment of the present invention. FIG. 3 is a partially enlarged cross-sectional view illustrating a state in which a connection socket is attached to a steel pipe file in a composite file according to an embodiment of the present invention. FIG. 4 is a cross- Fig. 2 is a plan view of a cap plate to be installed;

The composite file of the present invention can be formed by connecting a steel pipe file 200 to a PHC file 100 including a steel wire as shown in FIGS.

The steel pipe file 200 includes a hollow steel pipe body 202 having a structure supported at one end thereof and a socket plate 220 may be connected to the other end of the steel pipe body 202. Here, the outer diameter of the socket plate 220 may be provided at a diameter corresponding to the outer diameter of the steel pipe body 202.

The socket plate 220 may be connected to a connection socket 210 having an outer diameter smaller than the outer diameter of the steel pipe body 202 and having a threaded portion, specifically, a connection socket thread 216 formed on the outer circumference thereof.

Further, the end of the connection socket 210 may be formed with a flange 230 inwardly.

The PHC file 100 also includes a concrete body 102 having a hollow portion and a reinforcement band 110 inserted into the end of the concrete body 102 to prevent the end of the concrete body 102 from breaking .

The reinforcing bands 110 may be provided on both ends of the concrete body 102 to prevent breakage of both side portions of the concrete body 102.

One or more ring-shaped couplings 118 may be additionally provided within the reinforcement band 110 for rigid coupling of the reinforcement band 110 and the concrete body 102.

The reinforcing band 110 may be provided at an outer diameter corresponding to the connecting socket 210 of the steel pipe 200 and may be provided with a thread on the outer circumferential surface of the connecting socket 210, (116) may be formed.

In addition, the PHC file 100 may further include a cap plate 112 disposed to cover both side ends of the concrete body 102. Here, the cap plate 112 is provided to be in contact with the upper surface of the reinforcement band 110, and can be joined by welding or the like.

A plurality of latching grooves 113 may be formed in the cap plate 112 coupled to the PHC file 100.

A plurality of steel wires 120 may be inserted into the concrete body 102. The steel wire 120 may be inserted into the retaining grooves 113 of the cap plate 112 located at both ends of the concrete body 102, Can be fixed.

The latching grooves 113 formed in the cap plate 112 may be formed at regular intervals along the circumferential direction on the upper surface of the cap plate 112. The engaging groove 113 may be formed so as not to protrude above the cap plate 112 when the end of the steel wire 120 is fixed to the engaging groove 113.

The method for fastening the reinforcement band 110 and the cap plate 112 to the concrete body 102 can be applied in various ways. For example, a mold is provided in which the concrete is cast to form the concrete body 102 If the reinforcing band 110 is placed on the mold and the concrete is poured into the mold, the reinforcing band can be integrated with the concrete body while the concrete is cured.

The cap plate 112 may also be coupled together at this time. Of course, the method for fastening the reinforcing band 110 and the cap plate 112 is not limited to this, and a method of manufacturing the PHC pile 100 in which various types of reinforcing bands are provided can be applied, and welding, It is also possible to manufacture by the mechanical fastening method used.

In this embodiment, the steel pipe file 200 may be located on top of the PHC file 100, wherein the inner flange 218 of the connecting socket 210 is in close contact with the cap plate 112 of the PHC file 100 Can be supported.

The composite file in this embodiment is formed by integrally connecting the connector socket 210 and the reinforcement band 110 by a screw coupling pipe 300 which is interlocked with the connector socket 210 and the reinforcement band 110 in a state where the pipe pipe file 200 is positioned above the PHC file 100 Can be combined.

The screw coupling pipe 300 is threaded on the inner circumferential surface and is provided to be coupled to the reinforcing band thread 116 and moves along the reinforcing band thread 116 and the connecting socket thread 216, 200 and the PHC file 100 can be integrally combined.

