KR101683613B1 - Composite Pile with PHC Pile and Steel Tubular Pile by Connecting Apparatus - Google Patents

Composite Pile with PHC Pile and Steel Tubular Pile by Connecting Apparatus Download PDF

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Publication number
KR101683613B1
KR101683613B1 KR1020150084192A KR20150084192A KR101683613B1 KR 101683613 B1 KR101683613 B1 KR 101683613B1 KR 1020150084192 A KR1020150084192 A KR 1020150084192A KR 20150084192 A KR20150084192 A KR 20150084192A KR 101683613 B1 KR101683613 B1 KR 101683613B1
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South Korea
Prior art keywords
steel pipe
pipe pile
bolt
pile
plate
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KR1020150084192A
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Korean (ko)
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KR20150075404A (en
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오성남
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(주)스마텍엔지니어링
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Publication of KR20150075404A publication Critical patent/KR20150075404A/en
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/24Prefabricated piles
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/24Prefabricated piles
    • E02D5/28Prefabricated piles made of steel or other metals
    • E02D5/285Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22Piles
    • E02D5/58Prestressed concrete piles

Abstract

The present invention can accurately and easily perform a centering operation in which a center of a PHC pile and a center of a steel pipe pile are aligned with each other by positioning a steel pipe pile on a lower PHC pile and integrating them with each other to form a composite pile, A composite pile having a structure in which a PHC pile and a steel pipe pile are integrally formed by using a joining connection to prevent movement in a lateral direction by a clearance and further a solid integration with a concrete foundation can be achieved, "

Description

(PHC pile and steel tubular pile by Connecting Apparatus) with PHC pile-steel pipe pile integrated by PHC pile-to-steel pipe pile joining connecting joint which enables lateral clearance suppression and easy centering work.

The present invention relates to a composite pile made up of an integral combination of a hollow prestressed concrete pile (hereinafter referred to as "PHC pile") and a steel pipe pile, and a PHC pile and a steel pipe pile The centering of the PHC pile and the center of the steel pipe pile in the formation of the composite pile by positioning the steel pipe pile on the lower PHC pile and integrating them with each other can be accurately and easily carried out , The PHC pile and the steel pipe pile are integrally formed by using a joint connecting the steel pipe to prevent the steel pipe from moving in the transverse direction due to the clearance, and furthermore, it is possible to achieve a solid integration with the concrete base Further, "composite pile" Quot; connecting joints that join PHC piles and steel pipe piles "to make the bank.

When the PHC pile is placed on the PHC pile, the centering work of the steel pipe pile is made to match the center of the PHC pile in accordance with the design, in order to integrate the lower PHC pile and the upper steel pile. A technique developed so that it can be easily performed is disclosed in Korean Patent No. 10-1116389, and the details thereof are shown in FIG. 1 and FIG.

As shown in FIG. 1, in the prior art, at the upper end of PHC pile 10, a joint connection 1 formed of a bottom plate 2 and a vertical plate 3 is integrally connected. So that the stone substrate 4 is formed on the entire circumference. The steel pipe pile 20 is sandwiched between the vertical plate 3 and the stone substrate 4 so that the bolt member 25 penetrates the vertical plate 3, the steel pipe pile 20, and the stone substrate 4 sequentially After that, it is screwed and fixed to the screw that is formed on the vertical plate and the stone substrate.

It is most ideal that the distance between the vertical plate 3 and the stone substrate 4 is perfectly matched with the thickness of the steel pipe pile 20 as shown in FIGS. 1 and 2 in the above-described conventional technique. In this case, The distance between the vertical plate 3 and the stone substrate 4 is set to be larger than the thickness of the steel pipe pile 20 at the actual site because the steel plate 20 is not easily inserted between the vertical plate 3 and the stone substrate 4. [ It is a fact that it makes big. When the gap between the vertical plate 3 and the stone substrate 4 is larger than the thickness of the steel pipe pile 20 in this way, the gap between the steel pipe pile 20, the vertical plate 3 and the stone substrate 4, The steel pipe pile 20 is displaced in the lateral direction.

Since the steel pipe pile 20 is subjected to a large compressive load, if a small lateral displacement occurs, a large bending moment is applied to the steel pipe pile 20, so that the steel pipe pile 20 is structurally very unstable, 20 and the joint connector 1 may be broken.

1 and 2, the bolt member 25 sequentially passes through the vertical plate 3, the steel pipe pile 20, and the stone substrate 4 in the prior art, It is very difficult to process the through hole in the form of a screw hole capable of being screwed into the steel pipe 25 into the steel pipe pile 20. Particularly when the bolt member 25 is inserted into the vertical plate 3, the steel pipe pile 20, It is furthermore difficult to form through-holes with a threaded portion of a uniform shape in each of the vertical plate 3, the steel pipe pile 20,

Therefore, when forming the through hole in the steel pipe pile 20 in the field, it is not a screw hole in which the bolt member 25 can be screwed, but a through hole that the bolt member 25 simply passes through, ), Which are used in the present invention. In such a situation, if a clearance exists between the steel pipe pile 20, the vertical plate 3 and the stone substrate 4, the steel pipe pile 20 can be moved in the lateral direction without any limitation, The lateral displacement of the steel pipe pile 20 due to the clearance of the steel pipe 20, and consequently the occurrence of the structural instability, remains unresolved.

Meanwhile, in constructing the structure on the steel pipe pile 20, the steel pipe pile 20 is embedded in the concrete foundation C and supports the compressive force transmitted from the upper structure through the concrete foundation C. However, in the state where the steel pipe pile 20 is embedded in the concrete, the compressive force is supported only by the area corresponding to the thickness of the head portion of the steel pipe pile 20, and the risk of punching failure in the concrete foundation C is very high. Therefore, when combining the steel pipe pile 20 and the concrete foundation C, it is necessary to eliminate such a risk.

Korean Registered Patent No. 10-1116389 (issued on February 22, 2012).

The present invention has been developed in order to overcome the problems and limitations of the prior art as described above. Specifically, the PHC pile is disposed at the lower part, the steel pipe pile is positioned at the upper part of the PHC pile, and the joint connector is disposed between the PHC pile and the steel pipe pile In order to prevent the lateral displacement of the steel pipe pile due to the lateral displacement of the steel pipe pile, the increase of the operational bending moment caused by the occurrence of the structural instability and the occurrence of the fracture .

