KR20030016815A - Construction Method using Precast Concrete for Diaphragm Wall - Google Patents
Construction Method using Precast Concrete for Diaphragm Wall Download PDFInfo
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- KR20030016815A KR20030016815A KR1020010050580A KR20010050580A KR20030016815A KR 20030016815 A KR20030016815 A KR 20030016815A KR 1020010050580 A KR1020010050580 A KR 1020010050580A KR 20010050580 A KR20010050580 A KR 20010050580A KR 20030016815 A KR20030016815 A KR 20030016815A
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- excavation
- continuous wall
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Classifications
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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
- E02D5/20—Bulkheads or similar walls made of prefabricated parts and concrete, including reinforced concrete, in situ
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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
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
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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
- E02D5/62—Compacting the soil at the footing or in or along a casing by forcing cement or like material through tubes
Abstract
Description
본 발명은 도심지 지하 토공사시 인접건물의 안정성 확보와 흙벽의 무너져 내리는 것을 방지하기 위한 지하연속벽 시공방법에 관한 것으로, 보다 상세하게는 PC부재(Precast Concrete)를 지반에 미리 매설된 H빔에 단계적으로 삽입하여 지하연속벽을 시공할 수 있는 시공방법에 관한 것이다.The present invention relates to an underground continuous wall construction method for securing the stability of adjacent buildings and preventing the fall of soil walls during underground earthworks of urban areas. More specifically, the present invention relates to a PC beam (precast concrete) pre-embedded on the ground in stages. It relates to a construction method that can be inserted into the underground continuous wall construction.
일반적으로 자하연속벽 공법은 지반을 굴착함과 동시에 안정액(벤토나이트)을 굴착된 지반에 채워 넣어 굴착면의 붕괴를 방지한 후 지상에서 조립한 철근벽체를 굴착된 지반에 넣어 지하에서부터 콘크리트를 타설하는 작업을 반복함으로서 지중에 연속된 철근콘크리트벽을 형성하는 시공방법으로서, 이러한 시공방법은 일반터파기에 의한 공사보다 작업면적이 적게 소요되기 때문에 도심지 지하공사 등의 부지가 협소한 지역에서 집중적으로 시행되고 있으며, 도심지 지하 토공사시 인접건물의 안정성 확보와 최근 들어 지하굴착공사의 깊이가 깊어짐에 따라 흙막이벽의 높은 강성이 요구되므로 지하연속벽 시공이 증가되고 있다.In general, the self-continuous wall method is to excavate the ground and at the same time fill the stabilized liquid (bentonite) into the excavated ground to prevent the collapse of the excavation surface, and then install the reinforced concrete wall from the ground into the excavated ground to place concrete from the basement. As a construction method to form continuous reinforced concrete walls in the ground by repeating the work, this construction method requires less work area than the construction by general digging, so it is intensively carried out in the narrow area such as underground construction work in the city. In addition, the underground continuous wall construction is increasing due to the high rigidity of the retaining wall as the stability of the adjacent building is secured and the depth of the underground excavation is recently deepened.
그러나 상술한 지하연속벽 시공방법은 굴착시 굴삭면의 붕괴를 방지하기 위해 사용되는 안정액과 굴착된 미립토가 슬라임(Slime)으로 공존하여 콘크리트 타설시 콘크리트와 혼합되어 콘크리트의 내구성을 저하시키게 되며, 지하연속벽의 면처리를 위한 브레이커 작업과 지하층 슬라브(Slab)와 빔(Beam)을 연결하기 위한 다우엘 바(Dowel bar)시공을 해야 함으로서 공사비 및 공사기간이 증대되고, 브레이커 작업에 의한 콘크리트 면의 불량, 지하연속벽의 수직도 불량, 콜드조인트와 같은 현상으로 인한 누수현상이 발생하는 등의 문제점이 있다.However, in the above-described underground continuous wall construction method, the stabilizer used to prevent the collapse of the excavated surface during the excavation coexists with the slime in the form of slimes, which is mixed with the concrete when the concrete is placed, thereby reducing the durability of the concrete. Breaker work for surface treatment of continuous continuous wall and Dowel bar construction for connecting slab and beams of basement floor should increase construction cost and construction period, and concrete surface by breaker work There is a problem such as a leak occurs due to a poor quality, poor verticality of the continuous continuous wall, such as cold joints.
