KR102343201B1 - Connection structure of helical pile and extension pile - Google Patents

Abstract

The present invention relates to the connection structure of a helical pile and an extension pile, which makes the connection and disassembly of the helical pile and the extension pile easier. To this end, the connection structure of a helical pile and an extension pile includes a wing portion (11) having a spiral shape so that an extension pile (20) of a length can be attached and detached from an upper end portion of a helical pile fixed to the outer circumferential surface. A guide sleeve (15) is integrally welded and fixed to an upper portion of the helical pile (10) so that the insertion of the extension pile (20) can be guided. Fitting grooves (12, 22) and fitting protrusions (13, 23) are provided in symmetrical form on both sides of connecting portions of the helical pile (10) and the extension pile (20) to be mutually coupled to each other. Corresponding end portions where the helical pile (10) and the extension pile (20) are mutually connected have flat guide surfaces (14, 24) formed thereon so that both the fitting protrusions (13, 23) are smoothly fitted and guided toward the fitting grooves (12, 22) on the opposite side by a rotation method. The guide sleeve (15) and the extension pile (20) have pin fastening holes (15a, 20a) formed therethrough in positions corresponding to each other to enable fastening of fixing pins (16).

Description

Connection structure of helical pile and extension pile

The present invention relates to a helical pile, and more particularly, to a connection structure and a connection method between a helical pile and an extension pile having an improved structure so that the connection between the helical pile penetrating into the soft ground and the extension pile can be made more effectively will be.

In general, when it is necessary to improve the ground, such as soft ground, when constructing a building structure, the foundation work of driving piles or improving the ground is preceded in order to prevent ground subsidence.

On the other hand, there are various types of piles constructed on soft ground depending on the shape and use, but in particular, using large equipment such as cranes and fork cranes, a drilling hole of a predetermined depth is formed up to the support layer, and then a hollow wall protection casing is installed and the Helical piles are used to form cast-in-place piles by performing grouting.

In a typical helical pile, spiral blades are integrally welded, and the extension pile is connected to the upper end for length extension.

1 is a view showing the connection structure of the helical pile 10 and the extension pile 20 according to an example of the related art, and a female screw is machined on the inner circumferential surface of the helical pile 10 integrally provided with a helical blade 11. The connected part 1 is provided, and the screw tab 2 in the form of a male screw is machined at the front end of the extension pile 20 corresponding thereto, so that a screw fastening method is connected to each other.

However, in the screw fastening type helical pile connection structure described above, there is a problem in that the product cost increases due to the processing of the screw taps on both sides of the mutual connection portion, and the production cost accordingly increases.

In addition, in the prior art of FIG. 2 , a technique for fastening by fastening pins 3 by forming pin fastening holes 4 and 5 respectively on both sides of the connection part of the helical pile 10 and the extension pile 20 is proposed. have.

However, in the above-described pin fastening method structure, breakage or deformation of the fastening pin 3 occurs due to the shear force according to the rotation and press-fitting load of the equipment is concentrated on the fastening pin 3, and also in the field, both side pin fastening holes ( 4,5), there was a problem in that the worker fastens the fastening pin 3 to the pin fastening hole 4, 5, or difficulty in disassembling the work, along with the difficulty in accurately matching.

Republic of Korea Patent Registration No. 1852826 (Registered on April 23, 2018) Korean Patent Registration No. 2090305 (Registered on March 11, 2020)

The present invention has been proposed to improve the problems in the prior art, and by providing an improved structure in which the shear bearing capacity can be improved while the connection operation of the helical pile and the extension pile is made more easily, the production cost of the product It aims to reduce the cost and improve work safety and efficiency.

In the present invention for achieving the above object, in the connection structure of the helical pile and the extension file, the extension file of a certain length is detachable from the upper end of the helical pile fixed to the outer circumferential surface by the wing portion having a spiral shape, A guide sleeve is integrally welded to the upper portion so that the insertion of the extension file can be guided; Fitting grooves and fitting protrusions are provided in a symmetrical form on both sides of the connection portion of the helical pile and the extension pile to enable coupling in a mutual fitting form; A flat guide surface forming a flat surface is formed at the corresponding end where the helical pile and the extension file are interconnected, so that both fitting protrusions can be smoothly inserted into the opposite fitting grooves by a rotation method; The guide sleeve and the extension file are characterized in that pin fastening holes are respectively formed through corresponding positions to enable fastening of the fixing pins.

