| 大坂山公路隧道防寒保温门的原理及应用 |
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| 作者单位： | (Communication Department of Qinghai Province; State Key Laboratory of Frozen Soil Engineering，LIGG，CAS; Highway Survey and Design Institute of Shanxi Province; Sixteenth Engineering Department of Railway Ministry |
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| 摘 要： | 大坂山隧道地处严寒地区，年平均气温－3．1℃．无论隧道衬砌层是否敷贴隔热保温层，其围岩都要形成多年冻结圈．相应的衬砌表面应力超过混凝土的强度，终将形成破裂等冻害．若设置防寒保温门，合理地控制其开闭，经估算，防冷冻的效率高达近80％，围岩肯定不形成多年冻结．年平均气温－1℃定为严寒气候与中等寒冷气候的分界．在严寒气候条件下，防寒保温门是公路隧道防冻害的首选对策．
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| 关 键 词： | 大坂山 公路隧道 防寒保温门 |
Principle and Application of the Thermal Insulation Tunnel Door Against Frost Heaving in Dabanshan |
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| Institution: | (Communication Department of Qinghai Province, State Key Laboratory of Frozen Soil Engineering,LIGG,CAS, Highway Survey and Design Institute of Shanxi Province, Sixteenth Engineering Department of Railway Ministry) |
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| Abstract: | |
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| Keywords: | Dabanshan tunnel thermal insulation door |
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