KR100869815B1 - Apparatus to upgrade end bearing capacity of pile and pile construction method - Google Patents

Apparatus to upgrade end bearing capacity of pile and pile construction method Download PDF

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KR100869815B1
KR100869815B1 KR1020070032966A KR20070032966A KR100869815B1 KR 100869815 B1 KR100869815 B1 KR 100869815B1 KR 1020070032966 A KR1020070032966 A KR 1020070032966A KR 20070032966 A KR20070032966 A KR 20070032966A KR 100869815 B1 KR100869815 B1 KR 100869815B1
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steel pipe
pile
fixed
concrete
tip
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KR1020070032966A
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Korean (ko)
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임수용
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임수용
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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
    • E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
    • E02D5/44—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with enlarged footing or enlargements at the bottom of the pile
    • 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
    • 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

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

Abstract

A steel pipe construction method is provided to strengthen the steel pipe by enlarging the front tip cross-section of steel pipe and increasing the coherence between front tip of steel pipe and concrete. An apparatus to strengthen bearing capacity of steel pipe(1) front tip(100) comprises a rib(110) fixed to the front tip outer side of the steel pipe, a donut-like extention board(120) fixed to the bottom of rib(120), a shear fixing member fixed to front tip inside of the steel pipe, a steel member fixed and supported by the shear fixing member. The steel pipe construction method comprises following steps: a step for forming the excavated hole it digs out the ground screw is used; a step for forming the concrete layer it applies the concrete in the bottom of inside of the excavated hole; a step for reclaiming to the concrete layer the tip-end part it inserts into the excavated hole the steel pipe in which the tip-end part supporting force enlarging apparatus is fixed; a step for filling to filler the head-space of the concrete layer.

Description

매입말뚝용 강관의 선단부 지지력 확대장치 및 매입말뚝 시공방법{Apparatus to upgrade end bearing capacity of pile and pile construction method}Apparatus to upgrade end bearing capacity of pile and pile construction method

도 1은 종래기술에 따라 매입말뚝을 시공하는 과정을 나타낸 도면.1 is a view showing a process for constructing a pile pile according to the prior art.

도 2는 본 발명에 따른 매입말뚝용 강관의 선단부 지지력 확대장치가 설치된 상태를 나타낸 사시도.Figure 2 is a perspective view showing a state in which the front end supporting force expanding device of the embedded pile steel pipes according to the present invention is installed.

도 3는 도 2의 A-A 선단면도.3 is a cross-sectional view taken along the line A-A of FIG.

도 4는 도 2 및 도 3에 도시된 강관의 선단부가 굴착공의 하부에 타설된 콘크리트층에 매립된 상태를 나타낸 단면도.Figure 4 is a cross-sectional view showing a state in which the distal end portion of the steel pipe shown in Figures 2 and 3 is embedded in the concrete layer placed in the lower portion of the excavation hole.

도 5는 본 발명에 따른 매입말뚝 시공방법에 의해 매입말뚝을 시공하는 과정을 나타낸 도면5 is a view showing a process for constructing the embedded pile by the embedded pile construction method according to the present invention

<도면의 주요부호에 대한 설명><Description of Major Symbols in Drawing>

100 : 선단부 지지력 확대장치 110 : 리브100: tip portion bearing expansion device 110: rib

120 : 확장판 130 : 전단고정부재120: expansion plate 130: shear fixing member

140 : 철근부재140: rebar member

본 발명은 매입말뚝용 강관의 선단부 지지력 확대장치 및 매입말뚝 시공방법에 관한 것으로, 더욱 상세하게는 강관 선단부의 단면적을 확대시켜 강관의 지지력을 증대시킴과 아울러 강관과 콘크리트의 결합력을 증대시키는 매입말뚝용 강관의 선단부 지지력 확대장치 및 매입말뚝 시공방법에 관한 것이다.The present invention relates to an expansion device for supporting the tip portion of a buried pile steel pipe and a method of constructing a buried pile, and more particularly, to increase the bearing capacity of the steel pipe by increasing the cross-sectional area of the steel pipe tip and to increase the bonding force between the steel pipe and the concrete. The present invention relates to a device for expanding the bearing capacity of the tip of a molten steel pipe and embedding pile construction.

