同济大学学报（自然科学版）2013，Vol.41Issue(3)：386-389,457,5.DOI:10.3969/j.issn.0253-374x.2013.03.012
黏质路基土永久变形改进计算方法
Improved Calculation Method of Permanent Deformation for Cohesive Subgrade Soil
摘要
Abstract
The paper presents a study on permanent deformation characteristics of clayed subgrade soils on the basis of the repeated load triaxial test. The relationship between permanent strain and loading times was tested through 36 working conditions. A prediction model for permanent deformation of cohesive subgrade soils is established by improving and calibrating AASHTO 2002 model. With a consideration of the highly channelized road traffic, the itemize and layerwise summation method is proposed on the basis of the layerwise summation method as the improved method to calculate permanent deformation of cohesive subgrade soil under vehicle repeated load, calculation principle and steps of the proposed method were explained in detail. Based on a case study of a typical asphalt pavement structure, permanent deformation of clayed subgrade soils is calculated, and a comparative study verifies the rationality of this method.关键词
柔性路面/黏质路基土/永久变形/分条分层总和法Key words
flexible pavement/ cohesive subgrade soils/ permanent deformation/ itemize and layerwise summation method分类
交通工程引用本文复制引用
李冬雪,凌建明,钱劲松,王海林..黏质路基土永久变形改进计算方法[J].同济大学学报（自然科学版）,2013,41(3):386-389,457,5.基金项目
国家"八六三"高技术研究发展计划(2012AA112505) （2012AA112505）
国家自然科学基金(50908176) （50908176）
交通运输部西部交通建设科技项目(2010318822003) （2010318822003）
