不同加筋条件对高填方路堤变形控制效果数值分析  

Numerical Analysis of the Effect of Various Reinforcement Conditions on Deformation Control of High Filled Embankment

作　　者：陈建 刘泽[2] 童乐 曹峥 李梦竹 Chen Jian;Liu Ze;Tong Le;Cao Zheng;Li Mengzhu(Henan Jixin Expressway Co.,Ltd.,Luoyang 450018,China;School of Civil Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;Zhejiang Jiaogong Group Co.,Ltd.,Hangzhou 311308,China;School of Civil Engineering,Xiangtan University,Xiangtan 411105,China)

机构地区：[1]河南省济新高速公路有限公司,河南洛阳450018 [2]湖南科技大学土木工程学院,湖南湘潭411201 [3]浙江交工集团股份有限公司,浙江杭州311308 [4]湘潭大学土木工程学院,湖南湘潭411105

出　　处：《市政技术》2024年第12期109-116,共8页Journal of Municipal Technology

基　　金：湖南省自然科学基金项目(2022JJ20357);湖南省教育厅重点科研项目(23A0368);浙江省建设科技项目(2022K069,2022K076)。

摘　　要：依托于济源至新安高速公路工程,基于半路堤缩尺模型试验建立了高填方路堤有限元模型,通过改变筋材类型、筋材长度、加筋层数,对高填方路堤坡顶竖向位移、坡面水平位移变化规律进行了分析。分析结果表明:各加筋条件下高填方路堤水平位移沿坡面均呈“鼓肚”状分布,最大值均出现在2/3坡高处;筋材类型对高填方路堤变形有较大影响;筋材长度对高填方路堤顶部中心线处的竖向位移影响较为显著;土工格室半铺时增加加筋层数会加剧高填方路堤不均匀沉降,7层土工格室满铺是控制高填方路堤坡面水平位移的最优方案。该成果为类似高填方黄土路堤加筋处治方案设计提供了参考。Taken the Jiyuan-Xin’an Expressway project as an example,a finite element model of high filled embankment was established based on a half way embankment scale model test.By changing the type and length of reinforcement materials,as well as the number of reinforcement layers,the vertical displacement at the top slope and the horizontal displacement of the slope surface of the high filled embankment were analyzed.The analysis results show that the horizontal displacement of high filled embankments is distributed in a“bulging”shape along the slope surface,the maximum value occurring at 2/3 of the slope height under various reinforcement conditions;The type of reinforcement material has a significant impact on the deformation of high filled embankments;The length of the reinforcement material has a significant impact on the vertical displacement at the center line at the top of the high filled embankment;During the semi laying of the geogrid,that increasing the number of reinforcement layers will exacerbate the uneven settlement.The optimal solution to control the horizontal displacement of the slope surface is to fully lay the 7-layer geogrid.This achievement provides a reference for the design of reinforcement treatment schemes for similar high filled loess embankments.

关 键 词：高填方路堤 加筋 变形控制 数值分析 

分 类 号：U416.12[交通运输工程—道路与铁道工程]