KR102162467B1 - Thrust pile with prestress and self-supporting type pile construction using it - Google Patents

Thrust pile with prestress and self-supporting type pile construction using it Download PDF

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KR102162467B1
KR102162467B1 KR1020190175579A KR20190175579A KR102162467B1 KR 102162467 B1 KR102162467 B1 KR 102162467B1 KR 1020190175579 A KR1020190175579 A KR 1020190175579A KR 20190175579 A KR20190175579 A KR 20190175579A KR 102162467 B1 KR102162467 B1 KR 102162467B1
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South Korea
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plate
hanging
prestress
pile
thumb pile
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KR1020190175579A
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Korean (ko)
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김계식
오용환
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(주)토네이도건설
김계식
(주)신화피에스이앤씨
오용환
현대건설주식회사
주식회사 제일엔지니어링종합건축사사무소
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/02—Foundation pits
    • E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/06—Foundation trenches ditches or narrow shafts
    • E02D17/08—Bordering or stiffening the sides of ditches trenches or narrow shafts for foundations
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2250/00—Production methods
    • E02D2250/0046—Production methods using prestressing techniques
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2600/00—Miscellaneous
    • E02D2600/20—Miscellaneous comprising details of connection between elements

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

Abstract

The present invention is to provide an H-pile introduced with a prestress, which introduces a prestress beam self-supporting constructing method for installing a hanging type bracket on a retaining wall H-pile, installing a tension material to the hanging type bracket, and applying a tensible force to the tension material to support an earth pressure such that the number of installation of struts is remarkably reduced to secure a wide working space so as to reduce a construction period due to an increase in equipment work efficiency and reduce construction costs and improve constructability due to reduction in the usage of a steel material; and to a method for constructing a self-supporting type temporary retaining wall using the same. To this end, the H-pile introduced with a prestress comprises: an H-pile including an H-beam having a predetermined length; hanging type brackets coupled at a predetermined position of the H-pile to face each other; and a tension material fixed vertically between the hanging type brackets. In addition, the method of the present invention comprises: a step (S1) of manufacturing an H-pile introduced with a prestress; a step (S2) of forming a perforated hole by perforating the ground at regular intervals to have a predetermined diameter by a predetermined depth; a step (S3) of driving the H-pile introduced with the prestress to be embedded in the perforated hole; a step (S4) of tensioning a tension material installed in the H-pile introduced with the prestress; and a step (S5) of installing an earth plate while a front surface part of the H-pile introduced with the prestress is excavated.

Description

프리스트레스가 도입된 엄지말뚝과 이를 이용한 자립식 가설 흙막이 시공방법{Thrust pile with prestress and self-supporting type pile construction using it}Thumb pile with prestress and self-supporting type pile construction using it}

본 발명은 프리스트레스가 도입된 엄지말뚝과 이를 이용한 자립식 가설 흙막이 시공방법에 관한 것으로, 특히 자립식 흙막이 벽체에 발생하는 휨응력을 감소시키기 위해 인장재에 사전에 긴장력을 적용하여 배면 토압에 의해 발생되는 휨모멘트 및 수평변위를 감소시키도록 한 프리스트레스가 도입된 엄지말뚝과 이를 이용한 자립식 가설 흙막이 시공방법에 관한 것이다.The present invention relates to a thumb pile in which prestress is introduced and a method of constructing a self-supporting temporary soil barrier using the same.In particular, in order to reduce the bending stress generated in the self-supporting soil barrier wall, a tension force is applied to the tension member in advance to reduce the bending caused by the back earth pressure. The present invention relates to a thumb pile in which a prestress is introduced to reduce moment and horizontal displacement, and a self-supporting temporary soil barrier construction method using the same.

현재 일반적으로 지하구조물 시공을 위하여 지반의 깊은 굴착시 흙막이 벽체를 유지하기 위하여 어스앵커 공법을 많이 이용하고 있다.Currently, in general, the earth anchor method is widely used to maintain the earthen wall during deep excavation of the ground for the construction of underground structures.

여기서, 상기한 어스앵커 공법은 인접부지를 10M 이상 근입하여 어스앵커를 정착하지만 인접부지의 이용이 제한될 경우에는 굴착고 약 2.5m 마다 스트러트(strut) 또는 레이커(raker) 방식을 적용할 수밖에 없는데 경제성 및 공사 조건상 크게 불리한 문제가 있다.Here, in the above-described ground anchor method, the ground anchor is settled by approaching the adjacent site by 10M or more, but if the use of the adjacent site is restricted, a strut or raker method must be applied every 2.5m of excavation height. There are significant disadvantages in terms of economics and construction conditions.

또한, 버팀보 및 앵커홀 이용한 종래의 공법은 버팀보를 터파기 수직방향으로 2∼3m 간격으로 촘촘하게 설치함으로써 작업공간이 협소하여 중장비 사용에 불편함을 초래하고, 또한 앵커를 활용할 경우에는 도심지 굴착에서 사유지 침범 및 기존 구조물 파손과 인근 지하수가 유입되어 공사에 상당한 어려움을 초래하는 문제가 있다. In addition, the conventional construction method using a brace and an anchor hole closely installs the brace at intervals of 2 to 3 m in the vertical direction of the excavation, causing inconvenience in using heavy equipment due to a narrow working space. In addition, in the case of using an anchor, private land in urban excavation There is a problem that invasion, damage to existing structures, and inflow of nearby groundwater cause considerable difficulties in construction.

