长江科学院院报2017，Vol.34Issue(2)：56-62,7.DOI:10.11988/ckyyb.20161014
岩溶塌陷影响下加筋路基承载机理研究
Mechanisms of Load Transfer in Geosynthetic-reinforced Embankments Subjected to Localised Karst Collapse
摘要
Abstract
Geosynthetics could be used for reinforcing embankment subjected to the influence of potential localised karst collapse.In this paper,the displacements and stresses in both embankment and geosynthetics,and the bear-ing mechanism of geosynthetic-reinforced embankment are analyzed in detail based on the numerical simulation re-sults from PLAXIS3D software by using large deformation analysis method with updated mesh function.Moreover,the influences of design parameters (including size of karst collapse,embankment height,geosynthetic’s tensile stiff-ness and properties of embankment soil)on the maximum settlements of embankment and the maximum tensions of geosynthetics are investigated.Results indicate that the maximum settlement of embankment is depended on whether a closed stress dome in embankment is formed,and the height of the stress dome is mainly related to the size of col-lapse and the cohesion of embankment soil.Geosynthetic’s tensile stiffness,embankment height,and internal fric-tion angle of embankment fill have slight influence on the height of stress dome.The maximum longitudinal and transverse tensions of geosynthetics are related to the longitudinal and transverse stiffness of geosynthetics,and the differences of both maximum pavement settlement and strain in geosynthetics caused from uniaxial and biaxial geo-grids are small.关键词
岩溶塌陷/加筋路基/承载机理/数值分析/土拱效应Key words
localised karst collapse/geosynthetic-reinforced embankment/bearing mechanism/numerical analy-sis/soil arching effect分类
交通工程引用本文复制引用
万梁龙,陈福全,邹维列..岩溶塌陷影响下加筋路基承载机理研究[J].长江科学院院报,2017,34(2):56-62,7.基金项目
国家自然科学基金项目（41572253）；高等学校博士学科点专项科研基金博导类资助课题项目 （）
