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.
作者
于丽
王晓亮
王明年
魏军政
田源
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)
出处
《隧道建设（中英文）》
北大核心
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)
关键词
引水隧洞
TBM
独头压入式通风
降温措施
热量
温度
water diversion tunnel
tunnel boring machine(TBM)
dead-end forced ventilation
cooling measure
heat
temperature
作者简介
于丽(1978—),女,辽宁大连人,2009年毕业于西南交通大学,桥梁与隧道工程专业,博士,副教授,主要从事隧道与地下结构设计理论与防灾救援技术的研究与教学工作。E-mail:yuli_1026@home.swjtu.edu.cn;通信作者:王晓亮,E-mail:770270346@qq.com。
