KR20100076399A - Metal tubing picket with reinforced tip - Google Patents

Metal tubing picket with reinforced tip Download PDF

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Publication number
KR20100076399A
KR20100076399A KR1020080134425A KR20080134425A KR20100076399A KR 20100076399 A KR20100076399 A KR 20100076399A KR 1020080134425 A KR1020080134425 A KR 1020080134425A KR 20080134425 A KR20080134425 A KR 20080134425A KR 20100076399 A KR20100076399 A KR 20100076399A
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South Korea
Prior art keywords
steel pipe
pipe pile
main
tip
end portion
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KR1020080134425A
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Korean (ko)
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조우연
이용주
나승민
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주식회사 포스코
재단법인 포항산업과학연구원
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Priority to KR1020080134425A priority Critical patent/KR20100076399A/en
Publication of KR20100076399A publication Critical patent/KR20100076399A/en

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/24—Prefabricated piles
    • E02D5/28—Prefabricated piles made of steel or other metals
    • E02D5/285—Prefabricated piles made of steel or other metals tubular, e.g. prefabricated from sheet pile elements
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/54—Piles with prefabricated supports or anchoring parts; Anchoring piles
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/30—Columns; Pillars; Struts
    • E04C3/32—Columns; Pillars; Struts of metal

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Architecture (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Piles And Underground Anchors (AREA)

Abstract

PURPOSE: A steel pipe pile whose tip-end part is reinforced is provided to increase the supporting force and occlusion effect by mounting reinforcing materials around a main pipe. CONSTITUTION: A steel pipe pile whose tip-end part comprises a main pipe(10), an outer pipe(20) and a reinforcing material(30). The outer pipe clusters around main. The main pipe interlinks the outer pipe and the reinforcing material.

Description

선단부가 보강된 강관말뚝{ METAL TUBING PICKET WITH REINFORCED TIP}Steel pipe pile with reinforced tip {METAL TUBING PICKET WITH REINFORCED TIP}

본 발명은 선단부가 보강된 강관말뚝에 관한 것으로서, 보다 상세하게는 본관의 선단부에 보강재를 매개로 본관을 둘러싸는 외측관을 결합하여 강관말뚝의 지지력을 향상하고 폐색효과를 증진한 선단부가 보강된 강관말뚝에 관한 것이다.The present invention relates to a steel pipe pile reinforced with a tip portion, and more specifically, by combining an outer tube surrounding the main tube with a reinforcing material at the front end portion of the main tube to improve the bearing capacity of the steel pipe pile and enhance the closing effect. It is about the steel pipe pile.

최근 들어 공공시설물 및 항만시설등 건축물을 건설함에 있어서, 구조물의 수직 및 수평변위에 대한 조건이 엄격해짐에 따라, 이러한 조건들을 만족시키기 위해 구조물의 기초 형식으로 지지층에서 근입깊이를 크게 할 수 있고, 연직하중과 수평하중에 대한 저항이 큰 강관말뚝이 널리 이용되고 있다.In recent years, in the construction of buildings such as public facilities and harbor facilities, as the conditions for vertical and horizontal displacement of the structure become stricter, in order to satisfy these conditions, it is possible to increase the depth of incidence in the supporting layer as a basic form of the structure. Steel pipe piles with high resistance to vertical and horizontal loads are widely used.

