KR20160001116U - Coulper of steel pipe pile for rotational intrusion and pullout - Google Patents

Abstract

The present invention relates to a rotating penetration and withdrawal coupler for a steel pipe file, which can be easily pulled out without being detached from the coupler coupling portion even when there is no part to be deformed or broken at the coupler side during the forward rotation penetration after the connection between steel pipe files, Lt; / RTI >
According to a preferred embodiment of the present invention, there is provided a coupler used for mutually connecting and rotatingly piercing upper and lower steel pipe files in a single shaft, the socket comprising: A socket plug detachably coupled to the socket; And a fixing bolt for fixing the coupling between the socket and the socket plug; The socket includes a socket body having a polygonal cross section on the outer circumferential surface, a socket coupling hole penetrating through the center of the socket body at each end face, a bolt head groove formed radially in the outer peripheral surface of the socket body, And a bolt fastening hole formed in the fastening protrusion of the bolt head groove and communicating with the socket fitting hole. The socket plug has a flange for joining an upper steel pipe having an outer peripheral face and a flange for joining an upper steel pipe, A screw boss which is protruded downward with the same cross section as the socket engaging hole and inserted into the socket engaging hole, a screw hole located on the outer surface of the engaging boss and aligned on the same straight line as the bolt fastening hole, And a grouting passage penetrating through the engaging boss at the center of the upper surface of the flange for joining It shall be.

Description

{Coulter of steel pipe pile for rotational intrusion and pullout}

The present invention relates to a coupler used for interconnecting steel pipe files used on the bases of buildings, bridges, harbors, and the like. Particularly, there is no part to be deformed or broken at the coupler side during rotation penetration after joining steel pipe files, And more particularly, to a rotary penetration and drawing coupler of a steel pipe pile which can be easily pulled out without being detached from a coupler coupling portion.

In general, foundation files are applied to the foundation of large structures, bridges, and river structures built on soft ground, and are also applied to earthworks, buoyancy anchor, foundation foundation, slope reinforcement. That is, the foundation file is struck to the ground and pressured to a certain depth, thereby playing a role of supporting structural stability and soil pressure against the ground of the construction building.

As a conventional method of installing such foundation files in the ground, there are a method of installing the files on the ground from the upper part and installing them on the ground by using a driver (file driver) on the desired ground, .

If the supporting layer is deeper, such as piers or alternating bases of civil engineering, building structures, and bridges, the steel pipe pile or concrete piles should be penetrated up to the support layer in order to fully support the load of the structure. The structure will be constructed.

Such a foundation file is to be produced with a certain standard length. When the support layer is deep, the foundation file should be connected vertically to penetrate the foundation file to the desired support layer depth.

In particular, two or more steel pipe files to be used as foundation files are assembled according to the depth of entry. Thus, a separate coupler is installed to interconnect the steel pipe files at the connections.

The structure of the coupler for connecting the conventional steel pipe files is as follows. A cylindrical sleeve is provided at the upper end of the lower steel pipe file, an upper steel pipe file is inserted into the inner diameter of the sleeve, And has a structure in which each nut is fastened by being pierced and assembled.

Therefore, when a steel pipe file is inserted, the following problems arise. First, since the outer diameter of the cylindrical sleeve is formed to be larger than the outer diameter of the steel tube pile, the resistance is received from the ground during penetration, which reduces the efficiency of penetration. Also, to assemble the bolts, a separate and cumbersome assembly operation is required to match the holes formed between the cylindrical sleeve and the upper steel pipe fins. Therefore, the assembly workability is deteriorated because a lot of delay time is required to connect the steel pipe files to the sleeve.

Korean Patent Registration No. 10-0803969 (Steel Pipe Rotating Apparatus) is proposed as a background technology of the present invention. This is because the steel pipe rotating device includes a steel pipe which is elongated in the longitudinal direction and which is rotatably embedded in the ground by an external force, a plurality of guide members protruding from the upper outer surface of the steel pipe, a rotating member mounted on the steel pipe filling device, And the connecting member is partly coupled to the outer surface of the steel pipe and has a guide groove into which a plurality of guide members are inserted.