본 발명은 상기와 같은 종래의 문제점을 해결하기 위하여 안출되는 것으로, 그 목적은 시공법의 단순화로 인해 공사기간을 단축할 수 있으며, 보다 안정적인 지하공사를 수행할 수 있도록 지하연속벽의 강성을 증가시킬 수 있는 PC부재를 이용한 지하연속벽 시공방법을 제공함에 있다.The present invention is devised to solve the conventional problems as described above, the object of which is to shorten the construction period due to the simplification of the construction method, to increase the rigidity of the underground continuous wall to perform a more stable underground construction It is to provide a method for constructing a continuous underground wall using a PC member that can be.
상기와 같은 목적 달성을 위한 본 발명은 굴착선정위치에 지반을 굴착하여 다수의 H빔을 소정간격으로 매설하고, 이렇게 매설된 H빔 사이에 미리 제작된 PC부재를 단계적인 굴착작업을 통해 삽입하는 것으로 이루어졌다.The present invention for achieving the above object is to excavate the ground at the excavation selection position to embed a plurality of H beams at predetermined intervals, and to insert the PC member prepared in advance between the embedded H beam through the stepwise excavation work Consisted of.
도 1 은 본 발명의 시공방법 중 제 1 단계를 나타낸 예시도1 is an exemplary view showing a first step of the construction method of the present invention
도 2 는 본 발명의 시공방법 중 제 2 단계를 나타낸 예시도Figure 2 is an exemplary view showing a second step of the construction method of the present invention
도 3 은 본 발명의 시공방법 중 제 3 단계를 나타낸 예시도3 is an exemplary view showing a third step of the construction method of the present invention
도 4 는 본 발명의 시공방법 중 제 4 단계를 나타낸 예시도Figure 4 is an exemplary view showing a fourth step of the construction method of the present invention
도 5 는 본 발명의 시공방법 중 제 5 단계를 나타낸 예시도5 is an exemplary view showing a fifth step of the construction method of the present invention
도 6 은 본 발명의 시공방법 중 제 6 단계를 나타낸 예시도6 is an exemplary view showing a sixth step in the construction method of the present invention;
도 7 은 제 5 단계와 제 6 단계를 단계적으로 반복하여 PC부재가 H빔에 완전히 삽입된 상태를 나타낸 예시도7 is an exemplary view showing a state in which the PC member is completely inserted into the H beam by repeating the fifth and sixth steps step by step;
도 8 은 PC부재에 매입설치된 주입관에 시멘트 페이스트를 주입하는 과정을 나타낸 예시도8 is an exemplary view showing a process of injecting cement paste into an injection tube embedded in a PC member.
도 9 는 본체 지하 구조물 기초 콘크리트를 타설한 상태를 나타낸 예시도9 is an exemplary view showing a state in which the foundation of the basement structure of the body underground;
도 10 은 옴니어 근이 배근된 PC부재를 나타낸 예시도10 is an exemplary view showing a PC member in which the omni muscles are placed
<도면의 주요부분에 대한 부호의 설명><Description of the symbols for the main parts of the drawings>
(1) : PC부재(Precast Concrete) (2) : 옴니어 근(1): Precast Concrete (2): Omni-near
(3) : H빔 (4) : 철근(3): H beam (4): rebar
(5) : 굴착공 (6) : 바렛트(Barrette) 기초 콘크리트(5) Excavation holes (6): Barrette foundation concrete
(7) : 콩자갈 (8) : 본체 지하 구조물 기초 콘크리트(7): soybean gravel (8): the basement structure of the basement body
(9) : 홈 (10) : 지반(9): home (10): ground
(11) : 삽입부 (12) : 주입관(11): Insertion portion 12: Injection tube
본 발명의 구성에 대해 첨부도면과 연계하여 설명하면 다음과 같다.Referring to the configuration of the present invention in conjunction with the accompanying drawings as follows.
