开挖路面结构修复三维有限元分析  

Three-Dimension Finite Element Analysis of Excavated Pavement Rehabilitation

作　　者：凌建明[1] 罗志刚[1] 吕荔炫[1] 袁文平 

机构地区：[1]同济大学道路与交通工程教育部重点实验室,上海200092 [2]上海市政工程管理处,上海200030

出　　处：《同济大学学报（自然科学版）》2006年第7期886-890,共5页Journal of Tongji University:Natural Science

基　　金：上海市市政工程管理局科技发展基金资助项目

摘　　要：运用通用有限元程序ANSYS,构建了开挖路面结构修复分析三维有限元模型.通过分析,明确了修复的病害机理以及城市道路路面开挖传统原结构修复技术的缺陷.基于变形控制的敏感性分析,讨论了修复区域回填土路基与基层模量、接触面摩阻力及修复方式等因素对路表弯沉的影响.结果表明,提高修复区域回填土路基模量、适当向两侧开挖台阶是保证开挖路面修复后使用性能的有效措施.To make clear the distress mechanism and rehabilitation principle of excavated pavement, a 3-dimension finite element model was constructed on the basis of the general-purpose finite element program PNSYS. Considering the variation of backfill subgrade, base course, excavated interface friction and overlay sidesteps, the surface deflections at different points on excavated pavement and its surrounding zone were calculated and also compared with the in-situ test data. The study results are presented in this paper. Stiffness difference between excavated zone and its surrounding results in the distress of rehabilitated pavement. Traditional ＂original structure repair method＂ is unsuitable to excavated pavement rehabilitation. Strengthening backfill subgrade and excavating sidesteps are effective to ensure the performance of excavated pavement structure.

关 键 词：城市道路 开挖路面 结构修复 有限元法 

分 类 号：U412.37[交通运输工程—道路与铁道工程]