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《Highway Engineering》 2019-02
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Simplified Method for Calculating the Active Earth Pressure on Retaining Walls of Narrow Backfill Width Based on DEM Analysis

LIU Dong;YANG Minghui;ZHAO Minghua;College of Civil Engineering,Hunan University;  
Spaces for backfills are often constrained and narrow when retaining walls must be built close to existing stable walls in urban areas or near rock faces in mountainous areas,and the active destruction mode is quite different from the classical model of soil mechanics. The discrete element method( DEM),using Particle Flow Code( PFC2 D) software,was employed to simulate the behavior of cohesiveless soil with narrow width behind a rigid retaining wall when the wall translation-move away from the soils. The results show that,at this time,the slip surface of the backfill cannot penetrate the entire fill. It is a local linear rupture surface through the wall stump,that is,a trapezoidal cross section consisting of an upper rectangular part and a lower triangular part., friction angle related to the body. Then,based on the limit equilibrium method with the obtained slip surfaces in PFC2 D,a simplified analytical method is presented to obtain a solution for the active earth pressure acting on rigid retaining with narrow backfill width. The calculated values compare reasonably well with those from physical tests in previous literature.
【Fund】: 国家自然科学基金(51278184 51678230);; 教育部新世纪优秀人才支持计划(NCET-13-194);; 湖南省交通科技计划项目(201421)
【CateGory Index】: TU432
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【Citations】
Chinese Journal Full-text Database 3 Hits
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1 JIANG Ming-jing;HE Jie;State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University;Key Laboratory of Geotechnical and Underground Engineering of Ministry of Education, Tongji University;Department of Geotechnical Engineering, College of Civil Engineering, Tongji University;;A distinct element analysis of critical state passive earth pressure against a rigid wall using a rolling resistance contact model[J];岩土力学;2015-10
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