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滑坡类型、规模、滑动面的位置及其影响距离等滑坡特性的有效预测,将有助于规划合适的减灾工作以减少滑坡灾害所带来的损失。利用强度折减有限元法与非饱和非稳定渗流有限元分析相结合的流固准耦合方法对滑坡模型试验进行了数值分析,结果表明:该法在描述降雨条件下边坡变形至失稳过程等方面具有明显的优势,即可用以预测滑坡的类型与规模以及潜在滑动面的位置,并可对滑坡的影响距离进行合理的定性分析与描述,因此,该法对滑坡减灾工作具有实用价值。
The effective prediction of landslide characteristics, such as the type and size of the landslide, the location of the sliding surface and its impact distance, will help to plan appropriate disaster reduction work to reduce the losses caused by landslide hazards. The numerical simulation of landslide model test is carried out by means of fluid-solid-solid coupling method combining finite element method of strength reduction and unsaturated finite element analysis of unsteady flow. The results show that this method can describe the deformation and instability of slope under rainfall This method has the obvious advantage that it can predict the type and scale of landslide and the position of potential sliding surface, and can make reasonable qualitative analysis and description of landslide influence distance. Therefore, this method has practical value for landslide disaster reduction.