中文摘要：

研究青藏公路冻土区公路横断面地温时空分析方法，获取地温时空变化规律，为公路结构设计、维护及保温材料的选取提供依据。传统的分析方法主要通过绘制地温折线图研究地温随时间或深度的变化规律，方法简单，结果易于理解和应用，但较难发现地温的时空变化规律。该文提出基于GIS的公路横断面地温时空分析方法。选取西大滩实验段编号为K2887十500的横断面为实验靶场，通过建立地温场图层、多时段融区时空动态分析等方法，得出该横断面地温经历了融区收缩、融区扩展及融区过渡3个阶段，并准确计算出各观测时间的融区范围及融区变化速度，实现了横断面地温时空量化分析，其思路对时态GIS相关开发及应用具有参考价值。

英文摘要：

Ground temperature study of Qinghai-Tibet highway has been very important, which can provide key information for the structure design and the selection of insulation materials. The traditional method is based on the temperature line graph to study the ground temperature changes with time and depth, but it is more difficult to find the spatial and temporal change. On the basis of current methods, a new method which is based GIS technology is introduced. Through the establishment of geothermal field and multi-time spatial and temporal analysis, the ground temperature change of highway cross-sectional area becomes easier to obtain. The test for K2887＋ 500 of Xidatan test segment shows the change is divided into three stages （melt area shrinking, melt expansion and melt transition）and the melt range and speed can also be calculated accurately. The method has an important reference value for the development and application of spatial and temporal GIS.