三峡库区某滑坡抗剪强度参数的反演分析

Reversion analysis of anti-shearing strength parameters of a landslide in TGP reservoir area

研究了三峡库区某滑坡的工程地质条件及滑坡体基本特征,分析了诱发坡体失稳的主要因素;应用边坡稳定性反演分析原理,对边坡滑移面的抗剪强度参数进行反演计算,并评价各参数的敏感性。分析结果显示:该滑坡体当前处于极限平衡状态;抗剪强度参数c和φ对边坡稳定性的影响均很显著,其中φ的显著性强于c。给出了抗剪强度指标的建议值:φ=10.0°,c=10.0kPa,提出了滑坡的工程治理措施。

Reversion analysis is important to ascertain the anti-shearing strength parameters of slip surface. Based on the study of engineering geology condition and the basic properties of landslide body of a landslide in TGP reservoir area, the main factor to induce slope failure is analyzed, the stability of landslide is evaluated. According to the principle of reversion analysis of slope stability, the anti-shearing strength parameters of slip surface is obtained by reversion calculation, and the susceptibility of strength parameters is studied. The research results indicate that the landslide is in a state of limit equilibrium, the stability of landslide is sensitive to anti-shearing strength parameters (including c, Φ) of slip surface. Additionally the susceptibility of Φ is higher than that of c. The advice values of anti-shearing strength parameters are obtained: Φ = 10. 0°,c = 10. 0 kPa. The engineering treatment methods of landslide are also presented.