论文部分内容阅读
采用室内三轴试验方法,基于塑性力学理论,获得泥岩峰后软化模量与围压的关系,构建了考虑围压影响的泥岩峰后应变软化模型,基于FLAC~(3D)平台进行开发,结合工程实例对模型进行验证.研究表明:构建的泥岩峰后应变软化模型可以考虑剪胀角的影响,符合围岩峰后变形的实际情况;数学模型能够较真实的反应岩石峰后非线性力学行为,为实现数值计算由定性向定量的转变奠定基础;通过现场实际应用表明,数值计算结果与现场实际情况吻合.
Based on the theory of plastic mechanics, the relationship between post-mudstone softening modulus and confining pressure was obtained by indoor three-axis test. The post-strain softening model of mudstone peak considering confining pressure was established. Based on the FLAC 3D platform, The engineering example is used to verify the model.The research shows that the post-peak strain softening model of mudstone peak can consider the influence of dilatancy angle, which is in line with the actual situation of post-peak deformation of surrounding rock. The mathematical model can more accurately reflect the post-peak nonlinear mechanical behavior , Which lays the foundation for the numerical calculation to change from qualitative to quantitative. The field practical application shows that the numerical results are consistent with the actual situation in the field.