土工格栅加固处理软土路基优化研究  

Study on Optimization of Soft Soil Subgrade Strengthened by Geogrid

作　　者：孙勇[1] SUN Yong(Kaifeng University,Kaifeng,Henan 475004,China)

机构地区：[1]开封大学

出　　处：《公路工程》2019年第6期119-122,146,共5页Highway Engineering

基　　金：河南省科技攻关计划项目(172102210393);开封市2018年科技发展计划工业公关项目(1801011)

摘　　要：以土工格栅加固某软土路基扩宽工程为背景,运用MIDAS/GTS有限元软件建立路基三维模型,针对不同土工格栅加筋层数的软土路基进行位移、应力及稳定性对比分析,优选出最佳的土工格栅加固层数。研究结果表明:增大土工格栅加筋层数可以有效减少路基的位移和应力,提高稳定系数;当加筋层数为3层时,路基位移、应力减小幅度较大,加筋效果最明显;考虑到减小施工难度和降低工程成本等因素,选择铺设3层土工格栅加筋层为最优方案。Taking the widening project of a soft soil subgrade strengthened by geogrid as the background,a three-dimensional model of subgrade is established by using MIDAS/GTS finite element software,and the displacement,stress and stability of soft soil roadbed with different geogrid reinforcement layers are compared and analyzed.The optimum reinforcement scheme of geogrid is optimized.The results show that increasing the number of geogrid reinforcement layers can effectively reduce the displacement and stress of roadbed and improve the stability factor,and when the number of reinforced layers is 3 layers,the displacement and stress of roadbed decrease greatly,and the reinforcement effect is the most obvious.Considering the factors such as reducing construction difficulty and engineering cost,three layers of geogrid reinforcement layer is selected as the most important factor.Excellent scheme.

关 键 词：土工格栅 软土路基 应力 位移 稳定系数 

分 类 号：U41[交通运输工程—道路与铁道工程]