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寒区隧道保温设防长度工程实践与研究进展综述
庞小冲1(), 朱小明1, 穆彦虎2,3(), 张坤4, 张力杰2,3, 郑波5, 李凌洁2,3
Review on engineering practice and research progress on thermal insulation length of tunnels in cold regions
Xiaochong PANG1(), Xiaoming ZHU1, Yanhu MU2,3(), Kun ZHANG4, Lijie ZHANG2,3, Bo ZHENG5, Lingjie LI2,3

图4. 寒区隧道与空气相互作用及保温设防示意图
注:TmaxTmin分别为洞口年最高温度和年最低温度,T0为设防标准温度,x0为设防长度

Fig. 4. Schematic diagram of interaction between air and tunnel structures in cold regions and determination of thermal insulation length: seasonally frozen ground region (a) and permafrost region (b) (Tmax and Tmin represent annual maximum temperature and annual minimum temperature at the entrance of tunnel, respectively; T0 represents thermal insulation standard temperature; x0 represents thermal insulation length)