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Mechanism Analysis of Tunnel Collapse in Weak Ground  

Lee, Jae-Ho ((주)메카지오텍 연구사업부)
Jeong, Yun-Young ((주)청석엔지니어링 터널사업부)
Kim, Young-Su (국립 경북대학교 토목공학과)
Moon, Hong-Duk (국립 진주산업대학교 토목공학과)
Publication Information
Tunnel and Underground Space / v.19, no.4, 2009 , pp. 339-347 More about this Journal
Abstract
Despite the recent improvement in tunnel excavation technique, Tunnel collapse accidents still happen. This paper suggest two typical cases in unconsolidated ground condition. Collapse causes of each case were analyzed by the measurement records and numerical simulation, and then mechanism of tunnel collapse was investigated about each case. From this study, the crucial indicators of tunnel collapse were the variation of shear strain and ground water level, also, tunnel collapse deeply related to how shear deformation around tunnel was developed according to the excavation step.
Keywords
unconsolidated ground; tunnel collapse; ground water level; shear strain; ground relaxation;
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  • Reference
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