地铁区间隧道壁面温度特征实测研究

Study on measured wall temperature characteristics of underground railway interval tunnels

选取广州地铁不同运营年限的5条线路进行了区间壁面温度测试,测试结果表明:区间隧道内沿列车行进方向,壁面温度呈上升趋势,区间尾部的温度最高;区间壁面温度与室外气温有一定相关性,但受室外气温影响具有滞后性;行车计划达到远期的线路,区间最热月平均温度比初期线路高4℃左右;行车对数是影响隧道温升的主要原因,行车计划达到远期工况后,隧道温度趋于稳定,若行车对数不变,隧道温度不再随运营年限增加而升高。

Selects five lines of Guangzhou underground railways with different operating years for the tunnel wall temperature test.The results show that the wall temperature rises along with the direction of train travel in the interval tunnel,and the temperature at the end of the interval tunnel is the highest.There is a certain correlation between the tunnel wall temperature and the outdoor temperature,but it has hysteresis influenced by the outdoor temperature.When the driving plan reaches the long-term plan»the hottest monthly average temperature in the tunnel is about 4℃higher than that of the initial line.The number of train running pairs is the main reason affecting the temperature increase of the tunnel.After the driving plan reaches the long-term working condition,the tunnel temperature tends to be stable.If the number of train running pairs is stable,the tunnel temperature will no longer increase with the operating years.