四川雅安峡口滑坡物理模型试验研究

A model test study of the Xiakou landslide of Ya'an in Sichuan

在调研四川雅安峡口滑坡的地形地貌、物质组成、岩层特征等基础上,根据相似理论,通过物理模型试验,模拟该滑坡在降雨条件下的变形和破坏特征,探讨滑坡的发生机理和破坏发展过程及演化趋势。模型试验结果表明:在降雨条件作用下,孔隙水压力、土压力和位移呈现一定的变化规律;试验得出了峡口滑坡的破坏方式、运动特性、破坏位置及可能出现的次级灾害及其位置。

On the basis of survey of topography,composition,and rock characteristics of the Xiakou landslide in the north of Ya＇an in Sichuan,deformation and failure characteristics of the landslide under the condition of the rain is simulated through the physical model test. The occurrence mechanism of landslide and failure process of development and evolution trend are discussed. The model tests indicate that under the rainfall condition,pore water pressure,earth pressure and displacement show certain variation. The results of movement characteristics,damage location and the possible secondary disasters and their locations of the Xiakou landslide are obtained.