寒区铁路隧道抗防冻技术  

Anti-freezing Technology for Railway Tunnels in Cold Region

作　　者：马志富 杨昌贤 MA Zhifu;YANG Changxian(Civil Engineering Design Research Department,China Railway Design Corporation,Tianjin 300308,China)

机构地区：[1]中国铁路设计集团有限公司土建工程设计研究院,天津300308

出　　处：《中国铁路》2020年第12期74-81,共8页China Railway

基　　金：中国国家铁路集团有限公司科技研究开发计划项目(P2019G040);中国铁路设计集团有限公司科研开发重大项目(2019YY120301);中国铁路设计集团有限公司科研开发引导项目(7217106)。

摘　　要：寒区铁路隧道呈两端出露的管道型建筑物,由于气压、自然风及列车活塞风的影响,隧道内温度受洞外环境温度影响明显,表现为当寒暖变化、冻融交替时,出现因结构渗漏水造成的拱墙挂冰和隧底积冰,以及因冻胀性围岩或结构背后存在空洞积水冻胀作用导致衬砌开裂等病害,已成为困扰寒区隧道运营的主要难题。因此,抗防冻技术是寒区铁路隧道的关键技术。围绕寒区特点,对隧道抗防冻设计、施工和运维的技术特点进行系统论述,为隧道抗防冻工程的规范化提供借鉴。The railway tunnels in cold region are a tube-type building with both ends exposed.Due to the influence of air pressure,natural wind and train piston wind,the temperature inside the tunnels is obviously affected by the ambient temperature outside.In the change of temperature and alternation of freezing and thawing,there will be ice hanging on the arch wall and ice deposited at the bottom of the tunnel due to structural leakage,and the crack of lining due to frost-heaving surrounding rock or cavity water behind the structure,which have become the main issues that troubling the tunnel operation in cold region.Therefore,anti-freezing technology is the key for railway tunnel construction in cold region.According to the characteristics of cold region,this paper systematically discusses the technical characteristics for anti-freezing design,construction,and operation and maintenance of tunnels,which provides a reference for the standardization of tunnel antifreezing engineering.

关 键 词：铁路隧道 寒区 抗防冻 保温层 排水系统 

分 类 号：U452[建筑科学—桥梁与隧道工程] U455[交通运输工程—道路与铁道工程]