三峡库区黄土坡滑坡滑带工程地质特征研究

在宏观分析滑坡地质特征的基础上，结合室内及现场试验对黄土坡滑坡Ⅰ号临江崩滑堆积体滑带土岩性、颗粒成分、矿物成分、微观结构、物理力学特征与崩滑体在水库回水条件下的变形进行分析研究。结果表明，滑带土中黏粒及粉粒含量较高，有明显的深层蠕变磨光面和擦痕，且含有亲水的黏土矿物成分和呈片状结构特征是滑带土在回水作用下易饱水软化的重要条件；滑带土饱水后力学强度降低是导致崩滑体蠕动变形的重要原因。

Research on engineering geology characteristics of soil in sliding zone of Huangtupo landslide in Three Gorges Reservoir area

Based on a macroscopic analysis of geological characteristics of landslides and indoor experiments, the lithology, grain ingredients, mineral components, microstructure, physico-mechanical behaviors and deformation under the reservoir backwater condition of soil in sliding zone in No.Ⅰ riverside landslide soil of Huangtupo landslide are analyzed. The results show that the indispensable conditions for the soil in sliding zone to be easily water-saturated and softened include a high content of clay or powder, rather obvious polished surfaces and scratches under the influence of deep creeps and hydrophilic clay minerals and soil with a sheet structure; the creep deformation of slumped mass is a vital consequence of mechanical strength decrease of soil in sliding zone being water-saturated.