考虑中间主应力影响的压力隧洞围岩抗力系数通用计算式

Calculation of resistance coefficient of adjoining rock for pressure tunnels considering effect of intermediate principal stress

摘要: 采用双剪统一强度理论,考虑中间主应力影响,建立了压力隧洞围岩抗力系数K的计算方法,给出了其相应解析计算式,并退化到莫尔–库仑屈服模型、特雷斯卡屈服模型,验证了所获成果的正确性与通用性。

Abstract: By use of the unified strength theory,a method to calculate the resistance coefficient K of adjoining rock for pressure tumels was established considering effect of intermediate principal stress.The corresponding equations were given.They were degenerated to the Mohr-Coulomb yield model and Tresca yield model.The accuracy of test results were verified.