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以定汉高速高桥滑坡工程为依托,首先采用双轴压缩模拟实验与宏观力学参数值对比标定的方法确定出滑坡各岩土层的细观参数,经过验证该组参数可用于后续的滑坡稳定性分析。进而建立了滑坡的离散元模型,研究滑坡的稳定状态,并预测其滑动过程和破坏模式。结果表明:滑坡中的粉质黏土层向下滑动,并在坡脚堆积。强风化花岗岩和中风化花岗岩未发生滑动,滑动面为粉质黏土层与花岗岩的交界面。离散元模拟结果与极限平衡法分析的结果有较好的一致性,该模拟结果对该工程的设计、施工具有指导意义。
Based on the Dinghan high-speed Takahashi landslide project, the mesoscopic parameters of landslides are determined by the method of biaxial compression simulation and macroscopic mechanical parameter comparison. After verification, the parameters of this group can be used for subsequent landslide stability Sexual analysis. Then a discrete element model of landslide is established to study the stability of the landslide and to predict its sliding process and failure mode. The results show that the silty clay layer in the landslide slides downward and piles up at the foot of the slope. Strong weathered granite and granitic weathering did not slip, slip surface of silty clay and granite at the interface. The results of discrete element simulation and limit equilibrium analysis are in good agreement. The simulation results have guiding significance for the design and construction of this project.