长江科学院院报2017，Vol.34Issue(2)：35-40,6.DOI:10.11988/ckyyb.20161005
高填方涵洞加筋减载的数值模拟
Numerical Simulation on Load Reduction by Reinforcement Bridge of Culvert Beneath High Filling
摘要
Abstract
In the aim of identifying the influencing factors and their effects on load reduction effect for culvert be-neath high fill,the method and mechanism of load reduction by reinforcement bridge are introduced firstly.On this basis,by means of numerical simulation,the influences of number of geogrid layer,width,height and lateral slope angle of load reduction ditches,as well as properties of filling material on the vertical earth pressure and the load reduction effect are investigated.Results suggest that the modulus of the filling material in the load reduction ditch and the height of the ditch have great effect on the load reduction.Ditches of larger height and lower material modu-lus lead to significantly better load reduction effect and less vertical earth pressures on the crown of culverts.The width of load reduction ditch,number of geogrid layer and internal friction angle of backfill material have little effect on the load reduction,but the increase of the width of the load reduction ditch results in more uniform inter-nal forces for the culvert and a decrease of bending moment.关键词
高填方涵洞/加筋减载/土压力/格栅/数值模拟Key words
culvert with high fill/load reduction by reinforcement/earth pressure/geogrid/numerical simulation分类
建筑与水利引用本文复制引用
马强,肖衡林,李丽华..高填方涵洞加筋减载的数值模拟[J].长江科学院院报,2017,34(2):35-40,6.基金项目
国家自然科学基金项目（51678223，51678224）；黄土地区公路建设与养护技术交通行业重点实验室开放课题（KLTLR－Y12－11）；湖北工业大学高层次人才计划项目 （）