According to the present invention, the connection structure of the helical pile and the extension pile can be made by a rotation connection method using a guide sleeve, so that mutual fastening and disassembling work can be easily made, and stable vertical and rotational load transmission can be made. It shows the effect of improving work efficiency.

In particular, the shear bearing capacity at the connection part can be improved, so that the ground penetration efficiency of the helical pile is improved, the pile raising operation is stably performed, and the production cost of the product is reduced compared to the conventional screw tap processing method.

1 is a structural diagram of a conventional screw connection type helical pile connection.
Figure 2 is a structure diagram of a conventional pin connection type helical pile connection.
Figure 3 is a schematic perspective view of the entire separated state including the extension pile on the top of the helical pile in the present invention.
Figure 4 is a perspective view of the parts separated state of the extension file and the auger connector according to an embodiment of the present invention.
Figure 5 is a state diagram in which the guide sleeve is fixed to the upper end of the extension pile in the present invention.
6 to 8 is a state diagram of the fastening process of the extension file and the auger connector in the present invention.
Figure 9 is a perspective view of the state in which the auger connector is fastened to the upper part of the extension pile of the present invention.
Figure 10 is a side view of the state in which the auger connector is fastened to the upper part of the extension pile of the present invention.
11 is a perspective view of the parts separated state of the extension pile and the helical pile according to an embodiment of the present invention.
12 is a state diagram in which the guide sleeve is welded and fixed to the upper end of the helical pile in the present invention.
13 to 15 is a state diagram of the fastening process of the extension pile and the helical pile in the present invention.
16 is a perspective view of a state in which the helical pile is fastened to the lower part of the extension pile of the present invention.
Figure 17 is a side view of the state in which the helical pile is fastened to the lower part of the extension pile of the present invention.
18 to 20 is a state diagram of a fastening process when an extension file and a helical pile connection part inclined guide surface are applied according to another embodiment of the present invention.
21 is a state diagram when an extension file and auger connector connection part inclined guide surface are applied according to another embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Embodiments of the present invention may be modified in various forms, and the scope of the present invention should not be construed as being limited to the embodiments described in detail below. This embodiment is provided to more completely explain the present invention to those of ordinary skill in the art.

Accordingly, the shape of the components expressed in the drawings may be exaggerated to emphasize a clearer description. It should be noted that the same configuration in each drawing is sometimes illustrated with the same reference numerals. In addition, detailed descriptions of functions and configurations of known technologies that may unnecessarily obscure the gist of the present invention may be omitted.

First, a connection structure of a helical pile and an extension pile according to an embodiment of the present invention will be described with reference to FIGS. 3 to 17 .

In this embodiment, as shown in FIG. 3, the extension pile 20 of a certain length is connected to the upper part of the helical pile 10 fixed to the outer circumferential surface by forming the wing part 11 in a spiral shape, and the extension pile 20 ) at the upper portion of the auger 40 and the connection of the auger connector 30 for connection is made.

Among them, looking at the connection structure of the extension pile 20 and the auger connector 30 through FIGS. 4 to 10 , the auger connector 30 for connection with the auger 40 is connected to the upper part of the extension pile 20 . , The upper end of the extension pile 20 and the corresponding auger connector 30 are provided with fitting grooves 22', 32 and fitting protrusions 23', 33 on both sides in a symmetrical form so that they can be coupled in a mutual fitting form. The auger connector 30 has a guide protrusion 31 that can be inserted into the extension file 20 is configured to protrude at a certain height, and the lower end of the guide protrusion 31 is inserted into the extension file 20. A tapered portion 31a is formed to facilitate ease, and a guide sleeve 25 for guiding the auger connector 30 is welded and fixed to the upper end of the extension pile 20 , the auger connector 20 and the guide sleeve 25 ), pin fastening holes (25a, 30a) are formed through each to enable fastening of the fixing pin (26).

