KR101174273B1 - Coupling apparatus of concrete pile - Google Patents

Coupling apparatus of concrete pile Download PDF

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Publication number
KR101174273B1
KR101174273B1 KR1020100015301A KR20100015301A KR101174273B1 KR 101174273 B1 KR101174273 B1 KR 101174273B1 KR 1020100015301 A KR1020100015301 A KR 1020100015301A KR 20100015301 A KR20100015301 A KR 20100015301A KR 101174273 B1 KR101174273 B1 KR 101174273B1
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KR
South Korea
Prior art keywords
head
bracket
coupling
pile
tip
Prior art date
Application number
KR1020100015301A
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Korean (ko)
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KR20110095693A (en
Inventor
최성희
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최성희
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Publication date
Application filed by 최성희 filed Critical 최성희
Priority to KR1020100015301A priority Critical patent/KR101174273B1/en
Publication of KR20110095693A publication Critical patent/KR20110095693A/en
Application granted granted Critical
Publication of KR101174273B1 publication Critical patent/KR101174273B1/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
    • E02D5/30Prefabricated piles made of concrete or reinforced concrete or made of steel and concrete
    • 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
    • E02D5/52Piles composed of separable parts, e.g. telescopic tubes Piles composed of segments
    • E02D5/523Piles composed of separable parts, e.g. telescopic tubes Piles composed of segments composed of segments
    • E02D5/526Connection means between pile segments
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS, WEDGES, JOINTS OR JOINTING
    • F16B7/00Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/18Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using screw-thread elements
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00Materials
    • E02D2300/0026Metals
    • E02D2300/0029Steel; Iron

Abstract

The present invention relates to a joint device of a concrete pile, by combining the head coupling portion and the tip coupling hole provided in the head cap and the tip cap with bolts and nuts, the pile is firmly coupled and the construction is simple, anyone can easily connect the pile. To provide a jointing device for concrete piles that allows quick construction by simply matching the central axis of the piles through guide protrusions and guide grooves.
The present invention for achieving the above object is a piling device including a front end bracket is installed on the tip of the hollow hollow, the head bracket is installed on the head, is installed to cover the tip of the pile and the inside is hollow A tip cap, a tip coupling portion installed to protrude vertically along an inner edge of the tip cap, and having a plurality of through holes formed in a horizontal direction, and protruding at predetermined intervals along an outer edge of the tip cap; A tip bracket configured to include a guide protrusion to be positioned at an appropriate position when the tip bracket and the head bracket are coupled to each other; A head cap installed to cover the head of the pile and having a hollow inside, a head coupling part installed to protrude vertically along an outer edge of the head cap and having a plurality of through holes formed in a horizontal direction; A head bracket configured to include a guide groove formed to allow the guide protrusion to be inserted into an upper end of the coupling part; The technical gist of the present invention includes a nut inserted into the through hole of the tip bracket and a bolt inserted into the through hole of the head bracket and coupled to the nut to fasten the tip bracket and the head bracket.

Description

Coupling apparatus of concrete pile

The present invention relates to a joint device for a concrete pile, and the concrete pile that can connect the pile to be connected very simply by connecting the head coupling portion and the head coupling portion installed in the front end bracket and the head bracket of the pile with bolts and It relates to the joint of the pile.

In general, when there is a soft ground in civil engineering or construction work, the concrete pile has been driven to the rock and then the structure has been constructed on it.

Since these concrete piles have a limited length, they must be laid on the soft ground while vertically constructing a plurality of concrete piles.

At this time, the front end cap and the head cap of the metal pile are installed to protect the concrete pile and the head cap.

Conventionally, in order to joint the concrete piles as described above, in the state where the tip caps and the head caps are in contact with each other, the joints of the tip caps and the head caps are welded on site, but the concrete piles are connected. When connecting, there is a problem in that the quality is dependent on the weather condition, the site condition, the skill of the worker, and the like, and thus the quality cannot be maintained.