In addition, the present invention supports the compressive force transmitted from the upper structure through the concrete foundation by supporting the compressive force only by the area corresponding to the thickness of the steel pipe pile head, so that the punching failure of the concrete foundation So that it is possible to effectively prevent the above-mentioned problems.

In order to achieve the above object, according to the present invention, there is provided a composite pile integrated with a lower PHC pile and an upper steel pipe pile by a joint connector, wherein the joint connector comprises a bottom plate of a circular- Wherein a plurality of second bolt holes are formed through the protruding plate, and a first bolt hole is formed in the vertical plate at a position facing a part of the second bolt hole, An opening is formed in the vertical plate at the position where the second bolt hole does not face the bolt hole; A bolt insertion hole is formed through the lower end of the steel pipe pile at a position corresponding to the first and second bolt holes; The joint connector is assembled and coupled to the upper portion of the PHC pile and the lower end of the steel pipe pile is sandwiched between the vertical plate and the stone substrate so that the coupling bolt is moved from the outer surface of the vertical plate to the first bolt hole and the bolt insertion hole and the second bolt hole The bolt head of the bolt is inserted into the bolt insertion hole and the bolt head of the bolt is fixed in a state of being closely attached to the outer surface of the vertical plate. At the position where the opening is formed, the bolt is sequentially inserted through the bolt insertion hole and the second bolt hole, Wherein the pile is fixed to the outer surface of the pile so that the pile of the steel pipe is pressed against the stone substrate.

In the composite pile of the present invention, a bottom coupling hole is formed in the bottom plate, and the vertical bolt is fixed to the upper surface of the PHC pile through the bottom coupling hole from the top in a state where the coupling connector is placed on the PHC pile And a connecting connector is assembled and coupled to an upper portion of the PHC pile. In order to secure a space in which the tool for fastening the vertical bolt rotates the vertical bolt by bending the bolt head of the bolt, A concave portion may be formed on the inner surface of the stone substrate.

In addition, the composite pile of the present invention may further have a structure for rigid connection with a concrete foundation, and a foundation connection assembly for coupling with a concrete foundation may be further provided at an upper end of the steel pipe pile. In order to limit the depth of the vertical embedded steel reinforced concrete embedded in the concrete foundation and the concrete flowing into the interior of the steel pipe pile, the foundation connection assembly is designed so as to interpose the inner hollow of the steel pipe pile at a certain depth from the head of the steel pipe pile. A support rod connected to a bottom end of the bottom plate and extending upwardly, and a horizontal top plate mounted on a head portion of the steel pipe pile and having a ring shape; The upper end of the horizontal upper plate is provided with a concave portion in which the upper end of the support rod is positioned. When the horizontal upper plate is placed on the upper end of the steel pipe pile, the bent upper end of the support rod, The bent upper end of the support rod is located in the recess; The lower end portion of the vertically buried reinforcing bar is formed as a bent end, penetrates from the outside of the steel pipe pile to the steel bar connecting hole formed through the head of the steel pipe pile, the fixing nut is coupled to the bent end from the inside of the steel pipe pile; When combined with the concrete foundation, the concrete placed for the construction of the concrete foundation is filled in the hollow interior of the steel pipe pile to the upper side of the bottom plate, so that the head of the steel pipe pile and the vertical embedded steel of the foundation connection assembly can be embedded in the concrete foundation have.

In order to achieve the above object, according to the present invention, there is provided a joining connector for forming a composite pile by integrally connecting a lower PHC pile and an upper steel pipe pile, wherein the joining connector comprises a bottom plate, Wherein a plurality of second bolt holes are formed through the protruding plate, and a first bolt hole is formed in the vertical plate at a position facing a part of the second bolt hole, In the position where there is a second bolt hole not facing the one bolt hole, an opening is formed in the vertical plate; PHC pile and the lower end of the steel pipe pile is sandwiched between the vertical plate and the stone plate, the bolt is inserted from the outer surface of the vertical plate into the bolt insertion hole at the lower end of the vertical pile and the second bolt hole The bolt head of the coupling bolt is fixed in a state of being tightly adhered to the outer surface of the vertical plate. At the position where the opening is formed, the bolt is sequentially inserted through the bolt insertion hole and the second bolt hole, Wherein the PHC pile of the lower part and the steel pipe pile of the upper part are integrally formed in such a manner that the PHC pile is closely attached to the outer surface of the steel pipe pile and is fixed while pressing the steel pipe pile to the stone substrate.

According to the present invention, in the case of forming a composite pile by disposing a joint connector between the PHC pile and a steel pipe pile, the steel pipe pile is fixed to the stone substrate of the joint connector while tightly adhering thereto. Therefore, it is possible to prevent effectively the occurrence of structural instability and breakage due to an increase in the bending moment due to the lateral displacement of the steel pipe pile, which has been pointed out as a problem in the prior art. The effect that can be achieved is demonstrated.

Further, in the present invention, when the steel pipe pile is assembled with the joint connection and integrally joined by the bolt, the bolt insertion hole formed in the steel pipe pile may be made into a simple piercing-type through hole without a threaded portion. It is possible to perform an integration work with the PHC pile using the joint connector and thus the workability is greatly improved.

Furthermore, according to the present invention, the coupling strength between the steel pipe pile and the joint connector is remarkably increased, and the center of the steel pipe pile and the center of the PHC pile can be automatically and easily matched.

In the composite pile according to the present invention, the steel pipe pile and the concrete foundation can be firmly integrated with each other. According to the integrated structure of the additional steel pipe pile-concrete foundation, the steel pipe pile is combined with the steel pipe pile, The diameter of the cylindrical reinforcing bar made by the embedded vertical reinforcing bar becomes larger than the diameter of the steel pipe pile. Therefore, the resistance moment for the bending moment load exerted at the joint portion between the steel pipe pile and the concrete foundation becomes larger, thereby reducing the amount of vertical buried reinforcing steel to be buried in the concrete foundation, thereby reducing the material cost, And an economical construction is enabled.

