【摘要】 对含有结构面的岩体,基于统一强度理论,在考虑洛德参数的基础上,推导出可以考虑不同受力状态下随洛徳参数和中间主剪应力系数b变化的材料统一强度参数Ct、φt,建立了含断裂面岩体的强度公式,即考虑中间主应力的岩体破坏公式,并分析了其有效范围。通过硅藻质软岩的普通三轴试验结果验证了所建立公式的正确性,并根据岩土材料统一强度参数确定的方法,分析了含有不连续面岩体强度以及统一强度参数随洛德参数的变化,以及中间主剪应力系数b值对强度参数的影响,结果表明:统一强度参数随洛徳参数的增大而增大一定值后随洛徳参数的增大而减小；随中间主应力系数的增大而增大。更多还原

【Abstract】 Considering rock mass with discontinuous plane,based on unified strength theory,and introducing Lode parameter,unified strength parameters of materials are introduced,which are functions of Lode parameter and the intermediate principal shear stress parameter b.The strength criterion of rock mass with discontinuous plane,i.e.,failure criterion of considering the intermediate principal stress,is proposed,and the effective range of criterion is analyzed.The proposed criterion is verified by conventional triaxial experiment of diatomaceous soft rock.The changes of strength and unified strength parameters of rock mass with Lode parameter and parameter b are analyzed.Results show that unified strength parameters increase a certain value with increasing lode parameter,and then decrease with increasing lode parameter;and increase with increasing parameter b.更多还原