高寒公路隧道温度场分布规律

对于寒区隧道,冻害问题一直是一个比较棘手的问题,与之密切相关的两个因素就是排水系统和温度场分布。本文通过对青海省共玉公路姜路岭隧道进出口段一定范围内围岩、支护结构及洞内外环境温度的现场监测,确定隧道所在范围围岩冻融圈的范围;沿隧道纵、横断面的温度变化规律以及环境气温的变化情况,继而为防寒泄水洞的设防长度和衬砌结构保温段的长度、保温材料厚度的设计选取提供了依据。

For tunnel in cold regions, frost damage problem is always a difficult problem, two factors are closely related with the drainage system and the distribution of temperature field is. This article through to the Qinghai province Jiang ridge road is the Jade Road Tunnel import and export section within a certain range of surrounding rock, supporting structure and inside and outside of the tunnel temperature field monitoring, to determine the scope of surrounding rock tunnel where freezing thawing circle range; changes of temperature variation along the tunnel＇s longitudinal, cross- sectional and environmental temperature, provides the basis for the selection of design length the thickness of the insulation material, then to fortified length and lining structure of cold insulation section of spillway tunnel.