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实际工程中的岩体总是处于三向应力状态下,研究三向应力状态下岩体强度和变形特性,对于岩土工程的设计施工具有重要意义。此次研究以某水电站工程项目为依托,对水电站左右坝肩的蚀变岩做了大量的常规三轴压缩试验。在此基础上,经过分析处理,得出了蚀变岩的抗剪强度指标与围压的相关关系,建立了应力-应变关系曲线的分阶段本构模型。在蚀变岩的力学特性研究方面进行了有益的探索,为工程设计和稳定性分析提供了重要的技术支撑。
The rock mass in the actual project is always in the state of three-direction stress. It is of great significance to study the strength and deformation characteristics of the rock mass in three-direction stress state. Based on a hydropower station project, this study has done a lot of conventional triaxial compression tests on the altered rock at the dam abutments on the left and right sides of the hydropower station. On this basis, through the analysis and processing, the correlation between shear strength index and confining pressure of altered rock is obtained, and a staged constitutive model of stress-strain curve is established. In the alteration rock mechanical properties of the research conducted a useful exploration, engineering design and stability analysis provides an important technical support.