Effect of a less permeable stronger soil layer on the stability of non-homogeneous unsaturated slopes

作     者：Nabarun DEY Aniruddha SENGUPTA Nabarun DEY;Aniruddha SENGUPTA

作者机构：Department of Civil EngineeringIndian Institute of Technology KharagpurKharagpur 721302India 

出 版 物：《Frontiers of Structural and Civil Engineering》 (结构与土木工程前沿（英文版）)

年 卷 期：2020年第14卷第6期

页      面：1462-1475页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 08[工学] 0817[工学-化学工程与技术] 070303[理学-有机化学] 0703[理学-化学] 

基　　金：funded by the HYDRODRIL project sponsored by the European Commission(FP7-PEOPLE-2011-IRES-Proposal) 

主　　题：non-homogeneous slope stronger soil layer factor of safety centrifuge model test unsaturated soils 

摘      要：Slope failure occurs due to an increase in the saturation level and a subsequent decrease in matric suction in unsaturated *** paper presents the results of a series of centrifuge experiments and numerical analyses on a 55°inclined unsaturated sandy slope with less permeable,stronger silty sand layer inclusion within *** is observed that a less permeable,stronger silty sand layer in an otherwise homogeneous sandy soil slope hinders the infiltration of *** water content of the slope just above the stronger layer increases significantly,compared to *** shear band is found to initiate in a homogeneous sandy soil slope,whereas for a non-homogeneous slope,they initiate just above the less pervious,stronger layer.A discontinuity of the shear zone is also observed for the case of a non-homogeneous soil *** factor of safety of a non-homogeneous,unsaturated soil slope decreases because of the less permeable,stronger *** decreases significantly if this less permeable,stronger soil layer is located near the toe of the slope.