등록특허 10-1609805(등록일: 2016년 03월 31일)Registered patent 10-1609805 (Registration date: March 31, 2016)

이에, 본 발명은 상기한 바와 같은 제문제점을 해결하기 위해 안출된 것으로, 흙막이 엄지말뚝에 걸이형 브라켓을 설치하고, 상기 걸이형 브라켓에 인장재를 설치하여, 상기 인장재에 긴장력을 가하여 토압을 지지하는 프리스트레스 빔 자립공법을 도입함으로써, 버팀보 설치 개수를 대폭 줄임으로써 넓은 작업공간을 확보하여 장비작업의 효율성 증가로 인한 공사기간의 단축 및 강재의 사용량이 감소되어 공사비 절감 및 시공성 향상을 도모하도록 한 프리스트레스가 도입된 엄지말뚝과 이를 이용한 자립식 가설 흙막이 시공방법을 제공하는데 그 목적이 있다. Thus, the present invention has been conceived to solve the above-described problems, by installing a hanging bracket on the earth retaining thumb pile, installing a tension member on the hanging bracket, and applying a tension force to the tension member to support the earth pressure. By introducing the prestress beam self-standing method, the number of support beams is significantly reduced, securing a wide work space, shortening the construction period due to the increase in equipment work efficiency, and reducing the use of steel, thereby reducing construction costs and improving constructability. Its purpose is to provide an introduced thumb pile and a self-supporting temporary soil barrier construction method using the same.

상기한 목적을 달성하기 위한 프리스트레스가 도입된 엄지말뚝은 일정한 길이를 갖는 H빔으로 이루어진 엄지말뚝과; 상기 엄지말뚝의 소정의 위치에 상호 대향되게 결합되는 걸이형 브라켓과; 상기 걸이형 브라켓 간에 수직으로 고정 설치되는 인장재로 구성됨을 특징으로 한다.The thumb pile to which the pre-stress is introduced to achieve the above object comprises a thumb pile made of an H beam having a predetermined length; A hanging bracket coupled to a predetermined position of the thumb stake to be opposed to each other; It characterized in that it consists of a tension member that is fixedly installed vertically between the hanging brackets.

또한, 상기한 목적을 달성하기 위한 프리스트레스가 도입된 엄지말뚝을 이용한 자립식 가설 흙막이 시공방법은 프리스트레스가 도입된 엄지말뚝을 제작하는 단계(S 1); 지반에 일정한 간격을 두고, 소정의 직경 및 깊이로 천공하여 천공홀을 형성하는 단계(S 2); 상기 천공홀에 프리스트레스가 도입된 엄지말뚝을 항타 근입하는 단계(S 3); 상기 프리스트레스가 도입된 엄지말뚝에 설치된 인장재를 인장하는 단계(S 4); 상기 프리스트레스가 도입된 엄지말뚝의 전면부를 굴착 진행함과 동시에 토류판을 설치하는 단계(S 5)로 이루어짐을 특징으로 한다.In addition, the self-supporting temporary soil barrier construction method using a thumb pile into which prestress is introduced to achieve the above object includes the steps of producing a thumb pile into which prestress is introduced (S 1); Forming a perforated hole by perforating with a predetermined diameter and depth at regular intervals in the ground (S 2); Driving a thumb pile into which the prestress is introduced into the perforation hole (S 3); Tensioning a tension member installed on the thumb pile into which the prestress is introduced (S 4); It characterized in that it consists of a step (S5) of installing a earth plate while excavating the front part of the thumb pile into which the prestress was introduced.

이상에서 설명한 바와 같이, 본 발명에 따른 프리스트레스가 도입된 엄지말뚝과 이를 이용한 자립식 가설 흙막이 시공방법은 다음과 같은 효과가 있다.As described above, the thumb pile to which the prestress was introduced and the self-supporting temporary soil barrier construction method using the same according to the present invention have the following effects.

첫째, 본 발명은 작업공간 확보로 시공기간의 단축이 필요한 경우, 건축이나 토목구조물에서 버팀보나 앵커로 지지가 곤란한 경우, 사유지 침범이나 지중매설물로 인한 앵커 시공이 곤란한 경우, 앵커 시공으로 인한 피해가 우려되는 경우, 버팀보로 인해 작업의 효율성이 현저히 저하되는 경우, 기타 공기단축 및 공사비 절감이 요구되는 경우에 적용할 수 있는 장점이 있다.First, in the present invention, when it is necessary to shorten the construction period by securing a work space, when it is difficult to support it with a support beam or an anchor in a building or civil structure, when it is difficult to install an anchor due to invasion of private land or underground In case of concern, there is an advantage that can be applied in cases where the efficiency of work is significantly reduced due to the support beam, and in other cases where construction cost reduction is required.

둘째, 본 발명은 종래의 공법에서 지보재 설치공정의 생략 및 원활한 굴착작업의 진행으로 설치비용 및 공기기간을 20-30% 이상을 단축할 수 있다.Second, the present invention can reduce the installation cost and construction period by 20-30% or more by the omission of the support material installation process and smooth excavation operation in the conventional construction method.

특히 종래의 일반 공법에 비해 강재량 감소로 인하여 경제성을 제고할 수 있고, 무지보공법으로 본체 구조물 시공시 간섭을 최소화할 수 있다. In particular, it is possible to improve economic efficiency due to a reduction in the amount of steel compared to the conventional general construction method, and the interference can be minimized when constructing the main body structure by the unsupported construction method.

셋째, 본 발명은 변위발생 지속시 변위 강제 억제방식으로 안정성이 보장된다.Third, in the present invention, stability is ensured by a method of forcibly suppressing displacement when displacement continues.

즉, 종래의 공법은 파괴시 전단파괴로 위험하나, 본 발명은 변위발생 지속시 보완 대응이 가능하고, 프리스트레스로 인한 변위 회복 및 하중상쇄로 안정성을 최대화할 수 있다.That is, the conventional construction method is dangerous due to shear failure upon failure, but the present invention can compensate for the continuous occurrence of displacement, and maximize stability due to displacement recovery and load offset due to prestress.

