KR101067707B1 - The earth retaining wall and waterproof construction technique for which cast in place concrete pile and grouting column was used - Google Patents

The earth retaining wall and waterproof construction technique for which cast in place concrete pile and grouting column was used Download PDF

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KR101067707B1
KR101067707B1 KR1020090099928A KR20090099928A KR101067707B1 KR 101067707 B1 KR101067707 B1 KR 101067707B1 KR 1020090099928 A KR1020090099928 A KR 1020090099928A KR 20090099928 A KR20090099928 A KR 20090099928A KR 101067707 B1 KR101067707 B1 KR 101067707B1
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cast
place concrete
concrete pile
grouting
steel pipe
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KR20110043017A (en
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최춘식
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이복우
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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
    • E02D5/385—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with removal of the outer mould-pipes
    • 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
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/02—Sheet piles or sheet pile bulkheads
    • E02D5/03—Prefabricated parts, e.g. composite sheet piles
    • E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
    • E02D5/06—Fitted piles or other elements specially adapted for closing gaps between two sheet piles or between two walls of sheet piles
    • 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
    • E02D5/02—Sheet piles or sheet pile bulkheads
    • E02D5/03—Prefabricated parts, e.g. composite sheet piles
    • E02D5/10—Prefabricated parts, e.g. composite sheet piles made of concrete or reinforced concrete
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00—Materials
    • E02D2300/0026—Metals
    • E02D2300/0029—Steel; Iron

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (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)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Piles And Underground Anchors (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)

Abstract

본 발명은 현장타설 콘크리트말뚝을 시공하고, 상기 현장타설 콘크리트말뚝의 배면 지반을 천공하여 그라우트재를 충전하여 그라우팅 기둥을 형성함으로써, 이와 같은 그라우트재의 충전으로 인하여 현장타설 콘크리트말뚝의 수직도를 유지할 뿐만 아니라 현장타설 콘크리트말뚝 간의 틈새에서 발생되는 누수를 완벽히 차단하여 시공성을 향상시킨 현장타설 콘크리트말뚝과 그라우팅 기둥을 이용한 주열식 토류벽 차수 시공방법을 제공하는데 그 목적이 있다.The present invention constructs a cast-in-place concrete pile, and by drilling the back ground of the cast-in-place concrete pile to fill the grout material to form a grouting column, thereby maintaining the verticality of the cast-in-place concrete pile due to the filling of such grout material In addition, the purpose of the present invention is to provide a method of constructing the ordered soil wall using the cast-in-place concrete piles and grouting columns which completely prevents the leakage occurring in the gap between the cast-in-place concrete piles.

상기한 목적을 달성하기 위한 본 발명에 따른 현장타설 콘크리트말뚝과 그라우팅 기둥을 이용한 주열식 토류벽 차수 시공방법은 지반을 일정한 직경 및 깊이를 갖도록 굴착하여 굴착공을 형성하면서, 상기 굴착공에 강관케이싱을 삽입하는 단계; 상기 굴착공 내에 삽입된 강관케이싱 내부의 슬라임을 외부로 반출하는 슬라임 제거단계; 상기 강관케이싱 내에 철근망을 삽입하거나, H빔을 삽입하여 설치하는 단계; 상기 철근망 또는 H빔이 삽입된 굴착공에 트레미관을 설치하고, 상기 트레미관에 콘크리트를 타설하면서 강관케이싱을 상부로 인발하는 단계; 상기 타설된 콘크리트를 일정시간 양생시켜 현장타설 콘크리트말뚝의 상부를 정리하고, 상기 현장타설 콘크리트말뚝 상단에 캡빔을 고정 설치하는 단계; 상기 현장타설 콘크리트말뚝과 현장타설 콘크리트말뚝과의 사이에 일정한 직경 및 깊이를 천공하여 그라우팅공을 형성하고, 상기 그라우팅공에 JSP장비를 이용하여 Φ200㎜의 소구경으로 그라우트재를 혼합 충전하여 그라우팅 기둥을 형성하는 단계로 이루어짐을 특징으로 한다.In order to achieve the above object, the main heat-type earth wall order construction method using the cast-in-place concrete pile and grouting pillar according to the present invention excavates the ground to have a predetermined diameter and depth, and forms a drill hole, and provides a steel pipe casing to the excavation hole. Inserting; A slime removal step of carrying out a slime inside the steel pipe casing inserted into the excavation hole to the outside; Inserting a reinforcing bar network into the steel pipe casing or inserting and installing an H beam; Installing a tremit tube in an excavation hole into which the rebar network or the H beam is inserted, and drawing steel pipe casing to the upper portion while placing concrete in the tremit tube; Curing the poured concrete for a predetermined time to clean up the upper portion of the cast-in-place concrete pile, and fixing and installing a cap beam on the top of the cast-in-place concrete pile; A grouting hole is formed by drilling a predetermined diameter and depth between the cast-in-place concrete pile and the cast-in-place concrete pile, and grouting material is mixed and filled with a grout material with a small diameter of Φ200 mm using the JSP equipment. Characterized in that it comprises a step of forming.

현장타설 콘크리트말뚝, 그라우팅 기둥, 시공방법 Cast-in-place concrete pile, grouting column, construction method

Description

현장타설 콘크리트말뚝과 그라우팅 기둥을 이용한 주열식 토류벽 차수 시공방법{The earth retaining wall and waterproof construction technique for which cast in place concrete pile and grouting column was used}The earth retaining wall and waterproof construction technique for which cast in place concrete pile and grouting column was used}

본 발명은 현장타설 콘크리트말뚝과 그라우팅 기둥을 이용한 주열식 토류벽 차수 시공방법에 관한 것으로, 특히 현장타설 콘크리트말뚝 시공과 그라우팅 기둥 시공을 복합 적용한 현장타설 콘크리트말뚝과 그라우팅 기둥을 이용한 주열식 토류벽 차수 시공방법에 관한 것이다.The present invention relates to a method for constructing a main column type earth wall using a cast-in-place concrete pile and a grouting column, and in particular, a method for constructing a column-type earth wall using a site-cast concrete pile and a grouting column using a site-cast concrete pile and a grouting column. It is about.