건축물 시공시 지반을 다지는 지정작업시 작업자는 강관말뚝을 상부로부터 항타하여 강관말뚝 상부로부터 선단부를 통해 지하 암반에 하중을 전달한다. 이러한 하중이 전달되는 강관말뚝의 선단부는 일정 수준의 지지력이 갖추어지도록 설계되어야 한다. 이러한 지지력은 선단지지력과 주면마찰력으로 구분될 수 있다. 강관말뚝의 선단부가 지하 암반에 의해 지지되는 힘을 의미하는 선단지지력은 강관말뚝이 지하 암반에 접촉되는 면적이 클수록 증가한다. 또한, 강관말뚝이 지반에 매입되는 경우 강관말뚝의 외주면인 측면에서 주위 토사층과의 접촉에 의해 발생되는 주면마찰력은 강관말뚝의 관입깊이에 따라 변화된다.In the designation work to lay the ground during construction, the worker drives the steel pipe pile from the top to transfer the load from the top of the steel pipe pile to the underground rock through the tip. The tip of the steel pipe pile to which these loads are to be transmitted is to be designed to have a certain level of bearing capacity. This support can be divided into tip support and principal friction. The tip bearing capacity, which means that the tip of the steel pipe pile is supported by the underground rock, increases as the area where the steel pipe pile contacts the underground rock. In addition, when the steel pipe pile is embedded in the ground, the principal surface friction generated by contact with the surrounding soil layer on the outer peripheral surface of the steel pipe pile is changed according to the penetration depth of the steel pipe pile.

이러한, 강관말뚝의 선단지지력 및 주면마찰력과 함께 강관말뚝의 지지력에 영향을 미치는 요소가 폐색효과이다. 폐색효과는 선단부가 개방된 개단(開端)말뚝에 있어서, 관내로 유입되는 관내토(管內土)에 의해 발생된다. 관내토에 의한 말뚝의 폐색정도는 관내토의 상태와 말뚝의 관입깊이에 대응하는 관내토의 길이 등을 고려하여 완전개방(unplugged)과 부분폐색(partial plugged), 완전폐색(plugged)의 세단계로 구분된다. 이러한 폐색효과는 지반의 종류와 상태에 따라서 달라질 수 있지만, 개단말뚝을 관입할 때 일반적으로 지지력에 영향을 미치는 요소로 작용된다.A factor influencing the bearing capacity of the steel pipe pile together with the tip bearing capacity and the principal friction of the steel pipe pile is the blockage effect. The occlusion effect is caused by the inflow pipe inside the pipe at the open end with the tip open. The degree of blockage by piles is divided into three stages: unplugged, partial plugged, and fully plugged, taking into consideration the condition of the soil and the length of the pile corresponding to the depth of penetration of the pile. do. These occlusion effects may vary depending on the type and condition of the ground, but generally act as a factor that affects the bearing capacity when injecting open piles.

본 발명은 상기한 강관말뚝의 지지력을 향상하기 위해 본관의 주위에 보강재를 매개로 외측관을 설치하여 선단부가 보강된 강관말뚝을 제공하는데 그 목적이 있다. The present invention has an object to provide a steel pipe pile reinforced with a front end by installing an outer tube through the reinforcement material around the main pipe to improve the bearing capacity of the steel pipe pile.

이러한 목적을 달성하기 위한 본 발명에 따른 선단부가 보강된 강관말뚝은 중앙이 통공되고 지반에 매입되는 선단부가 개방된 본관; 상기 선단부의 외주면을 에워쌀 수 있도록 상기 본관의 선단부의 내경보다 큰 내경을 갖도록 형성된 외측관; 상기 본관의 선단부와 상기 외측관 사이에 형성된 간격에 설치되어 상기 본관과 외측관을 연결하는 보강재를 포함한다.Steel pipe piles reinforced with a front end portion according to the present invention for achieving this object is the main tube is open through the center and the front end is embedded in the ground; An outer tube formed to have an inner diameter larger than an inner diameter of the distal end portion of the main tube so as to surround the outer peripheral surface of the distal end portion; And a reinforcing material installed at a gap formed between the front end of the main tube and the outer tube to connect the main tube and the outer tube.

보강재는 상기 본관과 외측관 사이에 수직 방향으로 용접 설치된 플레이트인 것을 특징으로 한다.The reinforcing material is a plate welded in a vertical direction between the main pipe and the outer pipe.

플레이트로 설치된 상기 보강재의 상하단은 각각 상기 본관과 경사지게 설치된 것을 특징으로 한다.The upper and lower ends of the reinforcing material provided with a plate is characterized in that the main building is inclined.

