寒区公路隧道保温防冻及节能技术分析

Analysis of Insulation Antifreeze and Energy Saving Technology in Highway Tunnel in Cold Region

为应对寒区隧道冻害,防寒保暖研究不断朝着节能、绿色环保方向发展。结合现场调查,讨论和分析了主要保温方法的研究成果和应用现状,结果表明,铺设保温层等被动保温措施不能彻底消除冻害;使用电加热初期投资少,但后期运营成本较高,带来污染;地热能作为可重复再生的、清洁环保的一次能源,将其应用于寒区隧道的防冻保暖,可以实现节能减排;并分析了利用地热能进行隧道保温防冻的优化设计方法;进一步提出了未来寒区公路隧道防冻害的发展方向。

In order to cope with the frost damage of tunnel in cold region, continuous studies have been towards the direction of environmental protection and energy saving. Based on field investigation, discussion and analysis of the main insulation method studies and applications. The results show that the insulation layer of passive insulation measures cannot completely eliminate damage; the cost is not high in the early service stage of the electric heat tracing system, but the operating cost is high, with pollutions to the environment; geothermal energy, as renewable and clean primary energy, its application in the tunnel warm of freezing cold area can realize energy saving and emission reduction; and the optimization design method of using geothermal energy for tunnel heat insulation is analyzed and further to put forward the future development direction of freezing damage of highway tunnel in cold region.