일반적으로 흙막이벽 또는 토류벽은 흙막이 구조물을 구성하는데, 편의상 강성벽체와 연성벽체로 크게 구분된다. In general, the mud wall or earth wall constitutes the mud structure, which is largely divided into a rigid wall and a flexible wall for convenience.

강성벽체는 벽체가 토압에 의해 변형이 일어나지 않을 만큼 강성이 크다고 가정하여 한계 평형상태로 Rankine 또는 Coulomb 토압 이론을 적용하여 해석하며, 연성벽체는 벽체를 연성으로 가정하여 굴착에 따른 벽체의 변위와 토압의 변화를 고려하는 탄소성 해석방법을 적용하여 해석한다.Rigid walls are analyzed by applying the Rankine or Coulomb earth pressure theory to the limit equilibrium, assuming that the wall is large enough not to be deformed by earth pressure.Flexible walls are assumed to be ductile. The elasto-plastic analysis method considering the change of is applied.

강성벽체에는 옹벽, 석축, 슬러리월, 주열식 콘크리트말뚝(CIP: cast in place pile) 등이 해당되고, 연성벽체에는 토류판벽체, 널말뚝벽 등이 해당된다.Retaining walls, stonework, slurry walls, cast in place piles (CIP) are applicable to rigid walls, and earth wall and board pile walls are examples of flexible walls.

흙막이벽은 본래 기초 터파기 공사에서 토압, 수압 등의 측압에 대한 저항을 목적으로 사용되는 가설구조물이며, 최근 도심지에서 굴착공사가 빈번해짐에 따라 주변지반의 침하와 건물의 보호를 주목적으로 사용되는 등 그 사용목적이 다양해지고 있다. The retaining wall is a temporary structure originally used for the purpose of resistance to lateral pressure such as earth pressure and water pressure in the foundation excavation work, and as the excavation work is frequently performed in urban areas recently, the main purpose is to settle the surrounding ground and protect the building. Its purpose is to diversify.

이와 같이 흙막이벽은 지층상태, 부지 및 주변 여건을 고려하여 적합한 형식의 선정이 중요하다. As such, it is important to select a suitable type of mud wall considering the ground condition, site and surrounding conditions.

특히, 굴착진행중 흙막이벽 주변지반 및 주변구조물의 안전을 위한 지지구조의 설치가 필요하며, 이와 같은 지지구조의 선정은 굴착지역 지반 및 주변 여건을 고려하여 적절하게 검토되어야 한다.In particular, it is necessary to install the supporting structure for the safety of the surrounding wall and surrounding structure during the excavation, and the selection of such supporting structure should be appropriately considered in consideration of the excavated ground and the surrounding conditions.

한편, 도심에서 개착식 공법구간의 굴착법면 거리를 최소로 하기 위하여 현장 여건에 따라 주로 주열식 말뚝공법을 채택한다. On the other hand, in order to minimize the excavation surface distance between the open construction methods in the city center, the main column pile method is adopted depending on the site conditions.

그런데 주열식 말뚝공법 등의 말뚝이 수직을 유지하지 못하고 전후좌우로 기울어지게 시공되어, 말뚝과 말뚝 사이가 완전히 겹쳐지지 못하고 이격 거리가 있거나, 지하수의 유속에 의해 골재 분리 현상이 발생되거나, 토질이 양호하지 못하여 말뚝 구근이 정상적으로 시공되지 못하여 크거나 작아서 다음 말뚝과의 이격이 발생하는 등의 이유로 인해 연속벽 시공이 부실한 경우가 있다. 이와 같은 상태에서 본 구조물 작업을 위한 굴착을 시행하면, 말뚝과 말뚝이 확실하게 겹쳐져 있지 못하여 말뚝들 사이의 틈새로 누수가 되거나, 심할 경우 배면의 토사가 유출될 수도 있다. 또한, 지하수의 유속이 빠른 지반토질(사질ㆍ역질토 등)에서는 직접 수압으로 지하 굴착시 물이 새는 문제가 있다.However, the piles such as the staggered pile method cannot be maintained vertically and are inclined to the front, rear, left, and right, so that the gap between the pile and the pile is not completely overlapped and there is a separation distance, aggregate separation occurs due to the groundwater flow rate, or soil quality is good. If the pile bulb is not installed properly, it may be large or small and the continuous wall construction is poor due to the separation from the next pile. In this state, the excavation for the work of the structure, the piles and piles do not overlap securely, may leak into the gap between the piles, or, in the case of severe soil leakage on the back. In addition, there is a problem that water leaks during underground excavation due to direct hydraulic pressure in the ground soil (sand soil, soil soil, etc.) having a high flow rate of groundwater.

이에, 본 발명은 상기한 바와 같은 제문제점을 해결하기 위해 안출된 것으로서, 현장타설 콘크리트말뚝을 시공하고, 상기 현장타설 콘크리트말뚝의 배면 지반을 천공하여 그라우트재를 충전하여 그라우팅 기둥을 형성함으로써, 이와 같은 그라우트재의 충전으로 인하여 현장타설 콘크리트말뚝의 수직도를 유지할 뿐만 아니라 현장타설 콘크리트말뚝 간의 틈새에서 발생되는 누수를 완벽히 차단하여 시공성을 향상시킨 현장타설 콘크리트말뚝과 그라우팅 기둥을 이용한 주열식 토류벽 시공방법을 제공하는데 그 목적이 있다.Thus, the present invention was devised to solve the problems as described above, by constructing the cast-in-place concrete pile, and by drilling the back ground of the cast-in-place concrete pile to fill the grout material to form a grouting column, In addition to maintaining the verticality of the cast-in-place concrete piles by the filling of grout material, the construction of the casting-type earth wall using the cast-in-place concrete piles and grouting columns that completely prevents leakage caused by the gap between the cast-in-place concrete piles The purpose is to provide.

