中文摘要：

为了有效地对较大范围内青藏高原冻土形变进行研究，改进了永久散射体方法，并将其应用于青藏铁路北麓河段的冻土形变研究。通过与实测数据的对比发现，本文所计算出来的北麓河段冻土路基的形变在趋势上是正确的，说明采用永久散射体方法对高原冻土的形变进行研究是具有很大潜力的。

英文摘要：

The surface displacement by seasonally freezing bulge and thawing subsidence are main hazards for engineering construction in permafrost regions. One of the main problems is how to monitor the frozen ground＇s displacement in the process of construction and protection of the Qinghai-Tibetan railway. For detecting the subsidence of the frozen earth on Qinghai-Tibetan plateau, this paper improved the technology of Permanent Scatterers and used the method to analysis the deformation at Beiluhe. The results gotten from permanent scatterers method are in concordance with leveling. This proves that it is feasible to using permanent scatterers method to analyze deformation of the frozen earth on the Qinghai-Tibetan Plateau.