도 1 은 본 발명의 시공방법 중 제 1 단계를 나타낸 예시도를, 도 2 는 본 발명의 시공방법 중 제 2 단계를 나타낸 예시도를, 도 3 은 본 발명의 시공방법 중 제 3 단계를 나타낸 예시도를, 도 4 는 본 발명의 시공방법 중 제 4 단계를 나타낸 예시도를, 도 5 는 본 발명의 시공방법 중 제 5 단계를 나타낸 예시도를, 도 6 은 본 발명의 시공방법 중 제 6 단계를 나타낸 예시도를, 도 7 은 제 5 단계와 제 6 단계를 단계적으로 반복하여 PC부재가 H빔에 완전히 삽입된 상태를 나타낸 예시도를, 도 8 은 PC부재에 매입설치된 주입관에 시멘트 페이스트를 주입하는 과정을 나타낸 예시도를, 도 9 는 본체 지하 구조물 기초 콘크리트를 타설한 상태를 나타낸 예시도를, 도 10 은 옴니어 근이 배근된 PC부재를 나타낸 예시도를 도시한 것으로, 본 발명은 굴착위치를 선정하고 선정된 위치를 굴착하여 굴착공(5)을 형성하는 제 1 단계와, 하단부에 철근(4)이 배근된 H빔(3)을 굴착공(5)에 삽입하는 제 2 단계와, 상기 H빔(3)의 하단부에 배근된 철근(4)에 콘크리트를 타설하여 바렛트 기초 콘크리트(6)를 형성하는 제 3 단계와, 상기 바렛트 기초 콘크리트(6) 경화 후 굴착시 발생되는 H빔의 변형을 방지하기 위해 굴착공(5)에 콩자갈(7)을 매입하는 제 4 단계와, 상기 H빔(3)의 상단부의 지반(10)으로부터 소정깊이 만큼 터파기 작업을 시행하는 제 5 단계와, 상기 터파기 작업에 의해 돌출된 H빔(3)에 삽입되도록 미리제작된 PC부재(1)를 삽입하는 제 6 단계로 구성되며, 상기 제 5 단계와 제 6 단계를 단계적으로 반복 시행하여 시공깊이까지 PC부재(1)가 삽입한 후, 상기 PC부재(1)의 삽입부(11)에 매입설치된 주입관(12)에 시멘트 페이스트(Cement Paste)를 주입하고, 본체 지하 구조물 기초 콘크리트(8)를 타설함으로써 시공을 완료하게 된다.1 is an exemplary view showing a first step of the construction method of the present invention, Figure 2 is an exemplary view showing a second step of the construction method of the present invention, Figure 3 shows a third step of the construction method of the present invention 4 is an exemplary view showing a fourth step of the construction method of the present invention, Figure 5 is an exemplary view showing a fifth step of the construction method of the present invention, Figure 6 is a first view of the construction method of the present invention 6 is an exemplary view showing a sixth step, Figure 7 is an exemplary view showing a state in which the PC member is completely inserted into the H beam by repeating the fifth step and the sixth step, Figure 8 is an injection tube embedded in the PC member 9 is an exemplary view showing a process of injecting cement paste, FIG. 9 is an exemplary view showing a state in which the foundation concrete is poured into the main body underground structure, and FIG. 10 is an exemplary view showing a PC member in which an omni muscle is placed. The present invention selects the excavation position A first step of excavating the position to form the excavation hole 5, a second step of inserting the H beam 3 in which the reinforcing bar 4 is arranged at the lower end into the excavation hole 5, and the H beam 3 The third step of forming concrete on the rebar 4 arranged at the lower end of the bar) to form the Barrett foundation concrete (6), and to prevent deformation of the H beam generated during excavation after curing the Barrett foundation concrete (6) A fourth step of purchasing soybean gravel (7) in the excavation hole (5), a fifth step of carrying out a scavenging operation by a predetermined depth from the ground (10) of the upper end of the H beam (3), and It consists of a sixth step of inserting a PC member (1) pre-fabricated to be inserted into the H-beam (3) protruding by the excavation operation, and repeatedly carried out the fifth step and the sixth step to the construction depth After the PC member 1 is inserted, cement paste is injected into the injection tube 12 embedded in the insertion portion 11 of the PC member 1. And, thereby complete the construction by placing the main underground structures foundation concrete (8).
이하, 본 발명의 실시예를 첨부도면과 연계하여 상세히 설명하면 다음과 같다.Hereinafter, an embodiment of the present invention will be described in detail with reference to the accompanying drawings.
도 1 ~ 도 9 는 본 발명에 따른 시공과정을 나타내고 있다.1 to 9 show the construction process according to the present invention.
