考虑中间主应力影响水底隧道围岩与衬砌流固耦合弹塑性解

裂隙岩体在渗流水荷载作用下的裂隙围岩流-固耦合研究是隧道工程研究的热点问题，而计及中间主应力影响的隧道围岩流-固耦合应力计算鲜见介绍。采用双剪统一强度理论屈服模型，计及中间主应力影响，分析了在渗流水荷载作用下隧道围岩处于弹性、软化、塑性流动时的流-固耦合问题，并给出了含水围岩、衬砌应力、位移与变形区界面半径解析计算式。其结果对水底隧道围岩稳定分析与衬砌结构设计计算具有工程实用意义。

Elastoplastic calculation of adjoining rock and lining for undersea tunnel considering effect of intermediate principal stress

The research on fluid and stress coupling of fissured rock mass under seepage water has become a hot issure; but the calculation of rock considering intermediate principal stress is very few. By use of the unified strength theory and considering the intermediate principal stress, the tunnel surrounding rock to be placed in elasticity, soften, plasticity flow coupling, and give analytical solutiong of boundary radius in deformed district under the contain water to round a rock, lining stress and displacement. The acquisition result tunnel adjoining rock stability analysis and stress structure design's calculation to have the engineering practical meaning to the bottom of water tunnel.