沥青缓冲封层对水泥混凝土路面结构力学性能的影响  

Impact of Asphalt Buffer Layer on the Mechanical Properties of Cement Concrete Pavement

作　　者：刘斌[1] 姚佳良[1] 沈丽[2] 

机构地区：[1]长沙理工大学交通运输工程学院,长沙市410004 [2]山东交通学院,济南市250357

出　　处：《公路》2016年第1期13-17,共5页Highway

基　　金：国家自然科学基金;项目编号51578080;湖南省交通运输厅科研项目;项目编号51178064

摘　　要：在新修订的《公路水泥混凝土路面施工技术规范》（JTG F30）版本中提出了缓冲封层设置技术,它是提高路面性能指标的重要措施。文中利用三维有限元方法,就设置缓冲封层与不设置缓冲封层的水泥混凝土路面进行对比,以面层与基层层底拉应力、路表弯沉、层间最大剪应力为考核指标,计算了静力荷载作用下路面力学响应情况。以及通过温度应力分析,说明设置沥青缓冲封层是减小路面结构温度应力的有效措施,提出最适合缓冲封层厚度为30-50mm。The technology of buffer sealing layer in the newly revised Technical Specifications for Construction of Highway Cement Concrete Pavements （JTG F30） is put forward, which is an important measure to improve pavement performance indexes. In the paper a three-dimensional finite element program is used to analyze the mechanical response of asphalt seal layer under cement concrete pavement, bottom tensile stress in the surface layer and base layer, surface deflection and maximum shear stress between the layers as evaluation indexes, to calculate the mechanical response of cement concrete pavement under the action of static loads. Analysis of thermal stress of cement concrete pavement with asphalt buffer layer shows that setting asphalt buffer layer is an effective measure to reduce thermal stresses of pavement structure, and the most suitable buffer layer thickness is proposed as 30-50 mm.

关 键 词：水泥混凝土路面 缓冲封层 层底拉应力 路表弯沉 层间最大剪应力 

分 类 号：U416.216[交通运输工程—道路与铁道工程]