Therefore, it is advantageous to prevent the noise during the steel pipe embedding and to reduce the generation of environmentally harmful substances by embedding the steel pipe while rotating it.

However, the background of the electron can only transmit the rotational force due to the engagement between the guide groove and the connecting member, and when it is difficult to meet the rock during the rotation penetration (when the steel pipe is drawn and the penetration at another position is required) There is a problem that the guide member is pulled out from the connecting member during rotation and pulling is difficult.

Another technique to be a background of the present invention is proposed in Korean Registered Patent No. 10-1119829 (a method of constructing a cast-in-place pile using a hollow coupler and a shear reinforcement).

In the latter background technology, the hollow coupler connects the steel pipe by a method such as a screw type and welding. In the case of the screw type, the coupling between the air hole coupler and the steel pipe is separated during reverse rotation, and the upper and lower steel pipes are separated There is a problem that it can not be applied to the rotational penetration method.

Korean Registered Patent No. 10-0803969 (Steel pipe rotating device) Korean Registered Patent No. 10-1119829 (Method of constructing a cast-in-place pile using a hollow coupler and a shear reinforcement)

The present invention relates to a rotating penetration and withdrawal coupler for a steel pipe file, which can be easily pulled out without being detached from the coupler coupling portion even when there is no part to be deformed or broken at the coupler side during the forward rotation penetration after the connection between steel pipe files, The present invention has been made in view of the above problems.

According to a suitable embodiment of the present invention,

The present invention relates to a coupler used to connect and rotatably connect upper and lower steel pipe pipes in one shaft,

A socket which is connected to the upper end of the lower steel pipe file;

A socket plug detachably coupled to the socket;

And a fixing bolt for fixing the coupling between the socket and the socket plug;

The socket includes:

A bolt head groove formed in a radial direction on the outer peripheral surface of the socket body to locate the head portion of the fixing bolt, a bolt head groove formed in the outer circumferential surface of the socket body, And a bolt fastening hole formed in the latching jaw and communicating with the socket coupling hole,

The socket plug includes:

A flange for joining an upper steel pipe having a polygonal cross section to an outer circumferential surface, a coupling boss projecting downwardly from the lower center of the lower face of the lower steel pipe joint flange and having the same cross section as the socket coupling hole, A screw hole positioned on the same straight line as the bolt fastening hole and to which the fixing bolt is screwed, and a grouting passage penetrating the coupling boss at the center of the upper surface of the flange for joining the upper steel pipe.

Further, the socket body has a lower steel pipe file assembly groove formed in a circular shape and having a predetermined depth to be fitted to the upper end of the lower steel pipe pile, and a socket side chamfer connection portion chamfered around the edge portion of the lower steel pipe pile assembly groove Is formed.

Further, the socket plug has, on its upper surface, an upper steel pipe file assembling groove formed in a circular shape having a predetermined depth to be fitted to the lower end of the upper steel pipe pile, and a plug side chamfering joint chamfered around the edge portion of the lower steel pipe pile mounting groove Is formed.

Further, the socket coupling hole and the coupling boss And has a cross-sectional structure of any one of triangular to octagonal cross-sections.

Further, the socket coupling hole and the coupling boss are further formed with opposing keyways and shear keys mutually fitted.

According to the present invention, the rotary penetration and pulling coupler of the steel pipe file is constituted by a socket and a socket plug to transmit the rotational force regardless of the rotating direction, and the fixing bolt is configured to prevent separation between the socket plug and the socket, The time fixing bolt does not receive the shearing force and has the advantage that there is no deformation or breakage on the coupler side.

Also, the socket plug of the coupler has a polygonal cross section, so that the rotational driving power of the rotating intrusion device can be efficiently transmitted.

