寒区隧道保温设防长度工程实践与研究进展综述
庞小冲, 朱小明, 穆彦虎, 张坤, 张力杰, 郑波, 李凌洁

Review on engineering practice and research progress on thermal insulation length of tunnels in cold regions
Xiaochong PANG, Xiaoming ZHU, Yanhu MU, Kun ZHANG, Lijie ZHANG, Bo ZHENG, Lingjie LI
表4 寒区隧道低洞口结构抗冻设防建议长度27
Table 4 Suggested lengths for thermal insulation at lower entrance of tunnels in cold regions27
设计分区高纬度地区高海拔地区
1月平均气温/℃设防段长度/m1月平均气温/℃设防段长度/m
-8~-4不设≥-0.5不设
-15~-8500~1 000-4.7~-0.5500
-20~-151 000~1 500-8.9~-4.7500~1 000
-28~-201 500~2 000-13.1~-8.91 000~1 500
≤-28≥2 000≤-13.11 500~2 000