长江科学院院报Issue(10)：57-64,8.DOI:10.11988/ckyyb.20150165
考虑参数空间变异的高风化岩质边坡可靠性分析
Reliability Analysis of Influence of Spatial Variability of Parameters on Highly-weathered Rock Slope
代庆礼1
作者信息
- 1. 青海有色地质工程勘察院，西宁 810012
- 折叠
摘要
Abstract
In this paper,a numerical analysis procedure which integrates the first-order reliability method (FORM) and the modified Latin hypercube sampling technique (LHIS)is adopted in the probabilistic stability analysis to ex-plore the inherent variability of parameters of a highly weathered rock slope in practical engineering.Effects of spa-tial variability of parameters on the slope stability are taken into consideration.The LHIS technique is employed to calculate the probability distribution of safety factor,and meanwhile the FORMis used to determine the critical fail-ure surface and conduct preliminary sensitivity analysis,then the influence of model input parameters on slope sta-bility is obtained.Moreover,Spencer’s limit equilibrium method is employed to calculate the value of Fs of the in-stability failure surface and to evaluate the function G(X)and then to calculate the reliability index.Results reveal that the characteristics of highly weathered rock slope can be more truly reflected by considering the spatial variabil-ity of parameters rather than traditional single parameters;the number of simulation is apparently reduced and the efficiency is improved by using LHIS rather than using traditional sampling method;the reliability theory and proba-bilistic stability analysis method are more suitable to analyze the effect of parameter’s spatial variability on the safe-ty of highly weathered slope than traditional limit balance method.关键词
高风化岩质边坡/FORM/LHIS/概率稳定性分析方法/安全性评价Key words
highly weathered rock slope/FORM/LHIS/probabilistic stability analysis method/safety evaluation分类
天文与地球科学引用本文复制引用
代庆礼..考虑参数空间变异的高风化岩质边坡可靠性分析[J].长江科学院院报,2015,(10):57-64,8.
