Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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A Study on Sites Application of Non-open-cut Tunnel Method with Slot Holes in Steel Pipe Pumping

강관압입후 슬롯 홀을 갖는 비개착 터널공법의 현장적용에 관한 연구

  • Chae, Young-Suk (Department of Architecture Engineering, Woosong University) ;
  • Song, Kwan-Kwon (Department of Civil Engineering, North Eastern University) ;
  • Min, In-Ki (Department of Railroad and Civil Engineering, Woosong Information University)
  • 채영석 (우송대학교 건축공학과) ;
  • 송관권 (동북대학자원여토목공정학원) ;
  • 민인기 (우송정보대학 철도토목과)
  • Received : 2014.10.03
  • Accepted : 2014.12.26
  • Published : 2015.02.28
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Abstract

In the study, a new non-open cut tunnel steel pipe method using slot hole has been developed. As is overcomes shortcomings of conventional methods, it is applied to the field. The main concept of the new method is the steel pipe pumping system with slot holes which, by means of formation slot holes between each steel pipe, applied to the magnitude of the relaxed earth pressure caused by excavation to the ground to prevent ground displacement. The stability of the support members and effect of displacement control of the new method were verified through several ways as numerical analysis and site test. The new method was applied to the construction of a 11.5m wide, 7.4m high and 50m long section that passes side subway and large buildings in inner city. By applying the new method, tunnel construction was successfully completed in 6 months. It decreases the construction period to 30% compared to that of conventional methods, and ground was almost negligible.

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