일반적으로 교량(橋梁)의 교각(橋脚) 또는 교대(橋臺)등과 같은 토목 구조물의 시공시 그 구조물이 지반으로부터 충분한 지지력을 얻을 수 있도록 지중(地中)에 각종 말뚝을 관입시켜 지반의 지지력을 증대시킨다.In general, when constructing civil structures such as bridge bridges or bridges, bridges are built into the ground so that the structure can obtain sufficient support from the ground. Increase

이러한 역할을 하는 말뚝의 시공방법으로는 타입말뚝공법, 현장타설말뚝공법 및 매입말뚝공법 등이 있다.Construction methods of piles that play such a role include a type pile method, a site-placed pile method, and an embedded pile method.

이 때, 타입 말뚝공법은 강관을 타격하여 굴착하는 공법이고, 현장타설말뚝공법은 케이싱을 항타하여 근입시킨 후 케이싱 내로 굴착하고 케이싱 내에 콘크리트를 타설하여 현장에서 말뚝을 조성하는 공법이며, 매입말뚝공법은 미리 지반을 굴착한 후 강관말뚝을 매설하여 지지력을 확보토록 하는 공법이다.At this time, the type pile method is a method of hitting and drilling a steel pipe, the site-placement pile method is a method of forming a pile at the site by excavating into the casing and placing concrete in the casing after driving the casing to drive in. Is the method to secure the bearing capacity by laying the steel pipe pile after excavating the ground in advance.

전술한 말뚝의 시공방법중 매입말뚝공법에 의한 종래의 말뚝시공과정이 도 1에 도시되어 있다.The conventional pile construction process by the embedded pile construction method of the above-described pile construction method is shown in FIG.

도시된 바와 같이 종래의 매입말뚝 시공방법에 따르면, 먼저 스크류를 이용해 지반을 굴착한 후(a)(b), 굴착공의 최하부로부터 소정높이(통상 60㎝)까지 선단고정액(콘크리트 그라우트)를 채워 타설하며(c), 선단고정액층이 어느정도 양생되면 그 상측에 주면고정액(콘크리트 그라우트)를 채운 다음(d), 강관을 굴착공 내로 삽입하여 강관의 선단이 선단고정액층에 안착되도록(e)(f) 함으로써 매입말뚝의 시 공과정이 모두 완료된다.According to the conventional buried pile construction method as shown, first excavating the ground using a screw (a) (b), and then filling the tip fixing liquid (concrete grout) from the bottom of the excavation hole to a predetermined height (typically 60 cm) (C) When the tip fixed liquid layer is cured to some extent, fill the fixed liquid (concrete grout) on the upper side (d), and then insert the steel pipe into the excavation hole so that the tip of the steel pipe is seated on the tip fixed liquid layer (e) ( f) This completes the construction process of the purchase pile.

그러나 전술한 바와 같은 종래의 매입말뚝 시공방법의 경우에는 굴착공의 천공면적에 비해 강관의 단면적이 작기 때문에 측방향으로 작용하는 하중에 의한 선단부의 지지력이 약할 수 밖에 없다.However, in the case of the conventional embedded pile construction method as described above, since the cross-sectional area of the steel pipe is smaller than the drilling area of the excavation hole, the supporting force of the tip portion due to the load acting in the lateral direction is weak.

즉, 강관의 하단과 굴착공의 측벽 사이에 간극이 형성되어 있기 때문에 측방향으로 하중이 작용하는 경우 간극만큼 강관이 유동할 염려가 있다.That is, since a gap is formed between the lower end of the steel pipe and the side wall of the excavation hole, there is a concern that the steel pipe may flow as much as the gap when a load is applied in the lateral direction.

또한, 굴착공에 콘크리트를 주입하고 강관을 세워놓으므로써 서로 다른 특성을 갖는 두 재질이 결합되어야 하므로 결합력이 떨어지게 되며, 그에 따라 강관의 선단 지지력 또한 약해진다.In addition, the concrete is injected into the excavation hole and the steel pipes are erected so that the two materials having different characteristics must be combined, so that the bonding force is reduced, and thus the tip bearing capacity of the steel pipe is also weakened.