An object of the present invention for solving the above problems, by combining the head and the head coupling portion and the tip coupling portion provided in the head cap and the tip cap with bolts and nuts, the pile is firmly coupled and the construction is easy, anyone can easily connect the pile In addition, through the guide protrusion and the guide grooves to provide a joint device for the concrete pile to simply match the central axis of the pile to enable fast construction.

The present invention to achieve the object as described above and to perform the problem for eliminating the conventional drawbacks, the inner end is installed on the tip of the hollow pile, and the head is provided to be coupled to the front end engaging In the piling device comprising a head bracket, the front end cap is installed to cover the front end of the pile and is hollow so as to protrude to a predetermined height in a vertical direction along the inner edge of the front end cap, the horizontal direction And a guide protrusion for protruding at predetermined intervals along the outer edge of the tip cap and the tip engaging portion having a plurality of through holes formed so as to be easily positioned at an appropriate position when the tip bracket and the head bracket are coupled. A tip bracket configured to include; The head cap is installed to cover the head of the pile and is hollow inside, and the head cap is installed to protrude to a predetermined height in the vertical direction along the outer edge of the head cap, and the head coupling is formed with a plurality of through holes in the horizontal direction. A head bracket comprising a part and a guide groove formed to insert the guide protrusion at an upper end of the head coupling part; The nut is installed in the through hole of the tip bracket and the through hole of the head bracket and the through hole of the tip bracket are coupled to the nut to be coupled to the nut to fasten the tip bracket and the head bracket.

On the other hand, the present invention is a pile and pile vertical jointing device including a head coupling portion of the head bracket is installed on the head to be coupled to the front end bracket and the front end bracket is installed on the tip of the hollow hollow inside; In the front end bracket and the head bracket is formed in a concave-convex shape that is symmetrical to each other, characterized in that the front end bracket and the head bracket is coupled to each other when connecting the pile and the pile.

In addition, the distal end bracket is installed at the tip of the pile and the inside of the hollow end cap, and is installed to protrude up to a predetermined height in the vertical direction at a predetermined interval along the center of the tip cap and a plurality of through holes in the horizontal direction is formed And a guide protrusion configured to protrude from an outer edge of the tip cap and to be positioned at an appropriate position when the tip bracket and the head bracket are coupled to each other. The head bracket includes the head of the pile. As long as the head cap is installed at the inside of the head cap and protrudes to a certain height in the vertical direction to the inner edge and the outer edge of the head cap so that the distal end portion can be inserted therein and a plurality of through holes are formed in the horizontal direction. The head coupling portion of the pair, and the upper portion of the head coupling portion installed on the outer edge to correspond to the guide projection It is configured to include a guide groove, the through-hole of the head coupling portion formed in the through hole of the head coupling portion formed on the inner edge of the head bracket, inserted through the through hole of the head coupling portion formed in the outer edge of the head bracket through the through hole of the tip bracket It is characterized by being fastened by a bolt coupled to the nut through.

In addition, the tip coupling portion and the head coupling portion is characterized in that the installation is configured to be separated into at least three or more pieces.

As described above, according to the present invention, by easily assembling the front end coupler and the head coupler using bolts and nuts, it is easy to install the pile joint, even for unskilled people, the pile is tightly coupled and excellent bonding force In addition, the guide protrusion and the guide groove is easy to match the central axis of the pile is a very useful invention that can be made quickly through the communication work of the through-holes formed in the tip connection portion and the head connection portion.

