考虑参数空间变异性的电力工程边坡稳定性分析

Stability analysis of the slopes of power projects considering spatial variability of shear strength parameters

目前,在进行山区电力工程边坡安全稳定性分析时,忽略了岩土体抗剪强度参数的空间变异性影响,很可能导致重大工程隐患。因此,结合工程实例,利用随机场理论开展抗剪强度参数空间变异性对山区电力工程边坡稳定性影响分析。工程实例计算结果表明,岩土体抗剪参数空间变异性对边坡稳定性分析存在影响,单一的安全系数不足以评价边坡的稳定性,实际工程中应充分考虑边坡稳定性可靠度分析结果,采取相应的安全防护措施,确保边坡的稳定。

Currently,the deterministic method of obtaining a constant safety factor is used to evaluate the stability of slopes.However,the uncertainty of soil parameters is not considered in the solving process,which is not reasonable.In order to analyze the influence of the spatial variability of shear strength parameters on the slope stability,the random field discretization is developed,and non-intrusive stochastic method for slope reliability is used.The results of a practical project indicate that spatial heterogeneity of shear strength parameters significantly influences the slope stability.Hence,a single safety factor cannot completely determine the stability of slopes.The reliability analysis results of the slope stability should be taken into consideration and the corresponding safety protection measures should be taken to ensure the stability of abandoned dreg sites.