상기한 목적을 달성하기 위한 본 발명에 따른 현장타설 콘크리트말뚝과 그라우팅 기둥을 이용한 주열식 토류벽 시공방법은 지반을 일정한 직경 및 깊이를 갖도록 굴착하여 굴착공을 형성하면서, 상기 굴착공에 강관케이싱을 삽입하는 단계; 상기 굴착공 내에 삽입된 강관케이싱 내부의 슬라임을 외부로 반출하는 슬라임 제거단계; 상기 강관케이싱 내에 철근망을 삽입하거나, H빔을 삽입하여 설치하는 단계; 상기 철근망 또는 H빔이 삽입된 굴착공에 트레미관을 설치하고, 상기 트레미관에 콘크리트를 타설하면서 강관케이싱을 상부로 인발하는 단계; 상기 타설된 콘크리트를 일정시간 양생시켜 현장타설 콘크리트말뚝의 상부를 정리하고, 상기 현장타설 콘크리트말뚝 상단에 캡빔을 고정 설치하는 단계; 상기 현장타설 콘크리트말뚝과 현장타설 콘크리트말뚝과의 사이에 일정한 직경 및 깊이를 천공하여 그라우팅공을 형성하고, 상기 그라우팅공에 JSP장비를 이용하여 Φ200㎜의 소구경으로 그라우트재를 혼합 충전하여 그라우팅 기둥을 형성하는 단계로 이루어짐을 특징으로 한다.In order to achieve the above object, the main column type earth wall construction method using the cast-in-place concrete pile and grouting column according to the present invention excavates the ground to have a predetermined diameter and depth, and forms a drill hole, and inserts a steel pipe casing into the excavation hole. Making; A slime removal step of carrying out a slime inside the steel pipe casing inserted into the excavation hole to the outside; Inserting a reinforcing bar network into the steel pipe casing or inserting and installing an H beam; Installing a tremit tube in an excavation hole into which the rebar network or the H beam is inserted, and drawing steel pipe casing to the upper portion while placing concrete in the tremit tube; Curing the poured concrete for a predetermined time to clean up the upper portion of the cast-in-place concrete pile, and fixing and installing a cap beam on the top of the cast-in-place concrete pile; A grouting hole is formed by drilling a predetermined diameter and depth between the cast-in-place concrete pile and the cast-in-place concrete pile, and grouting material is mixed and filled with a grout material with a small diameter of Φ200 mm using the JSP equipment. Characterized in that it comprises a step of forming.

이상에서 설명한 바와 같이, 본 발명에 따른 현장타설 콘크리트말뚝과 그라우팅 기둥을 이용한 주열식 토류벽 차수 시공방법은 현장타설 콘크리트말뚝을 시공하고, 상기 현장타설 콘크리트말뚝의 배면 지반을 천공하여 그라우트재를 충전하여 그라우팅 기둥을 형성함으로써, 이와 같은 그라우트재의 충전으로 인하여 현장타설 콘크리트말뚝의 수직도를 유지할 뿐만 아니라 현장타설 콘크리트말뚝 간의 틈새에서 발생되는 누수를 완벽히 차단하여 시공성이 향상되는 효과가 있다.As described above, the main heating type earth wall order construction method using the cast-in-place concrete piles and grouting columns according to the present invention constructs the cast-in-place concrete piles, and drills the back ground of the cast-in-place concrete piles to fill the grout material. By forming the grouting pillar, not only the verticality of the cast-in-place concrete piles is maintained due to the filling of the grouting material, but also the construction property is improved by completely blocking the leakage occurring in the gap between the cast-in-place concrete piles.

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

도 1은 본 발명에 따른 현장타설 콘크리트말뚝과 그라우팅 기둥을 이용한 주열식 토류벽을 도시한 차수 시공 평면도이고, 도 2는 본 발명에 따른 현장타설 콘크리트말뚝과 그라우팅 기둥을 이용한 주열식 토류벽을 도시한 차수 시공 측면도이며, 도 3a 내지 3e는 본 발명에 따른 현장타설 콘크리트말뚝과 그라우팅 기둥을 이용하여 주열식 토류벽을 시공하는 공정을 도시한 공정도이며, 도 4a 내지 4c는 본 발명에 따른 현장타설 콘크리트말뚝과 그라우팅 기둥을 이용한 주열식 토류벽 차수시공중 그라우팅 기둥의 시공순서를 도시한 공정도이며, 도 5는 본 발명에 따른 현장타설 콘크리트말뚝과 그라우팅 기둥을 이용한 주열식 토류벽의 차수 시공에 사용 되는 그라우팅 모니터를 도시한 예시도이며, 도 6은 본 발명에 따른 현장타설 콘크리트말뚝과 그라우팅 기둥을 이용한 주열식 토류벽의 차수 시공에 사용되는 슬라임처리판을 도시한 사시도이다.1 is a plan view showing the ordered soil wall using the cast-in-place concrete piles and grouting columns according to the present invention, Figure 2 is the order showing the column-type soil walls using cast-in-place concrete piles and grouting columns according to the present invention 3A to 3E are process diagrams illustrating a process of constructing a main column type earth wall using the cast-in-place concrete pile and grouting pillar according to the present invention, and FIGS. 4A to 4C illustrate the cast-in-place concrete pile according to the present invention. Process flow chart showing the construction sequence of grouting pillars during the order of the main heating type earth wall using the grouting column, Figure 5 shows a grouting monitor used for the order construction of the main heating earth wall using the cast-in-place concrete pile and grouting column according to the present invention 6 is an exemplary view, Figure 6 is a cast-in-place concrete pile and grout according to the present invention A perspective view of the slime treatment plate is used to order the main construction of the thermal type using the toryubyeok pillar.

