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用数值方法对岩质高边坡进行稳定性分析时,描述岩体结构对的精细程度会影响分析结果,但常见的有限单元法程序仍难以对复杂节理岩体进行精细建模。为解决这一问题,将结构面网络模拟与离散单元法相结合,在UDEC软件中,利用FISH语言编写网络模拟程序,依据结构面统计资料和结构面分级,实现对复杂岩体结构的精细描述。以某大型水电工程边坡为例,在对岩体结构进行精细描述的基础上,采用离散元强度折减法对边坡进行稳定性分析。通过与极限平衡法和一般离散元结果的对比,表明基于复杂岩体结构精细描述确定的边坡潜在滑动面和安全系数是合理的,为复杂岩质边坡破坏模式和稳定性的分析提供了新的途径。
When using numerical methods to analyze the stability of rocky high slopes, it is difficult to describe the complicated structure of rock mass with the finite element method. In order to solve this problem, we combine the network simulation of structural plane and the discrete element method. In UDEC software, we use FISH language to write the network simulation program. According to the statistical data of surface structure and the classification of structure plane, the detailed description of complex rock mass structure can be realized. Taking the slope of a large hydropower project as an example, based on the detailed description of the rock mass structure, the stability analysis of the slope is carried out by the discrete element strength reduction method. The comparison with the limit equilibrium method and the general discrete element method shows that it is reasonable to describe the potential slip surface and safety factor of the slope based on the detailed description of the complex rock mass structure, and provide the analysis for the failure mode and stability of the complex rock slope New way.