Further, even in the reverse rotation drawing process, separation between the socket and the socket plug, which are the coupling parts of the coupler, is prevented, and drawing for removing the upper steel pipe pile is made easy.

Also, it is possible to separate and remove only the socket plug of the coupler during the drawing process, so that it is possible to transfer the reverse torque by using the remaining socket connected to the lower steel pipe after removing the upper steel pipe file. .

In addition, the coupler is free from any element protruding into the inside of the socket plug providing the grouting passage, and does not cause problems in the grouting injection.

The following drawings attached hereto are illustrative of preferred embodiments of the present invention and together with the detailed description of the invention serve to further understand the technical idea of the present invention, Shall not be construed as limiting.
1 is an exploded perspective view of a steel pipe file and a coupler according to an embodiment of the present invention;
2 is an exploded perspective view of a coupler according to an embodiment of the present invention;
3 is a sectional view of Fig. 2;
4 is an assembled sectional view of Fig.
FIGS. 5A to 5C are explanatory diagrams showing the basic construction of the steel pipe file in succession by applying the coupler of the present invention. FIG.
6 is an exploded perspective view of a steel pipe file and a coupler according to another embodiment of the present invention;

BRIEF DESCRIPTION OF THE DRAWINGS The above and other aspects of the present invention will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings in which: FIG.

As shown in Figs. 1 to 4, the coupler 10 of the present invention is used for vertically interconnecting the upper and lower steel pipe piles 1, 2 in a rotational manner. In the present embodiment, the present invention is applied to the coupling between two steel pipe files 1 and 2, but is not limited to the number of steel pipe files.

Here, the lower steel pipe pile 2 has at least one helical blade 2a and a grouting discharge hole 2b for smooth rotation penetration in a lower side constant section as shown in Fig.

The coupler 10 includes a socket 12 to be attached to the upper end of the lower steel pipe 2, a socket plug 14 to be detachably coupled to the socket 12, and a coupling between the socket 12 and the socket plug 14 And a fixing bolt 16 for fixing the bolt. In this embodiment, the socket 12 and the socket plug 14 are made of steel.

The socket 12 is provided with a socket body 121 having an outer peripheral surface and a polygonal cross section. The height H of the socket body 121 is formed to be higher than the height h of the coupling boss 142 of the socket plug 14. [ A socket coupling hole 122 is formed at the center of the socket body 121 so as to penetrate through the same polygonal cross section as the coupling boss 142 so that the coupling boss 142 of the socket plug 14 can be inserted freely. In the present embodiment, the coupling boss 142 and the socket coupling hole 122 are coupled with a predetermined inclination to facilitate initial insertion. A bolt head groove 123 formed radially on the outer circumferential surface of the socket body 121 and having a head portion of the fixing bolt 16 is formed on the engaging step 123a of the bolt head groove 123, And a bolt fastening hole 124 communicated with the bolt fastening hole 124.

The bolt head groove 123 is formed in the socket 12 so that the head portion of the fixing bolt 16 is fixed to the socket 12 in a state where the fixing bolt 16 fixes the socket plug 14, There is no obstacle to the rotation intrusion because it does not protrude outward. Further, after the fixing bolt 16 is installed, the tip end of the fixing bolt 16 does not enter the grouting passage 144 on the side of the socket plug 14, thereby causing no problem in grouting.

The socket body 121 has a lower steel pipe pile mounting groove 125 formed in a circular shape having a predetermined depth for fitting the upper end of the lower steel pipe pile 2 on the lower surface thereof, A chamfered socket side chamfered joint 126 may be further formed.

The socket plug 14 has a flange 141 for joining an upper steel pipe having a polygonal cross section to an outer circumferential surface and a flange 141 for joining the upper steel pipe and the flange 141, A coupling boss 142 to be inserted into and coupled to the coupling hole 122 and a screw hole 142 which is located on the outer surface of the coupling boss 142 and which is located on the same straight line as the bolt coupling hole 124 and into which the fixing bolt 16 is screwed 143), and a grouting passage (144) passing through the coupling boss (142) at the center of the upper surface of the upper steel pipe jointing flange (141).