도 1은 본 발명에 따른 프리스트레스가 도입된 엄지말뚝을 도시한 개념도,
도 2는 본 발명에 따른 프리스트레스가 도입된 엄지말뚝을 도시한 사시도,
도 3은 본 발명에 따른 프리스트레스가 도입된 엄지말뚝을 도시한 정면도,
도 4는 본 발명에 따른 프리스트레스가 도입된 엄지말뚝의 걸이형 브라켓을 도시한 사시도,
도 5는 본 발명에 따른 프리스트레스가 도입된 엄지말뚝을 이용한 자립식 가설 흙막이를 도시한 예시도.1 is a conceptual diagram showing a thumb pile into which a prestress according to the present invention is introduced,
2 is a perspective view showing a thumb pile into which prestress according to the present invention is introduced,
3 is a front view showing a thumb pile into which prestress is introduced according to the present invention,
4 is a perspective view showing a hanging bracket of a thumb pile into which a prestress according to the present invention is introduced,
Figure 5 is an exemplary view showing a self-supporting temporary soil barrier using a thumb pile into which prestress is introduced according to the present invention.

이하, 본 발명을 첨부한 예시도면을 참조하여 상세히 설명한다.Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

도 1은 본 발명에 따른 프리스트레스가 도입된 엄지말뚝을 도시한 개념도이고, 도 2는 본 발명에 따른 프리스트레스가 도입된 엄지말뚝을 도시한 사시도이며, 도 3은 본 발명에 따른 프리스트레스가 도입된 엄지말뚝을 도시한 정면도이다.1 is a conceptual diagram showing a thumb pile into which prestress according to the present invention is introduced, FIG. 2 is a perspective view showing a thumb pile into which prestress according to the present invention is introduced, and FIG. 3 is a thumb into which prestress is introduced according to the present invention It is a front view showing a stake.

이들 도면에 도시된 바와 같이, 본 발명에 따른 프리스트레스가 도입된 엄지말뚝(P)은 자립식 흙막이 벽체에 발생하는 휨응력을 감소시키기 위해 엄지말뚝(100)에 걸이형 브라켓(200)을 설치하고, 상기 걸이형 브라켓(200)에 인장재(300)를 사전에 긴장력을 적용하여 지반 굴착의 배면 토압에 의해 발생되는 휨모멘트와 수평변위를 감소시키도록 한 구조체이다.As shown in these drawings, the thumb pile (P) into which the prestress according to the present invention is introduced, installs a hanging bracket 200 on the thumb pile 100 in order to reduce the flexural stress generated in the self-supporting earth retaining wall, It is a structure in which the tension member 300 is applied to the hanging bracket 200 in advance to reduce the bending moment and horizontal displacement generated by the back earth pressure of the ground excavation.

즉, 본 발명에 따른 프리스트레스가 도입된 엄지말뚝(P)은 일정한 길이를 갖는 H빔으로 이루어진 엄지말뚝(100)과; 상기 엄지말뚝의 소정의 위치에 상호 대향되게 결합되는 걸이형 브라켓(200)과; 상기 걸이형 브라켓(200) 간에 수직으로 고정 설치되는 인장재(300)로 구성된다.That is, the thumb pile (P) to which the prestress is introduced according to the present invention includes a thumb pile (100) made of an H beam having a predetermined length; A hanging bracket 200 coupled to each other to be opposed to each other at a predetermined position of the thumb stake; It consists of a tension member 300 that is fixedly installed vertically between the hanging bracket 200.

여기서, 상기 엄지말뚝(100)은 플랜지와 웨브로 이루어진 H빔이다. Here, the thumb pile 100 is an H beam made of a flange and a web.

또한, 상기 걸이형 브라켓(200)은 도 4에 도시된 바와 같이, 걸이형 상부브라켓(200a)과 걸이형 하부브라켓(200b)으로 구성된다.In addition, the hanging bracket 200 is composed of a hanging upper bracket (200a) and a hanging lower bracket (200b), as shown in FIG.

여기서, 상기 걸이형 상부브라켓(200a)과 걸이형 하부브라켓(200b)은 동일한 형상으로 엄지말뚝(100)에 서로 대향되게 설치된다.Here, the hanging upper bracket 200a and the hanging lower bracket 200b are installed to face each other on the thumb pile 100 in the same shape.

특히, 상기 걸이형 상부브라켓(200a)과 걸이형 하부브라켓(200b)은 일정한 두께 및 폭을 갖는 사각형상으로 이루어진 수직판(210)과; 상기 수직판(210)의 단부로부터 직각으로 꺾여 형성되는 수평판(220)과; 상기 수평판(220)의 단부로부터 직각으로 꺾여 형성되는 걸이판(230)과; 상기 수직판(210)과 수평판(220) 간에 경사지게 배치되며, 삼각형상으로 이루어진 경사판(240)과; 상기 수평판(220)에 일정한 직경을 갖도록 다수개가 천공 형성된 정착공(250)으로 구성된다.In particular, the hanger-type upper bracket (200a) and the hanger-type lower bracket (200b) include a vertical plate 210 made of a rectangular shape having a constant thickness and width; A horizontal plate 220 formed by being bent at a right angle from the end of the vertical plate 210; A hook plate 230 formed by being bent at a right angle from the end of the horizontal plate 220; An inclined plate 240 disposed inclined between the vertical plate 210 and the horizontal plate 220 and having a triangular shape; The horizontal plate 220 is composed of a plurality of perforated fixing holes 250 to have a constant diameter.

여기서, 상기 수직판(210)과 수평판(220) 및 경사판(240)의 형상을 각각 다르게 한 이유는 정착공(250)에 설치되는 인장재(300)의 긴장에 따른 걸이형 브라켓(200)의 변형을 방지하고, 강재량을 감소시키기 위함이다.Here, the reason that the shapes of the vertical plate 210, the horizontal plate 220, and the inclined plate 240 are different from each other is that of the hanging bracket 200 according to the tension of the tension member 300 installed in the fixing hole 250. It is to prevent deformation and to reduce the amount of steel.

즉, 상기 상부브라켓(200a)과 하부브라켓(200b)은 수직판(210), 수평판(220), 경사판(240) 및 정착공(250)이 유기적으로 결합된 부재이다.That is, the upper bracket 200a and the lower bracket 200b are members in which the vertical plate 210, the horizontal plate 220, the swash plate 240, and the fixing hole 250 are organically combined.