본 발명은 상기한 기술적 구성으로 인해 강관말뚝 선단부의 유효단면적의 증가로 선단지지력은 물론 주면마찰력이 개선되고. 강관말뚝 매입시 유입되는 관입토에 의하여 폐색효과가 증진되어 강관말뚝의 지지력이 향상된다. 나아가, 선단부에 만 외측관을 설치하여 원가가 절감된다.The present invention is improved by the above-described technical configuration, the effective bearing area of the end of the steel pipe pile, the end support force as well as the principal surface friction. The occlusion effect is enhanced by the inflow soil when the steel pipe pile is purchased, and the bearing capacity of the steel pipe pile is improved. Furthermore, cost is reduced by installing the outer tube only at the tip.

이하에서는 첨부된 도면을 참조하여 본 발명에 따른 선단부가 보강된 강관말뚝의 일 실시예를 살펴본다.Hereinafter, with reference to the accompanying drawings looks at an embodiment of the end of the steel pipe pile reinforced with the present invention.

도 1에 도시된 바와 같이, 본 발명에 따른 선단부가 보강된 강관말뚝은 본관(10), 이러한 본관(10)을 에워싸고 있는 외측관(20) 및 본관(10)과 외측관(20)을 연결하며 고정하는 보강재(30)를 포함한다.As shown in Figure 1, the steel pipe pile reinforced with a tip end according to the present invention is the main tube 10, the outer tube 20 and the main tube 10 and the outer tube 20 surrounding the main tube (10) It includes a reinforcement 30 for connecting and fixing.

도 2에 도시된 바와 같이, 본관(10)은 지반에 매입되는 선단부(12)를 갖는다. 본관(10)의 선단부(12)는 개방된다. 이러한 본관(10)의 선단부(12)는 지하 암반에 의해 지지되는데 본관(10)의 선단부(12)가 지하 암반에 접촉되어 지지되는 단면적은 전체적인 강관말뚝의 선단지지력과 밀접한 관계를 갖는다. 즉, 접촉되어 지지되는 단면적이 클수록 전체적인 유효단면적은 증가하고 선단지지력도 개선된다. 따라서, 이러한 선단지지력의 향상을 위해 본관(10)의 선단부(12)의 주위에는 외측관(20)이 에워싼다. 이러한 외측관(20)의 단면 형상은 본관(10)과 동심(同心)을 이루는 원형이면서 그 직경이 본관(10)의 직경보다 큰 형상이다. 이러한 외측관(20)의 설치에 의해 강관말뚝이 지하 암반에 지지되는 유효단면적이 증가되고, 전체적으로 선단지지력이 향상될 수 있다. 이러한 외측관(20)은 본관(10)의 선단부(12)에만 설치되기 때문에, 재료비 감소에 따른 원가 절감의 효과를 거둘 수 있다.As shown in FIG. 2, the main building 10 has a tip portion 12 embedded in the ground. The tip portion 12 of the main building 10 is opened. The tip portion 12 of the main tube 10 is supported by the underground rock, but the cross-sectional area of the tip portion 12 of the main tube 10 in contact with the basement rock has a close relationship with the tip bearing force of the entire steel pipe pile. That is, the larger the cross-sectional area supported in contact with, the overall effective cross-sectional area increases and the tip bearing force also improves. Therefore, the outer tube 20 is enclosed around the distal end portion 12 of the main tube 10 to improve the tip bearing force. The cross-sectional shape of the outer tube 20 is a circular shape concentric with the main tube 10 and its diameter is larger than the diameter of the main tube 10. By the installation of the outer tube 20, the effective cross-sectional area in which the steel pipe pile is supported on the underground rock can be increased, and the overall support force can be improved. Since the outer tube 20 is installed only on the front end portion 12 of the main tube 10, the cost of the material can be reduced by reducing the material cost.

