中文摘要：

为准确分析评价西宁市泥岩滑坡稳定性,确定其失稳破坏及其模式,通过查阅西宁详细勘察报告并现场地质调研与勘察,以张家湾砖厂滑坡工程为例,建立地质模型。基于FLAC3D强度折减法及SLIDE极限平衡法对比分析,论证其破坏失稳模式。结果表明：张家湾砖厂滑坡总体的稳定性系数为1.290,整体处于稳定状态,滑体不产生滑动,但局部（3个监测点）具有不同程度的失稳破坏;与初步判断3个监测点失稳破坏模式倾倒—崩落、平面滑动、崩滑破坏一致,其中倾倒—崩落破坏变形最为明显,位移最大,达到3.70 m。经过对比分析,充分验证滑坡体失稳破坏模式的准确性,为西宁地区泥岩滑坡失稳破坏模式提供了理论依据。

英文摘要：

In order to accurately analyze and evaluate the stability of mudstone landslide in Xining and determine failure and its mode, the geological model is established by reviewing the detailed survey report and site geological survey and investigation in Xining. Based on FLAC3D strength re-duction method and SLIDE limit equilibrium method, the failure analysis model is demonstrated.The results show that the overall stability coefficient of Zhangjiawan brick factory is 1.290. The site is in stable state and the sliding body does not produce sliding as a whole, but some local points （three monitoring points） have different degree of destabilization damage. The three monitoring points are in destabilization damage mode with tilting - collapse, plane sliding, landslide damage, which is consistent with preliminary judgment. The landslide and collapse are the most obvious, and the displacement is the largest, reaching 3 . 70 m. Through the comparative analysis, the accuracy of the failure mode of the landslide is verified, which provides the theoretical basis for the failure model of the mudstone landslide in Xining area.