摘要
详细介绍了粒径改良路基的设计思路及现场测试方案。并通过现场测试资料,详细地分析了粒径改良路基在冻融循环下变形随时间的变化规律。结果表明:粒径改良路基变形随冻融循环过程表现出相应的冻胀和融沉变形。从时间上看,同通风路基相比,粒径改良路基在一定程度上缩短了路基的冻结时间,同时减缓了冻胀变形。
The design idea and the spot experimental scheme of the particle improved roadbed are analysed in detail and deformed law with time of the particle improved roadbed in the cycle of freezing and thawing. The results indicate that the deformation of the particle improved roadbed presents the corresponding frost - heave deformation with the cycle of freezing and thawing. As compared with the ventilated embankment, the particle improved roadbed can, to some extent, shorten the freezing period and ease the frost-heave deformation.
出处
《重庆大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2007年第5期35-38,共4页
Journal of Chongqing University
基金
中科院知识创新工程重大项目(KZCXI-SW-04)
重庆市教育委员会科学技术研究项目(KJ060403)
重庆交通大学校内科学基金项目资助
关键词
粒径改良路基
变形
青藏铁路
多年冻土
the particle improved roadbed
deformation
Qinghai- Tibetan railway
permafrost