우선, H빔(3)이 설치될 위치를 선정하고 안정액을 주입하며 해머그라브(Hammer Grab)를 이용하여 굴착작업을 실시한다. 이와 같이 굴착공(5)이 소정간격 이격되어 굴착되면 철근(4)이 하단부에 배근된 H빔(3)을 굴착공(5)에 삽입하되, 안정액의 주입에 따라 생성된 슬라임을 제거하도록 한다. 이후 H빔(3)의 하단부에 배근된 철근(4)에 콘크리트를 타설하여 바렛트 기초 콘크리트(6)를 형성하며, 바렛트 기초 콘크리트(6)가 경화되면 콩자갈(7)을 굴착공(5)에 매입하고, 터파기 작업이 시행될 부분의 반대편에 그라우팅 작업을 실시한다.First, the position where the H beam 3 is to be installed is selected, a stabilizer is injected, and an excavation operation is performed by using a hammer grab. As such, when the excavation hole 5 is excavated at a predetermined interval, the reinforcing bar 4 inserts the H beam 3 arranged at the lower end into the excavation hole 5 to remove the slime generated by the injection of the stabilizer. . Thereafter, concrete is poured into the reinforcing bars 4 arranged at the lower end of the H beam 3 to form the Barrett foundation concrete 6, and when the Barrett foundation concrete 6 is cured, the bean gravel 7 is drilled ( 5) and grouting on the opposite side of the area where the excavation work will be carried out.
한편, 지중에 매설된 H빔(3)에 삽입될 PC부재(1)는 지하구조물의 규모에 따라 미리 제작하며, 도 10에 도시된 것과 같이 H빔(3)에 삽입되는 삽입부(11)가 양측에 형성되고, H빔(3)과 PC부재(1)의 차수성을 향상시키기 위해 PC부재(1)의 상면으로부터 측면으로 연결되는 주입관(12)을 매입설치하며, 지하 슬래브와 빔을 연결을 고려하여 옴니어 근(2)을 전면부로 돌출되게 배근하여 지하층 슬라브 및 빔과 연결함으로서 미도시된 슬라브 및 빔을 연결하기 위한 별도의 작업이 필요치 않으며, 이러한 PC부재(1)의 사용은 슬라임과 콘크리트의 혼합에 의해 콘크리트의 내구성이 저하되는 것을 방지하여 보다 견고한 지하연속벽을 시공할 수 있는 것이다.Meanwhile, the PC member 1 to be inserted into the H-beam 3 embedded in the ground is prepared in advance according to the size of the underground structure, and the insertion portion 11 is inserted into the H-beam 3 as shown in FIG. 10. Are formed on both sides, and the injection pipe 12 connected to the side surface from the upper surface of the PC member 1 is installed in order to improve the orderability of the H beam 3 and the PC member 1, and the underground slab and the beam are installed. Considering the connection, the omnier root 2 is projected to the front part to connect with the basement slab and the beam, so that no separate work for connecting the slab and the beam is not required. It is possible to construct a more solid underground continuous wall by preventing the durability of the concrete is lowered by mixing the slime and concrete.
상기 PC부재(1)를 지중에 매설된 H빔(3)에 삽입하기 위해 소정깊이로 터파기 작업을 시행하고, 미리 제작된 PC부재(1)를 H빔(3)의 사이에 삽입한다. 이와 같은 과정을 반복하여 PC부재(1)를 단계적으로 H빔(3) 사이에 삽입하여 지하연속벽을 구성하게 되며, 상기 PC재(1)에 매입설치된 주입관(12)에 시멘트 페이스트를 주입하거나 LW 그라우팅을 실시하여 삽입부(11)와 H빔(3)의 차수성을 향상시키고, 본체 지하 구조물 기초 콘크리트(8)를 옴니어 근(2)과 연결하여 타설함으로서 시공을 완료하게 되는 것이다.In order to insert the PC member 1 into the H-beams 3 embedded in the ground, a digging operation is carried out to a predetermined depth, and the PC member 1 prepared in advance is inserted between the H-beams 3. By repeating the above process, the PC member 1 is inserted between the H beams 3 step by step to form an underground continuous wall, and cement paste is injected into the injection pipe 12 embedded in the PC material 1. In addition, LW grouting is performed to improve the orderability of the insertion part 11 and the H beam 3, and to complete the construction by connecting the basement concrete 8 with the omni root 2 to the main body underground structure. .