이러한 본관(10)과 외측관(20)의 단면은 동심원 형상을 가진다. 본관(10)의 내경(A)은 외측관의 내경(A')보다 작고, 본관(10)의 외주면에서 소정 간격 이격되 어 외측관(20)이 형성된다. 이러한 본관(10)과 외측관(20)은 보강재(30)를 매개로 연결된다. 이러한 보강재(30)는 본관(10) 및 외측관(20)에 각각 작용되는 강관말뚝 상부로부터의 수직 하중을 분배하는 기능은 물론, 보강재(30)가 갖는 유효단면적은 강관말뚝의 선단지지력을 향상한다.The cross section of the main tube 10 and the outer tube 20 has a concentric shape. The inner diameter A of the main tube 10 is smaller than the inner diameter A 'of the outer tube, and is spaced apart from the outer peripheral surface of the main tube 10 by a predetermined interval to form the outer tube 20. The main tube 10 and the outer tube 20 is connected via the reinforcing material (30). This reinforcement 30 has a function of distributing vertical load from the upper part of the steel pipe pile acting on the main pipe 10 and the outer pipe 20, as well as the effective cross-sectional area of the reinforcement 30 improves the tip bearing capacity of the steel pipe pile do.

한편, 본관(10)의 개방된 선단부(12) 및, 본관(10)과 외측관(20) 사이에 형성된 공간으로는 강관말뚝 시공시 지반의 토사층이 유입된다. 이러한 유입된 토사인 관입토는 강관말뚝의 주면마찰력은 물론 강관말뚝 매입시 발생되는 폐색효과를 향상한다. 즉, 강관말뚝의 최종 항타시 유입되는 관입토와 강관말뚝 매입시에 주변에 발생되는 토사들이 상기한 공간에 채워질 수 있기 때문에 주면마찰력 및 폐색효과가 향상된다.On the other hand, the soil layer of the ground during the steel pipe pile construction flows into the open front end portion 12 of the main pipe 10 and the space formed between the main pipe 10 and the outer pipe 20. The infiltrated soil infiltrate improves the occlusion effect of the steel pipe pile as well as the principal surface friction of the steel pipe pile. In other words, the frictional surface and the occlusion effect are improved because the infiltration soil introduced during the final driving of the steel pipe pile and the soils generated during the purchase of the steel pipe pile can be filled in the space.

보강재(30)는 플레이트 형상인 것이 바람직하다. 플레이트 형상의 보강재(30)는 지반과의 접촉 면적을 최대화하여 유효단면적이 최대가 될 수 있도록 형성될 수 있다. 또한, 이러한 보강재(30)는 본관(10)과 외측관(20) 사이에 형성된 공간을 원주 방향으로 분할할 수 있도록 수직 방향으로 설치될 수 있다. 즉, 보강재(30)가 수직 방향으로 설치된 플레이트라면 그러한 수직플레이트가 지하 암반과 접촉되는 면적에 의해 전체적인 유효단면적이 증가됨은 물론, 본관(10)과 외측관(20) 및 플레이트에 의해 구획된 공간에 유입되는 관입토에 의해 주면마찰력 및 폐색효과가 개선된다.The reinforcing material 30 is preferably plate-shaped. Plate-shaped reinforcement 30 may be formed to maximize the effective area by maximizing the contact area with the ground. In addition, the reinforcing material 30 may be installed in the vertical direction to divide the space formed between the main pipe 10 and the outer pipe 20 in the circumferential direction. That is, if the reinforcing material 30 is a plate installed in the vertical direction, the overall effective cross-sectional area is increased by the area where the vertical plate is in contact with the underground rock, as well as the space partitioned by the main pipe 10 and the outer pipe 20 and the plate. The penetration of soil into the soil improves principal friction and occlusion.

보강재(30)가 수직 방향 플레이트로 설치되는 경우, 이러한 플레이트의 상하단은 설계 요소를 고려하여 일정한 경사를 줄 수 있고, 플레이트의 개수 또한 설계 요소를 고려하여 조절될 수 있다. 즉, 점선으로 표시된 바와 같이, 플레이트의 상단 또는 하단을 본관에 대하여 경사지게 설치함으로써 강관말뚝 매입시 플레이트가 받는 응력을 줄일 수 있다.When the reinforcement 30 is installed as a vertical plate, the upper and lower ends of the plate may give a constant slope in consideration of design elements, and the number of plates may also be adjusted in consideration of design elements. That is, as indicated by the dotted line, by installing the top or bottom of the plate inclined with respect to the main pipe can reduce the stress received by the plate when the steel pipe pile embedded.