여기서, 상기 수평판(220)은 수직판(210)과 경사판(240)에 비하여 두께가 더 두껍게 형성된다.Here, the horizontal plate 220 is formed to be thicker than the vertical plate 210 and the swash plate 240.

이와 같이 수평판(220)을 더 두껍게 형성한 이유는 걸이형 상, 하부브라켓(200a, 200b)의 정착공(250)에 설치되는 인장재(300)를 효율적으로 긴장하기 위해 두께를 다르게 형성하고, 상기 수직판(210)과 경사판(240)은 두께가 동일하게 형성된다.The reason why the horizontal plate 220 is formed thicker in this way is that the thickness of the tension member 300 installed in the fixing hole 250 of the lower brackets 200a and 200b is formed differently in order to efficiently tension, The vertical plate 210 and the swash plate 240 are formed to have the same thickness.

한편, 상기 경사판(240)은 수직판(210)에 부착시 수직판(210)의 내측에는 복수의 큰 경사판(240)이 설치되고, 상기 큰 경사판(240)의 외측에 작은 경사판(240)이 설치된다.Meanwhile, when the swash plate 240 is attached to the vertical plate 210, a plurality of large swash plates 240 are installed inside the vertical plate 210, and a small swash plate 240 is provided outside the large swash plate 240. Installed.

이와 같이 경사판(240)의 크기를 다르게 한 이유는 인장재(300) 긴장시 힘을 많이 받는 부분은 경사판(240)의 크기를 크게 하고, 힘을 적게 받는 부분은 경사판(240)의 크기를 작게 하여 불필요한 강재의 낭비를 방지하기 위함이다.The reason why the size of the swash plate 240 is different is that the size of the swash plate 240 is increased when the tension member 300 receives a lot of force when the tension member 300 is tensioned, and the size of the swash plate 240 is reduced for the portion receiving less force. This is to prevent unnecessary waste of steel.

한편, 상기 걸이형 상부브라켓(200a)을 엄지말뚝(100)에 설치할 때는 엄지말뚝(100)의 최상단의 일측에 걸이판(230)의 삽입홈을 엄지말뚝의 웨브에 끼워서 거는 방식으로 설치한다.On the other hand, when the hanging upper bracket (200a) is installed on the thumb pile 100, the insertion groove of the hook plate 230 on one side of the uppermost end of the thumb pile 100 is inserted into the web of the thumb pile, and is installed by hanging.

또한, 상기 걸이형 하부브라켓(200b)은 상기 걸이형 상부브라켓(200a)으로부터 하향 수직으로 일정거리 유지된 상태로 엄지말뚝(100)의 단부에 설치된다.In addition, the hanging-type lower bracket 200b is installed at the end of the thumb pile 100 while being maintained at a predetermined distance vertically downward from the hanging-type upper bracket 200a.

여기서, 상기 걸이형 하부브라켓(200b)을 걸이형 상부브라켓(200a)에 대향되는 위치인 엄지말뚝(100)의 최하단에 수직으로 설치하는 것이 구조적으로 유리하다.Here, it is structurally advantageous to install the hanging lower bracket 200b vertically at the lowermost end of the thumb pile 100, which is a position opposite to the hanging upper bracket 200a.

또한, 상기 걸이형 상부브라켓(200a)과 걸이형 하부브라켓(200b) 사이에 전장이 너무 길어질 경우, 엄지말뚝(100)의 소정의 위치에 중간간격재를 설치할 수 있음을 밝혀둔다.In addition, when the total length between the hanging upper bracket (200a) and the hanging lower bracket (200b) is too long, it is revealed that the intermediate spacer can be installed at a predetermined position of the thumb pile (100).

한편, 상기 인장재(300)는 고강도 구조용 인장재로 구성할 수도 있음을 밝혀둔다.On the other hand, it turns out that the tension member 300 may be composed of a high strength structural tension member.

또한, 상기 걸이판(230)의 표면의 양측에 일정한 두께를 갖는 보강살(232)이 일체로 형성된다.In addition, reinforcing ribs 232 having a predetermined thickness are integrally formed on both sides of the surface of the hook plate 230.

이와 같은 보강살(232)은 걸이판(230)의 구조적인 강도를 향상시키기 위해 형성된 것이다. Such reinforcing flesh 232 is formed to improve the structural strength of the hanging plate 230.

그리고, 상기 걸이판(230)의 가운데에 일정한 길이 및 폭을 갖도록 삽입홈(234)이 형성되어, 상기 삽입홈(234)이 엄지말뚝(100)의 웨브에 긴밀하게 결합되도록 한다.In addition, an insertion groove 234 is formed in the center of the hook plate 230 to have a predetermined length and width, so that the insertion groove 234 is closely coupled to the web of the thumb pile 100.

이하, 상기한 바와 같은 구성으로 이루어진 본 발명에 따른 프리스트레스가 도입된 엄지말뚝을 이용한 자립식 가설 흙막이 시공에 대해 설명한다.Hereinafter, a description will be given of the construction of a self-supporting temporary soil barrier using a thumb pile into which the prestress according to the present invention has been constructed as described above.

도 5는 본 발명에 따른 프리스트레스가 도입된 엄지말뚝을 이용한 자립식 가설 흙막이를 도시한 예시도이다.Figure 5 is an exemplary view showing a self-supporting temporary soil barrier using a thumb pile into which prestress is introduced according to the present invention.

이 도면에 도시된 바와 같이, 본 발명에 따른 프리스트레스가 도입된 엄지말뚝을 이용한 자립식 가설 흙막이 시공방법은 프리스트레스가 도입된 엄지말뚝(P)을 제작하는 단계(S 1); 지반(G)에 일정한 간격을 두고, 소정의 직경 및 깊이로 천공하여 천공홀(H)을 형성하는 단계(S 2); 상기 천공홀(H)에 프리스트레스가 도입된 엄지말뚝(P)을 항타 근입하는 단계(S 3); 상기 프리스트레스가 도입된 엄지말뚝(P)에 설치된 인장재(300)를 인장하는 단계(S 4); 상기 프리스트레스가 도입된 엄지말뚝(P)의 전면부를 굴착 진행함과 동시에 토류판을 설치하는 단계(S 5)로 이루어진다.As shown in this figure, the self-supporting temporary soil barrier construction method using a thumb pile into which prestress is introduced according to the present invention includes the steps of manufacturing a thumb pile (P) into which prestress is introduced (S 1); Forming a perforated hole (H) by perforating the ground (G) at a predetermined distance and having a predetermined diameter and depth (S 2 ); Driving (S3) the thumb pile (P) into which the prestress is introduced into the perforated hole (H); Tensioning the tension member 300 installed on the thumb pile (P) into which the prestress is introduced (S 4); It consists of a step (S5) of installing an earth plate while excavating the front part of the thumb pile (P) into which the prestress was introduced.

