ConstructingoftheQinghai-TibetRailroadUsingthePrincipleofCoolingtheRoadbed
- 出版年：2005
- 作者：CHENG Guo-dong
- 单位1：State Key Laboratory of Frozen Soils Engineering, CAREERI,CAS
- 语种：英文
- 作者关键词：Qinghai-Tibet Railroad； permafrost； active cooling； roadbed； climatic warming
- 起始页：1
- 总页数：6
- 刊名：冰川冻土
- 是否内版：否
- 刊频：双月刊
- 创刊时间：1979
- 主办单位：中国地理学会；中国科学院寒区旱区环境与工程研究所
- 主编：程国栋
- 地址：兰洲市东岗西路260号
- 邮编：730000
- 电子信箱：E-mail：edjgg@ns.lzb.ac.cn
- 卷：27
- 期：1
摘要
More than half of the totallength of the Qinghai-Tibet Railroad(QTR)traverses warm(0 to—1℃) permafrost areas, and about 40% of its total length is in ice-rich permafrost areas. The construc-tion of the QTR also must consider the impacts of climatic warming along the QTR during the next 50～100 years. The latest projection indicates a warming of 2.2 to 2.6 C on the Qinghai-Tibet Plateau(QTP) by the year 2050. Therefore, the key to the successful construction of the QTR is to protect per-mafrost from being thawed. Although railroad construction in permafrost areas has had a history of morethan 100 years, the troubled sections of the railroads in permafrost areas have been greater than 30% oftheir total length. Based on the experiences and lessons learned from the road construction in permafrostareas, both in China and abroad, the author proposes that the principle of “active cooling” of railroadroadbed by lowering permafrost temperatures should be used in designing QTR, rather than that of “pas-sive protection” of permafrost through increasing thermal resistance of roadway, such as increasing fillthickness and/or using insulative materials. This is especially important for the road sections in warm,ice-rich permafrost. In addition, this paper proposes several methods for “cooling the roadbed” by con-trolling radiation, convection and conduction through modifyingroadway structure and using different fillmaterials.