이에 본 발명은 전술한 바와 같은 종래의 제반 문제점을 해소하기 위하여 안출된 것으로, 강관의 선단부 단면적을 확대시킴으로써 강관의 지지력을 증대시킬 수 있는 매입말뚝용 강관의 선단부 지지력 확대장치 및 매입말뚝 시공방법을 제공하는데 그 목적이 있다.Accordingly, the present invention has been made in order to solve the conventional problems as described above, and to expand the end portion bearing capacity of the buried pile steel pipe that can increase the bearing capacity of the steel pipe by expanding the cross-sectional area of the end of the steel pipe and buried pile construction method The purpose is to provide.

또한, 본 발명은 강관의 선단부와 콘크리트와 결합력을 증대시켜 강관의 지지력을 증대시킬 수 있는 매입말뚝용 강관의 선단부 지지력 확대장치 및 매입말뚝 시공방법을 제공하는 목적도 있다.In addition, an object of the present invention is to provide a distal end portion bearing capacity expansion device and a buried pile construction method of the steel pipe for embedded piles to increase the bearing capacity of the steel pipe by increasing the bonding force with the front end portion of the steel pipe and concrete.

전술한 바와 같은 목적을 달성하기 위해 본 발명에 따른 매입말뚝용 강관의 선단부 지지력 확대장치는, 매입말뚝용 강관의 선단부 외측에 고정되는 리브, 리브 의 저면에 고정되는 도넛형의 확장판, 강관의 선단부 내측에 고정되는 전단고정부재, 및 강관의 선단부 내측에서 전단고정부재에 의해 고정 지지되는 철근부재를 포함하여 이루어진 것에 기술적 특징이 있다.In order to achieve the object as described above, the end portion bearing capacity expansion device of the embedded pile steel pipe according to the present invention, ribs fixed to the outside of the front end of the embedded pile steel pipe, donut type expansion plate fixed to the bottom of the ribs, the end of the steel pipe There is a technical feature that comprises a shear fixing member fixed to the inside, and a reinforcing member fixed by the shear fixing member inside the front end of the steel pipe.

전술한 구성에 있어서, 리브는 적어도 두 개 이상이 구비되며 강관에 대하여 방사상으로 고정된다.In the above-described configuration, at least two ribs are provided and are fixed radially with respect to the steel pipe.

전술한 구성에 있어서, 철근부재는 망의 형태를 이룬다.In the above configuration, the reinforcing member forms a net.

전술한 구성에 있어서, 전단고정부재의 형태는 ‘L’자형, ‘ㄷ’자형 및 볼트형 중 어느 하나이다.In the above-described configuration, the shape of the shear fixing member is any one of the 'L' shape, 'ㄷ' shape and bolt shape.

또한, 전술한 바와 같은 목적을 달성하기 위해 본 발명에 따른 매입말뚝용 강관의 선단부 지지력 확대장치가 적용된 매입말뚝 시공방법은, 스크류를 이용해 지반을 굴착하여 굴착공을 형성하는 단계, 굴착공의 내측 하부에 콘크리트를 타설하여 콘크리트층을 형성하는 단계, 선단부 지지력 확대장치가 고정된 강관을 굴착공에 삽입하고 그 선단부를 콘크리트층에 매립하는 단계, 및 콘크리트층의 상부 공간을 채움재로 채우는 단계를 포함하여 이루어진 것에 기술적 특징이 있다.In addition, in order to achieve the object described above, the buried pile construction method to which the tip portion bearing capacity expanding device of the buried pile steel pipe according to the present invention is applied, excavating the ground using a screw to form an excavation hole, the inner side of the excavated hole Forming concrete layer by placing concrete in the lower part, inserting a steel pipe fixed with a tip support capacity expansion device into an excavation hole and embedding the tip part in the concrete layer, and filling the upper space of the concrete layer with a filler There is a technical feature to what is done.

전술한 구성에 있어서, 채움재는 토사, 모래 및 콘크리트 중 어느 하나이다.In the above-described configuration, the filler is any one of soil, sand and concrete.

이하, 본 발명에 따른 매입말뚝용 강관의 선단부 지지력 확대장치 및 매입말뚝 시공방법의 바람직한 실시예를 통하여 전술한 바와 같은 구성들의 특징과 그 작용을 보다 상세히 설명하기로 한다.Hereinafter, the features and the operation of the components as described above will be described in more detail with reference to preferred embodiments of the distal end portion bearing capacity expansion device and the embedded pile construction method of the embedded pile steel pipe according to the present invention.