1 is a perspective view showing the distal end bracket of the pile joint according to an embodiment of the present invention,
Figure 2 is a perspective view showing the head bracket of the pile joint according to an embodiment of the present invention,
3 is a cross-sectional view showing a separation state when the bolt coupling of the pile joint according to an embodiment of the present invention,
Figure 4 is a cross-sectional view showing a coupling state when the bolt coupling of the pile joint according to an embodiment of the present invention,
5 is an exploded cross-sectional view showing a fixing structure by the guide projection when coupling the pile joint according to an embodiment of the present invention,
Figure 6 is a cross-sectional view showing a fixing structure by the guide projection when coupling the pile joint according to an embodiment of the present invention,
Figure 7a is a plan view showing a separation structure of the front end coupling of the pile joint according to an embodiment of the present invention,
Figure 7b is a plan view showing the separation structure of the head coupler of the pile joint according to an embodiment of the present invention,
8 is a perspective view showing the distal end bracket of the pile joint according to another embodiment of the present invention,
9 is a perspective view showing the head bracket of the pile joint according to another embodiment of the present invention,
10 is a cross-sectional view showing a separation state when the bolt coupling of the pile joint according to another embodiment of the present invention,
11 is a cross-sectional view showing a coupling state when the bolt coupling of the pile joint according to another embodiment of the present invention,
12 is an exploded cross-sectional view showing a fixing structure by the guide projection when coupling the pile joint according to another embodiment of the present invention,
Figure 13 is a cross-sectional view showing a fixing structure by the guide projection when coupling the pile joint according to another embodiment of the present invention,
14 is an exemplary view showing a guide protrusion according to another embodiment of the present invention.

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

1 is a perspective view showing the front end bracket of the pile joint according to an embodiment of the present invention, Figure 2 is a perspective view showing the head bracket of the pile joint according to an embodiment of the present invention, Figure 3 is an embodiment of the present invention 4 is a cross-sectional view showing a separated state when the bolt coupling device of the pile joint according to the example, Figure 4 is a cross-sectional view showing a coupling state when the bolt coupling device according to an embodiment of the present invention, Figure 5 is an embodiment of the present invention Separation cross-sectional view showing a fixing structure by the guide protrusion when the coupling of the pile coupling device, Figure 6 is a coupling cross-sectional view showing a fixing structure by the guide projection when coupling the pile coupling device according to an embodiment of the present invention,

The pile joint device of the present invention has a head bracket 200 installed at the tip of the pile 100 having a hollow central portion, and a head bracket installed at the head of the pile 100 so as to be fastened to the tip bracket 200. 300 and the bolt 400 to fasten the tip bracket 200 and the head bracket 300 is configured to include a nut (410).

The front end bracket 200 is hollow at the center thereof and is formed at a predetermined height along the edge of the support ring 212 and the support ring 212 attached to the tip of the pile 100 to surround the outer circumferential surface of the pile 100. A tip cap 210 made of a reinforcing band 211 and a predetermined height along an inner edge of the support ring 212, and a plurality of through holes 221 are formed at predetermined intervals along a horizontal direction. The tip coupling portion 220 and protruded at predetermined intervals along the outer edge of the support ring 212 may be placed in a position where the center of the pile can be matched when the tip bracket 200 and the head bracket 300 are coupled. It comprises a guide protrusion 230 to be.

The head bracket 300 is formed in a predetermined height along the edge of the support ring 312 and the support ring 312 attached to the head of the pile 100 is hollow in the center to surround the outer peripheral surface of the pile 100 A head cap 310 having a reinforcing band 311 and a head having a predetermined height along the outer edge of the support ring 312 and having a plurality of through holes 221 formed at predetermined intervals along a horizontal direction. It comprises a coupling portion 320, the guide groove 330 is formed concave so that the guide protrusion 230 can be inserted into the top of the head coupling portion 320.

Peanut-shaped steel rod coupling hole 213 is connected to the support ring (212, 312) of the front end cap 210 and the head cap 310 so that the steel bar 500 embedded in the pile when the pile 100 is connected ) 313 is formed at regular intervals.