The socket plug 14 is formed on the upper surface thereof with an upper steel pipe file fitting groove 145 formed in a circular shape having a predetermined depth to be fitted into the lower end of the upper steel pipe pile 1, And a plug-side chamfered joint 146 chamfered around the periphery may be further formed.

In the present invention, the socket coupling hole 122 and the coupling boss 142 have a cross-sectional structure of any of triangular to octagonal cross-sections. In this embodiment, the socket coupling hole 122 and the coupling boss 142 are formed to have a quadrangular cross-section.

And The joining process and the usage method of the upper and lower steel pipe files 1 and 2 to which the coupler 10 constructed in the same manner is applied will be explained through the construction process of the foundation file.

First, as shown in FIG. 5A, the socket 12 of the coupler 10 is installed on the upper end of the lower steel pipe tube 2.

This is accomplished by fitting the lower steel pipe fitting groove 125 of the socket 12 side to the upper end of the lower steel pipe pile 2 and then joining the same along the socket side chamber joint portion 126.

In this state, after the socket plug 14 is coupled to the socket 12 as shown in Figs. 4 and 5A, the socket plug 14 is fixed to the socket 12 with the fixing bolt 16, and the coupler 10 is rotated The lower steel pipe pile 2 is first rotationally inserted into the required position of the ground by connecting to the rotation drive part 5 of the intrusion equipment (auger), and at the same time, the grouting material is injected through the grouting passage 144, Conduct.

At this time, the coupler 10 is configured such that the socket 12 and the socket plug 14 have the same cross-sectional shape and are engaged with the rotation driving portion 5 to transmit power.

The grouting is temporarily stopped and the fixing bolt 16 is released and the rotary drive part 5 is separated from the coupler 10 and then the upper steel pipe pile 1 is inserted into the lower steel pipe pile 1 2).

The socket plug 14 separated from the socket 12 is connected to the lower end of the upper steel pipe tube 1.

This is accomplished by fitting the upper steel pipe groove 145 of the socket plug 14 to the lower end of the upper steel pipe pile 1 and then joining the welded joints. Welding may be accomplished through the plug-side chamber joint 146 to improve welding.

The socket plug 14 is inserted into the socket 12 in a state where the upper steel pipe tube 1 is positioned above the upper steel pipe tube 2 so as to be on the vertical line with the lower steel pipe tube 2, And is coupled to the ball 122. At this time, the engaging boss 142 is inserted into the socket-engaging hole 122 to guide the upper steel pipe pile 1 and the lower steel pipe pile 2 in a vertical line.

Thus, by the combination of the socket plug 14 and the socket 12, the rotational force of the upper steel pipe pile 1 can be transmitted to the lower steel pipe pile 2 in the same manner.

Then, an additional socket 12 of the same structure is welded to the upper end of the upper steel pipe tube 1 in the same manner as described above, and then the additional socket plug 14 is coupled to the socket 12, The coupler 10 connected to the rotation driving unit 5 is rotationally inserted into the upper steel pipe pile 1 as shown in FIG. Of course, the grouting operation is performed through the grouting passages of the additional coupler 10 as described above.

In this intrusion process, if the tip of the lower steel pipe pipe 2 meets the rock, the penetration of the file becomes difficult, and it is necessary to remove the intruded file again.

At this time, when the rotation drive portion 5 of the tube rotation entrance ratio (auger) is rotated in the reverse direction, the rotational force is directly transmitted by the coupler 10 to maintain the engagement between the upper steel pipe pile 1 and the lower steel pipe pile 2. [ Upward drawing is performed. At this time, the separation between the socket 12 and the socket plug 14 is not caused by the fixing bolt 16.

Therefore, the coupler 10 is capable of pulling upward even if the reverse rotation is performed in the process of rotating the pipe of the steel pipe. At this time, as shown in FIG. 5A, first, the lower steel pipe 2 is first rotationally inserted, and then the socket plug 14 is coupled to the socket 12 to perform rotational penetration and grouting of the upper steel pipe 1.

