Evaluation of soil arching effect due to partially mobilized shear stress in piled and geosynthetic-reinforced embankment

作     者：LV Wei-hua WU Tao GU Fan GAO Lei 吕伟华;武涛;顾凡;高磊

作者机构：School of Civil EngineeringNanjing Forestry UniversityNanjing 210037China Key Laboratory of Ministry of Education for Geomechanics and Embankment EngineeringHohai UniversityNanjing 210098China National Engineering Laboratory of Highway Maintenance TechnologyChangsha University of Science&TechnologyChangsha 410114China National Center for Asphalt TechnologyAuburn UniversityAlabama 36830USA 

基　　金：Project(51508279) supported by the National Natural Science Foundation of China Project(KFJ170104) supported by the Open Fund of National Engineering Laboratory of Highway Maintenance Technology of Changsha University of Science & Technology, China Project(BK20150885) supported by the Jiangsu Provincial Natural Science Fund, China Project(2019003) supported by the Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering of Hohai University, China 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2020年第27卷第7期

页      码：2094-2112页

摘      要：In piled and geosynthetic-reinforced(PGR) embankment, the arching behavior determines the overburden load on piles and subsoils. Placement of geosynthetic is effective in reducing the relative displacement between pile and subsoil. When the mobilized shear stress is less than the shear strength, partially developed arching will occur. Consequently, existing analytical methods, adopting the ultimate shear strength failure criterion, need to be improved. This study developed a simplified 2 D analytical method, which is based on the developing arching effect, to evaluate the load redistribution of the PGR embankment. Then, the influences of embankment height and internal friction angle, subsoil depth, ratio of pile cap width to pile clear spacing(RPC) and geosynthetic tensile stiffness on the critical height ratio, stress concentration ratio, soil arching ratio, geosynthetic tension and axial strain were investigated. This study suggests that a RPC of 1:1.0 and a one-way of single-layer geosynthetic tensile stiffness of 2000 kN/m should be considered as the sensitivity thresholds for the PGR embankment.

主 题 词：pile geosynthetic arching effect mobilized shear stress parametric analysis 

学科分类：081401[081401] 08[工学] 0814[工学-地质类] 

核心收录：

D　O　I：10.1007/s11771-020-4433-8

馆 藏 号：203957751...