The tip bracket 200 and the head bracket 300 configured as described above are provided with a nut 410 inside the through hole 221 of the tip coupling part 220 and the tip coupling part 220 and the head coupling part 320. ) Is installed in the through hole 221 of the front end coupling part 220 by inserting the bolt 400 through the through hole 321 of the head coupling part 320 in a state where the through hole 321 is in communication. By coupling to the nut 410, the distal end bracket 200 and the head bracket 300 are fastened to each other so that the joint construction of the pile 100 is performed.

In addition, the guide protrusion 230 formed on the support ring 212 of the front end bracket 200 when the front end bracket 200 and the head bracket 300 are coupled to the head coupling part 320 of the head bracket 300. The center axis of the pile 100 to be jointed by being inserted into the groove 330 is easily matched, and thus the center of the pile 100 is matched so that the penetration of the tip coupling portion 220 and the head coupling portion 200 correspond to each other. The holes 221 and 321 are positioned so that the bolt 400 is easily coupled.

As such, the present invention assembles the tip bracket 200 and the head bracket 300 through the bolt 400 and the nut 410 to perform the joint construction of the pile 100, and thus the construction is simple and the guide protrusion 230 and the guide. The central axis of the pile 100 coincides with the groove 330, and the through hole 221 for assembling the bolt 400 communicates with each other, thereby making rapid construction.

The front coupling portion 220 and the head coupling portion 320 may be configured to be separated into at least three pieces as shown in Figure 7a, 7b.

In this case, when the tip coupling part and the head coupling part are separated into three or more pieces and welded to the tip and the head bracket, only the materials required in the manufacturing process of the tip coupling part and the head coupling part are processed. There is no material loss than processing, and at the same time, the tip coupling part and the head coupling part are installed in only part of the tip bracket and the head bracket, thereby reducing the material cost and also facilitating the processing.

On the other hand, Figure 8 is a perspective view showing the front end bracket of the pile joint according to another embodiment of the present invention, Figure 9 is a perspective view showing the head bracket of the pile joint according to another embodiment of the present invention, Figure 10 is Figure 11 is a cross-sectional view showing the separation state when the bolt coupling of the pile coupling apparatus according to another embodiment, Figure 11 is a cross-sectional view showing a coupling state when the bolt coupling device according to another embodiment of the present invention, Figure 12 is another embodiment of the present invention Separation cross-sectional view showing a fixing structure by the guide protrusion when the coupling of the pile joint according to the example, Figure 13 is a cross-sectional view showing a fixing structure by the guide projection when coupling the pile joint according to another embodiment of the present invention,

The pile fitting device of the present invention has a head bracket 200 installed at the tip of the pile 100 having a hollow central portion, and a head bracket installed at the head of the pile 100 so as to be fastened to the tip bracket 200. And a bolt 400 and a nut 410 for fastening the tip bracket 200 and the head bracket 300 to each other, wherein the tip bracket 200 and the head bracket 300 are uneven. Are combined.

The tip bracket 200 has a reinforcing band formed at a predetermined height along the edge of the support ring 212 and the support ring 212 attached to the front end of the pile 100 to the center of the hollow to surround the outer peripheral surface of the pile ( A front end cap 210 and a front end coupling portion 220 which protrude vertically at predetermined intervals along a central portion of the support ring 212 and a plurality of through holes 221 are formed in a horizontal direction. In addition, the guide protrusion 230 is formed to protrude at predetermined intervals along the outer edge of the support ring 212 to be positioned at an appropriate coupling position when the front end bracket 200 and the head bracket 300 are coupled. It is composed.

On the other hand, the head bracket 300 is formed in a predetermined height along the edge of the support ring 312 and the support ring 312 attached to the head of the pile 100 is hollow in the center to surround the outer peripheral surface of the pile 100 The head cap 310 made of a reinforcing band 311 and the head coupling portion 310 are formed to protrude vertically along the inner and outer edges of the head cap 310 so that the front end coupling portion 220 can be inserted therethrough, and a plurality of penetrating in the horizontal direction. A predetermined distance between the pair of head coupling portions 320 in which the holes 321 are formed, and the head coupling portions 320 positioned at the outer edges thereof to correspond to the guide protrusions 230 of the tip bracket 200. It is configured to include a guide groove 330 is formed as.

