• 레미콘
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• 1호통권70호
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• pp.73-79
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• 2002

• 건축구조
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• 제19권2호
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• pp.84-88
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• 2012

• 한국공간구조학회논문집
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• 제11권2호
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• pp.129-138
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• 2011

지하공사는 상부층의 구조물과 연계된 시공순서에 따라 Bottom-Up공법, Up-Up공법 그리고 Top-Down 공법으로 대별할 수 있다. 탑다운 공법을 사용하면 건물의 본구조를 흙막이지보공으로 이용하면서 상층에서 하층으로 굴착과 구체구축을 반복하여 시공함으로써 인접구조물이나 주변 지반의 변위를 극소화 시킬 수 있다. 이는 토류벽의 안정성이 높으며, 각층의 바닥슬래브를 작업공간으로 사용하여 도심지 공사에서 작업장 확보가 용이하다. 그러나 굴토작업이 슬래브 하부에서 진행되므로 작업 능률 및 작업환경이 저하되고, 어스앵커 공법보다 경제성이 없다는 이유로 다소 회피하는 경우가 종종있다. 따라서 본 논문에서는 터파기 공사는 세미오픈컷 공법을 적용하고 흙막이 공법에는 지하연속벽(슬러리월)을 그리고 지보공으로는 C.W.S공법을 적용한 역타공법으로 대상현장을 중심으로 기존 역타공법과 경제성, 공사기간 및 작업성 등을 분석 제시하였다. 토사운반 및 철골설치공사 작업의 용이성과 PRD 공사의 정밀도 향상 등의 품질관리가 우수하며, 공기단축이 가능하였다.

• 건설관리
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• 제11권4호
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• pp.21-25
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• 2010

• 한국공간구조학회지
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• 제12권1호
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• pp.20-24
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• 2012

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2008년도 춘계 학술논문 발표대회
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• pp.43-46
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• 2008

In Top-Down construction for underground structures, the placement of slab as a horizontal supporting member against lateral earth pressure is an important process in determining construction time and cost. Usually, a reinforced concrete perimeter girder distributes concentrated lateral loads from earth retaining structures such as Cast-in-place (CIP) piles. By combining the function of the R/C perimeter girder and horizontal slabs, the Opened Slab Method is efficient for reducing construction time by elimination of time-consuming formwork for traditional perimeter girders. The structural performance of the method is also discussed in this paper.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2006년도 추계 학술논문 발표대회 논문집
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• pp.9-12
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• 2006

In recent years, construction site has developed lots of new methods and materials for Time-Cost Trade-off and improving constructability. In the case of underground construction, especially, there are many restrictions and difficulties. Shortening of the construction time in construction of underground, we use top-down method in undergroud wall. A open slab has been designed for the purpose of overcoming a weak point of former top-down method. This study based on open slab on the under ground top-down method, to more improve constructability, to introduce the effect and the performance of top-down method.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2013년도 추계 학술논문 발표대회
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• pp.4-7
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• 2013

In recent downtown high land due to an increase in the utilization of land from the property line to maximize the proximity of the construction and use of underground structures has increased. The nature of urban underground retaining structure construction safety, environmental management, and civil contrast situations, construction periodt perspective, this method is widely used in the backhand. Recent Patents DP method and the method of the DBS method than in the SPS process is deleted according to the PRD process cost savings are generated. The workability and safety study of two kinds of method, such as air speed, and considering the reduction of indirect costs in terms of economic efficiency is considered to be a superior method.

• 대한건축학회논문집:구조계
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• 제35권6호
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• pp.101-109
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• 2019

The purpose of this study is to improve a general Top-Down construction process for superstructure construction period reduction. In a general Top-Down construction sequence, the ground floor slab is set up first. Subsequently, 1st basement level construction including core walls is constructed. Initiation of the ground level superstructure gets waited until then. In this study, removable deck plate installation on the bottom of the core walls of ground level is preceding the concrete casting, therefore, ground level superstructure construction is able to get started earlier. Up to first typical floor concrete casting, total of seventy-two working(calendar) days will be resulted in a reduction from the total construction periods.

• 한국건축시공학회:학술대회논문집
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• 한국건축시공학회 2021년도 봄 학술논문 발표대회
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• pp.180-180
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• 2021

Recently, structural damage and defect has occurred in the H-beam backfill installation part of Top-Down construction method. In order to secure structural safety and usability in the adjacent section of the backfilling method, It turns out that it is necessary to analyze by dividing into various cases. The H-beam backfill installation section is divided into the case of adding a vertical plate inside the slab, adding a shear stud, adding a reinforcing bar, changing the thickness of the pressure plate, and filling the H-beam backfill with mortar. Ansys modeling was performed and an appropriate solution was suggested by analysis.