According to the integrated structure of the steel tube pile-concrete foundation in the composite pile of the present invention as described above, in supporting the compressive force transmitted from the upper structure through the concrete foundation while the steel pipe pile is embedded in the concrete foundation, Since the horizontal top plate is installed on the head of the steel pipe pile and the compressive force is supported by a large area of the horizontal top plate, punching failure of the concrete foundation can be effectively prevented. In addition, in the integrated structure of the steel tube pile-concrete foundation in the composite pile of the present invention as described above, since the bent end of the vertically buried reinforcing bar embedded in the concrete foundation is connected to the steel pipe pile with passing through the horizontal top plate, The vertical reinforcing bars can maintain the vertical installation state stably until the vertical reinforcing bars are pulled out. Accordingly, the pulling resistance of the vertical reinforcing bars can be effectively exerted, the flexural strength is further increased, and the workability is greatly improved. do. Particularly, since the integrated structure of the steel tube pile-concrete foundation in the composite pile of the present invention has a mechanical coupling structure between the steel pipe pile and the bent end, it is possible to reduce the length required for installing the vertical reinforcing steel vertically Thereby reducing the material cost and improving the economical efficiency of the construction.

According to the integrated structure of the steel pipe pile-concrete foundation in the composite pile of the present invention, when the foundation connection assembly is installed on the head of the steel pipe pile, the concrete is inserted so that the head of the head reinforcement device and the steel pipe pile are embedded in the concrete, Since the foundations are constructed, it is possible to achieve a firm coupling between the concrete foundation and the steel pipe pile, thereby exhibiting an effect of exhibiting a large pulling resistance force.

Further, according to the integrated structure of the steel pipe pile-concrete foundation in the composite pile of the present invention, the vertical reinforcing steel which is fastened to the head of the steel pipe pile and embedded in the concrete foundation can stably maintain the vertical state, It is possible to effectively exert the pullout resistance of the reinforcing bar and to further increase the flexural strength exerted in the connection between the steel pipe pile and the concrete foundation.

1 is a schematic half cross-sectional perspective view showing a structure in which a PHC pile and a steel pipe pile are connected according to a conventional technique.
FIG. 2 is a schematic cross-sectional view showing a state where a PHC pile and a steel pipe pile are connected by the prior art shown in FIG. 1. FIG.
FIG. 3 is a schematic exploded perspective view showing that a composite pile is formed by using the joint connector of the present invention.
4 is a schematic perspective view showing in detail only the joint connecting portion of the present invention.
Figs. 5 and 6 are respectively a schematic half sectional view showing the state after the composite pile of the present invention is formed, following the state of Fig. 3, respectively. Fig.
7 is a schematic exploded perspective view showing a structure in which a head reinforcement device is installed at the upper end of a steel pipe pile in a composite pile of the present invention.
FIG. 8 is a schematic perspective view of a composite pile according to the present invention, showing a state after a head reinforcement device is installed on an upper end of a steel pipe pile.
FIG. 9 is a schematic cross-sectional view of the composite pile of the present invention having a head reinforcement device, taken along line AA of FIG. 8, showing a structure in which the upper end of a steel pipe pile is embedded in a concrete foundation.
FIG. 10 is a schematic cross-sectional view of the composite pile of the present invention having a head reinforcement device, taken along line BB in FIG. 8, showing the structure in which the upper ends of the steel pipe piles are embedded in a concrete foundation.
11 is a schematic enlarged view of the circle G portion of Fig.
FIG. 12 is a schematic enlarged view corresponding to FIG. 11 showing a state where a bent end is joined to a steel pipe pile by an adjusting nut and a fixing nut.
13 is a schematic cross-sectional view for explaining a reaction force for supporting a vertical load in a joint structure of a concrete foundation and a steel pipe pile according to the present invention.
14 is a schematic exploded perspective view showing a structure in which a foundation connection assembly having another type of horizontal top plate is installed at the upper end of a steel pipe pile in the composite pile of the present invention.
FIG. 15 is a schematic perspective view showing a state after the foundation connection assembly shown in FIG. 14 is installed on the upper end of the steel pipe pile of the composite pile of the present invention.
FIG. 16 is a schematic cross-sectional view of the composite pile of FIG. 14 and FIG. 15, taken along the line EE of FIG. 15, showing the construction in which the upper ends of the composite piles of the present invention are embedded in a concrete foundation.
FIG. 17 is a schematic cross-sectional view of the composite pile according to the present invention shown in FIG. 14 and FIG. 15 at the line FF position in FIG. 15 showing a structure in which the upper ends of the composite piles are embedded in a concrete foundation.
18 is a schematic enlarged view of the circle D portion of Fig.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. Although the present invention has been described with reference to the embodiments shown in the drawings, it is to be understood that the technical idea of the present invention and its essential structure and operation are not limited thereby. In describing the present invention, some of the constituent elements corresponding to the prior art are given the same reference numerals as those used in describing the prior art.

3 is a schematic exploded perspective view showing a PHC pile 10 and a steel pipe pile 20 connected to each other to form a composite pile 100 using the joint connector 1 of the present invention. There is shown a schematic perspective view showing only the joint connector 1 of the present invention in detail. 5 and 6 are schematic views showing the state after the PHC pile 10 and the steel pipe pile 20 are connected by the joint connector 1 of the present invention to form the composite pile 100, 5 is a schematic half cross-sectional perspective view at a position where the first bolt hole 51 is formed, that is, at a position indicated by an arrow KK in Fig. 3, and Fig. 6 shows an open half- And a second bolt hole 52 are formed, that is, at a position indicated by an arrow JJ in Fig. 3.