The upper end of the threaded pipe 300 is fastened to the connection socket 210 and the lower end of the socket plate 220 is fastened A part of the load of the steel pipe body 202 can be divided and supported by the screw coupling pipe 300. As shown in FIG.

Meanwhile, the cap plate 112 may have a circular hole 111 corresponding to the hollow portion of the concrete body 102.

In addition, the flange formed on the inner side of the connection socket 210 may be provided with a latching step 219 to be inserted into the hole 111.

The steel pipe file 200 is formed by fitting the engagement step 219 formed in the flange of the connection socket 210 into the hole 111 of the cap plate 112 in the process of being positioned above the PHC file 100 An accurate seating position can be matched.

More preferably, a protrusion is formed on one of the cap plate 112 or the connection socket 210, and a coupling positioning groove on which the protrusion is fitted may be formed on the other side.

The steel pipe file 200 can be arranged such that the connecting socket thread 216 and the reinforcing band thread 116 are continuously placed in the coupling positioning groove in the process of being seated on the top of the PHC file 100 So that the threaded mating tube 300 is continuously moved along the connecting socket threads 216 and the reinforcing band threads 116 and can be simultaneously coupled to and coupled to the steel tube pile 200 and the PHC pile 100 .

Meanwhile, in the present embodiment, the length of the outer circumferential surface of the reinforcing band 110 may be at least equal to the length of the screw coupling pipe 300.

When the length of the outer circumferential surface of the reinforcing band 110 is shorter than the length of the screw coupling pipe 300, the screw coupling pipe 300 may protrude upward while being coupled to the reinforcing band 110. Therefore, the steel pipe file 200 can not be seated on the cap plate 112 of the PHC file 100, but is brought into contact with the screw coupling pipe 300, so that stable engagement is not achieved.

The length of the reinforcing band 110 should be equal to or longer than the length of the screw coupling pipe 300. When the screw coupling pipe 300 is coupled to the outer peripheral surface of the reinforcing band 110, It is necessary to prevent the steel pipe pile 200 from touching the screw coupling pipe 300 in the course of seating the steel pipe pile 200 in such a manner that it is lower than or equal to the upper height of the steel pipe pile 200.

Further, the length of the connection socket 210 may be smaller than the length of the screw coupling pipe 300.

The threaded coupling pipe 300 is coupled to the coupling socket 210 and the reinforcing band 110 at the same time and the pipe fitting 200 and the PHC pile 100 are coupled to each other. The length of the connection socket 210 may be smaller than the length of the screw coupling pipe 300 so that the connection socket 210 can be maintained in a state of being engaged with the reinforcement band 110 even when the socket plate 220 is in close contact with the lower end of the socket plate 220.

In this embodiment, the reinforcing band threads 116 formed on the outer circumferential surface of the reinforcing band 110 are preferably formed up to about the middle of the upper and lower lengths of the outer circumferential surface of the reinforcing band 110. This minimizes the formation of unnecessary screws, The coupling property can be improved by reducing the rotational load of the tube 300.

In the present embodiment, the steel tube bundle 200 is described as being integrally coupled to the PHC bundle 100 as the screw coupling tube 300 is coupled to the outer circumferential surface of the connection socket 210 provided at the lower end, When the outer diameter of the steel pipe body 202 of the pile 200 is formed to correspond to the outer diameter of the reinforcing band 110, the screw coupling pipe 300 is directly coupled to the outer circumferential surface of the steel pipe body 202, It is also possible to directly form the threads.

The process of constructing the compound file using the link structure of the compound file according to the present invention is as follows.

FIG. 5 is a cross-sectional view showing a state before a steel pipe file is connected to a PHC file in a composite file according to an embodiment of the present invention. FIG. 6 is a cross- Sectional view showing the state before the pipes are mutually coupled to the steel pipe file. FIG. 7 is a cross-sectional view showing a PHC file and a steel pipe file connected in the longitudinal direction by using a screw coupling pipe in a composite file according to an embodiment of the present invention.