이들 도면에 도시된 바와 같이, 본 발명에 따른 현장타설 콘크리트말뚝과 그라우팅 기둥을 이용한 주열식 토류벽 차수 시공방법은 지반(10)을 일정한 직경 및 깊이를 갖도록 굴착하여 굴착공(12)을 형성하면서, 상기 굴착공(12)에 강관케이싱(14)을 삽입하는 단계; 상기 굴착공(12) 내에 삽입된 강관케이싱(14) 내부의 슬라임을 외부로 반출하는 슬라임 제거단계; 상기 강관케이싱(14) 내에 철근망(16)을 삽입하거나, H빔(18)을 삽입하여 설치하는 단계; 상기 철근망(16) 또는 H빔(18)이 삽입된 굴착공(12)에 트레미관(20)을 설치하고, 상기 트레미관(20)에 콘크리트를 타설하면서 강관케이싱(14)을 상부로 인발하는 단계; 상기 타설된 콘크리트를 일정시간 양생시켜 현장타설 콘크리트말뚝(22)의 상부를 정리하고, 상기 현장타설 콘크리트말뚝(22) 상단에 캡빔(24)을 고정 설치하는 단계; 상기 현장타설 콘크리트말뚝(22)과 현장타설 콘크리트말뚝(22)과의 사이에 일정한 직경 및 깊이를 천공하여 그라우팅공(26)을 형성하고, 상기 그라우팅공(26)에 JSP장비(28)를 이용하여 Φ200㎜의 소구경으로 그라우트재를 혼합 충전하여 그라우팅 기둥(30)을 형성하는 단계로 이루어진다.As shown in these drawings, the main heat-type earth wall order construction method using the cast-in-place concrete pile and grouting column according to the present invention, while excavating the ground (10) to have a constant diameter and depth to form an excavation hole (12), Inserting a steel pipe casing (14) into the excavation hole (12); A slime removal step of carrying out the slime inside the steel pipe casing 14 inserted into the excavation hole 12 to the outside; Inserting the reinforcing steel net (16) into the steel pipe casing (14) or inserting and installing an H beam (18); Install the tremise tube 20 in the excavation hole 12 into which the rebar network 16 or the H beam 18 is inserted, and draws the steel pipe casing 14 to the upper portion while placing concrete in the tremi tube 20. Making; Curing the poured concrete for a predetermined time to clean up the upper portion of the cast-in-place concrete pile 22, and fix the cap beam 24 to the top of the cast-in-place concrete pile 22; The grouting hole 26 is formed by drilling a predetermined diameter and depth between the cast-in-place concrete pile 22 and the cast-in-place concrete pile 22, and using the JSP equipment 28 in the grouting hole 26. The mixture is filled with a grout material with a small diameter of Φ 200 mm to form a grouting pillar (30).

즉, 본 발명에 따른 현장타설 콘크리트말뚝과 그라우팅 기둥을 이용한 주열식 토류벽 차수 시공방법은 굴착 및 강관케이싱(14) 삽입단계; 슬라임 제거단계; 철근망(16) 또는 H빔(18) 설치단계; 콘크리트 타설 및 강관케이싱(14) 인발단계; 상기 현장타설 콘크리트말뚝(22) 형성단계; 상기 캡빔(24) 설치단계; 상기 그라우팅 기둥(30) 형성단계를 순차적으로 시행하여 주열식 토류벽(W)을 시공하는 것으로, 현장타설 콘크리트말뚝(22) 시공과 그라우팅 기둥(30) 시공을 조합하여 이루어진 토류벽 차수 시공방법이다.That is, the main heat-type earth wall order construction method using the cast-in-place concrete piles and grouting pillars according to the present invention includes excavation and inserting the steel pipe casing (14); Slime removal step; Installing the rebar network 16 or the H beam 18; Concrete pouring and steel pipe casing 14 drawing step; Forming the cast-in-place concrete piles 22; Installing the kaepbim 24; By performing the grouting pillar 30 forming step sequentially to construct the main heat-type earth wall (W), it is the earth wall order construction method made by combining the construction of the cast-in-place concrete pile 22 and the construction of the grouting pillar (30).

여기서, 상기 굴착 및 강관케이싱(14) 삽입단계는 지반(10)을 일정한 직경 및 깊이를 갖도록 굴착하여 굴착공(12)을 형성하면서, 상기 굴착공(12)에 강관케이싱(14)을 삽입하는 단계로서, 소정의 직경 및 깊이로 지반(10)을 굴착하여야 하며, 굴착공(12)의 붕괴를 방지하기 위하여 풍화토까지 강관케이싱(14)을 삽입한다.Here, the step of inserting the excavation and steel pipe casing 14 is to excavate the ground (10) to have a constant diameter and depth to form an excavation hole 12, inserting the steel pipe casing 14 into the excavation hole 12 As a step, the ground 10 should be excavated to a predetermined diameter and depth, and the steel pipe casing 14 is inserted to the weathered soil to prevent the collapse of the excavation hole 12.

굴착의 정도는 추기에 좌우되므로 굴착장비의 거치에 신중하여야 하며 현장타설 콘크리트말뚝(22) 및 H빔(18)의 수직도는 설치말뚝길이의 1/1000 미만이 유지되어야 한다.Since the degree of excavation depends on the additional weight, be careful to mount the excavation equipment, and the verticality of the cast-in-place concrete pile 22 and the H-beam 18 should be maintained at less than 1/1000 of the length of the installation pile.

또한, 상기 슬라임 제거단계는 굴착공(12) 내에 삽입된 강관케이싱(14) 내부의 슬라임을 외부로 반출하는 슬라임 제거단계로서, 콘크리트 타설 전에는 반드시 슬라임 처리를 완벽하게 하여야 하며, 슬라임 처리는 수중펌프 등을 사용하여 처리한다.In addition, the slime removal step is a slime removal step of carrying out the slime inside the steel pipe casing 14 inserted into the excavation hole 12 to the outside, and the slime treatment must be completely performed before the concrete is placed, and the slime treatment is an underwater pump Etc. to process.