As shown in the figure, a joint connector (1) is used when a steel pipe pile (20) is placed on an upper portion of a PHC pile (10) located at the bottom and integrally joined to each other. The joining connector 1 includes a bottom plate 2 of a circular frame shape made of a steel material, a vertical plate 3 vertically erected at the outer edge of the bottom plate 2, And a stone substrate 4 which is vertically erected with an interval therebetween. If necessary, a reinforcing rib 44 may be further provided between the inner surface of the stone substrate 4 and the bottom plate 2. The bottom plate 2 is formed with a plurality of bottom coupling holes 54 spaced along the circumference of the PHC pile 10. The position of the bottom coupling hole 54 is determined by the landing position of the buried nuts existing on the upper surface of the PHC pile 10, It matches the position of the bolt fastening hole. The concave portion 40 is formed on the inner surface of the stone substrate 4 at the position where the bottom engaging hole 54 is formed. As shown in the figure, the concave portion 40 may be a shape that completely penetrates the stone substrate 4. Alternatively, the concave portion 40 may be a shape that completely removes the thickness of the stone substrate 4 from the inner surface of the stone substrate 4, The concave portion 40 may be formed in a through-hole shape. The joint connector 1 is placed on the upper surface of the PHC pile 10 and the vertical bolt 5c is inserted into the bottom hole 54 to be coupled to the upper surface of the PHC pile 10. In the present invention, It is possible to secure sufficient space for rotating the vertical bolt 5c by engaging the tool with the bolt head of the vertical bolt 5c by forming the recess 40 on the inner surface of the stone substrate 4 at the position where the vertical bolt 5c is formed So that the vertical bolt 5c penetrates through the bottom coupling hole 54 and is bolted to the PHC pile 10. In this way,

The second bolt hole 52 is formed in the protruding plate 4 so that the second bolt hole 52 is spaced apart in the circumferential direction of the protruding plate 4 As shown in FIG. The second bolt hole 52 may be formed as a simple through hole, but it is preferable that the second bolt hole 52 is made of a screw through hole having a threaded portion formed on the inner surface of the hole so that the bolts 5a and 5b can be screwed.

The first bolt hole 51 is formed in the vertical plate 3 at a position facing a part of the second bolt hole 52. The first bolt hole 51 is formed at a position facing a part of the second bolt hole 52. [ That is, the first bolt holes 51 are formed at a plurality of positions corresponding to the second bolt holes 52, and the number of the first bolt holes 51 is smaller than the number of the second bolt holes 52 will be. Therefore, a plurality of the second bolt holes 52 are not opposed to the first bolt holes 51. In this way, the second bolt hole 52 is formed in the second bolt hole 52, An opening 30 is formed in the vertical plate 3. In other words, the vertical plate 3 is provided with an opening 30 opposed to a portion of the second bolt hole 52, and the opening 30 exists in a plurality of rows along the circumference. The opening 30 may be cut off from the upper edge of the vertical plate 3 as shown in the drawing, but it may be formed in the form of a through hole. The first bolt hole 51 may be formed as a simple through hole, but it is preferable that the first bolt hole 51 is made of a screw through hole having a threaded portion formed on the inner surface of the hole so that the coupling bolt 5a can be screwed. Since the joint connector 1 is pre-manufactured in the factory, it is easy to form the first bolt hole 51 and the second bolt hole 52 with screw through holes.

The PHC pile 10 is a circular concrete pile having a hollow. On the upper surface of the PHC pile 10, a buried nut is embedded or a bolt fastening hole is formed so that the vertical bolt 5c can be bolted. A bolt insertion hole 23 is formed at a position corresponding to the first and second bolt holes 51 and 52 at the lower end of the steel pipe pile 20 coupled with the PHC pile 10.

In order to form the composite pile 100 by integrally connecting the PHC pile 10 and the steel pipe pile 20, the PHC pile 10 and the joint connector 1 are integrally combined. To this end, the connecting connector 1 is placed on the PHC pile 10 so that the bottom plate 2 of the connecting connector 1 is in close contact with the upper surface of the PHC pile 10. The position of the bottom coupling hole 54, The vertical bolt 5c is screwed to the buried nuts or the bolt fastening holes through the bottom engaging holes 54 from the top in the state where the positions of the buried nuts or the bolt fastening holes on the upper surface of the pile are matched, Is firmly integrated with the PHC pile 10. [

As described above, the joint connector (1) is placed on the PHC pile (10) and integrally joined, and the steel pipe pile (20) is fitted and joined to the joint connector (1). Concretely, the lower end of the steel pipe pile 20 is fitted in the space between the stone substrate 4 and the vertical plate 3. [ When the lower end of the steel pipe pile 20 is fitted to the gap between the vertical plate 3 and the stone substrate 4 in this way, the lower end of the steel pipe pile 20 is covered with the stone substrate 4 and the vertical plate 3 So that the bending strength can be further improved.

The lower end of the steel pipe pile 20 is fitted to the joint connector 1 and the coupling bolt 5a is inserted from the outer surface of the vertical plate 3 into the first bolt hole 51 and the bolt insertion hole 23, The tightening bolts 5b are inserted into the bolt insertion holes 23 and the second bolt holes 52 in succession without passing through the openings 30 without any restriction, And is fixed. 5, the bolt head of the coupling bolt 5a inserted into the first bolt hole 51 is tightly fixed to the outer surface of the vertical plate 3, The bolt head 5b, which is inserted directly into the bolt insertion hole 23 of the steel pipe pile 20, is fixed in a state of being in tight contact with the outer surface of the steel pipe pile 20 as shown in FIG. Therefore, the steel pipe pile 20 is pressed against the stone substrate 4 by the insertion of the tightening bolt 5b, thereby being brought into a state of being in close contact with the outer surface of the stone substrate 4.

The first bolt hole 51 of the vertical plate 3 and the second bolt hole 51 of the vertical plate 3 can be fixed by fastening the nut to the end of the bolt 5a on the inside of the stone substrate 4 after the bolt 5a is inserted through, When the threaded portion is formed on the inner surface of at least one of the second bolt holes 52 of the stone substrate 4, the bolt 5a is inserted into the first bolt hole 51 and the second bolt hole 52 sequentially The threaded portion formed on the outer surface of the coupling bolt 5a is screwed to the threaded portion on the inner surface of the hole so that it is not necessary to fasten and fix the nut to the end of the coupling bolt 5a on the inner side of the protruded board 4 So that the integration operation of the steel pipe pile 20 by the coupling bolt 5a and the joint connector 1 becomes easier.