즉, 본 발명에 따른 프리스트레스가 도입된 엄지말뚝을 이용한 자립식 가설 흙막이 시공방법은 일정한 길이를 갖는 H빔으로 이루어진 엄지말뚝(100)과; 상기 엄지말뚝의 소정의 위치에 상호 대향되게 결합되는 걸이형 브라켓(200)과; 상기 걸이형 브라켓(200) 간에 수직으로 고정 설치되는 인장재(300)로 구성되고, 상기 걸이형 브라켓(200)은 걸이형 상부브라켓(200a)과 걸이형 하부브라켓(200b)으로 구성되며, 상기 걸이형 상부브라켓(200a)과 걸이형 하부브라켓(200b)은 일정한 두께 및 폭을 갖는 사각형상으로 이루어진 수직판(210)과; 상기 수직판(210)의 단부로부터 직각으로 꺾여 형성되는 수평판(220)과; 상기 수평판(220)의 단부로부터 직각으로 꺾여 형성되는 걸이판(230)과; 상기 수직판(210)과 수평판(220) 간에 경사지게 배치되며, 삼각형상으로 이루어진 경사판(240)과; 상기 수평판(220)에 일정한 직경을 갖도록 다수개가 천공 형성된 정착공(250)으로 구성되며, 상기 걸이판(230)의 표면의 양측에 일정한 두께를 갖는 보강살(232)이 일체로 형성되며, 상기 걸이판(230)의 가운데에 일정한 길이 및 폭을 갖도록 삽입홈(234)이 형성된 프리스트레스가 도입된 엄지말뚝(P)을 제작하고, 상기 프리스트레스가 도입된 엄지말뚝(P)을 설치할 대상 지반(G)을 일정한 간격을 두고, 소정의 직경 및 깊이로 천공하여 천공홀(H)을 형성한 후, 상기 천공홀(H)에 프리스트레스가 도입된 엄지말뚝(P)을 항타 근입한 후, 상기 항타 근입된 프리스트레스가 도입된 엄지말뚝(P)에 설치된 인장재(300)를 소정의 힘으로 인장시킨 후, 상기 프리스트레스가 도입된 엄지말뚝(P)의 전면부를 굴착 반복 진행하면서 토류판(미도시)을 설치한다.That is, the self-supporting temporary soil barrier construction method using a thumb pile to which prestress is introduced according to the present invention comprises: a thumb pile 100 made of an H beam having a predetermined length; A hanging bracket 200 coupled to each other to be opposed to each other at a predetermined position of the thumb stake; Consisting of a tension member 300 fixed vertically between the hanger-type bracket 200, the hanger-type bracket 200 is composed of a hanger-type upper bracket (200a) and a hanger-type lower bracket (200b), the hanger The type upper bracket 200a and the hanging lower bracket 200b include a vertical plate 210 made of a square shape having a predetermined thickness and width; A horizontal plate 220 formed by being bent at a right angle from the end of the vertical plate 210; A hook plate 230 formed by being bent at a right angle from the end of the horizontal plate 220; An inclined plate 240 disposed inclined between the vertical plate 210 and the horizontal plate 220 and having a triangular shape; The horizontal plate 220 is composed of a plurality of perforated fixing holes 250 to have a constant diameter, and reinforcing ribs 232 having a predetermined thickness are integrally formed on both sides of the surface of the hanging plate 230, The prestressed thumb pile (P) in which the insertion groove 234 is formed so as to have a certain length and width in the center of the hook plate 230 is manufactured, and the target ground to which the prestressed thumb pile (P) is installed ( G) is drilled to a predetermined diameter and depth at regular intervals to form a perforated hole (H), and a thumb pile (P) with prestress introduced into the perforated hole (H) is driven and inserted, and then the driving After tensioning the tension member 300 installed on the thumb pile (P) into which the prestressed prestress was introduced with a predetermined force, the front part of the thumb pile (P) into which the prestress was introduced is repeatedly excavated to install a earth plate (not shown). do.

또한, 상기 굴착 단계별로 변위 계측 및 관리를 시행한다.In addition, displacement measurement and management are performed at each stage of excavation.

여기서, 상기 항타 근입단계(S 3)는 프리스트레스가 도입된 엄지말뚝(P)의 걸이형 브라켓(200) 방향이 굴착배면을 향하도록 한 상태로 천공홀(H)에 근입한다.Here, in the driving approach step (S3), the prestress is introduced into the drilling hole (H) in a state in which the direction of the hanging bracket 200 of the thumb pile (P) into which the prestress is introduced is toward the rear of the excavation.

