堆积层滑坡滑动面搜寻及稳定性评价

Searching for Slip Surface and Stability Analysis of Colluvial Slope

堆积层滑坡坡体物质组成复杂、不均匀,结构杂乱,水库水位的变化,也将明显改变其岩土力学性质。该类滑坡在三峡库区乃至全世界都有广泛分布,为了提高其稳定性分析的精度,提出了优化技术结合地质勘察搜索最危险滑动面的方法。并结合三峡库区-岸坡工程实例,进行了多种工况条件下的稳定性分析,得到了各工况条件下的稳定安全系数。结果表明:该方法能较好地进行堆积层滑坡滑动面搜寻,为堆积层滑坡稳定性评价的可靠性提供保证。

Colluvial landslide deposit material is much different from homogeneous and continuous soil.And the properties of reservoir bank will be changed greatly with water level changing.Colluvial landslides distribute in the world widely,especialy in the Three Gorges Reservoir area.In order to make an accurate evaluation of the stability analysis,a geological exploration and optimization method is developed for searching for the critical slip surface.And the method is applied to a Three Gorges Reservoir bank slope stability analysis. The result showed the method could find out the critical slip surface exactly, then the stability of colluvial slope could be estimated correctly.