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滑坡演化的本质是滑带土抗剪强度参数在多因素影响下随时间弱化的过程。使用试验法和工程地质类比法得到的滑带土抗剪强度都属于某一时间点,具有时间上的局限性。以滑坡实际监测的位移曲线及其趋势为依据,采用数值模拟手段对滑坡不同时间段的抗剪强度进行连续、继承反演分析,得到滑带土抗剪强度参数随时间有弱化的趋势。并以三峡库区白水河滑坡为例,运用GEO-studio数值模拟软件实现该反演过程,数值模拟结果与监测数据具有较好的一致性,表明通过参数反演得到的不同时间段的抗剪强度比较合理。
The essence of landslide evolution is the process of weakening of shear strength parameters of landslide with time under the influence of many factors. The shear strength of the sliding zone soil obtained by the test method and engineering geology analogy method belong to a certain point in time, which has the limitation of time. Based on the actual monitoring displacement curve and its trend of landslide, the shear strength of the landslide at different time periods is continuously and inversely analyzed by numerical simulation method, and the shear strength parameters of the sliding zone soil are weakened with time. Taking Bai Shuihe landslide in the Three Gorges Reservoir area as an example, the inversion process was implemented by using GEO-studio numerical simulation software. The numerical simulation results were in good agreement with the monitoring data, indicating that shear resistance of different time periods More reasonable intensity.