东南大学学报（自然科学版）2011，Vol.41Issue(1)：181-185,5.DOI:10.3969/j.issn.1001-0505.2011.01.035
融沉变形对柔性路面应力应变影响试验研究
Influence of thawing settlement deformation on stress and strain in flexible pavement
摘要
Abstract
In order to study the influence of subgrade thawing settlement deformation on the mechanical properties of flexible pavement in permafrost region, two thawing settlement deformation simulation methods of frozen soil subgrade, i.e. loose paving soil and burying industrial ice block, were adopted. Laboratory large-scale experiment tank of flexible pavement structure was built and transducers were buffed layer by layer. The stress and strain detection of flexible pavement surface course and base course were carried out by bearing plate test method. Through the analysis of detection data, the influence law of thawing settlement deformation on stress and strain of flexible pavement was obtained. The results show that the bottom strain of surface course and base course of loose paving soil and burying industrial ice block measuring points are both significantly increased compared to the normal measuring points. The surface course of thawing settlement measuring point bears more stress than the surface course of normal measuring point. Thawing settlement deformation has a larger effect on nonlinear characteristics of strain in layers bottom especially bottom of base course. Power function can well describe its nonlinear variation law. The research result will provide a reference for flexible pavement design in permafrost regions.关键词
融沉变形/柔性基层/沥青路面/应力应变/室内试验Key words
thawing settlement deformation/ flexible base/ asphalt pavement/ stress and strain/ laboratory experiment分类
交通工程引用本文复制引用
钟勇强,黄晓明,廖公云,路畅,何平..融沉变形对柔性路面应力应变影响试验研究[J].东南大学学报（自然科学版）,2011,41(1):181-185,5.基金项目
西部交通建设资助项目(200731849055). （200731849055）