Peanut-shaped so that the steel bar 500 embedded in the pile when the pile 100 is also connected to the support ring 212, 312 of the tip cap 210 and the head cap 310 according to another embodiment Steel bar coupling holes 213 and 313 are formed at regular intervals.

The tip bracket 200 and the head bracket 300 according to another embodiment configured as described above are coupled so that the tip coupling portion 220 is fitted between the head coupling portion 330, and the pile 100 is predetermined. The guide protrusion 230 of the tip bracket 200 is inserted into the guide groove 330 of the head bracket 300 while rotating at an angle.

At this time, the nut 410 is installed in the through hole 221 of the head coupling part 320 located at the inner edge of the head bracket 300 to allow the bolt 400 to be coupled thereto.

The nut may be installed to be inserted into the through hole 221 or may be installed to be welded to the outside of the through hole so as to communicate with the through hole.

When the guide protrusion 230 is inserted into the guide groove 330 in this way, the head coupling part 220 and the head coupling part 220 formed at the outer edge thereof are positioned to communicate with each other through holes 221 and 321 of the head coupling part 330. The bolt 400 is inserted through the through hole 321 of the 320 to pass through the through hole 221 of the tip coupling part 220, and then assembled to the nut 410 of the head coupling part 220 formed at the inner edge thereof. By doing so, the front end bracket 200 and the head bracket 300 are fastened to each other, so that the construction of the pile is performed.

As described above, the present invention according to another embodiment is coupled to the head coupling part 320 of the head bracket 300 by the tip coupling part 220 of the tip bracket 200 in a fitting structure, thereby providing excellent coupling force, and the bolt 400. And by being firmly coupled through the nut 410, the assembly is made very simple.

On the other hand, the through hole formed in the tip bracket is formed in the form of a long hole so that even if a slight error occurs when the tip bracket and the head bracket is coupled to facilitate the fastening of the bolt fitted through the through hole of the head bracket.

The present invention according to each embodiment as described above is easily matched the central axis of the pile 100 through the guide protrusion 230 and the guide groove 330 during the joint construction of the pile 100, the tip according to the center axis coincidence Through holes 221 and 321 of the coupling part 220 and the head coupling part 320 communicate with each other so that the bolt 400 can be fastened to the nut 410, and the pile connection assembly can be easily performed. Construction of pile joints is possible.

In addition, the front end coupling portion 220 and the head coupling portion 320 according to each embodiment is welded to the front end cap 210 and the head cap 310, or integrated with the front end cap 210 and the head cap 310 It may be formed as.

In addition, the nut 410 is installed to be inserted into the through hole 221 as in each of the above embodiments, fixed to the outside of the through hole 221 by a welding method, or the through hole 221. It can be configured by forming a tab inside the).

Meanwhile, FIG. 14 is an exemplary view showing guide protrusions according to another embodiment of the present invention. As shown in the drawing, the guide protrusion 230 may be configured in the shape of a wedge having a sharp end to be easily inserted into the guide groove 330. Can be.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

(100): pile (200): tip bracket
(210): Tip cap (211): Reinforcement band
(212): bearing ring (213): steel bar
220: tip coupling portion 221: through hole
(230): guide protrusion (300): tofu bracket
(310): head cap (311): reinforcement band
(312): Supporting ring (313): Steel bar coupling hole
(320): head coupling portion 321: through hole
330; Guide groove (400): bolt
410: nut 500: steel bar

Claims (4)