At this time, at the corresponding end at which the extension file 20 and the auger connector 30 are interconnected, both side fitting protrusions 23 ′ and 33 are smoothly inserted into the opposite side fitting grooves 22 ′ and 32 by a rotation method. It can be seen that the guide surfaces 24' and 34 in the form of a flat surface are formed.

On the other hand, looking at the connection structure of the helical pile 10 and the extension file 20 in the present invention through FIGS. 11 to 17 , the insertion of the extension file 20 is guided in the upper part of the helical pile 10 . The sleeve 15 is integrally welded and fixed, and at the connection portion of the helical pile 10 and the extension pile 20, fitting grooves 12 and 22 and fitting protrusions 13 and 23 are provided to enable coupling in a mutual fitting form. are provided in a symmetrical form on both sides, respectively, and at the corresponding ends at which the helical pile 10 and the extension pile 20 are interconnected, both sides fitting protrusions 13 and 23 are provided with the opposite side fitting grooves 12 and 22 by a rotation method. ), flat guide surfaces 14 and 24 forming a flat surface are formed so as to be smoothly inserted into the guide, and pin fastening holes are formed on the guide sleeve 15 and the extension file 20 to enable the fastening of the fixing pin 16 . (15a, 20a) are formed through each of the positions corresponding to each other.

In particular, the positions of the pin fastening holes 15a and 20a respectively formed in the guide sleeve 15 and the extension pile 20 at the positions where the fitting grooves 12 and 22 and the fitting protrusions 13 and 23 are fastened coincide with each other. The fitting grooves 12 and 22, the fitting protrusions 13 and 23, the flat guide surfaces 14 and 24, and the pin fastening holes 15a and 20a are formed by laser processing so as to be possible.

At this time, the fitting groove 12 and the fitting protrusion 13 formed in the helical pile 10 are inserted into the inner circumferential surface of the guide sleeve 16 to a certain depth as shown in FIG. 13 when the guide sleeve 16 is fixed by welding. will achieve

Let's take a look at the effect of the connection process of the present invention helical pile 10 and the extension pile 20 constituting such a configuration.

First, in the initial stage of construction, in a state in which the upper end of the helical pile 10 erected vertically on the ground is connected to the jig of the fork crane head, the construction of the helical pile 10 is made to a certain depth in the ground according to the transmission of rotational force.

After that, the extension pile 20 is connected after separating the jig from the upper end of the helical pile 10 exposed to the ground. The connection between the helical pile 10 and the extension file 20 can be made as shown in FIGS. 13 to 15 while the lower end of the extension file 20 is inserted into the guide sleeve 15 located there.

That is, at this time, the fitting protrusions 13 and 23 provided in the helical pile 10 and the extension pile 20 inside the guide sleeve 15 are seated on the flat guide surfaces 14 and 24 on both sides, respectively, as shown in FIG. 14 . When the extension file 20 is gradually rotated to one side, the fitting protrusions 13 and 23 are gently guided along both sides of the flat guide surfaces 14 and 24, and the fitting protrusions as in FIG. 15 ( 13 and 23) are fitted into the fitting grooves 12 and 22 to form a connection state according to mutual meshing.

In such a meshing connection state, the guide sleeve 15 and the pin fastening holes 15a and 20a respectively formed in the extension pile 20 achieve a matching state, so that the helical pile is prevented from being separated through the fastening of the fixing pin 16 . A stable connection state between (10) and the extension file (20) can be maintained.

In particular, in the state in which the fitting protrusions 13 and 23 are engaged with the fitting grooves 12 and 22 as described above, the rotational and vertical loads transmitted to the lower helical pile 10 through the upper extension pile 20 are stable. It can be seen that it can be transmitted to

In this way, the connection operation of the auger connector 30 for connection with the auger 40 is continuously performed on the upper part of the extension pile 20 where the connection operation of the helical pile 10 is completed as in FIGS. .

That is, at this time, the fitting protrusions 23' and 33 provided in the extension pile 20 and the auger connector 30 inside the guide sleeve 25 are flat guide surfaces 24' and 34 on both sides, respectively, as in FIG. 14 . When the auger connector 30 is slowly rotated to one side, each fitting protrusion 23 ', 33 is gently guided along the flat guide surfaces 24 ' and 34 on both sides, as shown in FIG. Similarly, the fitting protrusions 23' and 33 are fitted into the fitting grooves 22' and 32 to form a connection state according to mutual meshing.

