防灾减灾工程学报2016，Vol.36Issue(4)：572-579,8.DOI:10.13409/j.cnki.jdpme.2016.04.010
考虑参数空间变异性的非均质边坡可靠度分析
Reliability Analysis of Heterogeneous Slopes Considering Spatially Variable Soil Properties
摘要
Abstract
The critical slip surface with the minimum factor of safety (FSmin) of a heterogeneous slope varies spatially when the spatial variability of soil properties is considered,which may induce numerous potential failure mechanisms existing in the slope.To effectively solve the slope reliability problems involving numerous potential failure mechanisms,a multiple stochastic response method (MSRSM) is proposed for reliability analysis of heterogeneous slopes.The reliability of a heterogeneous slope with a horizontal weak layer is investigated to demonstrate the effectiveness of the proposed approach.The effects of the horizontal weak layer and its uncertainty of location distribution on the slope reliability are addressed.The capacity of the traditional single response surface method in reliability analysis of heterogeneous slopes with spatially variable soil properties is also explored.The results indicate that the proposed approach can effectively evaluate the reliability of heterogeneous slopes in spatially variable soils.In contrast,it leads to an overestimation of the failure probabilities and relatively conservative slope designs using the single response surface method.Additionally,the horizontal weak layer has a significant influence on the slope stability,weakest failure path and slope reliability,while the effect of the uncertainty of location distribution is slight on the slope reliability.关键词
非均质边坡/可靠度/软弱夹层/空间变异性/随机响应面法Key words
heterogeneous slope/reliability/weak layer/spatial variability/stochastic response surface method分类
建筑与水利引用本文复制引用
蒋水华,姚池,杨建华,秦根泉..考虑参数空间变异性的非均质边坡可靠度分析[J].防灾减灾工程学报,2016,36(4):572-579,8.基金项目
国家自然科学基金项目(51509125)、江西省教育厅科学技术研究项目(GJJ150033)、江西省水利厅科技项目(KT201533)资助 （51509125）
