Deformation of Songping landslide is mainly creep-cracking at back and creeping in the front of landslide.Part of the slope is unstable.Therefore,analysis on the slope stability becomes very important.This article analyzed the formation mechanism of the landslide according to its structure and morphological character,and determined that the failure pattern of the landslide is creep-cracking.The stability was calculated by methods of geologic analysis and quantitative evaluation.The result is obtained that the stability is well in natural situation.But when it comes to natural storm,the landslide is instability.Finally,reasonable control suggestions are given based on the above analysis.

在对研究区工程地质条件研究的基础上,通过现场调查、对楞古栋滑坡区的工程地质条件、滑坡的边界条件和滑坡的坡体结构进行研究,结合滑坡稳定性的影响因素,根据楞古栋滑坡坡表滑坡堆积物的地形地貌、地质结构以及变形失稳破坏的模式等,选取纵剖面作为计算依据;以边坡稳定性计算时采用的强卸荷带内组合结构面以及基覆基面作为滑动面;塌滑范围依据平面地质图上的潜在滑移体的边界。考虑斜坡稳定性、坡体结构、失稳破坏的机制,结合工程实际情况,对岸坡进行失稳后的涌浪计算分析。

讨论了冲锥古崩塌体地面塌陷分布的特征,分析了占崩塌体的来源,认为塌陷是崩塌体架空结构与潜蚀综合作用的结果,在对崩积体水文地质条件进行讨论后,对塌陷坑的形成条件进行分析.最后提出了崩塌体用地的建议.