  1. delete
  2. delete
  3. delete
  4. In the chimney and pile fitting device comprising a front end bracket which is installed at the front end of the hollow pile, and a head bracket which is installed on the head to be coupled to the front end bracket,
    The distal end bracket and the tofu bracket are formed in a symmetrical concave-convex shape and the distal end bracket and the tofu bracket are coupled to each other when the pile is connected.
    The distal end bracket is installed at the distal end of the pile and has a hollow inner end, and protruded to a predetermined height in a vertical direction at predetermined intervals along a central portion of the distal end cap, and a through hole having a long hole shape in the horizontal direction. Comprising a plurality of front end coupling portion and a guide protrusion formed protruding on the outer edge of the front end cap is formed in the shape of a pointed wedge so that the end can be positioned at the proper position when the front end bracket and the head bracket is coupled; ,
    The head bracket is installed on the head of the pile and the head cap is hollow inside, and formed so as to protrude to a certain height in the vertical direction perpendicular to the inner and outer edges of the head cap so that the tip coupling portion can be inserted and And a pair of head coupling portions having a plurality of through-holes formed therein, and guide grooves formed on top of the head coupling portions installed at outer edges thereof to correspond to the guide protrusions.
    Nuts installed in the through hole of the head coupling portion formed on the inner edge of the head bracket, through holes formed on the outer edge of the head coupling portion formed on the outer edge of the head bracket and through holes of the front end bracket and the inner edge of the head coupling portion. Is configured to be fastened by a bolt coupled to the nut of the formed through hole,
    The tip coupling portion and the head coupling portion of the concrete pile joint, characterized in that configured to be separated into at least three or more pieces.








KR1020100015301A 2010-02-19 2010-02-19 Coupling apparatus of concrete pile KR101174273B1 (en)

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Application Number Priority Date Filing Date Title
KR1020100015301A KR101174273B1 (en) 2010-02-19 2010-02-19 Coupling apparatus of concrete pile

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Application Number Priority Date Filing Date Title
KR1020100015301A KR101174273B1 (en) 2010-02-19 2010-02-19 Coupling apparatus of concrete pile

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KR20110095693A KR20110095693A (en) 2011-08-25
KR101174273B1 true KR101174273B1 (en) 2012-08-16

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190082005A (en) 2017-12-29 2019-07-09 창신대학교 산학협력단 Coupling Apparatus of PHC Pile

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101300499B1 (en) * 2013-01-11 2013-08-26 문종화 A connection device to connect concrete piles
KR101714371B1 (en) * 2016-05-20 2017-03-14 (주)성심씨앤엠 Joints Appartus of The Concrete Piles and Steel Pipe
KR101861920B1 (en) * 2016-06-20 2018-06-28 주식회사 에스비케이 Pile connector
KR200490635Y1 (en) 2017-10-20 2019-12-09 (주)성심씨앤엠 Connection Device For Ground Reinforced File
KR102086526B1 (en) * 2018-03-27 2020-03-09 아이에스동서(주) PHC pile connection device for non welded joint
CN110438982A (en) * 2019-08-12 2019-11-12 中国建筑第二工程局有限公司 A kind of pile end board and tubular pole connection method

Citations (3)

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Publication number Priority date Publication date Assignee Title
US20040047693A1 (en) 2002-09-06 2004-03-11 Atsushi Nishiwaki Joining structure of pile
KR100646258B1 (en) * 2005-10-24 2006-11-23 재단법인 포항산업과학연구원 Apparatus for connecting concrete piles
KR100835777B1 (en) * 2007-03-14 2008-06-05 정인배 Joint apparatus of concrete pile and steel pipe pile

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040047693A1 (en) 2002-09-06 2004-03-11 Atsushi Nishiwaki Joining structure of pile
KR100646258B1 (en) * 2005-10-24 2006-11-23 재단법인 포항산업과학연구원 Apparatus for connecting concrete piles
KR100835777B1 (en) * 2007-03-14 2008-06-05 정인배 Joint apparatus of concrete pile and steel pipe pile

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20190082005A (en) 2017-12-29 2019-07-09 창신대학교 산학협력단 Coupling Apparatus of PHC Pile

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