도 2 내지 도 4에 도시된 바와 같이, 본 발명에 따른 매입말뚝용 강관의 선단부 지지력 확대장치(100)는, 매입말뚝용 강관(1)의 선단부 외측에 고정되는 리브(110), 리브(110)의 저면에 고정되는 확장판(120), 강관(1)의 선단부 내측에 고정되는 전단고정부재(130), 및 전단고정부재(130)에 의해 고정되는 철근부재(140)를 포함하여 이루어진다.As shown in Figures 2 to 4, the tip portion supporting force expanding device 100 of the embedded pile steel pipe according to the present invention, ribs 110, ribs 110 is fixed to the outer end of the embedded pile steel pipe (1) Expansion plate 120 is fixed to the bottom of the), the shear fixing member 130 is fixed to the inside of the front end of the steel pipe (1), and the reinforcing member 140 is fixed by the shear fixing member (130).

전술한 리브(110)는 복수 개가 구비되어 강관(1)의 선단부 외측에 용접에 의해 고정되는 것으로, 강관(1)에 대하여 방사상으로 고정되며 그 저면이 강관(1)의 하단면과 일치된다.The rib 110 is provided with a plurality of ribs and fixed to the outside of the tip of the steel pipe 1 by welding. The rib 110 is fixed radially with respect to the steel pipe 1, and the bottom thereof coincides with the bottom surface of the steel pipe 1.

이러한 리브(110)는 강관(1)에 대하여 확장판(120)을 지지해주며, 매입말뚝 시공시 굴착공의 하부에 콘크리트가 타설되어 형성되는 콘크리트층에 매설된다.The rib 110 supports the expansion plate 120 with respect to the steel pipe (1), and is embedded in the concrete layer is formed by placing concrete in the lower portion of the excavation hole during the construction of the embedded pile.

전술한 확장판(120)은 도넛형의 원판으로서, 리브(110)의 저면에 용접에 의해 고정되며 그 내경이 강관의 내경과 일치하고 외경은 강관의 외경보다 크며 굴착공의 내경보다 미세한 차이로 작게 형성된다.The above-described expansion plate 120 is a donut-shaped disk, fixed to the bottom of the rib 110 by welding, the inner diameter of which matches the inner diameter of the steel pipe, the outer diameter is larger than the outer diameter of the steel pipe and smaller by a smaller difference than the inner diameter of the drilling hole. Is formed.

이처럼, 확장판(120)은 강관(1)의 선단부에 견고히 고정되고 그 외경이 강관의 외경보다 크게 형성됨으로써 강관의 선단부 직경을 확대시키는 역할을 한다.As such, the expansion plate 120 is firmly fixed to the front end of the steel pipe (1) and the outer diameter is formed larger than the outer diameter of the steel pipe serves to enlarge the diameter of the front end of the steel pipe.

따라서, 강관(1)을 굴착공에 삽입 시공할 때 강관(1)과 굴착공의 측벽 사이에 형성되는 간극이 확장판이 구비되어 있지 않은 종래의 강관과 굴착공의 측벽이 이루는 간극보다 작기 때문에 그만큼 강관의 선단부 지지력이 증대된다. Therefore, when the steel pipe 1 is inserted into the excavation hole, the gap formed between the steel pipe 1 and the side wall of the excavation hole is smaller than the gap formed between the conventional steel pipe without the expansion plate and the side wall of the excavation hole. The supporting capacity of the tip of the steel pipe is increased.

전술한 전단고정부재(130)는 강관(1)의 선단부 내측에 용접에 의해 고정되어 강관(1)에 대하여 철근부재(140)를 고정지지하는 것으로, ‘L’자 형태 또는 ‘ㄷ ’자 형태를 갖으며 이에 한정되지 않고 볼트형태(스터드볼트)를 갖을 수도 있다.The aforementioned shear fixing member 130 is fixed by welding to the inside of the tip end of the steel pipe 1 to support the rebar member 140 with respect to the steel pipe 1, 'L' shape or 'c' shape It is not limited thereto and may have a bolt shape (stud bolt).

