In-situ observed study for effect of heat preservation in cold regions tunnels
In-situ observed study for effect of heat preservation in cold regions tunnels
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发表时间：
2003
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通讯作者：
Lai Yuan
中科院分区：
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作者：
Lai Yuan
文中给出了高原寒冷地区隧道的工程实例分析。介绍了该隧道的工程地质条件。给出了隧道内和隧道外的实测气温。根据实测的隧道围岩温度，计算出隧道围岩的冻结深度。通过对实测数据的分析，发现安装保温门的隔热效果要好于安装防雪棚的隔热效果，即隧道两端安装保温门比隧道两端安装防雪棚更适合于寒冷地区隧道的防冻破坏。
In this paper, a case history study of a tunnel in cold plateau regions is given. The engineering geological conditions of the tunnel have been described. The measured air temperatures in the tunnel and outside of the tunnel are presented. According to the measured temperatures of surrounding rocks in the tunnel, the freezing depths of the surrounding rocks in the tunnel are worked out. By analyzing the measured data, it is found that the thermal insulation effect of installation of the thermal insulation door is better than that of installation of the antisnow shed, i.e. the installation of the thermal insulation doors at both ends of the tunnel is more suitable to be used for preventing the tunnel in cold regions from damaging by frost action than the installation of antisnow shed at both ends of the tunnel.