이와 같이, 수중펌프에 의해서 외부로 배출된 슬라임은 그대로 방치할 경우에는 환경을 오염시킬 수 있으므로 육면체 형상으로 상부가 트이고, 측벽이 패널로 이루어지고, 내부에 칸막이가 매입된 슬라임처리판(36)에 채우고, 상기 슬라임에 경화제를 혼합하여 일정한 형상의 블록을 제조하는 것이 바람직하다.As described above, the slime discharged to the outside by the submersible pump may contaminate the environment if left untreated, and thus the slime treatment plate 36 having an upper part in the shape of a cube, a side wall consisting of a panel, and a partition embedded therein It is preferable to prepare a block of a constant shape by filling in and mixing a curing agent with the slime.

여기서, 상기 경화제는 일반적으로 건설분야에서 쓰이는 것을 사용한다.Here, the hardener is generally used in the construction field.

그리고 상기 철근망(16) 또는 H빔(18) 설치단계는 강관케이싱(14) 내에 철근망(16)이나 H빔(18)을 삽입하여 설치하는 단계로서, 철근망(16)이나 H빔(18)을 조립하여 정확하게 굴착공(12)에 삽입하여야 하며 철근망(16)의 연결은 가스압접을 H빔(18)은 철판 덧대기 용접을 원칙으로 한다.The reinforcing bar 16 or H beam 18 is installed by inserting the reinforcing bar 16 or the H beam 18 into the steel pipe casing 14 and installs the reinforcing bar 16 or the H beam 18. 18) should be assembled and inserted into the excavation hole (12) correctly, the connection of the reinforcing bar 16 should be gas pressure welding, H-beam 18 is iron plate welding in principle.

또 다른 방법으로 철근망(16) 또는 H빔(18)을 일체화시켜 변위를 방지하기 위하여 H빔(18) 또는 철근망(16)에 강판 등의 필러재를 부착해야 한다.In another method, a filler material such as a steel sheet must be attached to the H beam 18 or the rebar network 16 to integrate the rebar net 16 or the H beam 18 to prevent displacement.

H빔(18)을 삽입한 굴착공(12)은 현장타설 콘크리트말뚝(22) 심도 0.5m 하부까지 모래 채움을 실시하여야 하며 그 위에 시멘트 모르타르를 50cm 채운다.The excavation hole 12 into which the H beam 18 is inserted should be filled with sand to a depth of 0.5 m below the site-cast concrete pile 22, and 50 cm of cement mortar is filled thereon.

H빔(18) 및 철근망(16) 건입시는 굴착공(12)이 붕괴되지 않도록 서서히 삽입하며 피복 확보를 위해 강판 등의 간격재를 부착할 수 있다.When the H beam 18 and the reinforcing bar 16 are inserted, the drilling hole 12 may be slowly inserted so as not to collapse, and a spacer such as a steel sheet may be attached to secure the coating.

또한, 상기 콘크리트 타설 및 강관케이싱(14) 인발단계는 철근망(16) 또는 H빔(18)이 삽입된 굴착공(12)에 트레미관(20)을 설치하고, 상기 트레미관(20)에 콘크리트를 타설하면서 강관케이싱(14)을 상부로 인발하는 단계로서, 철근망(16) 또는 H빔(18)의 굴착공(12) 내의 설치가 완료되면 트레미관(20)을 설치하고 콘크리트를 굴착공(12) 바닥으로부터 타설한다. In addition, the concrete placing and steel pipe casing 14 drawing step is installed in the excavation hole 12, the reinforcing bar 16 or the H beam 18 is inserted into the tremi tube 20, the tremi tube 20 As the concrete is poured, the steel pipe casing 14 is drawn upward. When the installation is completed in the excavation hole 12 of the reinforcing steel net 16 or the H beam 18, the tremi tube 20 is installed and the concrete is excavated. The ball 12 is poured from the bottom.

콘크리트 타설은 1굴착공(12)이 완전히 충전이 완료될 때까지 연속해서 타설하여야 하며, 이때 트레미관(20)의 하단은 타설된 콘크리트에 1.0m 정도 묻힌 상태에서 타설되어야 한다. 타설된 콘크리트가 경화될 때까지 콘크리트에 영향을 주는 굴착은 피해야 한다. Concrete pouring should be poured continuously until the excavation hole (12) is completely filled, the bottom of the tremic tube 20 should be poured in the 1.0m buried in the poured concrete. Excavations affecting the concrete should be avoided until the cast concrete has hardened.

H빔(18)이 건입되는 굴착공(12)의 트레미관(20)의 콘크리트 타설이 곤란한 경우 또는 굴착공(12) 내부로 지하수 유입량이 많아 레미콘 타설이 곤란한 경우에는 프리팩트 콘크리트를 타설할 수 있다. Precast concrete can be poured when it is difficult to place concrete in the tremic tube 20 of the excavation hole 12 to which the H beam 18 is inserted, or when it is difficult to place the ready-mixed concrete due to a large amount of groundwater inflow into the excavation hole 12. have.

특히 콘크리트는 레미콘을 사용하고 골재의 최대지수는 25mm로 한다. 현장타설 콘크리트말뚝(22) 타설용 콘크리트의 기준강도는 σck=210kg/㎠이고 표준 슬럼프치는 12cm이어야 한다. 단, 굴착공(12) 내에 잔류된 지하수가 많아 콘크리트의 품질이 저하될 우려가 있을 때는 레미콘에 시멘트량을 30% 할증하거나 설계기준강도 σck=240kg/㎠ 이상 규격을 사용한다. In particular, concrete is used for concrete and the maximum index of aggregate is 25mm. Cast-in-place concrete pile (22) The standard strength of the concrete for pouring should be σck = 210kg / ㎠ and the standard slump should be 12cm. However, when there is a concern that the quality of the concrete may be deteriorated due to the large amount of groundwater remaining in the excavation hole 12, a 30% increase in the amount of cement is added to the ready-mixed concrete, or the design reference strength σck = 240kg / ㎠ or more.

