青藏公路路基路面不均匀变形的处治指标  

Treatment Indexes of Inhomogeneous Deformation for Subgrade and Pavement of Qinghai-Tibet Highway

作　　者：李洪蛟 吴婷婷 支喜兰[2] 

机构地区：[1]中国葛洲坝集团国际工程有限公司,北京100022 [2]长安大学教育部特殊地区道路重点实验室,陕西西安710064

出　　处：《公路交通科技》2012年第3期29-34,38,共7页Journal of Highway and Transportation Research and Development

基　　金：交通运输部西部交通建设科技项目(2009 318 000 027)

摘　　要：为了有效预防或减轻青藏公路路基路面的不均匀变形病害问题,大大提高路面的使用性能和行车的安全舒适性,通过前期的现场调研数据结果,分析了青藏公路路基路面不均匀变形的现状和病害机理,在此分析基础上建立对称的路基单元模型为平面应变问题的ABAQUS二维有限元模型。通过ABAQUS有限元模型计算进一步分析了路基路面的横向不均匀变形引起的附加应力,研究了纵向不均匀变形与路基高度、路基填土模量、季节活动层模量、融化区模量及融化区深度的相关关系。最终从结构破坏角度提出了横向不均匀变形处治时的控制指标,从行车舒适性和安全性的角度提出了纵向不均匀变形处治时的控制指标。In order to effectively prevent or reduce the diseases about inhomogeneous deformation of subgrade and pavement of Qinghai-Tibet highway and greatly improve the road performance and driving safety and comfort,according to the pre-site survey data,we analysed the Qinghai-Tibet highway subgrade and pavement inhomogeneous deformation status and disease mechanism.On this basis,we established the analysis symmetric subgrade unit model as ABAQUS 2D plane strain finite element model.Through the ABAQUS finite element model,we further analysed the additional stress of caused by the lateral inhomogeneous deformation of subgrade and pavement,and analysed the correlation of vertical inhomogeneous deformation with embankment height,embankment filling modulus,season active layer modulus,melt district modulus and the melt zone depth.Finally,we proposed the control targets of lateral inhomogeneous deformation treatment from the perspective of structural damage,and proposed the control targets of longitudinal inhomogeneous deformation treatment from the angle of driving comfort and safety.

关 键 词：道路工程 处治指标 有限元分析 青藏公路 路基 路面 不均匀变形 

分 类 号：U418[交通运输工程—道路与铁道工程]