摘要
青藏铁路穿越高原多年冻土区546 km,沿线分布着各种地形地貌单元,包括盆地、高山区、高平原、谷地等,各处的地层岩性和冻土赋存环境各不相同.通过对青藏高原多年冻土区典型土样的冻胀率试验,分析了高原多年冻土的冻胀率与含泥量、含水率、干密度之间的规律.结果表明:高原冻土具有较大的冻胀率,其冻胀率随含泥量的增加而增加,随含水率的增大而增大,随干密度增大而减小.
There is a plateau permafrost area, about 546 km in length, along the Golmud-Lhasa Railway. In this permafrost area various landforms developed, including basin, mountainous, plateau and valley, with different geology and frozen soil conditions. An experimentation of frost-heaving ratio had done and the typical soil samples were taken from the permafrost area along the Golmud-Lhasa Railway. On the basis of the experimenta- tion data, the relationships among the frost-heaving ratio, the silt content, the water content and the dry bulk density have been analyzed. It is found that the permafrost has a higher frost-heaving ratio, and the frost-heaving ratio increases with silt content and water content, but decreases with dry bulk density.
出处
《冰川冻土》
CSCD
北大核心
2011年第4期863-866,共4页
Journal of Glaciology and Geocryology
基金
科技部科研院所技术开发研究专项资金项目(2011EG/23262)资助
关键词
青藏铁路
多年冻土区
冻胀率
含泥量
含水率
Golmud-Lhasa Railway
permafrost regions
frost-heaving ratio
silt content
water content