전술한 철근부재(140)는 망의 형태를 이루는 것으로, 강관(1)의 형태에 맞게 원형관 형태의 망으로 형성될 수도 있고, 강관(1)의 선단부 내측을 가로지르는 판상의 망으로 형성될 수도 있으며, 이에 한정되지 않고 강관(1)의 선단부 내측을 십자형의 망으로 형성될 수도 있다.The reinforcing member 140 is formed in the form of a net, and may be formed in a net of a circular tube shape in accordance with the shape of the steel pipe 1, or may be formed of a plate-shaped net crossing the inner end of the steel pipe 1. Alternatively, the present invention is not limited thereto, and the inside of the tip portion of the steel pipe 1 may be formed in a cross-shaped net.

이 때, 철근부재(140)는 미도시된 와이어를 이용해 전단고정부재(130)에 견고히 고정된다.At this time, the rebar member 140 is firmly fixed to the shear fixing member 130 using a wire not shown.

이러한 철근부재(140)는 매입말뚝 시공시 강관(1)의 하단이 콘크리트층에 매립되어 콘크리트가 강관(1)의 하단부 내로 삽입될 때 콘크리트와 일체화됨으로써 콘크리트와 강관의 결합력을 증대시키는 역할을 한다.The reinforcing member 140 serves to increase the bonding force between the concrete and the steel pipe by being integrated with the concrete when the bottom of the steel pipe (1) is embedded in the concrete layer when the embedded pile is inserted into the bottom of the steel pipe (1). .

이하에서는 전술한 바와 같이 구성된 본 발명에 따른 선단부 지지력 확대장치가 적용된 강관을 이용해 매입말뚝을 시공하는 과정을 도 5를 참조로 설명하기로 한다.Hereinafter, a process of constructing the embedded pile by using the steel pipe to which the tip portion supporting force expanding device according to the present invention configured as described above is applied will be described with reference to FIG. 5.

먼저, 스크류(2)를 이용해 지반을 굴착하여 굴착공(3)을 형성한다.(a)First, the ground is excavated using the screw (2) to form an excavation hole (a).

그리고 나서 굴착공(3)의 하부에 콘크리트를 소정높이(통상 60㎝)까지 타설하여 콘크리트층(4)을 형성한다.(b)Then, concrete is poured in the lower part of the excavation hole 3 to a predetermined height (typically 60 cm) to form the concrete layer 4 (b).

이어서 본 발명에 따른 선단부 지지력 확대장치(100)가 고정된 강관(1)을 굴착공(3) 내로 삽입한 후 그 선단이 콘크리트층(4)에 매립되도록 한다.(c)Subsequently, after inserting the fixed steel pipe 1 into the excavation hole 3, the distal end supporting force expanding apparatus 100 according to the present invention is embedded in the concrete layer 4 (c).

이 때, 강관(1)의 선단부에 고정된 리브(110), 확장판(120), 전단고정부 재(130) 및 철근부재(140)도 콘크리트층(4)에 완전 매립되며 콘크리트층(4)의 콘크리트가 양생됨에 따라 콘크리트와 일체화된다.At this time, the rib 110, the expansion plate 120, the shear fixing member 130 and the reinforcing member 140 fixed to the distal end of the steel pipe (1) is also completely embedded in the concrete layer (4) and the concrete layer (4) As concrete is cured, it is integrated with concrete.

그리고, 강관(1)의 선단 저면에 고정되는 확장판(120)의 외경은 굴착공(3)의 직경보다 미세한 차이로 작게 형성됨으로써, 강관(1)의 선단부 유동이 방지된다.In addition, the outer diameter of the expansion plate 120 fixed to the bottom of the front end of the steel pipe 1 is formed with a smaller difference than the diameter of the excavation hole (3), thereby preventing the flow of the front end of the steel pipe (1).

즉, 강관(1)에 대하여 측방향으로의 하중이 작용하더라도 강관(1)이 기울어지지 않는다.That is, the steel pipe 1 does not incline even if a load in the lateral direction is applied to the steel pipe 1.

