软层地质结构对崩滑堆积体稳定性影响分析——以凉水井崩滑体为例

Analysis of the Influence of the Geological Structure of Soft Layer on the Stability of Landslide Deposit——an Example of Liangshuijing Slumping-Accumulation Body

以三峡库区凉水井崩滑堆积体为例,通过其勘察资料和地质结构特征设计不同的地质结构模型(软层分布、软层连通率),运用ABAQUS有限元软件进行稳定性敏感性数值分析。研究结果表明:软层对于崩滑堆积体的变形具有控制作用,堆积物易沿着软层产生滑移,硬性结构面中的软层连通率决定软层滑移破坏的规模;没有软层结构的崩滑体中,滑动面易出现在堆积物和基岩接触面上。分析了软层地质结构对崩滑堆积体稳定性影响,提出了软层分布和软层连通率这两个关键要素,从地质结构的角度,为崩滑体的稳定分析提供了新的依据,对类似崩滑堆积体的稳定性预测具有一定的参考价值。

The slumping-accumulation of the Three Gorges Reservoir area is taken as an example,and different geological structure models(soft layer distribution and soft layer connectivity)are designed through the investigation data and geological structure characteristics.The stability sensitivity numerical analysis is carried out by using the ABAQUS finite element software.The results show that:soft layer deformation for lcgm has control function,easy accumulation along the soft layer slip,soft layer of hard structural plane in the connectivity rate decision soft layer sliding scale;No landslide soft layer structure,the sliding surface is easy to appear in the deposits and bedrock contact surface on.This paper analyses the influence of the geological structure of soft layer on the stability of slumping-accumulation body puts forward two key elements of soft layer distribution and the connectivity rate of the soft layer,which provides a new basis for the stability analysis of the slumping-accumulation from the angle of the geological structure,and has a certain reference value for the stability prediction of the similar slumping-accumulation.