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특수지반에서 쉴드TBM의 시공을 위한 기술적 고찰

Review of Technical Issues for Shield TBM Tunneling in Difficult Grounds

전석원|정호영|장난
한국암반공학회 (Korean Society for Rock Mechanics and Rock Engineering)|2018.02|터널과 지하공간 (TUNNEL AND UNDERGROUND SPACE)|제28권 제1호|pp. 1-24|DOI https://doi.org/10.7474/TUS.2018.28.1.001

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참고문헌

키워드

classification systemTBM복합지반분류기법단층파쇄대fault zone특수지반호박돌층difficult groundsmixed groundsboulder condition
주제분류자원공학

초록

국내외 터널공사에서 TBM(Tunnel Boring Machine)의 적용사례가 지속적으로 증가하고 있다. 이에따라 TBM터널은 더 어렵고 복잡한 특수지반을 대상으로 시공되는 사례가 많으며, 복잡한 지질 조건에기인한 시공상의 어려움이 꾸준히 보고되고 있는 실정이다. 국내에서는 아직까지 특수 지반의 효율적 통과에 대한 연구가 미진한 실정이다. 이 논문에서는 특수지반을 대상으로 하는 쉴드TBM 터널공사에서의지반조사와 시공과 관련된 사항에 대하여 고찰하였다. 국내외 특수지반을 통과한 시공 사례를 분석하여쉴드TBM 터널의 특수지반을 11개로 분류하였고, 각각의 특수지반의 개념과 일반적인 문제점들을 정리하였다. 특히 도심지 천층부에서 빈번하게 조우하는 복합지반, 호박돌층, 단층파쇄대의 분류 기법, 지반조사기법, 그리고 해당지반에서의 고려사항들을 논의하였고, 향후 연구방향에 대하여 제안하였다. 본논문은 특수지반에서의 TBM 시공기술 발전을 위한 기초연구로써 향후 관련 연구와 특수지반에서의TBM 시공에 도움이 될 것으로 기대된다.

Abstract

The use of TBM (tunnel boring machine) gradually increases in worldwide tunneling projects. TBM machine are often applied to more difficult and complex geological conditions in urban area, and many problems and difficulties have been reported due to these geological conditions. However, in Korea, there is a lack of research on difficult grounds so far. This paper discussed general aspects of investigation method, and problems of TBM tunneling in difficult grounds. Construction cases that passed through the difficult grounds in worldwide were analyzed and the typical difficult grounds were classified into 11 cases. For each case, the definition and general problems were summarized. Particularly, for mixed ground and boulder ground, and fault zone, which are frequent geological conditions in urban area with shallow depth, classification system, investigation methods and major considerations were discussed, and proposed the direction of future research. This paper is a basic study for the development of TBM construction technology in difficult ground, and it is expected that it will be useful for related research and construction of TBM in difficult ground in the future.

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