昆仑山隧道冻融特征分析

Analysis of frozen-thaw property of Kunlun Mountain tunnel

从分析昆仑山隧道渗漏水地形特征入手,得出沟谷地形是多年冻土隧道渗漏水的原因,重新定义移动边界概念,提出产生移动边界特征的充要条件,为进一步认识多年冻土提供了理论依据。引入移动边界计算模型,分析了计算参数的取值原则,采用有限元技术,利用该模型计算和预测冻土的融化深度,并将计算结果与工程实际进行比较,最后得出昆仑山隧道冻融区的变化规律,为隧道病害治理提供了可靠途径。

Channel is the reason resulting in water seepage from Kunlun Mountain tunnel by analyzing relationship between location of seepage and terrain. Moving boundary is redefined to rediscovery permafrost; and the essential conditions resulting in moving boundary are presented too. A computational model of moving boundary is introduced to compute thawed depth of permafrost; and how to determine some parameters is discussed. The computational results are compared with the actual ones. The disciplinarian of variation of frozen-thaw range around Kunlun Mountain tunnel is drawn to treat disease of the tunnel finally.