즉, 상기 프리스트레스가 도입된 엄지말뚝(P)의 근입방향을 굴착배면 방향으로 설치한 이유는 자립식 흙막이 벽체에 발생하는 휨응력을 감소시키기 위함으로, 엄지말뚝(100)에 걸이형 브라켓(200)을 설치하고, 상기 걸이형 브라켓(200)에 인장재(300)를 설치하여 프리스트레스가 도입된 엄지말뚝(P)을 형성한 후, 사전에 긴장력을 적용하여 굴착지반 배면 토압에 의해 발생되는 휨모멘트 및 수평변위를 감소시키기 위함으로, 상기 프리스트레스가 도입된 엄지말뚝(P) 후면부에 인장재(300)에 의한 프리스트레스를 도입하여 프리스트레스가 도입된 엄지말뚝(P)을 근입 후 인장하여 배면토압에 저항토록 하기 위함이다.That is, the reason why the prestressed thumb pile (P) is installed in the direction of the back of the excavation is to reduce the bending stress generated in the self-supporting earthen wall, and the hanging bracket 200 on the thumb pile 100 After installing and installing the tension member 300 to the hanging bracket 200 to form the thumb pile (P) into which the pre-stress is introduced, the bending moment generated by the earth pressure on the back of the excavation ground and In order to reduce the horizontal displacement, pre-stress by the tension member 300 is introduced at the rear of the thumb pile (P) into which the pre-stress has been introduced, and then the thumb pile (P) into which the pre-stress has been introduced is tensioned to resist back earth pressure. It is for sake.

상기한 바와 같은 단계로 이루어진 본 발명에 따른 프리스트레스가 도입된 엄지말뚝을 이용한 자립식 가설 흙막이 시공방법은 흙막이 엄지말뚝(100)에 걸이형 브라켓(200)을 설치하고, 상기 걸이형 브라켓(200)에 인장재으로 이루어진 인장재(300)를 설치하여, 상기 인장재(300)에 긴장력을 가하여 토압을 지지하는 프리스트레스가 도입된 엄지말뚝(P)을 도입함으로써, 버팀보 설치 개수를 대폭 줄임으로써 넓은 작업공간을 확보하여 장비작업의 효율성 증가로 인한 공사기간의 단축 및 강재의 사용량이 감소되어 공사비 절감 및 시공성 향상을 도모하는 작용효과가 있다.In the self-supporting temporary soiling construction method using a thumb pile with prestress introduced according to the present invention consisting of the steps as described above, a hanging bracket 200 is installed on the holding thumb pile 100, and the hanging bracket 200 By installing a tension member 300 made of a tension member to the tension member 300 and introducing a prestressed thumb pile (P) that supports earth pressure by applying a tension force to the tension member 300, a wide work space is secured by significantly reducing the number of braces installed. Therefore, the construction period is shortened due to the increase in the efficiency of the equipment work and the use of steel materials is reduced, thereby reducing construction costs and improving constructability.

본 발명의 명세서에 기재한 바람직한 실시예는 예시적인 것으로서 한정적인 것은 아니며, 본 발명의 범위는 첨부된 특허청구범위에 의해서 나타나 있고, 그들 특허청구범위의 의미중에 들어가는 모든 변형예는 본 발명에 포함되는 것이다.The preferred embodiments described in the specification of the present invention are illustrative and not restrictive, and the scope of the present invention is indicated by the appended claims, and all modifications falling within the meaning of the claims are included in the present invention. It becomes.

100: 엄지말뚝 200: 걸이형 브라켓
200a: 걸이형 상부브라켓 200b: 걸이형 하부브라켓
210: 수직판 220: 수평판
230: 걸이판 232: 보강살
234: 삽입홈 240: 경사판
250: 정착공 300: 인장재
G: 지반 H: 천공홀
P: 프리스트레스가 도입된 엄지말뚝 100: thumb stake 200: hanging bracket
200a: hanging upper bracket 200b: hanging lower bracket
210: vertical plate 220: horizontal plate
230: hook plate 232: reinforcement
234: insertion groove 240: inclined plate
250: fixing hole 300: tension member
G: ground H: drilled hole
P: thumb stake with prestressed

Claims (11)