또한, 상기 캡빔(24) 설치단계는 상기 타설된 콘크리트를 일정시간 양생시켜 현장타설 콘크리트말뚝(22)의 상부를 정리하고, 상기 현장타설 콘크리트말뚝(22) 상단에 캡빔(24)을 고정 설치하는 단계로서, 현장타설 콘크리트말뚝(22)의 시공이 완료되면 캡빔(24)을 설치하기 위하여 현장타설 콘크리트말뚝(22)의 두부정리를 하여야 하며, 현장타설 콘크리트말뚝(22)의 두부정리가 완료되면 각 현장타설 콘크리트말뚝(22)을 상부에서 일체화시키도록 캡빔(24)을 설치한다.In addition, the step of installing the kaepbim 24 cures the pour concrete for a predetermined time to clean up the upper portion of the cast-in-place concrete piles 22, the kaepbim 24 is fixed to the top of the cast-in-place concrete piles 22 As a step, when the construction of the cast-in-place concrete piles 22 is completed, the head of the cast-in-place concrete piles 22 is to be installed in order to install the cap beam 24, and when the head of the cast-in-place concrete piles 22 is completed, The kaepbim 24 is installed to integrate each of the cast-in-place concrete piles 22 from the top.

한편, 상기 현장타설 콘크리트말뚝(22)과 현장타설 콘크리트말뚝(22) 사이 배면에는 그라우팅 기둥(30)의 시공을 위하여 현장타설 콘크리트말뚝(22) 시공 후 그라우팅 기둥(30)의 천공포인트(40)를 표시하는 단계를 추가한다.On the other hand, the drilling point of the grouting pillars 30 after the construction of the cast-in-place concrete piles 22 for the construction of the grouting pillars 30 on the back surface between the cast-in-place concrete piles 22 and the cast-in-place concrete piles 22. Add a step to display.

이는 현장타설 콘크리트말뚝(22)과 현장타설 콘크리트말뚝(22) 사이 배면에는 그라우팅 기둥(30)의 시공을 위하여 정확한 천공포인트(40)를 선정함에 있어서 당초에 도면에 의거하여 측량한 것과 현장타설 콘크리트말뚝(22) 시공한 위치가 지장물이 있거나 시공 오차로 인하여 변경될 수 있고, 또한 현장타설 콘크리트말 뚝(22) 시공 후 주변지반이 고결된 상태에서 그라우팅 기둥(30)의 천공포인트를 파악하기가 곤란하므로 선시공 한 현장타설 콘크리트말뚝(22)의 시공 즉시 현장타설 콘크리트말뚝(22)과 현장타설 콘크리트말뚝(22) 간의 정확한 중간지점에 천공포인트(40)를 표시해 둠으로써, 그라우팅 기둥(30)을 원활하게 시공하기 위함이다.This is based on the initial measurement based on the drawing in selecting the correct drilling point 40 for the construction of the grouting column 30 on the backside between the cast-in-place concrete pile 22 and the cast-in-place concrete pile 22. The location of the pile 22 can be changed due to obstacles or construction errors, and also to determine the puncturing point of the grouting column 30 in the state where the surrounding ground is fixed after the construction of the site-cast concrete pile 22. Since it is difficult to pre-install the cast-in-place concrete pile 22, the grouting column 30 is displayed by marking the drilling point 40 at the exact intermediate point between the cast-in-place concrete pile 22 and the cast-in-place concrete pile 22. This is to smoothly construct.

또한, 상기 그라우팅 기둥(30) 형성단계는 현장타설 콘크리트말뚝(22)의 일측에 일정한 직경 및 깊이를 천공하여 그라우팅공(26)을 형성하고, 상기 그라우팅공(26)에 JSP장비(28)를 이용하여 그라우트재를 충전 및 양생시켜 그라우팅 기둥(30)을 형성하는 단계이다.In addition, the grouting pillar 30 forming step is to form a grouting hole 26 by drilling a predetermined diameter and depth on one side of the cast-in-place concrete pile 22, JSP equipment 28 to the grouting hole (26) It is a step of forming a grouting pillar 30 by filling and curing the grout material using.

즉, 현장타설 콘크리트말뚝(22)과 현장타설 콘크리트말뚝(22) 사이에서 차수가 되게끔 그라우팅 기둥(30)을 시공하되, 상기 그라우팅 기둥(30)의 형성에 사용되는 장비는 설계조건, 지층 및 지하수의 상태 현장타설 콘크리트말뚝(22)의 시공조건 등을 고려하여 적합한 것을 사용한다. That is, the construction of the grouting column 30 to be ordered between the cast-in-place concrete pile 22 and the cast-in-place concrete pile 22, the equipment used for the formation of the grouting pillar 30 is a design condition, geologic and In consideration of the construction conditions, such as the condition of the groundwater cast-in-place concrete piles 22 are used.

그라우팅을 위해 지반(10)을 수직으로 천공하고 주입장비는 JSP장비(28)를 사용하고 물 또는 시멘트 페이스트의 분사시 노즐 1개소의 상용 토출압이 15~30kg/㎠, 상용 토출량이 8~12개의 노즐에서 분당 30~90ℓ의 능력이 있는 것을 사용한다. For grouting, the ground 10 is vertically drilled and the injection equipment uses JSP equipment 28. When spraying water or cement paste, the commercial discharge pressure of one nozzle is 15-30 kg / ㎠, and the commercial discharge amount is 8-12. Use 30 to 90 liters per minute with two nozzles.

발전기는 고압전류를 사용하므로 누전의 위험이 없어야 한다. JSP장비(28)의 로드(34)가 중압의 노즐(32, 2.0mm×8~12개)이 방사상 반복 분사하여 균일한 파쇄효과로서 확실한 구근형성과 조기 차수, 주입재 유출 방지를 하여야 한다. The generator uses a high voltage current, so there should be no risk of leakage. The rod 34 of the JSP equipment 28 is sprayed radially repeatedly by medium pressure nozzles (32, 2.0mm × 8 ~ 12) to ensure the formation of uniform bulbs, early order, and prevention of injection material leakage.

