红黏土路堤填挖交界段工后沉降变形研究  

Study on post construction settlement deformation of filling and excavation junction section of red clay embankment

作　　者：付宏渊 刘忠伟 邱祥 罗震宇 FU Hongyuan;LIU Zhongwei;QIU Xiang;LUO Zhenyu(School of Civil Engineering,Changsha University of Science&Technology,Changsha 410114,China;Changsha Road and Bridge Construction Co.,Ltd.,Changsha 410017,China)

机构地区：[1]长沙理工大学土木工程学院,湖南长沙410114 [2]长沙市公路桥梁建设有限责任公司,湖南长沙410017

出　　处：《交通科学与工程》2023年第2期1-7,15,共8页Journal of Transport Science and Engineering

基　　金：国家自然科学基金资助项目(51838001,52078066,51908073);长沙理工大学专业学位研究生“实践创新与创业能力提升”项目(SJCX202018)。

摘　　要：为探究多种因素作用下红黏土路堤填挖交界段工后沉降变形规律,对红黏土路堤填挖交界段工后沉降变形进行数值模拟,分析不同分层台阶厚度、分层台阶宽度、含水率等因素对红黏土路堤填挖交界段顶面工后沉降变形的影响规律。研究结果表明:各因素对路堤填挖交界段顶面工后沉降变形的影响程度为:分层台阶厚度>含水率>分层台阶宽度。分层台阶厚度与顶面工后沉降变形峰值呈正相关;含水率越大,路堤顶面工后沉降变形峰值越大;随着分层台阶宽度的增加,路堤顶面工后沉降变形峰值基本一致;路堤工后整体变形峰值出现在填方段的中部,工后整体变形峰值与分层台阶厚度呈正相关。该结论可为红黏土路堤施工与变形控制提供参考。To investigate the deformation law of post-construction settlement of red clay embankment fill-excavation junction section under the action of various factors,numerical simulation of postconstruction settlement deformation of red clay embankment fill-excavation junction section was carried out.,The effect of various factors such as thickness of stratified step,width of stratified step and moisture content on the post-construction settlement deformation of the top surface of the red clay embankment fill-excavation junction section was studied.The results show that the influence of postconstruction settlement deformation on the top surface of the embankment fill-excavation junction section is in descending order of thickness of stratified step,water content,and width of stratified step.The thickness of the stratified steps is positively correlated with the peak value of post-work settlement deformation of the top surface.The peak value of post-construction settlement deformation of the top surface of the embankment remains consistent with the increase of the width of the layered steps.The higher the water content,the higher the peak of post-construction settlement deformation at the top surface of the embankment.The peak of the overall post-construction deformation of the embankment appears in the middle of the fill section,and the peak of the overall post-construction deformation is positively correlated with the thickness of the stratified steps.The research results can provide reference for construction and deformation control of red clay embankment.

关 键 词：填挖交界段 数值模拟 红黏土路堤 工后沉降变形 

分 类 号：U416.1[交通运输工程—道路与铁道工程]