岩土工程学报2024，Vol.46Issue(7)：1418-1426,9.DOI:10.11779/CJGE20230596
土坡张拉缝滑面稳定性评价的若干基本问题
Several basic problems in stability evaluation of sliding surface of soil slopes with tension cracks
摘要
Abstract
Focusing on some basic problems in stability evaluation of the sliding surface with tension cracks,the feasibility and adaptability of the two kinds of confusing"ignoring"methods are analyzed through over a thousand examples,and their effects on the stability of sliding surfaces with tension cracks are also investigated under different depths of tension cracks,different geometric shapes of sliding surfaces(arc,polyline,combination),different methods of safety factor.The main conclusions are drawn as follows:(1)When the tension cracks are not filled with water,the first kind of method is only applicable to the simplified Janbu and Bishop methods,but not to GLE and unbalanced thrust methods.Also,the first kind of method does not work when the water pressure is applied,only the second kind of method works.(2)The curve of the safety factor with tension cracks is related to whether the inter-slice force before cracks happen is tension or pressure,which is also related to the soil cohesion,depth of the tension cracks and methods of safety factor.If the cohesion is low,the inter-slice force is more likely to be pressure,and if the cohesion is high,the inter-slice force is more likely to be tension.(3)It's conducive to the convergence of the iterative solution by setting tension cracks in analysis,especially for the strict methods,such as GLE.The research results may provide a solid theoretical and feasible analysis method for scientifically evaluating the stability of the sliding surfaces with tension cracks.关键词
张拉缝/边坡/安全系数/稳定性/深度线Key words
tension crack/slope/factor of safety/stability/depth line分类
建筑与水利引用本文复制引用
刘学军,宋飞,张鲁渝,侯宪明,哈月龙..土坡张拉缝滑面稳定性评价的若干基本问题[J].岩土工程学报,2024,46(7):1418-1426,9.基金项目
国家自然科学基金项目(52278328) （52278328）
中建新疆建工科技研发课题(65000022859700210197) （65000022859700210197）