5, the PHC file 100 and the steel pipe file 200 are prepared before the compound file is constructed. Then, the PHC file 100 is buried on the ground with horses.

The screw coupling pipe 300 is coupled to the outer circumferential surface of the reinforcing band 110 of the PHC file 100. At this time, the threaded coupling pipe 300 is helically engaged with the reinforcing band thread 116 provided on the outer peripheral surface of the reinforcing band 110. The upper end of the screw coupling pipe 300 is coupled to the upper surface of the reinforcing band 110 and the cap plate 112 without being protruded from the upper surface of the reinforcing band 110 .

When the embedding of the PHC file 100 is completed, the prepared steel pipe file 200 is loaded on the PHC file 100 as shown in FIG. The inner flange 218 of the connecting socket 210 of the steel pipe 200 is brought into contact with the cap plate 112 provided on the upper portion of the PHC file 100. At this time, the steel pipe file 200 is inserted into the hole 111 formed in the cap plate 112 of the PHC file 100 so that the engaging step 119 provided on the inner flange 118 of the connecting socket 210 is inserted into the steel pipe file It is possible to exactly match the seating position of the seat 200.

When the steel pipe file 200 is seated on the upper part of the PHC file 100, the screw coupling pipe 300 is rotated. 7, the screw coupling pipe 300 is moved along the reinforcing band screw thread 116 and the connection socket thread 216 to be simultaneously connected to the PHC file 100 and the steel pipe file 200, The PHC file 100 and the steel pipe file 200 are stably coupled.

As described above, in the composite file of the present invention, the PHC file 100 is installed on the ground in the construction site, and then the steel pipe file 200 is connected to the upper part of the PHC file 100 in the longitudinal direction. By connecting the PHC file 100 and the steel pipe file 200 with the secured screw coupling pipe 300, the work process can be performed easily and quickly, and the construction time can be shortened and the construction cost can be reduced. There is an effect that can be done.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. It will be understood that various modifications and changes may be made without departing from the scope of the appended claims.

100: PHC file 102: Concrete body
110: reinforcement band 111: hole
112: cap plate 113:
116: Reinforcing band thread 118: Binder
120: Steel wire 200: Steel pipe file
202: Steel pipe body 210: Connection socket
216: Connection socket thread 218: Flange
219: latching jaw 220: socket plate
300: screw coupling pipe

Claims

A socket plate joined to the other end of the steel pipe body and provided with an outer diameter smaller than an outer diameter of the steel pipe body so that a thread is formed on an outer circumferential surface of the socket plate; The end portion being a steel pipe file having an inwardly flanged connection socket;
A PHC file having a concrete body having a hollow portion and a step portion formed at one end thereof, and a reinforcing band inserted into the concrete body and provided with an outer diameter corresponding to the connection socket, And
A threaded pipe formed on the inner circumferential surface and coupled to the thread of the reinforcing band and moving along the thread of the reinforcing band and the thread of the connection socket and coupling the pipe tube with the PHC pile;
A compound file containing.

The method of claim 1, wherein the PHC file
A cap plate disposed to cover both side ends of the concrete body and having a plurality of latching grooves,
Further comprising a plurality of steel wires inserted into the concrete body and having both ends fixed to the engagement grooves of the cap plate located at both ends of the concrete body.

3. The method of claim 2,
A hole corresponding to the hollow portion of the concrete body is formed in the cap plate,
And a latching step formed on the flange formed on the inner side of the connecting socket to fit into the hole.

The method of claim 3,
A protrusion provided on one of the cap plate and the connection socket,
And a coupling positioning groove provided on the other of the cap plate or the connection socket to receive the projection.

5. The method according to any one of claims 1 to 4,
The length of the outer peripheral surface of the reinforcing band is formed to be at least equal to the length of the screw-
Wherein a length of an outer peripheral surface of the connection socket is formed to be smaller than a length of the screw coupling pipe.