摘要
利用室内重复荷载三轴试验,研究了在含水量、压实度和偏应力影响下粘性路基土的永久变形特性,并以Tseng-Lytton路基土永久变形预估模型形式为基础,对Tseng-Lytton模型进行了改进和标定,建立了粘性路基土的永久变形预估模型;最后利用分层应变总和法,并结合一个典型粒料柔性基层沥青路面结构实例,计算了路基土的永久变形量.
The paper presents a study on permanent deformation characteristics of clayed subgrade soils with different moisture content, compaction degree and deviator stress level on the basis of the repeated load triaxial test. Based on Tseng-Lytton evaluation model for permanent deformation, and evaluation model for permanent deformation of clayed subgrade soils is established by improving and calibrating Tseng-Lytton model. Finally, combined with a case study of typical asphalt pavement structure with granular base, permanent deformation of clayed subgrade soils is calculated with layerwise strain summation method.
出处
《同济大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2008年第11期1521-1525,共5页
Journal of Tongji University:Natural Science
基金
交通部西部交通建设科技项目(200431800004)
关键词
粘性路基土
重复荷载三轴试验
永久变形预估模型
粒料基层
分层应变总和法
clayed subgrade soils
repeated load triaxial test
evaluation model for permanent deformation
granular base
layerwise strain summation method
