滑坡运动过程模拟分析

Simulation of landslide process

为实现滑坡运动过程的数值模拟,应用滑坡运动模型方程和PIC(Particle In Cell)数值离散方法,对在液化情况下的典型连续大变形美国卡拉韦拉斯大坝滑坡算例进行了数值计算模拟分析,模拟出滑坡破坏后的运动过程。结果表明,滑坡前缘前100 s内平均速度为0.28 m/s,滑坡整体变形主要以慢速蠕动为主,显示了较低的流动性。模拟结果与实际情况吻合良好,验证方法的稳定性和有效性。通过对滑坡运动过程模拟可以得到滑坡的运动发展过程、滑坡的致灾范围和堆积形态等,从而为滑坡防治提供科学的参考和依据。

In order to realize the simulation of landslide process, the landslide model theory and PIC （ Particle in Cell） discretization method were used to simulate the whole motion process of the land- slides near Calaveras Dam. The calculation results agree well with the actual situation, which veri- fies the effectiveness of the model theory and the numerical solution. The simulation result shows that the average speed of the front of the landslide is 0. 28 m/s in the first 100 seconds and creep is the main deformation, a characteristic of low mobility. The motion process, the disaster area and the accumulation form of landslide can be obtained from the simulation of landslide process, which can provide a scientific reference and basis for landslide disaster prevention.