高纬度寒区浅埋隧道的温度场及防寒抗冻探讨  

Discussion of anti-freeze and frost resistance of shallow buried tunnels in high latitude cold region

作　　者：周小涵[1] 曾艳华[1] 杨宗贤[1] 杨昌贤[2] 方伟[2] 

机构地区：[1]西南交通大学交通隧道工程教育部重点实验室,四川成都610031 [2]铁道第三勘察设计院集团有限公司,天津300251

出　　处：《冰川冻土》2016年第1期121-128,共8页Journal of Glaciology and Geocryology

基　　金：国家自然科学基金项目(51278426)资助

摘　　要：专门针对东北高纬度寒区浅埋隧道冻害机理的研究较少,对东北寒区隧道进行了现场温度实测,讨论了东北高纬度寒区浅埋隧道的冻害形成机理和防寒抗冻措施.现场温度实测表明,传统的保温措施无法保证隧道不发生冻害,合理的防排水措施是高维度寒区浅埋隧道的主要防寒抗冻方法.建议在高维度寒区浅埋隧道全长设置中心深埋水沟、排水盲沟和保温侧沟,在冻结深度很大和月平均气温极低的寒区隧道排水设计中建议尝试使用顶进中心深埋水沟的施工方法,以降低工程造价及提高施工安全.中心深埋水沟直径应在80 cm以上,以保证维护的便利.根据洞口地形选择合理的出水口形式,且做好保温防冻措施.Study of freezing injury forming mechanism in shallow buried tunnel in high latitude cold region is lacked.The temperature field of cold region tunnel was measured locally.The freezing injury forming mechanism and antifreeze and frost resistance of shallow buried tunnel in high latitude cold region were discussed.The observations show that the shallow buried tunnel in high latitude region can＇t keep out of freezing injury using traditional heat preservation measures.The waterproof and drainage measures are the main anti-freezing methods of shallow buried tunnel in high latitude cold region.Full-length deep center ditches,sub-drains and side insulation ditches are advised to be used,with the diameter of above 80 cm of the deep center ditches.Pipe jacking method is advised to construct the center deeply buried ditches.The proper anti-freezing measures of the water outlet port should be chosen according to the terrain of the tunnel portal.

关 键 词：高纬度寒区 浅埋隧道 温度场 防寒抗冻 顶进法 

分 类 号：U453.6[建筑科学—桥梁与隧道工程]