水利水电科技进展Issue(6)：27-30,4.DOI:10.3880/j.issn.10067647.2014.06.006
考虑中间主应力的非饱和土边坡安全系数新解
New safety factor of slopes in unsaturated soils by considering the intermediate principal stress effect
摘要
Abstract
Based on the unified solution of shear strength for unsaturated soils in the plane strain condition, this study analyzed the influence of both unsaturated characteristics and intermediate principal stress to soil strength. Additionally, we derived a new serialized safety factor of slopes about unsaturated soils based on the Swedish simple slice method. The effects of intermediate principal stress and matric suction were investigated and discussed. The results showed that the influence of intermediate principal stress and matric suction to safety factor of slopes in unsaturated soils is significant, and safety factor increases obviously with increase of the intermediate principal stress effect and matric suction. The results also revealed that the effect of strength theory on slope stability is remarkable. Consequently, attentions should be given to choose a rational failure criterion and strengthen the monitoring and stability control of matric suction. These results obtained in this study could provide theoretical guidance for optimized design and construction for slope support.关键词
非饱和土/边坡/安全系数/中间主应力/基质吸力Key words
unsaturated soils/slope/safety factor/intermediate principal stress/matric suction分类
建筑与水利引用本文复制引用
张常光,李艳,朱倩..考虑中间主应力的非饱和土边坡安全系数新解[J].水利水电科技进展,2014,(6):27-30,4.基金项目
国家自然科学基金(41202191) （41202191）
陕西省自然科学基础研究计划(2014JQ7290) （2014JQ7290）
长安大学中央高校基本科研业务费专项(2014G1281072) （2014G1281072）
