长江科学院院报2017，Vol.34Issue(10)：107-113,7.DOI:10.11988/ckyyb.20160619
土质边坡归一化变形量失稳判据研究
Normalized Failure Criterion for Soil Slope Stability
摘要
Abstract
In the aim of obtaining the relationship between microcosmic mechanism of soil slope instability and macroscopic displacement,a method of slope stability evaluation is proposed.The internal correlation between the soil element stress and the whole stability in the process of soil slope sliding was analyzed through shear strength reduction finite element method,and the stress difference of soil unit on the potential sliding surface during progressive failure of slope was defined.In subsequence,the consistency and uniformity among different criteria,including plastic zone penetration,abrupt change of characteristic displacement,and stress difference,were verified through instability evaluation.Furthermore,the influences of geometric and physical parameters on the horizontal displacement of slope top in limit state were analyzed through single-factor sensitivity analysis method.These parameters include slope height,slope ratio,elastic modulus,density,cohesion,internal friction angle,and Poisson ratio.Finally,the normalized failure criterion for soil slope based on deformation in consideration of both geometric and physical factors was established through the method of coefficient of variation.关键词
土质边坡/归一化变形量/失稳判据/强度折减有限元法/整体稳定性Key words
soil slope/normalized variables/failure criterion/shear strength reduction FEM/global stability分类
建筑与水利引用本文复制引用
张坤勇,杜伟,李广山,钟思成,刘子剑..土质边坡归一化变形量失稳判据研究[J].长江科学院院报,2017,34(10):107-113,7.基金项目
国家自然科学基金项目(41530637,51578214) （41530637,51578214）
中央高校基本科研业务费专项资金项目(2015B17714) （2015B17714）
中国交通建设股份有限公司科技研发项目(2012-ZJKJ-11) （2012-ZJKJ-11）