도 1은 본 발명에 따른 선단부가 보강된 강관말뚝의 평면도;1 is a plan view of a steel pipe pile reinforced with a front end portion according to the present invention;

도 2는 본 발명에 따른 선단부가 보강된 강관말뚝의 개략도이다.Figure 2 is a schematic diagram of a steel pipe pile reinforced with a tip portion according to the present invention.

※도면의 주요부분에 대한 부호의 설명※[Description of Reference Numerals]

10: 본관 12: 선단부 10: main building 12: distal end

20: 외측관 30: 보강재20: outer tube 30: reinforcing material

Claims (3)

중앙이 통공되고 지반에 매입되는 선단부(12)는 개방된 본관(10);The front end portion (12) through which the center is perforated and embedded in the ground is opened; 상기 선단부(12)의 외주면을 에워쌀 수 있도록 상기 본관(10)의 선단부(12)의 내경(A)보다 큰 내경(A')을 갖도록 형성된 외측관(20);An outer tube 20 formed to have an inner diameter A 'larger than an inner diameter A' of the distal end portion 12 of the main tube 10 so as to surround the outer circumferential surface of the distal end portion 12; 상기 본관(10)의 선단부(12)와 상기 외측관(20) 사이에 형성된 간격에 설치되어 상기 본관(10)과 외측관(20)을 서로 연결하는 보강재(30)를 포함하는 선단부가 보강된 강관말뚝.The front end portion is provided in the gap formed between the front end portion 12 and the outer tube 20 of the main tube 10 and the front end portion including a reinforcing material 30 for connecting the main tube 10 and the outer tube 20 to each other Steel pipe pile. 청구항 1에 있어서, 상기 보강재(30)는 상기 본관(10)과 외측관 사이에 수직 방향으로 설치된 플레이트인 것을 특징으로 하는 선단부가 보강된 강관말뚝.The steel pipe pile of claim 1, wherein the reinforcing material is a plate installed in a vertical direction between the main pipe 10 and the outer pipe. 청구항 2에 있어서, 플레이트로 설치된 상기 보강재(30)의 상하단은 각각 상기 본관(10)과 경사지게 설치된 것을 특징으로 하는 선단부가 보강된 강관말뚝.The steel pipe pile of claim 2, wherein the upper and lower ends of the reinforcing material 30 installed as a plate are inclined with the main pipe 10, respectively.
KR1020080134425A 2008-12-26 2008-12-26 Metal tubing picket with reinforced tip KR20100076399A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101353956B1 (en) * 2013-06-20 2014-01-23 김승한 Waterproof plate and construction methode for underground watertight wall using thereof
KR101488971B1 (en) * 2011-12-19 2015-02-02 (주)아리터 Supporting pile with double steel pipe and construction method thereof
KR20160102816A (en) 2015-02-23 2016-08-31 인천대학교 산학협력단 Steel pipe pile for small horizontal displacement
KR20160102818A (en) 2015-02-23 2016-08-31 인천대학교 산학협력단 Separable steel pipe pile for small horizontal displacement

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101488971B1 (en) * 2011-12-19 2015-02-02 (주)아리터 Supporting pile with double steel pipe and construction method thereof
KR101353956B1 (en) * 2013-06-20 2014-01-23 김승한 Waterproof plate and construction methode for underground watertight wall using thereof
KR20160102816A (en) 2015-02-23 2016-08-31 인천대학교 산학협력단 Steel pipe pile for small horizontal displacement
KR20160102818A (en) 2015-02-23 2016-08-31 인천대학교 산학협력단 Separable steel pipe pile for small horizontal displacement

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