TBM施工引水隧洞降温技术研究  

Study of Cooling Technology for Long TBM Water Diversion Tunnel

作　　者：于丽[1,2] 王晓亮 王明年[1,2] 魏军政[3] 田源[1,2] YU Li;WANG Xiaoliang;WANG Mingnian;WEI Junzheng;TIAN Yuan(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,Sichuan,China;Key Laboratory of Transportation Tunnel Engineering,Ministry of Education,Southwest Jiaotong University, Chengdu 610031,Sichuan,China;China Railway First Survey and Design Institute Group Co.,Ltd.,Xi′an 710043,Shaanxi,China)

机构地区：[1]西南交通大学土木工程学院,四川成都610031 [2]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 [3]中铁第一勘察设计院集团有限公司,陕西西安710043

出　　处：《隧道建设（中英文）》2018年第11期1778-1784,共7页Tunnel Construction

基　　金：国家自然科学基金面上项目(51578458);陕西省科技统筹创新工程计划课题(2013KTZB03-01-02)

摘　　要：TBM施工时,岩温和机械发热所产生的大量热量会导致隧洞内的温度环境恶化,TBM掘进面附近的温度控制是影响连续长距离掘进的重要因素之一。为制定合理的TBM施工段降温措施,采用传热学理论,对采用压入式独头通风的TBM施工隧洞内的温度分布规律进行研究,并以引汉济渭岭北段TBM 5#斜井工区为例进行验证。通过引入空调工程中焓值的概念,确定TBM隧洞人工降温的冷负荷,对常见的降温措施进行对比讨论,进而确定TBM施工隧洞的降温措施。研究表明:隧洞内的空气温度与隧洞壁温、通风风温、通风风量、盾构的发热功率、隧洞周长、通风长度、风管侧壁传热系数和隧洞侧壁的换热系数等参数有关;对于TBM掘进面附近高温、高湿的环境,只能采取人工制冷降温措施进行降温。During the construction of TBM tunnel,the temperature environment inside the tunnel will deteriorate due to the large amount of heat generated by the rock temperature and the mechanical heating.The temperature control near the TBM excavation face is one of the important factors influencing continuous long-distance excavation.In order to formulate reasonable cooling measures for TBM section construction,the heat transfer theory is adopted to study the temperature distribution law with dead-end forced ventilation tunnel.The law is certificated by the test data of work area of TBM inclined shaft#5 in the north section of Hanjiang River-Weihe River Water Conveyance project.By introducing the concept of enthalpy in air conditioning engineering,the load of artificial cooling of TBM tunnel is determined,and common cooling measures are compared and discussed,so as to determine the cooling measures of TBM tunnel construction.The study results show that:(1)The air temperature in the tunnel is associated with the tunnel wall temperature,ventilation air temperature,ventilation air volume,heat generation power of shield in the tunnel,tunnel circumference,ventilation length,heat transfer coefficient of the sidewall of the air duct and heat transfer coefficient of the sidewall of the tunnel.(2)For the environment of high-temperature and high-humidity near the tunneling face,only artificial refrigeration cooling measure can be used to reduce the temperature.

关 键 词：引水隧洞 TBM 独头压入式通风 降温措施 热量 温度 

分 类 号：U459.6[建筑科学—桥梁与隧道工程]