The tight bolts 5b are inserted only through the steel pipe pile 20 and the stone substrate 4. [ The tightening bolt 5b passes through the opening 30 without any interference and is sequentially fitted into the coupling hole 23 and the second bolt hole 52 formed in the steel pipe pile 20. [

The worker may insert the tightening bolt 5b through the bolt insertion hole 23 from the outer surface of the steel pipe pile 20 and subsequently insert it into the second bolt hole 52. [ Since the opening 30 formed in the vertical plate 3 is a hole large enough to prevent the use of the tool for fastening the tightening bolt 5b, the operator can easily perform the tightening operation of the tightening bolt 5b can do. The nut may be fixed to the end of the tightening bolt 5b projecting to the inner surface of the stone substrate 4 after the tightening bolt 5b is passed through the steel pipe pile 20 and the stone substrate 4. However, If the bolt hole 52 is formed by a screw hole, the bolt insertion hole 23 of the steel pipe pile 20 is formed as a simple through hole. Even if the nut is not used, the bolt insertion hole 23 and the bolt insertion hole 23 2 bolt hole 52, and can be more easily fixed.

According to the present invention, the tightening bolt 5b is fixed while tightly attaching the steel pipe pile 20 to the stone substrate 4 with the above-described structure. Therefore, when the steel pipe pile 20 is sandwiched between the vertical plate 3 and the stone substrate 4, the thickness of the steel pipe pile 20 and the distance between the vertical plate 3 and the stone substrate 4 are different from each other The steel pipe pile 20 is maintained in a state of tightly adhered to the stone substrate 4 and thus the lateral movement of the steel pipe pile 20, which is a problem that has been caused in the related art, . Therefore, according to the present invention, the disadvantage of the prior art, namely, the effect of the excessive bending moment due to the lateral movement (transverse displacement) occurring in the steel pipe pile 20, the structural instability thereof and the effect of the steel pipe pile 20 and the joint connector 1) and the like can be effectively prevented. Particularly, in this case, the bolt insertion hole 23 through which the tightening bolt 5b passes in the steel pipe pile 20 may be a simple through-hole without a threaded portion. Therefore, the advantage of minimizing the machining operation of the steel pipe pile 20 is exhibited.

In the present invention, there is also an engaging bolt 5a which penetrates through the vertical plate 3, the steel pipe pile 20 and the stone substrate 4, so that the steel pipe pile 20, The force due to the axial force and the bending moment acting in the longitudinal direction of the pile 20 is not only the shear rigidity of the tightening bolt 5b which closely contacts the steel pipe pile 20 with the stone substrate 4, The strength of the joint between the steel pipe pile 20 and the joint connector 1 is remarkably increased by the shear rigidity of the joint bolt 5a passing sequentially through the stone substrate.

Particularly, in the present invention, the joint pipe 1 is integrally connected to the head of the PHC pile 10, and the steel pipe pile 20 is inserted into the joint connector 1, The steel pipe pile 20 is firmly integrated with the PHC pile 10 so that when the connecting connector 1 is preliminarily joined to the PHC pile 10 at the manufacturing site, The center of the PHC pile 10 is made to coincide with the center of the PHC pile 10 so that the PHC pile 10 is transported to the field so that the PHC pile 10 is installed in the ground. There is an advantage that the center of the steel pipe pile 20 and the center of the PHC pile 10 are automatically matched only by sandwiching between the straight plate 3 and the stone substrate 4. [

The composite pile 100 of the present invention composed of the PHC pile 10 and the upper steel pipe pile 20 is further provided at the upper end of the steel pipe pile 20, A description will be given of the foundation connection assembly 80 that can be used for the concrete foundation C and further the construction for combining the concrete foundation C with the composite pile 100 will be described.

7 and 8 are schematic exploded perspective views showing a structure in which the foundation connecting assembly 80 is installed on the upper end or the head portion of the steel pipe pile 20 in the composite pile 100 of the present invention And a combined perspective view (Fig. 8). 9 and 10 are schematic cross-sectional views showing a configuration in which the upper end of a steel pipe pile 20 provided with a foundation connection assembly 80 is embedded in a concrete foundation C to be integrated with each other. 10 shows a schematic cross-sectional view at the position of the line AA of the support rod 84, that is, the position at which the vertical buried reinforcing bar 82 is coupled to the horizontal top plate 81, A schematic cross-sectional view at the engaged position is shown. Fig. 11 is a schematic enlarged view of the circle G shown in Fig. 9, and Fig. 12 is an enlarged view corresponding to Fig. 11, showing a bent end 820 of the vertical buried reinforcing bar 82 by an adjusting nut and a fixing nut. 9 is a schematic enlarged view of the circle G portion of FIG. 9 showing a state where the position coupled to the steel pipe pile 20 is varied.

The foundation connection assembly 80 connected to the head of the steel pipe pile 20 for the connection between the steel pipe pile 20 and the concrete foundation C comprises a vertical buried reinforcing bar 82 embedded in the concrete foundation C, In order to limit the depth of the concrete flowing into the inside of the steel pipe pile 20, it is installed in the inner hollow of the steel pipe pile 20 so as to block the inner hollow of the steel pipe pile 20 to a certain depth from the head of the steel pipe pile 20 A support bar 84 coupled to the bottom of the bottom plate 83 and extending upwardly and a horizontal top plate 81 installed on the top of the bottom of the steel pipe pile 20, .

In order to limit the inflow depth of the concrete, when the concrete is laid for the construction of the concrete foundation C, the poured concrete is introduced into the hollow portion of the steel pipe pile 20, And a bottom plate 83 made of a plate material interrupting the inner hollow of the upper and lower plates. The bottom plate 83 may be provided by a support rod 84 made of a rod member. In the embodiment of the present invention shown in the drawing, the lower end of the support rod 84 is bent toward the hollow portion of the steel pipe pile 20, and the bottom plate 83 is placed on the bent end of the support rod 84 Lt; / RTI > A hole 830 is formed in the bottom plate 83 as illustrated in the figure so that the bottom plate 83 is placed on the bent end of the support rod 84 with the support rod 84 passing through the hole 830 Is preferable for the installation of the stable bottom plate 83. [ However, the coupling structure of the lower end of the support rod 84 and the bottom plate 83 is not limited to this and can be modified.

