沥青层隆起变形与松胀现象分析  

Analysis of Uplift Deformation and Loose Phenomena of Asphalt Layer

作　　者：李立寒[1] 陈建军[1] 苏洲[1] 曹林涛[1] 

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

出　　处：《同济大学学报（自然科学版）》2009年第1期52-56,共5页Journal of Tongji University:Natural Science

基　　金：交通部西部交通建设科技资助项目(200431800004)

摘　　要：分析了室内车辙试验试件、加速加载（ALF）车辙试验路芯样，以及沥青路面现场芯样的空隙率与高度变化，证实了在车辆荷载作用下沥青层的隆起变形与松胀现象，探讨了沥青层隆起部位松胀现象的产生机理与影响因素.以隆起系数表征隆起变形在总车辙变形中所占的比例，分析了隆起系数的影响因素与发展规律.通过对比分析，给出隆起系数的建议值范围为0-0.52，当道路宽度较窄时，隆起系数取上限；当道路宽度较大时，隆起系数取下限.The paper presents an analysis of the voids and height transformation of samples employed in Loaded Wheel Tracker tests,and derived from the tests road by Accelerated Loaded Facility application and from asphalt pavement in-site. The results validate that the uplift deformation and loose phenomena occur in asphalt pavement layers under vehicle loads and then the appearance mechanism and influence factors of loose phenomena of asphalt layers uplift place are explored. An analysis is made of the influence factors and development tendency of uplift coefficient, which is a ratio of uplift deformation to total rutting deformation of asphalt layers. The uplift coefficient value range is recommanded to be 0 - 0.52 on the basis of a contrastive analysis. Finally, the paper presents a proposal about the upper limit when the road section is narrow,and the lower limit when it is wide.

关 键 词：沥青层 车辙变形 隆起变形 松胀作用 隆起系数 

分 类 号：U414[交通运输工程—道路与铁道工程]