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Effect of Surrounding Rock’s Reinforcement on Seismic Performance of Tianjin Metro Shield Tunnel
Pages: 25-30
Year: Issue:  1
Journal: Journal of Tianjin Institute of Urban Construction

Keyword:  metro tunnelsurrounding rock reinforcementthickness of reinforcementelastic modulusseismic effect;
Abstract: This article takes the tunnel lining and surrounding soil of Tianjin Metro Line NO. 3 as research object and uses ANSYS to establish a three-dimensional finite element model accordingly. And then it mainly talks about the seismic constructions of underground structure and analyses the seismic effect of surrounding rock reinforcement method. The study indicates that effects of reinforcement measures of surrounding rock on seismic are remarkable. Under certain elastic modulus,the thicker the reinforced layers are made,the smaller the stress and deformation of the structure are formed. And when the thickness of reinforced surrounding rock is determined,the increasing elastic modulus can reduce the bending moment and shear of the lining structure.
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