작업 전 로드(34)의 회전수 및 인발속도를 지층 구성 상태에 따라 소정의 수치에 맞춘다. The rotation speed and the drawing speed of the rod 34 before the operation are adjusted to predetermined values according to the state of the strata configuration.

중, 고압 펌프에서는 지반(10) 천공시 절삭하기 위하여 공급하던 물을 특수 선단 장치로 시멘트 페이스트로 바꾸고 사용기준 노즐 1개소의 압력인 15~30kg/㎠가 될 때까지 서서히 압력도 높이되 지층의 구성 상태와 성과이용목적 및 사용장비 능력에 따라 증감시킬 수 있다. In the medium and high pressure pump, the water supplied for cutting during the drilling of the ground 10 is changed to cement paste by a special tip device, and the pressure is gradually increased until the pressure of one nozzle is 15-30 kg / ㎠. It can be increased or decreased depending on the configuration and performance purpose and the equipment used.

배출된 소량의 슬라임은 폐기물 처리장 내로 처리토록 한다. Small amounts of slime discharged are to be disposed of in the waste treatment plant.

여기서, 상기 슬라임은 현장타설 콘크리트말뚝(22)의 시공과 마찬가지로 그대로 방치할 경우에는 환경을 오염시킬 수 있으므로 일정한 형틀에 슬라임을 채우고, 경화제를 혼합하여 일정한 형상의 블록을 제조한다.Here, the slime is contaminated with the environment if left as it is, such as the construction of the cast-in-place concrete piles 22, filling the slime in a predetermined mold, and mixing the curing agent to produce a block of a predetermined shape.

한편, 상기 로드(34)의 인발시 한 계단(1step)의 높이는 100mm를 기준으로 하되 개량범위 200mm를 위해서 지층 구성상태 및 시험시공 결과에 따라 조정할 수 있다.On the other hand, the height of the step (1 step) when the rod 34 is drawn out based on 100mm can be adjusted according to the strata configuration and test construction results for the improvement range 200mm.

이때, 사용되는 그라우트재로는 실리카졸 계통의 용액 WGS-C1을 사용한다.In this case, the grout material used is a solution of silica sol-based WGS-C1.

배합수는 청수 사용을 기준으로 하되, 현장 여건에 따라 해수를 사용할 수 있다.Formulated water is based on fresh water, but seawater may be used depending on site conditions.

배합비는 공사의 목적에 따라 결정하여 사용한다.The compounding ratio is determined and used according to the purpose of the construction.

표준배합표는 아래와 같다.The standard formula is shown below.

유속이 빠른 자갈, 전석층에서 주입재 유실이 없게 경화재와 순결성 약액인 WGS-C1의 배합비를 적정하게 조절한다.The mixing ratio of hardening material and WGS-C1, a purity chemical, is adjusted appropriately so that there is no loss of injection material in the high-speed gravel and stone layers.

분사압력(15~30kg/㎠)이 크므로 현장타설 콘크리트말뚝(22)의 벽면을 치핑하듯 잘게 파쇄하여 현장타설 콘크리트말뚝(22)과 그라우팅공(26)의 접착력 증대로 차수 효과를 취하여야 하므로 현장타설 콘크리트말뚝(22) 양생 전에 시공함이 바람직하다.Since the injection pressure (15 ~ 30kg / ㎠) is large, it should be crushed finely as if chipping the wall surface of the site-cast concrete pile 22 to take the order effect by increasing the adhesion between the site-cast concrete pile 22 and the grouting hole (26) It is preferable to install before curing the cast-in-place concrete pile 22.

WGS-C1약액은 실리카졸로서 나트륨이 용탈이 되지 않아 내구성이 있고 중금속이 검출되지 않고 어독성 시험에서도 이상없는 환경 친화적인 주입재이어야 한다.WGS-C1 is a silica sol, which should be an environmentally friendly injection material that is durable due to no dissolution of sodium, no heavy metals detected, and no abnormality in fish toxicity test.

도 1은 본 발명에 따른 현장타설 콘크리트말뚝과 그라우팅 기둥을 이용한 주열식 토류벽을 도시한 시공 평면도,1 is a construction plan view showing a column-type soil wall using a cast-in-place concrete pile and grouting column according to the present invention;

도 2는 본 발명에 따른 현장타설 콘크리트말뚝과 그라우팅 기둥을 이용한 주열식 토류벽을 도시한 시공 측면도,Figure 2 is a side view showing the construction of the column-type soil wall using a cast-in-place concrete pile and grouting column according to the present invention,

도 3a 내지 3e는 본 발명에 따른 현장타설 콘크리트말뚝과 그라우팅 기둥을 이용하여 주열식 토류벽 시공중 현장 타설 콘크리트 말뚝(CIP)의 시공순서를 도시한 공정도,3a to 3e is a process chart showing the construction sequence of the cast-in-place concrete pile (CIP) during the construction of the main column type earth wall using the cast-in-place concrete pile and grouting column according to the present invention,

도 4a 내지 4c는 본 발명에 따른 현장타설 콘크리트말뚝과 그라우팅 기둥을 이용한 주열식 토류벽 시공중 차수 그라우팅 기둥의 시공순서를 도시한 공정도,4a to 4c is a process chart showing the construction sequence of the order grouting column during the construction of the main column type earth wall using the cast-in-place concrete pile and grouting column according to the present invention,

도 5는 본 발명에 따른 현장타설 콘크리트말뚝과 그라우팅 기둥을 이용한 주열식 토류벽의 시공에 사용되는 그라우팅 모니터를 도시한 예시도,Figure 5 is an exemplary view showing a grouting monitor used for the construction of the main column type earth wall using the cast-in-place concrete pile and grouting column according to the present invention,

도 6은 본 발명에 따른 현장타설 콘크리트말뚝과 그라우팅 기둥을 이용한 주열식 토류벽의 시공에 사용되는 슬라임처리판을 도시한 사시도.Figure 6 is a perspective view showing a slime treatment plate used in the construction of the main-heated earth wall using the cast-in-place concrete pile and grouting column according to the present invention.