When the lower steel pipe 2 is secondarily penetrated to a required position of the ground and the rotation driving part 5 is separated from the upper end side coupler 10 of the upper steel pipe pile 1, Grouting can be performed through the grouting passages 144 of the first and second plates 12 and 12.

As described above, the coupler 10 of the present invention can be used to quickly connect the neighboring steel pipe files 1 and 2 and to receive rotational force from the rotary drive unit 5 through the socket 12 efficiently . Further, when the steel pipe file is rotated in the reverse direction, the socket bolt 16 is retained in the socket 12 without being separated by the fixing bolt 16 during the reverse rotation, so that the drawing can be performed easily, can do.

In addition, the coupler 10 does not have any elements protruding into the socket plug 14 providing the grouting passages, and does not cause problems in the grouting injection.

6, the socket 12 and the socket plug 14 may have a rectangular shape.

In another embodiment, the receptacle coupling hole 122 and the coupling boss 142 may be formed with opposite key grooves 122a, 122a and shear keys 142a, 142a. When the keyways 122a and 122a and the shear keys 142a and 142a are formed, the engaging force between the socket 12 and the socket plug 14 is improved and the rotation efficiency is improved.

Although the present invention has been described in detail with reference to the disclosed embodiments, those skilled in the art will be able to make various modifications and alterations without departing from the technical idea of the present invention will be. This invention is not limited by these variations and modifications, but is limited only by the claims appended hereto.

10: Coupler
12: Socket
121: socket body
122: socket coupling ball
123: Bolt head groove
124: Bolt tightening ball
14: Socket plug
141: Flange for upper steel pipe joint
142: engaging boss
143: Screw hole
144: Grouting passage

Claims (5)

A coupler (10) used for connecting and rotatingly connecting upper and lower steel pipe pipes (1, 2) in one shaft,
A socket (12) joined to the upper end of the lower steel pipe tube (2);
A socket plug (14) detachably coupled to the socket (12);
And at least one fixing bolt (16) for fixing the coupling between the socket (12) and the socket plug (14);
The socket (12)
A socket body 121 having a polygonal cross section on the outer circumferential surface, a socket coupling hole 122 penetrating through the center of the socket body 121 at each end face, A bolt head groove 123 in which the head of the bolt head groove 123 is located and a bolt fastening hole 124 formed in the fastening protrusion of the bolt head groove 123 and communicated with the socket coupling hole 122,
The socket plug (14)
A flange 141 for joining an upper steel pipe having a polygonal cross section on the outer circumferential surface and a flange 141 for joining the upper steel pipe joint flange 141 and the upper steel pipe joint flange 141, A screw hole 143 in which the fixing bolt 16 is screwed to the outer surface of the coupling boss 142 and positioned on the same straight line as the bolt fastening hole 124, And a grouting passage (144) passing through the engaging boss (142) at the center of the upper surface of the joining flange (141). The method according to claim 1,
The socket body 121 includes a lower steel pipe pile assembly groove 125 formed in a circular shape having a predetermined depth for fitting the upper end of the lower steel pipe pile 2 on the lower surface thereof, And a socket-side chamfered joint (126) chamfered in a circumferential direction. The method according to claim 1,
The socket plug 14 is formed on the upper surface thereof with an upper steel pipe file assembly groove 145 formed in a circular shape having a predetermined depth to be fitted to the lower end of the upper steel pipe pile 1, And a plug-side chamfered joint portion (146) chamfered around the plug-side chamfered portion (146). The method according to claim 1,
The socket coupling hole 122 and the coupling boss 142 Wherein the coupler has a cross-sectional structure of any one of triangular to octagonal cross-sections. The method according to claim 1,
Characterized in that the socket coupling hole (122) and the coupling boss (142) are further formed with opposing key grooves (122a, 122a) and shear keys (142a, 142a) Coupler.

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