일정한 길이를 갖는 H빔으로 이루어진 엄지말뚝(100)과; 상기 엄지말뚝의 소정의 위치에 상호 대향되게 결합되는 걸이형 브라켓(200)과; 상기 걸이형 브라켓(200) 간에 수직으로 고정 설치되는 인장재(300)로 구성되고, 상기 걸이형 브라켓(200)은 걸이형 상부브라켓(200a)과 걸이형 하부브라켓(200b)으로 동일한 형상으로 구성되며, 상기 걸이형 상부브라켓(200a)과 걸이형 하부브라켓(200b)은 일정한 두께 및 폭을 갖는 사각형상으로 이루어진 수직판(210)과; 상기 수직판(210)의 단부로부터 직각으로 꺾여 형성되는 수평판(220)과; 상기 수평판(220)의 단부로부터 직각으로 꺾여 형성되는 걸이판(230)과; 상기 수직판(210)과 수평판(220) 간에 경사지게 배치되며, 삼각형상으로 이루어진 경사판(240)과; 상기 수평판(220)에 일정한 직경을 갖도록 다수개가 천공 형성된 정착공(250)으로 구성되며, 상기 수직판(210)과 수평판(220) 및 경사판(240)의 형상은 각각 다르게 형성되되, 상기 수평판(220)은 수직판(210)과 경사판(240)에 비하여 두께가 더 두껍게 형성되며, 상기 수직판(210)과 경사판(240)은 두께가 동일하게 형성되며, 상기 경사판(240)은 큰 경사판(240)과 작은 경사판(240)으로 구분하여 형성되되, 상기 경사판(240)을 수직판(210)에 부착시 수직판(210)의 내측에는 복수의 큰 경사판(240)이 설치되고, 상기 큰 경사판(240)의 외측에 작은 경사판(240)이 설치되며, 상기 걸이판(230)의 표면의 양측에 일정한 두께를 갖는 보강살(232)이 일체로 형성되며, 상기 걸이판(230)의 가운데에 일정한 길이 및 폭을 갖도록 삽입홈(234)이 형성되며, 상기 걸이형 상부브라켓(200a)은 엄지말뚝(100)의 최상단의 일측에 걸이판(230)의 삽입홈(234)을 엄지말뚝(100)의 웨브에 끼워서 설치되며, 상기 걸이형 하부브라켓(200b)는 상기 걸이형 상부브라켓(200a)으로부터 하향 수직으로 일정거리 유지된 상태로 엄지말뚝(100)의 단부에 설치되며, 상기 걸이형 하부브라켓(200b)은 걸이형 상부브라켓(200a)에 대향되는 위치인 엄지말뚝(100)의 최하단에 수직으로 설치되어, 사전에 긴장력을 적용하여 지반 굴착의 배면 토압에 의해 발생되는 휨모멘트와 수평변위를 감소시키도록 한 것을 특징으로 하는 프리스트레스가 도입된 엄지말뚝.A thumb pile 100 made of an H beam having a certain length; A hanging bracket 200 coupled to each other to be opposed to each other at a predetermined position of the thumb stake; It is composed of a tension member 300 that is vertically fixed and installed between the hanging brackets 200, and the hanging bracket 200 has the same shape as a hanging upper bracket 200a and a hanging lower bracket 200b. , The hanger-type upper bracket (200a) and the hanger-type lower bracket (200b) is a vertical plate 210 made of a rectangular shape having a constant thickness and width; A horizontal plate 220 formed by being bent at a right angle from the end of the vertical plate 210; A hook plate 230 formed by being bent at a right angle from the end of the horizontal plate 220; An inclined plate 240 disposed inclined between the vertical plate 210 and the horizontal plate 220 and having a triangular shape; The horizontal plate 220 is composed of a plurality of perforated fixing holes 250 to have a predetermined diameter, the vertical plate 210, the horizontal plate 220 and the inclined plate 240 are formed differently in shape, respectively, the The horizontal plate 220 is formed to be thicker than the vertical plate 210 and the swash plate 240, the vertical plate 210 and the swash plate 240 are formed to have the same thickness, and the swash plate 240 is It is formed by being divided into a large inclined plate 240 and a small inclined plate 240, and when the inclined plate 240 is attached to the vertical plate 210, a plurality of large inclined plates 240 are installed inside the vertical plate 210, A small swash plate 240 is installed outside the large swash plate 240, and reinforcing ribs 232 having a predetermined thickness are integrally formed on both sides of the surface of the hook plate 230, and the hook plate 230 The insertion groove 234 is formed to have a certain length and width in the middle of the hook-type upper bracket 200a, the insertion groove 234 of the hook plate 230 on one side of the uppermost end of the thumb pile 100 It is installed by being inserted into the web of the pile 100, and the hanging-type lower bracket 200b is installed at the end of the thumb pile 100 in a state maintained at a certain distance vertically downward from the hanging-type upper bracket 200a. The hanging lower bracket 200b is installed vertically at the bottom of the thumb pile 100, which is a position opposite to the hanging upper bracket 200a, and a bending moment generated by the back earth pressure of the ground excavation by applying tension in advance. And a thumb pile with prestress introduced, characterized in that to reduce the horizontal displacement. 삭제delete 삭제delete 삭제delete 삭제delete 일정한 길이를 갖는 H빔으로 이루어진 엄지말뚝(100)과; 상기 엄지말뚝의 소정의 위치에 상호 대향되게 결합되는 걸이형 브라켓(200)과; 상기 걸이형 브라켓(200) 간에 수직으로 고정 설치되는 인장재(300)로 구성되고, 상기 걸이형 브라켓(200)은 걸이형 상부브라켓(200a)과 걸이형 하부브라켓(200b)으로 동일한 형상으로 구성되며, 상기 걸이형 상부브라켓(200a)과 걸이형 하부브라켓(200b)은 일정한 두께 및 폭을 갖는 사각형상으로 이루어진 수직판(210)과; 상기 수직판(210)의 단부로부터 직각으로 꺾여 형성되는 수평판(220)과; 상기 수평판(220)의 단부로부터 직각으로 꺾여 형성되는 걸이판(230)과; 상기 수직판(210)과 수평판(220) 간에 경사지게 배치되며, 삼각형상으로 이루어진 경사판(240)과; 상기 수평판(220)에 일정한 직경을 갖도록 다수개가 천공 형성된 정착공(250)으로 구성되며, 상기 수직판(210)과 수평판(220) 및 경사판(240)의 형상은 각각 다르게 형성되되, 상기 수평판(220)은 수직판(210)과 경사판(240)에 비하여 두께가 더 두껍게 형성되며, 상기 수직판(210)과 경사판(240)은 두께가 동일하게 형성되며, 상기 경사판(240)은 큰 경사판(240)과 작은 경사판(240)으로 구분하여 형성되되, 상기 경사판(240)을 수직판(210)에 부착시 수직판(210)의 내측에는 복수의 큰 경사판(240)이 설치되고, 상기 큰 경사판(240)의 외측에 작은 경사판(240)이 설치되며, 상기 걸이판(230)의 표면의 양측에 일정한 두께를 갖는 보강살(232)이 일체로 형성되며, 상기 걸이판(230)의 가운데에 일정한 길이 및 폭을 갖도록 삽입홈(234)이 형성되며, 상기 걸이형 상부브라켓(200a)은 엄지말뚝(100)의 최상단의 일측에 걸이판(230)의 삽입홈(234)을 엄지말뚝(100)의 웨브에 끼워서 설치되며, 상기 걸이형 하부브라켓(200b)는 상기 걸이형 상부브라켓(200a)으로부터 하향 수직으로 일정거리 유지된 상태로 엄지말뚝(100)의 단부에 설치되며, 상기 걸이형 하부브라켓(200b)은 걸이형 상부브라켓(200a)에 대향되는 위치인 엄지말뚝(100)의 최하단에 수직으로 설치되어, 사전에 긴장력을 적용하여 지반 굴착의 배면 토압에 의해 발생되는 휨모멘트와 수평변위를 감소시키도록 한 프리스트레스가 도입된 엄지말뚝을 이용한 자립식 가설 흙막이 시공방법으로서,
프리스트레스가 도입된 엄지말뚝(P)을 제작하는 단계(S 1);
지반(G)에 일정한 간격을 두고, 소정의 직경 및 깊이로 천공하여 천공홀(H)을 형성하는 단계(S 2);
상기 천공홀(H)에 프리스트레스가 도입된 엄지말뚝(P)의 걸이형 브라켓(200)의 방향이 굴착배면을 향하도록 한 상태로 항타 근입하는 단계(S 3);
상기 프리스트레스가 도입된 엄지말뚝(P)에 설치된 인장재(300)를 인장하는 단계(S 4);
상기 프리스트레스가 도입된 엄지말뚝(100)의 전면부를 굴착 진행함과 동시에 토류판을 설치하는 단계(S 5)로 이루어짐을 특징으로 하는 프리스트레스가 도입된 엄지말뚝을 이용한 자립식 가설 흙막이 시공방법.A thumb pile 100 made of an H beam having a certain length; A hanging bracket 200 coupled to each other to be opposed to each other at a predetermined position of the thumb stake; It is composed of a tension member 300 that is vertically fixed and installed between the hanging brackets 200, and the hanging bracket 200 has the same shape as a hanging upper bracket 200a and a hanging lower bracket 200b. , The hanger-type upper bracket (200a) and the hanger-type lower bracket (200b) is a vertical plate 210 made of a rectangular shape having a constant thickness and width; A horizontal plate 220 formed by being bent at a right angle from the end of the vertical plate 210; A hook plate 230 formed by being bent at a right angle from the end of the horizontal plate 220; An inclined plate 240 disposed inclined between the vertical plate 210 and the horizontal plate 220 and having a triangular shape; The horizontal plate 220 is composed of a plurality of perforated fixing holes 250 to have a predetermined diameter, and the vertical plate 210, the horizontal plate 220, and the swash plate 240 are formed in different shapes, respectively. The horizontal plate 220 is formed to be thicker than the vertical plate 210 and the swash plate 240, the vertical plate 210 and the swash plate 240 are formed to have the same thickness, and the swash plate 240 is It is formed by being divided into a large inclined plate 240 and a small inclined plate 240, and when the inclined plate 240 is attached to the vertical plate 210, a plurality of large inclined plates 240 are installed inside the vertical plate 210, A small swash plate 240 is installed outside the large swash plate 240, and reinforcing ribs 232 having a predetermined thickness are integrally formed on both sides of the surface of the hook plate 230, and the hook plate 230 The insertion groove 234 is formed to have a certain length and width in the middle of the hook-type upper bracket 200a, the insertion groove 234 of the hook plate 230 on one side of the uppermost end of the thumb pile 100 It is installed by being inserted into the web of the pile 100, and the hanging-type lower bracket 200b is installed at the end of the thumb pile 100 in a state maintained at a certain distance vertically downward from the hanging-type upper bracket 200a. The hanging lower bracket 200b is installed vertically at the bottom of the thumb pile 100, which is a position opposite to the hanging upper bracket 200a, and a bending moment generated by the back earth pressure of the ground excavation by applying tension in advance. It is a self-supporting temporary soil barrier construction method using thumb piles with prestress introduced to reduce horizontal displacement and,
The step of producing a thumb pile (P) into which prestress is introduced (S 1);
Forming a perforated hole (H) by perforating the ground (G) at a predetermined distance and having a predetermined diameter and depth (S 2 );
Driving in a state in which the direction of the hanging bracket 200 of the thumb pile (P) into which the prestress is introduced into the perforated hole (H) is directed toward the back of the excavation (S 3);
Tensioning the tension member 300 installed on the thumb pile (P) into which the prestress is introduced (S 4);
A self-standing temporary soil barrier construction method using a thumb pile introduced with prestress, characterized in that it consists of the step (S5) of installing an earth plate while excavating the front part of the thumb pile 100 into which the prestress was introduced. 삭제delete 삭제delete 삭제delete 삭제delete 삭제delete
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Cited By (6)

