热管在青藏高原多年冻土区高速公路应用中的适用性评价  

Applicability evaluation on application of thermosyphon in embankment engineering of expressway in permafrost regions of Qinghai-Tibet Plateau

作　　者：孔森 温智 吴青柏 王大雁 KONG Sen;WEN Zhi;WU Qingbai;WANG Dayan(State Key Laboratory of Frozen Soil Engineering,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Science,Lanzhou 730000,China;School of Earth Science,University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院西北生态环境资源研究院冻土工程国家重点实验室,甘肃兰州730000 [2]中国科学院大学地球科学学院,北京100049

出　　处：《中南大学学报（自然科学版）》2019年第6期1384-1391,共8页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(41690144,41871054,41771073);中国科学院国际合作局对外合作重点项目(131B62KYSB20170012);冻土工程国家重点实验室自主课题(SKLFSE-ZT-22)~~

摘　　要：为了研究多年冻土区高速公路热管路基的制冷效果及适用范围,建立热管路基水热计算模型,分析不同条件下的热管路基冻土人为上限深度和热稳定状态,并将路基高度、年平均气温、气温年较差3个因素形成组合进行热管的适用范围分析。研究结果表明:对于气温年较差为12℃的冻土区,高度为4m的热管路基适用于年平均气温低于-5.5℃的区域,高度为3m的热管路基适用于年平均气温低于-5.8℃的区域;对于青藏高原大部分地区,在15a的运营期限内,高速公路热管路基具有一定的局限性,其服役期限内不能保持路基稳定性;但对于风火山地区,采用高度为3m的热管路基可以保证工程稳定性。In order to study the cooling effect and the application range of thermosyphon in embankment engineering of expressway in permafrost regions,a hydrothermal model was established,in which the artificial permafrost table and thermal stability status of the embankment with thermosyphon under the different environmental conditions were analyzed.And the application scope of thermosyphon was analyzed by combining the three factors of road height,annual average temperature and annual difference.The results show that for the area with annual difference of 12 ℃,the application scope of embankment with the height of 4 m is the annual average temperature lower than about -5.5 ℃,and the application scope of embankment with the height of 3 m is the annual average temperature lower than about -5.8 ℃.The embankment with thermosyphon has certain limitations and can’t maintain the stability of the engineering during its service period of 15 a in most of Qinghai Tibet Plateau area,but the thermosyphon embankment with the height of 3 m can be applied in the area of Fenghuoshan.

关 键 词：热管 冷却效果 路基高度 年平均气温 气温年较差 

分 类 号：U416.168[交通运输工程—道路与铁道工程]