摘要
针对山区公路路基加宽改建中的重力式路肩挡土墙问题,笔者结合G307改扩建工程,通过现场试验,并采用数值模拟方法建立分析模型,对路基和挡土墙的受力与变形特性进行研究,将数值模拟结果与现场实测值进行对比,验证了数值分析结果的可靠性,同时对相关设计及施工参数进行影响性分析。结果表明:在一定宽度限制内,填方路基的稳定性随着加宽宽度的增加而降低;合理控制压实度及填料的选择可以较大幅度的提高路基及挡土墙的稳定性;控制老路基边坡土体的开挖,可以改善路基和挡土墙的工作性能;对地基进行一定深度的换填处理,可以减小墙身水平位移量。
Aiming at the problem of gravity shoulder retaining wall setting under widening and rebuilding roadbed of mountainous highway,the analysis model was established by field test and numerical simulation,combining with G307 reconstruction and extension project.The stress and deformation characteristics of subgrade and retaining wall were studied.The reliability of the numerical analysis results was verified by comparing the numerical simulation results with the field measured values.At the same time,the related design and construction parameters wtrt analyzed.The results show that the stability of the fill subgrade decreases with the widening width within a certain width limit;the stability of roadbed and retaining wall can be greatly improved by reasonably controlling the compaction degree and the selection of filling materials;the working performance of the roadbed and retaining wall can be improved by controlling the excavation of the soil mass of the old roadbed slope;the horizontal displacement of the wall body can be reduced by replacing the foundation with a certain depth.
作者
冯忠居
王溪清
芦佳
张晓轴
常应宏
FENG Zhongju;WANG Xiqing;LU Jia;ZHANG Xiaozhou;CHANG Yinghong(School of Highway.Chang'an University.Xi'an 710064,Shaanxi,P.R.China;Yulin Highway Administration of Shaanxi Province,Yulin 710009,Shaanxi,P.R.China)
出处
《重庆交通大学学报（自然科学版）》
CAS
CSCD
北大核心
2019年第11期69-75,共7页
Journal of Chongqing Jiaotong University(Natural Science)
基金
陕西省交通科技项目(09-04)
中央高校基本科研业务费专项资金项目(300102218115)
关键词
道路工程
山区公路
加宽路基
挡土墙
数值模拟
highway engineering
mountain road
subgrade widening)retaining wall
numerical simulation
作者简介
第一作者:冯忠居(1965-),男,山西万荣人,教授,博士,主要从事公路桥梁与岩土工程方面的研究。E-mail:ysf@gl.chd.edu.cn。
