岩土力学2013，Vol.34Issue(6)：1791-1798,8.
摩擦型岩土材料土拱效应微观机制颗粒流模拟分析
Analysis of microcosmic mechanism of soil arching in frictional geotechnical material by particle flow simulating
摘要
Abstract
By simulating the “trapdoor" test of Terzaghi using discrete element program,the characteristics of displacement of particles and load transfer are studied from granular and microcosmic viewpoint when soil arching existing in frictional geotechnical material; moreover,the influences of particle diameter,porosity,particle frictional coefficient,width of trapdoor and trapdoor displacement on soil arching are also studied.The results indicate that due to the effect of soil arching,the vertical loading above soil arching is transformed to horizontal loading within a certain range above the arch foot; then the horizontal loading will transfer to both sides of soil,which leads to horizontal displacement of soil.When the trapdoor moves downward,the effect of soil arching evolves continuously; and enlarging the particle diameter and frictional coefficient,decreasing porosity and trapdoor width will not only enhance the effect of soil arching but also narrow the influence range of soil arching.关键词
土拱效应/摩擦型岩土材料/微观机制/离散元Key words
soil arching / frictional geotechnical material / microcosmic mechanism / discrete elements分类
建筑与水利引用本文复制引用
韩高孝,宫全美,周顺华..摩擦型岩土材料土拱效应微观机制颗粒流模拟分析[J].岩土力学,2013,34(6):1791-1798,8.基金项目
铁道部重点课题(No.2010G003-A). （No.2010G003-A）