이렇게 구성된 PC부재(1)의 연결부는 H빔(3)에 의해 연결되어 차수성이 확보됨과 동시에 수직방향의 홈(9)이 형성되어 이 부위가 지하층의 기둥부위일 경우 보조거푸집을 설치하여 콘크리트 타설이 용이하고, H빔(3)과 미도시된 지상구조물의 상부 기둥 H빔과 연결하여 지상공사와 지하공사가 동시에 가능하며, PC부재(1)의 내부에 옴니어 근(2)을 배근하여 시공하면 지하층 슬라브 및 빔과의 연결이 용이함과 동시에 지하 구조물의 강성을 보다 향상 시킬 수 있는 것이다.The connecting part of the PC member 1 configured as described above is connected by the H beam 3 to secure the order and the groove 9 in the vertical direction is formed. When this part is the pillar part of the basement floor, the auxiliary formwork is installed to Easy to pour, connected with H beam (3) and the upper pillar H beam of ground structure (not shown) to allow ground and underground work at the same time, and the omni root (2) is placed inside the PC member (1). If the construction is easy to connect with the basement slabs and beams, the rigidity of the underground structure can be further improved.
본 발명은 상술한 특정의 바람직한 실시예에 한정되지 아니하며, 청구범위에서 청구하는 본 발명의 요지를 벗어남이 없이 당해 고안이 속하는 기술분야에서 통상의 지식을 가진 자라면 누구든지 다양한 변형실시가 가능한 것은 물론이고, 그와 같은 변경은 청구범위 기재의 범위 내에 있게 된다.The present invention is not limited to the above-described specific preferred embodiments, and various modifications can be made by those skilled in the art without departing from the gist of the present invention as claimed in the claims. Of course, such changes will fall within the scope of the claims.
상기와 같이 본 발명은 PC부재를 사용하여 지하연속벽을 구성함에 따라 슬라임과 콘크리트의 혼합에 의해 콘크리트 내구성이 저하되는 것을 방지하고, 차수성이 우수하며, 지하연속벽의 면처리를 할 필요가 없고, 지하층 슬라브와 빔을 연결하기 위한 다우엘 바 시공이 불필요하여 공사비절감과 공사기간을 단축할 수 있는 효과가 있는 것이다.As described above, the present invention is to prevent the degradation of concrete durability by the mixing of slime and concrete, by constructing the underground continuous wall using a PC member, excellent in the degree of orderability, it is necessary to surface treatment of the underground continuous wall There is no need for construction of the Doubel Bar for connecting the basement slab and the beam, thereby reducing the construction cost and shortening the construction period.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| KR101322089B1 (en) * | 2012-06-12 | 2013-10-28 | 원창숙 | Precast concrete construction method for establishing structure in ground |
| CN110185026A (en) * | 2019-05-09 | 2019-08-30 | 中建八局第一建设有限公司 | A kind of diaphram wall and its construction method |
| KR102357963B1 (en) * | 2021-02-08 | 2022-02-08 | 주식회사 한화건설 | Earthquake resistant slurry wall structure |
| CN115045268A (en) * | 2022-07-08 | 2022-09-13 | 上海隧道工程有限公司 | Construction method of ultra-deep and ultra-thick underground continuous wall |
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| JPS55161117A (en) * | 1979-06-02 | 1980-12-15 | Ohbayashigumi Ltd | Constructing method for underground continuous wall by precast concrete member |
| JPS61134423A (en) * | 1984-12-04 | 1986-06-21 | Fujita Corp | Method of forming vertical joint for precast concrete underground continuous wall |
| JPH0711630A (en) * | 1993-06-25 | 1995-01-13 | Shimizu Corp | Method of underground continuous wall used for precast prestressed concrete slab wall |
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| KR101309360B1 (en) * | 2011-07-15 | 2013-09-17 | 단국대학교 산학협력단 | Nanocomposites comprising with calcium phosphate adsorbed modified carbon nanotubes and degradable polymer and method of preparing thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101322089B1 (en) * | 2012-06-12 | 2013-10-28 | 원창숙 | Precast concrete construction method for establishing structure in ground |
| CN110185026A (en) * | 2019-05-09 | 2019-08-30 | 中建八局第一建设有限公司 | A kind of diaphram wall and its construction method |
| CN110185026B (en) * | 2019-05-09 | 2024-03-22 | 中建八局第一建设有限公司 | Underground diaphragm wall and construction method thereof |
| KR102357963B1 (en) * | 2021-02-08 | 2022-02-08 | 주식회사 한화건설 | Earthquake resistant slurry wall structure |
| CN115045268A (en) * | 2022-07-08 | 2022-09-13 | 上海隧道工程有限公司 | Construction method of ultra-deep and ultra-thick underground continuous wall |
| CN115045268B (en) * | 2022-07-08 | 2023-09-05 | 上海隧道工程有限公司 | Construction method of ultra-deep and ultra-thick underground diaphragm wall |
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