-도면의 주요부분에 대한 부호의 설명-Explanation of symbols on the main parts of the drawing

10: 지반 12: 굴착공10: ground 12: excavator

14: 강관케이싱 16: 철근망14: Steel pipe casing 16: Rebar network

18: H빔 20: 트레미관18: H beam 20: tremi tube

22: 현장타설 콘크리트말뚝 24: 캡빔22: cast-in-place concrete pile 24: kap beam

26: 그라우팅공 28: JSP장비26: grouting ball 28: JSP equipment

30: 그라우팅기둥 32: 노즐30: grouting pillar 32: nozzle

34: 로드 36: 슬라임처리판34: Rod 36: Slime Plate

40: 천공포인트 W: 주열식 토류벽 40: perforation point W: columnar earth wall

Claims (5)

지반(10)을 일정한 직경 및 깊이를 갖도록 굴착하여 굴착공(12)을 형성하면서, 상기 굴착공(12)에 강관케이싱(14)을 삽입하는 단계; Inserting a steel pipe casing (14) into the excavation hole (12) while digging the ground (10) to have a constant diameter and depth to form an excavation hole (12); 상기 굴착공(12) 내에 삽입된 강관케이싱(14) 내부의 슬라임을 외부로 반출하는 슬라임 제거단계; A slime removal step of carrying out the slime inside the steel pipe casing 14 inserted into the excavation hole 12 to the outside; 상기 강관케이싱(14) 내에 철근망(16)을 삽입하거나, H빔(18)을 삽입하여 설치하는 단계; Inserting the reinforcing steel net (16) into the steel pipe casing (14) or inserting and installing an H beam (18); 상기 철근망(16) 또는 H빔(18)이 삽입된 굴착공(12)에 트레미관(20)을 설치하고, 상기 트레미관(20)에 콘크리트를 타설하면서 강관케이싱(14)을 상부로 인발하는 단계; Install the tremise tube 20 in the excavation hole 12 into which the rebar network 16 or the H beam 18 is inserted, and draws the steel pipe casing 14 to the upper portion while placing concrete in the tremi tube 20. Making; 상기 타설된 콘크리트를 일정시간 양생시켜 현장타설 콘크리트말뚝(22)의 상부를 정리하고, 상기 현장타설 콘크리트말뚝(22) 상단에 캡빔(24)을 고정 설치하는 단계; Curing the poured concrete for a predetermined time to clean up the upper portion of the cast-in-place concrete pile 22, and fix the cap beam 24 to the top of the cast-in-place concrete pile 22; 상기 현장타설 콘크리트말뚝(22)과 현장타설 콘크리트말뚝(22) 사이 배면에는 그라우팅 기둥(30) 시공을 위하여 현장타설 콘크리트말뚝(22) 시공 후, 그라우팅 기둥 천공포인트(40)를 표시하는 단계;Displaying the grouting pillar boring point 40 after construction of the cast-in-place concrete pile 22 for the construction of the grouting pillar 30 on the rear surface between the cast-in-place concrete pile 22 and the cast-in-place concrete pile 22; 상기 현장타설 콘크리트말뚝(22)과 현장타설 콘크리트말뚝(22)과의 사이에 일정한 직경 및 깊이를 천공하여 그라우팅공(26)을 형성하고, 상기 그라우팅공(26)에 JSP장비(28)를 이용하여 Φ200㎜의 소구경으로 그라우트재를 혼합 충전하여 그라우팅 기둥(30)을 형성하는 단계로 이루어지고,The grouting hole 26 is formed by drilling a predetermined diameter and depth between the cast-in-place concrete pile 22 and the cast-in-place concrete pile 22, and using the JSP equipment 28 in the grouting hole 26. And mixing and filling the grout material with a small diameter of Φ 200 mm to form a grouting pillar 30, 상기 외부로 반출된 슬라임은 육면체 형상으로 상부가 트이고, 측벽이 패널로 이루어지고, 내부에 칸막이가 매입된 슬라임처리판(36)에 채우고, 상기 슬라임에 경화제를 혼합하여 일정한 형상의 블록을 제조하며,The slime carried out to the outside is a hexahedron shape, the top is open, the side wall is made of a panel, the slime treatment plate 36 is filled with a partition therein, and the slime is mixed to prepare a block of a predetermined shape , 상기 JSP장비(28)는 그라우팅공(26) 천공시 지반(10) 절삭과 이완시킨 후 고압 제트 그라우팅기로서, 8~12개의 노즐(32)이 있는 로드(34)를 사용하여 분사와 혼합이 동시 진행되어 회전식 분사침투주입으로 지반(10) 내 그라우팅공(26)에 환경친화적 약액(WGS-C1)을 균일하게 중압 15~30kg/㎠으로 방사상 분사주입하는 침투와 혼합의 고강도 소일시멘트를 균일하게 형성함을 특징으로 하는 현장타설 콘크리트말뚝과 그라우팅 기둥을 이용한 주열식 토류벽 차수 시공방법.The JSP equipment 28 is a high-pressure jet grouting machine after cutting and relaxing the ground 10 when drilling the grouting hole 26, using a rod 34 having 8 to 12 nozzles 32 to be sprayed and mixed. Simultaneously proceeds with rotary jet penetration, uniformly injecting and mixing high-intensity soil cement with radial injection of environmentally friendly chemicals (WGS-C1) into the grouting hole 26 in the ground 10 at a medium pressure of 15 to 30 kg / cm2. A method for constructing a ordered earthquake earth wall using a cast-in-place concrete pile and grouting column, characterized in that it is formed. 삭제delete 삭제delete 삭제delete 삭제delete
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