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《Journal of Catastrophology》 2009-03
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Case-based Reasoning Assessment on Tunnel Collapse Risk of the Weathered Trough Section of Liuyang River Tunnel

An Yonglin1,2,Peng Limin2 and Zhang Feng3(1.School of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;2.College of Civil Engineering and Architecture,Central South University,Changsha 410075,China;3.China Railway No.4 Engineering Group Co.,Ltd.,Hefei 230023,China)  
Collapses are common tunnel accidents.Causes of some tunnel collapse examples are statistically analyzed and the important ones of them are mechanically explained.Collapse risk of the weathered trough section of Liuyang River Tunnel is evaluated afterwards by case-based reasoning.It is shown that the main inducing factors of tunnel collapses are weak rock and rainfall,for weak rock has very poor mechanical properties and would weaken rock mechanics and reduce the effective stress in surrounding rock.Collapse risk of Liuyang River Tunnel is likely to occur.It is suggested that more attention should be paid to monitoring information feedback and geological prediction.
【Fund】: 湖南省研究生创新基金项目(3340-74236000004);; 中铁四局科技研究开发计划课题(2006-19)
【CateGory Index】: U458
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