In such a meshing connection state, the guide sleeve 25 and the pin fastening holes 25a and 30a respectively formed in the auger connector 30 are in a matched state, so that separation is prevented through the fastening of the fixing pin 26 , the middle extension file (20) and a stable connection state of the auger connector 30 can be maintained.

In particular, in the lower part of the auger connector 30 in the lowering process for the connection of the auger connector 30, the guide protrusion 31 with the tapered part 31a has a protruding structure, so the insertion guide into the extension file 20 is can be done easily.

On the other hand, when it is desired to separate the extension pile 20 connected as described above from the helical pile 10, in the reverse order to the above, the fixing pin 16 is disassembled from the pin fastening holes 15a, 20a and then extended By simply rotating the pile 20 in the opposite direction, the fitting protrusions 13 and 23 are easily separated from the fitting grooves 12 and 22, so that a quick separation operation is possible.

Therefore, the present invention shows the effect of improving the working efficiency by making it easy to fasten and disassemble between the lower helical pile and the upper auger connector based on the extension pile and to transmit stable vertical and rotational loads. .

In particular, the shear bearing capacity at the connection part can be improved, so that the ground penetration efficiency of the helical pile is improved, the pile raising operation is stably performed, and the production cost of the product is reduced compared to the conventional screw tap processing method.

Meanwhile, FIGS. 18 to 21 show a configuration according to another embodiment of the present invention, and at the corresponding ends at which the helical pile 10 and the extension pile 20 are interconnected, both sides fitting protrusions 13, 23) is formed with inclined guide surfaces 14a and 24a forming an inclined surface of a certain angle so that the opposite side fitting grooves 12 and 22 can be smoothly inserted.

In addition, it can be seen that the guide surfaces 24 ′ and 34 formed at the corresponding ends where the extension pile 20 and the auger connector 30 are interconnected form an inclined shape at a predetermined angle.

When this configuration is achieved, the inclined guide surfaces 14a and 24a and the inclined guide surfaces 24 ', 34 during the connection operation of the extension pile 20 and the auger connector 30 in the upper and lower portions of the helical pile 10, respectively. It can be seen that the fastening can be made in the cam method by the structure, so that more efficient fastening work is performed and the fastening state can be stably maintained.

In particular, as the shear bearing capacity at the connection part can be further improved, the ground penetration efficiency of the helical pile is improved, the pile raising operation is performed stably, and the production cost of the pile is reduced compared to the conventional screw tap processing method. .

And, although specific embodiments of the present invention have been described and illustrated above, it is obvious that the helical pile extension structure of the present invention can be implemented with various modifications by those skilled in the art.

For example, in the above embodiment, the state in which the fitting groove and the fitting protrusion structure are composed of two has been described and illustrated, but the configuration of the connecting portion can be configured as three or four as needed.

However, such modified embodiments should not be individually understood from the spirit or scope of the present invention, and such modified embodiments should be included within the appended claims of the present invention.

10: helical pile 11: wing part
12,22: Fitting groove 13,23: Fitting protrusion
14,24: flat guide surface 14a, 24a: inclined guide surface
15,25: guide sleeve 15a, 20a, 25a, 30a: pin fastener
16,26: fixing pin 20: extension file
30: auger connector 31: guide protrusion
31a: tapered part 32: connecting flange
40 : Auger

Claims (7)