또한, 강관(1)의 선단부 내에 콘크리트가 유입되어 양생되면서 철근부재(140)와 큰크리트가 일체화됨으로써, 종래에서와 같이 단순히 강관과 콘트리트만이 결합될 때보다 철근부재(140)로 인해 강관과 콘크리트 사이의 결합력이 더 증대된다.In addition, the concrete is introduced into the front end portion of the steel pipe (1), and the reinforcing member 140 and the large concrete is integrated, so that the steel pipe and the steel pipe due to the reinforcing member 140 than when only the steel pipe and the concrete is combined as conventionally The bonding force between the concrete is further increased.

강관(1)의 설치가 완료되면, 콘크리트층(4)의 상부공간으로 굴착공(3) 시공시 파낸 토사나 모래 또는 콘크리트 등의 채움재(5)가 채워짐으로써 매입말뚝의 시공이 모두 완료된다.(d)When the installation of the steel pipe (1) is completed, the construction of the embedded pile is completed by filling the filling material (5), such as earth and sand or sand or concrete dug during the construction of the excavation hole (3) to the upper space of the concrete layer (4). (d)

이 때, 토사 또는 모래로 채우게 되면 콘크리트로 채우는 것보다 시공비용을 절감할 수 있으며, 채움재(5)로 콘크리트를 사용하는 경우에는 안전성이 증대된다. 채움재(5)를 토사 또는 모래를 사용하는 경우 강관(1)의 선단부에 고정되는 선단부 지지력 확대장치(100)에 의해 강관(1)의 지지력이 확보된 상태이므로 강관(1)의 지지력에는 문제가 없다.At this time, if the filling with soil or sand can reduce the construction cost than filling with concrete, when using the concrete as the filler 5 is increased safety. When the filling material 5 uses soil or sand, since the bearing capacity of the steel pipe 1 is secured by the tip bearing capacity expanding device 100 fixed to the tip of the steel pipe 1, there is a problem in the bearing capacity of the steel pipe 1. none.

이상과 같이 본 발명의 바람직한 실시예에 따른 매입말뚝용 강관의 선단부 지지력 확대장치 및 매입말뚝의 시공방법을 첨부된 도면을 참조로 설명하였으나, 본 발명은 본 명세서에 상세히 설명된 실시예와 도면에 한정되지 아니하며, 발명의 기술사상 범위 내에서 다양한 변형이 이루어질 수 있다.
예컨대, 본 발명에 따른 강관대신 H빔을 사용할 수도 있으며, 이 경우 H빔의 양쪽홈에 전단고정부재 및 철근부재가 설치된다. 이러한 실시예 역시 본 발명의 권리범위에 포함되는 것으로 보아야 한다.As described above with reference to the accompanying drawings, but the construction method of the tip portion bearing capacity expanding device and the embedded pile of the steel pile for embedded pile according to a preferred embodiment of the present invention, the present invention is described in detail in the embodiments and drawings Without being limited, various modifications may be made within the technical spirit of the invention.
For example, an H beam may be used instead of the steel pipe according to the present invention. In this case, a shear fixing member and a rebar member are installed in both grooves of the H beam. Such embodiments should also be considered to be included within the scope of the invention.

전술한 바와 같이 구성된 본 발명 매입말뚝용 강관의 선단부 지지력 확대장치 및 매입말뚝의 시공방법에 따르면, 강관의 하단부에 고정되는 리브와 확장판을 이용해 강관의 선단부 단면적을 확대시킴으로써, 강관과 굴착공의 측벽 사이의 간극이 좁아져 강관의 선단부 지지력이 증대된다.According to the construction method of the end portion bearing capacity expansion device of the present invention embedded pile steel pipe configured as described above and the embedded pile, by using the rib and expansion plate fixed to the lower end of the steel pipe to enlarge the cross-sectional area of the end of the steel pipe, the side wall of the steel pipe and the excavation hole The gap between them is narrowed to increase the bearing capacity of the tip of the steel pipe.