The horizontal upper plate 81 is a plate member having a ring shape to be placed on the upper edge of the steel pipe pile 20, that is, on the head of the steel pipe pile 20 so as to cross the steel pipe pile 20. [ A part of the width of the horizontal upper plate 81 encircles the hollow portion of the steel pipe pile 20 and the remaining width of the steel pipe pile 20 in the horizontal direction 81, As shown in FIG. At the outer edge of the horizontal upper plate 81 is formed a recess 811 in which the upper end of the support bar 84 is located. The support rod 84 can be installed in a state where the horizontal upper plate 81 is placed on the upper end of the steel pipe pile 20. Since the bent portion of the upper end of the support rod 84 is located in the recess 811, 20 is prevented from horizontally moving and rotating, and thus, the originally laid state is maintained constantly.

The vertical buried reinforcing bars 82 embedded in the concrete foundation C are installed vertically with the lower ends of the reinforced reinforcing bars 82 engaged with the upper ends of the steel pipe piles 20. The lower end of the vertical buried reinforcing bar 82 is bent to form a bent end portion 820. The bent end portion 820 is fitted into a reinforcing bar coupling hole 28 formed through the head of the steel pipe pile 20, ) In a mechanical manner. In particular, the bent end portion 820 is fitted into the reinforcing bar coupling hole 28 from the outside of the steel pipe pile 20. [ Therefore, when the vertical buried reinforcing bars 82 are positioned outside the steel pipe pile 20 and a plurality of the vertical buried reinforcing bars 82 are arranged in parallel to form a cylindrical shape, the diameter of the vertical buried reinforcing bars 82 on the cylindrical shape is And becomes larger than the outer diameter of the steel pipe pile 20. The vertical buried reinforcing bar 82 functions to transmit the bending moment load transmitted from the upper structure through the concrete foundation C to the steel pipe pile 20. In the present invention, The bent end portion 820 of the steel pipe pile 20 is fitted into the reinforcing bar coupling hole 28 of the steel pipe pile 20 from the outside of the steel pipe pile 20 so that the diameter of the cylindrical shape formed by the vertically- 20, and therefore the resistance moment with respect to the bending moment load becomes larger. As the resistance moment is increased, the amount of the vertical buried reinforcing bar 82 to be buried in the concrete foundation C can be reduced correspondingly, thereby reducing the material cost and improving the workability. .

As shown in the drawing, the bent end portion 820 of the vertical buried reinforcing bar 82 is formed with a threaded portion. The bent end portion 820 penetrates through the adjusting nut 281 while being screwed into the adjusting nut 281, And the fixing nut 282 is coupled to the bent end portion 820 at the inside of the steel pipe pile 20. [ In this configuration, if the adjustment nut 281 is rotated to change its position, the position of the vertically buried reinforcing bar 82 can be made further away from the outer surface of the steel pipe pile 20 as shown in FIG. 12, The diameter of the cylindrical shape formed by the vertical buried reinforcing bar 82 becomes larger. That is, by rotating the adjusting nut 281, the cylindrical diameter of the vertical buried reinforcing bar 82 can be easily adjusted to a required degree.

Particularly, the adjustment nut 281 also functions to control the depth of the bent end portion 820 inserted into the steel pipe pile 20 through the reinforcing bar coupling hole 28. That is, the end of the bent end portion 820 is prevented from being excessively projected from the inside of the steel pipe pile 20. [ By controlling the insertion depth of the bent end portion 820, the diameter of the cylindrical reinforcing bar made of the vertical buried reinforcing bar 82 can be kept constant. It is also possible to form the screw portion at the bent end portion 820 in place of the adjusting nut 281 when only the insertion depth control of the bent end portion 820 is intended, Portion of the reinforcing bar 28 may be left to control the depth to be inserted into the reinforcing bar 28. [

As described above, in the present invention, since the bent end portion 820 of the vertical buried reinforcing bar 82 is coupled with the steel pipe pile 20 in a mechanical manner (through the penetration of the reinforcing bar coupling and the coupling using the nut) The vertical reinforcing steel bar 82 can stably maintain the vertical installation state until the vertical reinforcing steel bar 82 is embedded in the steel pipe pile 20 and the steel pipe pile 20 and the concrete foundation C And the workability is also greatly improved. [0052] The present invention is also directed to a method of manufacturing a semiconductor device, Particularly, the mechanical coupling between the steel pipe pile 20 and the bent end portion 820 makes it possible to reduce the length required for vertically installing the vertical reinforcing bar 82, that is, the fixing length, It has advantages of reduction of material cost and improvement of economical efficiency of construction. In addition, since the shape of the cylindrical reinforcing bar made of the vertical reinforcing bar 82 can be firmly maintained, the shape of the cylindrical reinforcing bar can be improved due to vibration or external impact generated during the concrete pouring for the concrete foundation C It is possible to prevent the position of the vertical reinforcing bar 82 from being changed. Accordingly, it is not necessary to further adjust the position of the vertical reinforcing bars 82, and the workability and economical efficiency are improved.

As illustrated in the figure, the transverse band bars 89 may be joined to enclose a plurality of vertical buried reinforcing bars 82 arranged in a cylindrical shape. As described above, in the present invention, since the shape of the cylindrical reinforcing bar made of the vertical reinforcing bars 82 is firmly maintained, it is possible to prevent the lateral bars It is possible to join the vertical reinforcing bars 89 to the vertical buried reinforcing bars 82 and thus to avoid the inconvenience of cast iron roots in the concrete foundation C which may be caused by the presence of the lateral straining bars 89 An advantageous effect is exerted.

In the state that the foundation connection assembly 80 having the above-described structure is installed on the head portion of the steel pipe pile 20, the concrete foundation C is installed by placing the concrete as shown in FIGS. That is, the concrete foundation C is formed so that the head portion of the steel pipe pile 20 protruding above the ground and the vertical embedded steel bar 82 of the foundation connection assembly 80 are embedded. At this time, the poured concrete flows into the hollow interior of the steel pipe pile 20 and is filled into the steel pipe pile 20 upwardly of the bottom plate 83. Thus, the foundation connecting assembly 80 is installed on the head of the steel pipe pile 20, and the head of the steel pipe pile 20 and the foundation connecting assembly 80 are embedded in the concrete foundation C to form an integral body. Therefore, the concrete foundation C and the steel pipe pile 20, that is, the concrete foundation C and the composite pile 100 of the present invention can be firmly connected, thereby exhibiting a large pulling resistance.

