高速公路加宽数值分析  

Numerical Analysis of Expressway Widening

作　　者：王健飞[1] 

机构地区：[1]石家庄铁道学院土木工程分院,石家庄市050043

出　　处：《勘察科学技术》2008年第6期6-9,共4页Site Investigation Science and Technology

摘　　要：老路堤的加宽是高等级公路建设中的重要课题,该文采用摩尔-库仑理想弹塑性有限元方法对新老路堤的相互作用机理进行研究,应用岩土工程专业软件Plaxis对老路的加宽过程进行了有限元数值模拟。分析表明:加宽部分路堤的填筑将会使得老路中心上抬,路肩点发生较大附加沉降,引起老路路肩与路中心间差异沉降的产生,极易导致对原路堤、路面破坏,降低道路等级,因此为确定实际地基处理施工中重点处置区的位置提供了一些理论参考。Pavement performance in widened roads has been a great concern for highway engineers in roadwidening related design and construction projects. The finite element technique using Mohr-Coulomb elasto plastic soil behavior model is applied to the analysis of interaction mechanism between the old and new embankments in the widening of highway embankments on soft foundation soils with Plaxis, a geotechnique-tailored commercial software. Conclusions are gained that the construction of new embankment induces differential setdement between the center and the shoulder of old embankment, then pavement cracking happens and the grade of highway is debased. At the end, recommendations are made for design-constrnction based on the resuits of numerical simulation.

关 键 词：路堤加宽 变形特性 有限元方法 

分 类 号：U416.12[交通运输工程—道路与铁道工程]