公路双侧拓宽差异沉降控制标准研究  

Research on Differential Settlement Control Standard for Road Bilateral Widening Project

作　　者：杨涛[1] 李磊 李国维[3] 

机构地区：[1]上海理工大学环境与建筑学院,上海200093 [2]上海地矿工程勘察有限公司,上海200072 [3]河海大学道路与铁道工程研究所,江苏南京210098

出　　处：《公路交通科技》2014年第5期15-20,共6页Journal of Highway and Transportation Research and Development

基　　金：广东省交通科技项目(2005-02)

摘　　要：建立了能够考虑路面、路基和地基相互作用的弹塑性有限元整体分析模型,通过路面结构在工后差异沉降下的力学响应分析,提出了高速公路双侧拓宽工程差异沉降控制标准,分析了差异沉降曲线形态、面层和基层厚度对差异沉降控制标准的影响。研究表明:差异沉降曲线呈马鞍形分布时,拓宽路基差异沉降控制标准为工后变坡率不超过0.3%;差异沉降曲线呈倒钟形分布时,拓宽路基差异沉降控制标准为工后变坡率不超过0.45%。差异沉降控制标准随面层或基层厚度的增加而减小,保持面层与基层厚度之和不变条件下增加面层或基层厚度,差异沉降控制标准数值不变。An elastic-plastic finite element model which can consider the interaction among pavement, embankment and soft ground is established. The differential settlement control standard for the bilateral widening subgrade of expressway is put forward according to the analysis of the mechanical response of the pavement structure to the post-construction differential settlements. The influence of the shape of differential settlement curve, the thicknesses of surface course and base course on the differential settlement control standard is investigated. The results show that （ 1 ） the post-construction transverse gradient change of 0.3 % can be taken as the differential settlement control standard when the differential settlement curve is saddle shape, and of 0. 45 % when the differential settlement curve is reverse bell shape ; （ 2 ） the values of the standards decrease with the increase of thickness of surface course or base course, and stay the same when the total thickness of surface course and base course remains unchanged.

关 键 词：道路工程 差异沉降控制标准 有限元模型 双侧拓宽路基 路面结构 

分 类 号：U416.1[交通运输工程—道路与铁道工程]