13 is a schematic cross-sectional view briefly showing the state shown in FIG. 9 in order to explain the reaction force for supporting the vertical load in the joint structure of the concrete foundation C and the steel pipe pile 20 according to the present invention . The steel pipe pile 20 supports the compressive load P transmitted from the upper structure through the concrete foundation C in a state where the steel pipe pile 20 is embedded in the concrete foundation C, When the steel pipe pile 20 is simply buried without the steel pipe pile 20, there is a great risk that punching failure will be caused in the concrete foundation C because the steel pipe pile 20 supports the compressive force only by the area corresponding to the thickness of the head of the steel pipe pile 20. [ However, in the present invention, a horizontal upper plate 81 having a width and arranged horizontally is installed on the head portion of the steel pipe pile 20, and a bearing force P1 for compressive load is exerted on a large area of the horizontal upper plate 81 . Therefore, there is an advantage that the punching failure of the concrete foundation C that can occur in the conventional art as described above can be effectively prevented.

In the present invention, when the concrete is filled in the steel pipe pile 20, the bent end portion 820 protruding into the steel pipe pile 20 is embedded in the concrete, and the bent end portion 820 is also held by the bearing force P2 ). Furthermore, the supporting rod 84 also exerts a supporting force P3 by the tensile force. Therefore, the present invention has an advantage that the compression force P is much superior to that of the prior art.

In the present invention, the horizontal upper plate 81 has a ring shape. However, in carrying out the present invention, the horizontal upper plate 81 may be used in a circumferential direction.

14 and 15 show a basic connection assembly 80 in which a deformed top plate 81 is provided at the top or head of a steel pipe pile 20 in the composite pile 100 of the present invention, A schematic exploded perspective view (FIG. 14) and a combined perspective view (FIG. 15) are shown showing the installed structure. 16 and 17 show the composite pile 100 of the present invention having the basic connection assembly 80 shown in Figs. 14 and 15, respectively. The upper end of the steel pipe pile 20 is embedded in the concrete foundation C, 16 is a cross-sectional view taken along line EE in Fig. 15, that is, at a position where the vertical buried reinforcing bar 82 is coupled to the horizontal top plate 81, and Fig. 17 shows a cross- 15 is a cross-sectional view at the position of the line FF, that is, at the position where the upper end of the support bar 84 is hooked to the steel pipe pile 20. FIG. 18 shows a schematic enlarged view of the circle D portion of FIG.

7 to 13, the horizontal top plate 81 has a circular ring shape having a width, but in the case of the modified embodiment shown in Figs. 14 to 18, the horizontal top plate 81 is formed in an arc shape And a plurality of arcuate members are arranged at intervals along the circumference of the steel pipe pile 20. [ When the horizontal upper plate 81 is provided in a plurality of divided shapes, the upper end of the support rod 84 is spaced apart from the horizontal upper plate 81, that is, at a position where the horizontal upper plate 81 is not present, ). ≪ / RTI >

7 to 13, the vertical buried reinforcing bar 82 is located outside the horizontal top plate 81, but the divided horizontal top plate 81, as shown in FIGS. 14 to 18, It is preferable that the vertical buried reinforcing bar 82 is vertically installed with its lower end passing through the horizontal upper plate 81. For this, a reinforcing bar hole 810 is formed in the horizontal top plate 81, and a lower end of the vertically embedded reinforcing bar 82 passes through the reinforcing bar hole 81. When the horizontal upper plate 81 is installed on the head portion of the steel pipe pile 20, the horizontal upper plate 81 is formed by the steel pipe pile 20 as seen from the vertical direction, Quot; inner width portion ", and "outer width portion" located outside the steel pipe pile 20. [ The vertical buried reinforcing bar 82 passes through the outer width portion of the horizontal top plate 81. [ That is, the reinforcing bar hole 810 is formed at the outer width portion of the horizontal top plate 81.

14 to 18, the diameter of the cylindrical reinforcing bar made by the vertical buried reinforcing bar 82 is still smaller than the outer diameter of the steel pipe pile 20 So that the resistance moment with respect to the bending moment load becomes larger. As the resistance moment is increased, the amount of the vertical buried reinforcing bar 82 to be buried in the concrete foundation C can be reduced correspondingly, thereby reducing the material cost and improving the workability. .

In the case of using the divided horizontal top plate 81, since the bent end portion 820 of the vertical buried reinforcing bar 82 is coupled to the steel pipe pile 20 in a state of passing through the horizontal top plate 81, The vertical reinforcing steel bar 82 can stably maintain the vertical installation state until it is buried in the foundation C so that the pulling resistance of the vertical reinforcing steel bar 82 can be effectively exerted, Not only the flexural strength exerted in the bonding between the concrete bases C is further increased, but also the workability is greatly improved. Other configurations of the modified embodiments shown in FIGS. 14 to 18 are the same as those of the embodiments of FIGS. 7 to 13 described above, and thus a repetitive description thereof will be omitted.