* Cited by examiner, † Cited by third party
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KR20230030561A (en) * 2022-11-18 2023-03-06 오용환 Thumb pile using guide bracket and hanging bracket and construction method for retaining temporary facility using the same
KR20230065592A (en) * 2021-11-05 2023-05-12 주식회사 은덕엔지니어링 Prestressed pile for retaining wall with easy resource recovery and construction method thereof
KR20230110050A (en) * 2022-01-14 2023-07-21 최정주 PS-W using PS beam and its construction method
KR102561502B1 (en) * 2022-04-13 2023-08-01 (주)화성기초기술 prestressed pile assembly with easy fabrication and dismantling
KR102581735B1 (en) 2023-06-27 2023-09-22 오용환 Thumb pile including fitting bracket and method for constucting structure for temporary earth retaining
KR102613254B1 (en) 2023-02-15 2023-12-14 주식회사 토우디엔씨 Self-standing fixing type pile and construction method of earth retaining facilities including it

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KR102046965B1 (en) * 2018-08-20 2019-11-20 토우산업 주식회사 Prestress beam

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20230065592A (en) * 2021-11-05 2023-05-12 주식회사 은덕엔지니어링 Prestressed pile for retaining wall with easy resource recovery and construction method thereof
KR102647214B1 (en) * 2021-11-05 2024-03-13 주식회사 은덕엔지니어링 Prestressed pile for retaining wall with easy resource recovery and construction method thereof
KR20230110050A (en) * 2022-01-14 2023-07-21 최정주 PS-W using PS beam and its construction method
KR102572296B1 (en) * 2022-01-14 2023-08-30 최정주 PS-W using PS beam and its construction method
KR102561502B1 (en) * 2022-04-13 2023-08-01 (주)화성기초기술 prestressed pile assembly with easy fabrication and dismantling
KR20230030561A (en) * 2022-11-18 2023-03-06 오용환 Thumb pile using guide bracket and hanging bracket and construction method for retaining temporary facility using the same
KR102587630B1 (en) * 2022-11-18 2023-10-10 오용환 Thumb pile using guide bracket and hanging bracket and construction method for retaining temporary facility using the same
KR102613254B1 (en) 2023-02-15 2023-12-14 주식회사 토우디엔씨 Self-standing fixing type pile and construction method of earth retaining facilities including it
KR102581735B1 (en) 2023-06-27 2023-09-22 오용환 Thumb pile including fitting bracket and method for constucting structure for temporary earth retaining

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