多断层褶皱叠合区碎石土陡坡的边坡稳定性评价分析

EVALUATION AND ANALYSIS OF SLOPE STABILITY OF GRAVEL SOIL STEEP SLOPE IN MULTI-FAULT FOLD OVERLAPPING AREA

本研究通过对云贵高原某多断层褶皱叠合区碎石土陡坡破裂带的勘察和土工试验,获得了滑坡区碎石土、滑面和基岩的主要岩土力学参数。采用反算法检验滑坡抗剪强度指标,明确了其滑坡形状特征、变形破坏模式和滑坡体形成机制。最后,通过计算不同特征滑面对应的特征稳定系数和特征剩余推力,分析评价滑坡稳定性和危险性并给出施工建议。

In this paper,based on the investigation and geotechnical test of the fracture zone of steep slope of gravel soil in a multi-fault fold superposition area of Yunnan-Guizhou Plateau,the main geotechnical parameters of gravel soil,sliding surface and bedrock in the landslide area are obtained.The inverse algorithm is used to test the shear strength index of landslide,and the landslide shape characteristics,deformation and failure mode and the formation mechanism of landslide are defined.Finally,by calculating the characteristic stability coefficient and characteristic residual thrust of different characteristic sliding faces,the stability and risk of landslide are analyzed and evaluated,and the construction suggestions are given.