In the connection structure of the helical pile and the extension pile, the extension pile 20 of a certain length is detachable from the upper end of the helical pile 10 fixed to the outer circumferential surface by forming the wing part 11 in a spiral shape,
A guide sleeve 15 is integrally welded and fixed to the upper portion of the helical pile 10 so that the insertion of the extension pile 20 can be guided;
Fitting grooves 12 and 22 and fitting protrusions 13 and 23 are provided in a symmetrical form on both sides of the connecting portion of the helical pile 10 and the extension pile 20 so that they can be coupled to each other in a fitting form;
At the corresponding end where the helical pile 10 and the extension pile 20 are mutually connected, the fitting protrusions 13 and 23 on both sides are flat so that they can be smoothly inserted into the fitting grooves 12 and 22 on the opposite side by a rotation method. flat guide surfaces 14 and 24 are formed;
In the guide sleeve 15 and the extension pile 20, pin fastening holes 15a and 20a are respectively formed through corresponding positions to enable fastening of the fixing pin 16;
The auger connector 30 for connection with the auger 40 is connected to the upper part of the extension pile 20, and the upper part of the extension pile 20 and the auger connector 30 corresponding thereto can be coupled in a mutually fitting form. The fitting grooves 22', 32 and fitting protrusions 23' and 33 are provided in a symmetrical shape on both sides, respectively, and the auger connector 30 has a guide protrusion 31 that can be inserted into the extension pile 20. is configured to protrude at a certain height, and a tapered portion 31a is formed at the lower end of the guide protrusion 31 to facilitate insertion into the extension pile 20, and an auger connector 30 at the upper end of the extension file 20 ), a guide sleeve 25 for guiding is fixed by welding, and pin fastening holes 25a and 30a are formed through the auger connector 20 and guide sleeve 25 to enable fastening of the fixing pin 26 , respectively. The connection structure of the helical pile and the extension pile, characterized in that. The method according to claim 1,
The positions of the pin fastening holes 15a and 20a respectively formed in the guide sleeve 15 and the extension pile 20 at the positions where the fitting grooves 12 and 22 and the fitting protrusions 13 and 23 are fastened may coincide with each other. Helical file and extension file, characterized in that the fitting grooves 12, 22, fitting protrusions 13, 23, flat guide surfaces 14, 24 and pin fastening holes 15a, 20a are formed by laser processing so that of the connection structure. In the connection structure of the helical pile and the extension pile, the extension pile 20 of a certain length is detachable from the upper end of the helical pile 10 fixed to the outer circumferential surface by forming the wing part 11 in a spiral shape,
A guide sleeve 15 is integrally welded and fixed to the upper portion of the helical pile 10 so that the insertion of the extension pile 20 can be guided;
Fitting grooves 12 and 22 and fitting protrusions 13 and 23 are provided in a symmetrical form on both sides of the connecting portion of the helical pile 10 and the extension pile 20 so that they can be coupled to each other in a fitting form;
At the corresponding ends where the helical pile 10 and the extension pile 20 are mutually connected, the fitting protrusions 13 and 23 on both sides are smoothly inserted into the fitting grooves 12 and 22 on the opposite side by a rotation method. inclined guide surfaces 14a and 24a constituting an angled inclined plane are formed;
Pin fastening holes 15a and 20a are respectively formed through the guide sleeve 15 and the extension pile 20 to enable fastening of the fixing pin 16;
The auger connector 30 for connection with the auger 40 is connected to the upper part of the extension pile 20, and the upper part of the extension pile 20 and the auger connector 30 corresponding thereto can be coupled in a mutually fitting form. The fitting grooves 22', 32 and fitting protrusions 23' and 33 are provided in a symmetrical shape on both sides, respectively, and the auger connector 30 has a guide protrusion 31 that can be inserted into the extension pile 20. is configured to protrude at a certain height, and a tapered portion 31a is formed at the lower end of the guide protrusion 31 to facilitate insertion into the extension pile 20, and an auger connector 30 at the upper end of the extension file 20 ), a guide sleeve 25 for guiding is fixed by welding, and pin fastening holes 25a and 30a are formed through the auger connector 20 and guide sleeve 25 to enable fastening of the fixing pin 26 , respectively. The connection structure of the helical pile and the extension pile, characterized in that. delete delete 4. The method according to claim 3,
At the corresponding end at which the extension file 20 and the auger connector 30 are interconnected, the fitting protrusions 23' and 33 on both sides can be smoothly inserted into the fitting grooves 22' and 32 on the opposite side by a rotation method. The connection structure of the helical pile and the extension pile, characterized in that the guide surfaces (24', 34) are formed so as to be there. 7. The method of claim 6,
The guide surface (24', 34) is a connection structure of a helical pile and an extension pile, characterized in that provided in a flat shape or an inclined shape of a certain angle.

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