A Case Study of Soil-Cement Fill for Tunneling

소일시멘트 복토후 터널굴착에 대한 사례 연구

  • 신일재 (현대건설(주) 기술개발원) ;
  • 강준호 (현대건설(주) 기술개발원) ;
  • 서영호 (현대건설(주) 기술개발원)
  • Published : 2005.10.01

Abstract

In case the overburden of a tunnel is too low to adopt NATM, cut and cover method generally can be chosen as alternative. However, in tunneling some area with very low or no overburden between two mountains, the cut and cover method requires additional construction of a couple of tunnel portals and the maintenance of portal slopes until backfilling is completed. As a solution for this problem, increasing the tunnel overburden by raising the ground level can be effective. This paper presents the case study for tunneling at C240 site in Taiwan High Speed Railway(THSR) in which soil-cement filling method was used for pre-banking before tunnel excavation. Cement content of filling material was $2\~4\%$ and thickness of filling a round was $130\~250\;mm$. The stability evaluation for the soil-cement slope and concrete lining of low cover tunnel was conducted by numerical analysis.

References

  1. Hyundai-Chung Lin lV, 2001, Method Statement for Soil Cement Fill
  2. Hyundai-Chung Lin lV, 2003, Work Specification for Soil Cement Fill
  3. Hyundai-Chung Lin lV, 2002, Tungsiao NO.5 Tunnel Mined Section T09 - Inner Lining - Numerical Analysis
  4. Hyundai-Chung Lin JV, 2001, Tungsial No.5 Tunnel Mined Section T09 - Design and Analysis of Low Cover Section
  5. Hyundai-Chung Lin lV, 2002, Shihu No.2 Tunnel Mined Section T03 - Design and Analysis of Compacted Backfill
  6. THSR Contract C240, 2000, Design manual - volume 2, Mined Tunnel