昆仑山隧道浅埋段地温特征分析

多年冻土区昆仑山隧道浅埋段出现渗漏水后，浅埋段的地温特征成为治理病害的重要依据之一。根据2004年3～5月份的地质观测资料，分析浅埋段的地温特征，并采用数值模拟技术，追溯隧道工程施工前的地温状态，从而得出该隧道浅埋段2#冲沟存在一个未被冻结的通道；隧道工程对周边地温产生较大影响；最大冻结深度约10 m，最大融化深度不超过4 m。

Analysis of ground temperature at a valley of Kunlun Mountain tunnel

Since water seepage comes out of Kunlun Mountain tunnel at a valley,understanding the ground temperature at the valley is one of the most important things to treat the disease.The ground temperature is studied;it is traced back before tunneling by numerical simulation on the basis of geological observation information from March to May,2004.So it is educed as follows:(1) there is an unfrozen channel underground the valley;(2) the ground temperature around the tunnel is affected by tunneling;(3) the maximum frozen depth is about 10 m;and the maximum thawing depth is not over 4 m.