分析中的应用
(1. 西安交通大学 土木系， 西安 710049)
摘 要: 应用统一强度理论对岩石在三轴压缩载荷下的强度特性进行了理论分析，并将分析结果与已有实验结果作了对比。研究表明，统一强度理论能较全面地反映岩石的各种强度特征。另外，还应用统一强度理论对静水压力条件下的圆形巷道围岩进行了弹塑性分析，分析表明，与Mohr-Coulomb强度理论结果相比，巷道轴向应力和强度理论中的参数b对巷道围岩塑性区半径、应力分布及径向位移等均有影响。
关键字: 统一强度理论；岩石强度；巷道围岩；弹塑性分析
its application in
elasto-plastic analysis to tunnel
（1. Department of Civil Engineering,
Xi′an Jiaotong University,Xi′an 710049, China）
Abstract:The characteristics of rock strength under triaxial compressive stress is analyzed by the unified strength theory. The results show that the unified strength theory can deliberate many aspects of the rock strength. In addition, the elasto-plastic analysis using the unified strength theory is also devoted to the wall rock of tunnel with circular cross-section under static hydraulic pressure . The results show that the axial stress parallel to the tunnel and the parameter b in unified strength theory have significant effects on the radius of plastic zone, the magnitude of stresses and the displacement of the wall rock of tunnel, comparing with theory of Mohr-Coulomb .
Key words: unified strength theory; strength of the rock; wall rock of the tunnel; elasto-plastic analysis
