摘要
结合片石气冷加碎石护坡组合路基、片石气冷路基、碎石护坡路基、热棒路基及普通素土路基等结构形式地温和变形的现场监测数据,对青藏铁路多年冻土区路基人为上限的变化规律、形态特点和类型进行分析。结果表明,青藏铁路多年冻土区路基的人为上限形态类型为人为上限升入路基本体的A型和人为上限升入基底土层中的B型,且路基人为上限的变化已基本趋于稳定;随着时间的推移,路基的沉降也逐渐趋稳;路基累计沉降量与路基高度成正比而与人为上限的上升值成反比。
The change law,the morphological characteristics and the types of the artificial upper limits for the roadbeds of Qinghai-Tibet Railway in the permafrost region were analyzed based on the in-situ monitoring data of the ground temperature and the deformation for the rubble air-cooled roadbed with riprap slope protection,the rubble air-cooled roadbed,the roadbed of riprap slope protection,the roadbed with two-phase closed thermosyphon and the common roadbed.The results indicate that the shapes of the artificial upper limits for these roadbeds are divided into type A uplifting into the roadbed body and type B uplifting in the soil layer of the roadbed basement.And these changes fundamentally tend towards steady.The settlement of the roadbed also gradually tends towards steady as the time goes by.The accumulation settlement of the roadbed is in direct proportion to the roadbed height but is in inverse proportion to the rising value of the artificial upper limit.
出处
《中国铁道科学》
EI
CAS
CSCD
北大核心
2010年第5期1-7,共7页
China Railway Science
基金
铁道部科技研究开发计划项目(2003G021-D)
关键词
多年冻土区
路基
人为上限
稳定性
沉降
青藏铁路
Permafrost
Roadbed
Artificial upper limit
Stability
Settlement
Qinghai-Tibet Railway
