Proceedings of the Korean Geotechical Society Conference (한국지반공학회:학술대회논문집)
- 2006.10a
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- Pages.66-75
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- 2006
A Case Study on Construction of Tunnel at Limestone Cavity Site
석회암공동 분포지역에서의 터널 시공사례
- Kim, Si-Kyeok (Yongma Engineering Co., Ltd) ;
- Kang, In-Seop (Yongma Engineering Co., Ltd) ;
- Kim, Yong-Ha (Yongma Engineering Co., Ltd) ;
- Yoon, Il-Byung (Yongma Engineering Co., Ltd) ;
- Moon, Hoon-Ki (Yongma Engineering Co., Ltd)
- Published : 2006.10.27
Abstract
As construction for road tunnel is increasing, various geotechnical conditions can be faced during the construction stage. Especially, if the tunnel is located in limestone area, many kinds of site investigations such as in-situ boring, electrical resistance survey, TSP(Tunnel Seismic Prediction) and etc., are conducted before and during the construction. By conducting these preliminary tests, location, size, and filling materials in limestone cavities can be approximately estimated. Once some cavities which can be harmful for tunnel safety are predicted, methods for ground reinforcement and tunnel excavation, corresponding those ground conditions, have to be established and verified by measurement data and numerical analysis. If necessary, invert lining should be also considered. In this paper, by studying some cases of tunnels constructed in limestone area, predicted problems during construction and rational countermeasures for those are presented.
Keywords
- road tunnel;
- cavities in limestone area;
- site investigation;
- preliminary test;
- ground reinforcement;
- measurement;
- numerical analysis;
- invert lining