摘要
在青藏铁路的施工建设中,许多主动保护冻土的措施已经被采用,遮阳板就是其中之一.遮阳板措施的保温效果在应用只有1a的时间里面就表现出来,在第1个冷暖季节过后,在遮阳板保护下的路基土体温度就较普通路基低,在路基左路肩部位(阳坡)低出3~5℃;在路基的左右护道、路肩孔和中心孔冻土上限抬升在1.0~1.7m,平均抬升1.1m.遮阳板措施对于保护路基冻土效果较其它主动保护冻土措施更快、更明显,是多午冻土区工程建设中主动保护冻土措施的首选措施之一.
There are a lot of active measures to protect permafrost adopted in the construction of the Qinghai-Tibet Railway, of which one is awning. The heat preservation effect of the awning can be seen after one year's awning. After a cycle of cold and warm seasons, an awninged embankment temperature is 3~5℃ lower than an ordinary em-bankment, and the permafrost table ascends 1.0~1.7 m, with an average of 1.1 m, under the berm, the road shoulder and the road center. The protection effect of awning on permafrost is more categorical and obvious than other active measures of permafrost protection. Awning is one of the toppriority choices to actively protect permafrost.
出处
《冰川冻土》
CSCD
北大核心
2006年第1期108-115,共8页
Journal of Glaciology and Geocryology
基金
中国科学院知识创新工程重大项目(KZCX1-SW-04)
国家重点基础研究发展规划项目(2002CB412704)
中国科学院冻土工程国家重点实验室开放基金项目(SKLFSE200406)资助