또한, 본 발명은 강관의 선단부 내측에 전단고정부재를 고정하고 이 전단고정부재에 철근부재를 고정함으로써, 강관의 선단부를 굴착공 하부에 타설된 콘크리트층에 매립할 때 콘크리트가 강관의 선단부 내로 유입되어 철근부재와 일체화된다. 따라서, 콘크리트와 강관의 결합력이 증가하게 되고 그에 따라 강관의 선단부 지지력이 증대된다.
한편, 본 발명에 따르면 종래에 비해 강관의 직경이 작아지므로 강관의 제작비용이 줄어들며, 전체적으로 매입말뚝의 시공비용을 절감할 수 있다.In addition, the present invention by fixing the shear fixing member to the inside of the front end of the steel pipe and the reinforcing member fixed to the shear fixing member, the concrete flows into the tip of the steel pipe when the tip of the steel pipe is embedded in the concrete layer placed in the lower excavation hole It is integrated with the rebar member. Therefore, the coupling force between the concrete and the steel pipe is increased, thereby increasing the bearing capacity of the tip of the steel pipe.
On the other hand, according to the present invention, since the diameter of the steel pipe is smaller than the conventional, the manufacturing cost of the steel pipe is reduced, it is possible to reduce the construction cost of the embedded pile as a whole.

Claims (6)

매입말뚝용 강관(1)의 선단부 외측에 고정되는 리브(110)와, 상기 리브(110)의 저면에 고정되는 도넛형의 확장판(120)과, 상기 강관(1)의 선단부 내측에 고정되는 전단고정부재(130) 및, 상기 강관(1)의 선단부 내측에서 상기 전단고정부재(130)에 의해 고정 지지되는 철근부재(140)를 포함하여 이루어진 매입말뚝용 강관의 선단부 지지력 확대장치에 있어서,Rib 110 is fixed to the outer end of the embedded pile steel pipe (1), the donut-shaped expansion plate 120 is fixed to the bottom of the rib 110, and shear fixed to the inner end of the steel pipe (1) In the front end supporting force expanding device of the steel pipe for embedded piles comprising a fixing member 130 and a reinforcing member 140 fixedly supported by the shear fixing member 130 inside the front end of the steel pipe (1), 상기 리브(110)는 적어도 두 개 이상이 구비되며 강관(1)에 대하여 방사상으로 고정되고, 상기 전단고정부재(130)의 형태는 ‘L’자형, ‘ㄷ’자형 및 볼트형 중 어느 하나인 것을 특징으로 하는 매입말뚝용 강관의 선단부 지지력 확대장치.The rib 110 is provided with at least two or more and is fixed radially with respect to the steel pipe (1), the shape of the shear fixing member 130 is any one of the 'L' shape, 'c' shape and bolt type End portion support capacity expansion device of the steel pipe for the embedded pile. 삭제delete 삭제delete 삭제delete 삭제delete 삭제delete
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WO2011059145A1 (en) * 2009-11-12 2011-05-19 Lim Cheol Structure using steel pile
KR200459851Y1 (en) * 2009-11-12 2012-04-19 주식회사 스페이스테크놀로지 Bridge construction structure using steel pipe pile and composition beam for bicycle only
KR101136945B1 (en) 2010-01-27 2012-04-19 주식회사 스페이스테크놀로지 An earthquake-proof house and building
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KR101226138B1 (en) * 2011-01-24 2013-01-28 이창남 Pile foundation without column footing and its construction method
KR101507113B1 (en) * 2013-12-20 2015-03-30 삼보이엔씨 주식회사 Construction method of large diameter pile in water and guide structure for the same
KR20160117524A (en) * 2014-03-19 2016-10-10 아사히 가세이 겐자이 가부시키가이샤 Spiral shaped blade-equipped steel pipe pile, composite pile, and composite pile creation method
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KR102133163B1 (en) * 2014-03-19 2020-07-13 아사히 가세이 겐자이 가부시키가이샤 Spiral shaped blade-equipped steel pipe pile, composite pile, and composite pile creation method
CN107130591A (en) * 2016-02-26 2017-09-05 中国二十冶集团有限公司 Deep basal pit soft soil foundation steel pile casting manual digging pile construction method
CN107130591B (en) * 2016-02-26 2019-07-30 中国二十冶集团有限公司 Deep basal pit soft soil foundation steel pile casting manual digging pile construction method
KR20180091494A (en) 2017-02-07 2018-08-16 유진지오 주식회사 Bored pile with improved end bearing capacity
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KR101997130B1 (en) 2019-01-31 2019-07-08 주식회사 스페이스테크놀로지 Steel pipe pile with end enlargement unit and pile method for improving earthquake-proof performance using the same

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