1: Joint connector
2: bottom plate
3: Vertical plate
4: Stone substrate
10: PHC piles
20: Steel pipe pile
80: base connection assembly
100: Composite pile

Claims (4)

  1. delete
  2. A composite pile (100) in which a lower PHC pile (10) and an upper steel pipe pile (20) are integrated by a joint connection (1)
    The joining connector 1 includes a bottom plate 2 in the form of a circular frame, a vertical plate 3 and a protruding plate 4 spaced from the inner surface of the vertical plate 3, A plurality of second bolt holes 52 are formed in the vertical plate 3 so that a first bolt hole 51 is formed at a position facing a part of the second bolt hole 52 in the vertical plate 3, An opening 30 is formed in the vertical plate 3 at a position where a second bolt hole 52 not facing the first bolt hole 51 is present;
    A bolt insertion hole 23 is formed at a lower end of the steel pipe pile 20 at a position corresponding to the first and second bolt holes 51 and 52;
    The joint connector 1 is assembled to the upper portion of the PHC pile 10 and the lower end of the steel pipe pile 20 is sandwiched between the vertical plate 3 and the stone substrate 4, The first bolt hole 51 and the bolt insertion hole 23 and the second bolt hole 52 are sequentially inserted through the outer surface of the straight plate 3 so that the bolt head of the coupling bolt 5a is inserted into the through- The fastening bolt 5b is inserted through the bolt insertion hole 23 and the second bolt hole 52 in order and the fastening bolt 5b is fastened to the fastening bolt 5b at a position where the opening 30 is formed. The head of the bolt is brought into close contact with the outer surface of the steel pipe pile 20 and is fixed in a state of pressing the steel pipe pile 20 to the stone substrate 4;
    The bottom plate 2 is provided with a bottom coupling hole 54 so that the vertical bolt 5c can move from the top to the bottom coupling hole 54 in a state where the joining connector 1 is placed on top of the PHC pile 10. [ Is fixed to the upper surface of the PHC pile (10) so that the joint connector (1) is assembled to the upper portion of the PHC pile (10);
    In order to secure a space in which the tool for tightening the vertical bolt 5c engages the bolt head of the vertical bolt 5c to rotate the vertical bolt 5c, 4) is provided with a recess (40) on the inner surface thereof.
  3. 3. The method of claim 2,
    The upper end of the steel pipe pile 20 is further provided with a foundation connection assembly 80 for coupling with a concrete foundation;
    The foundation connection assembly 80 includes a vertical buried reinforcing bar 82 embedded in the concrete foundation C and a plurality of vertical reinforcing bars 82 extending from the head of the steel pipe pile 20 to limit the depth of the concrete flowing into the steel pipe pile 20. [ A bottom plate 83 installed at the inner hollow of the steel pipe pile 20 so as to block the inner hollow of the steel pipe pile 20 to a depth and a support bar 84 connected to the bottom plate 83 at the lower end and extending upward, And a horizontal top plate 81 installed over the head of the steel pipe pile 20 and shaped like a ring;
    A concave portion 811 is formed at the outer edge of the horizontal upper plate 81 where the upper end of the support rod 84 is positioned. When the horizontal upper plate 81 is placed on the upper end of the steel pipe pile 20, The bent upper end of the support bar 84 to which the support shaft 83 is coupled is bent over the edge of the head of the steel pipe pile 20 so that the bent upper end of the support bar 84 is located in the recess 811;
    The lower end of the vertical buried reinforcing bar 82 is formed of a bent end portion 820 and penetrates from the outside of the steel pipe pile 20 to the steel bar coupling hole 28 formed through the head of the steel pipe pile 20, A fixing nut 282 is coupled to the bent end portion 820;
    The concrete to be laid for the construction of the concrete foundation C is filled in the hollow interior of the steel pipe pile 20 to the upper side of the bottom plate 83, And the vertical buried reinforcing bars (82) of the foundation connecting assembly (80) are embedded in the concrete foundation (C).
  4. delete
KR1020150084192A 2015-06-15 2015-06-15 Composite Pile with PHC Pile and Steel Tubular Pile by Connecting Apparatus KR101683613B1 (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101867356B1 (en) 2017-10-31 2018-06-15 (주)금산 Connecting apparatus of composit pile
KR101872482B1 (en) 2017-12-05 2018-06-28 주식회사 포유엔지니어링 non-welding construction method of composite pile using pile jointer
KR20190027626A (en) 2017-09-07 2019-03-15 주식회사 포스코건설 Composite pile internally reinforced by steel tube
KR20190036825A (en) 2017-09-28 2019-04-05 주식회사 포스코건설 Composite pile reinforced with steel plate assembly and concrete
KR20200008541A (en) 2019-12-27 2020-01-28 (주)스마텍엔지니어링 Composite Pile with PHC Pile and Steel Tubular Pile, and Manufacturing Method thereof
KR20200008540A (en) 2019-12-27 2020-01-28 (주)스마텍엔지니어링 Composite Pile with PHC Pile and Steel Tubular Pile and Constructing Method thereof, and Reinforcing Method and Structure of such Composite Pile
KR20200124524A (en) 2019-04-24 2020-11-03 김태준 Pile coupler and end reinforcement shoe

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102139278B1 (en) * 2018-09-28 2020-07-30 한국전력공사 Hybrid joint apparatus and joint method for tubular steel pole

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JP2004003359A (en) * 2000-03-30 2004-01-08 Kubota Corp Protective cap
KR101116389B1 (en) * 2011-08-05 2012-02-22 오성남 Composit pile combined steel tubular pile and concrete pile reinforced with connecting structure

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004003359A (en) * 2000-03-30 2004-01-08 Kubota Corp Protective cap
KR101116389B1 (en) * 2011-08-05 2012-02-22 오성남 Composit pile combined steel tubular pile and concrete pile reinforced with connecting structure

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190027626A (en) 2017-09-07 2019-03-15 주식회사 포스코건설 Composite pile internally reinforced by steel tube
KR20190036825A (en) 2017-09-28 2019-04-05 주식회사 포스코건설 Composite pile reinforced with steel plate assembly and concrete
KR101867356B1 (en) 2017-10-31 2018-06-15 (주)금산 Connecting apparatus of composit pile
KR101872482B1 (en) 2017-12-05 2018-06-28 주식회사 포유엔지니어링 non-welding construction method of composite pile using pile jointer
KR20200124524A (en) 2019-04-24 2020-11-03 김태준 Pile coupler and end reinforcement shoe
KR20200008541A (en) 2019-12-27 2020-01-28 (주)스마텍엔지니어링 Composite Pile with PHC Pile and Steel Tubular Pile, and Manufacturing Method thereof
KR20200008540A (en) 2019-12-27 2020-01-28 (주)스마텍엔지니어링 Composite Pile with PHC Pile and Steel Tubular Pile and Constructing Method thereof, and Reinforcing Method and Structure of such Composite Pile

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