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research on the stability analysis and design of soil tunnel surrounding rock
Pages: 57-70,97
Year: Issue:  3
Journal: Engineering Sciences

Keyword:  GetLinkList(KeywordFilter('stability of tunnel surrounding rock strength reduction FEM safety factor of shear safety factor of tension failure design method of tunnel')'kw''CJFQ');
Abstract: The paper first analyzes the failure mechanism and mode of tunnel according to model experiments and mechanical calculation and then discusses the deficiency of taking the limit value of displacement around the tunnel and the size of the plastic zone of surrounding rock as the criterion of stability. So the writers put forward the idea that the safety factor of surrounding rock calculated through strength reduction FEM(finit element method) should be regarded as the criterion of stability,which has strict mechanical basis and unified standard and would not be influenced by other factors. The paper also studies the safety factors of tunnel surrounding rock (safety factors of shear and tension failure) and lining and some methods of designing and calculating tunnels. At last,the writers take the loess tunnel for instance and show the design and calculation results of two-lane railway tunnel.
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