高模量土基对沥青路面结构设计的影响  

The Influence of Soil Base with High Modulus on the Asphalt Pavement Structure Design

作　　者：张敏江[1] 王东博[1] 于保阳[1] 

机构地区：[1]沈阳建筑大学土木工程学院,辽宁沈阳110168

出　　处：《沈阳建筑大学学报（自然科学版）》2010年第5期899-904,共6页Journal of Shenyang Jianzhu University：Natural Science

基　　金：辽宁省交通厅重点科研项目(200702)

摘　　要：目的研究高模量土基下沥青路面结构三维应力响应,并推荐出高模量土基下路面结构形式.方法结合辽宁省滨海公路建设中所借鉴的南非"强基薄面"的工程经验,利用有限元软件建模研究土基模量变化下沥青路面结构设计参数的变化规律,并给出高模量土基下沥青路面合理结构形式.结果计算结果表明高模量土基可以有效地减小沥青路表弯沉值,并且对改善各结构层层底弯拉应力起到了一定作用;在高模量土基下,基层厚度可以适当减薄15～20cm,面层改用橡胶沥青的新型沥青路面结构形式路用效果更佳.结论高模量土基有效提高路基的强度与刚度,土基上部结构层可以适当减薄,新型"强基薄面"路面形式适合辽宁省应用.This paper studies the three-dimensional stress of soil base with high modulus on the asphalt pavement structure.The structure forms of soil base with high modulus on asphalt pavement is recommended.Based on the engineering experience of South Africa ＂Strong Foundation and Thin Pavement＂,which was used in the Liaoning coastal highway construction.Finite element modeling was used to study the change of the asphalt pavement design parameters with the change of the modulus of soil base,suggesting the reasonable asphalt pavement struction of soil base with high modulus.Results indicate that soil base with high modulus can effectively reduce deflection value of asphalt pavement and the tensile stress of bottom layers of the structure.When the modulus of soil base is high,the thickness of subgrade can be appropriately reduced by 15~20 cm,and rubber asphalt is used as pavement which makes road performance of new asphalt pavement structure better.High modulus soil base effectively improves the strength and rigidity of subgrade,the top structure layer of soil base can be properly reduced,the new type of ＂Strong Foundation and Thin Pavement＂ structure can be applied in Liaoning province.

关 键 词：高模量土基 有限元 强基薄面 冲击压实 结构分析 

分 类 号：U416[交通运输工程—道路与铁道工程]