GPS在西安市地面沉降与地裂缝监测中的应用研究

GPS MONITORING AND SURVEYING ON LAND SUBSIDENCE AND LAND FISSURE IN XI′AN CITY

本文从GPS监测网的布网原则和设计方案出发,对GPS外业观测和内业数据处理中的关键技术进行了深入研究,提出了一套适用于大城市地面沉降与地裂缝灾害监测的作业方法和数据处理方案。通过西安地区地面沉降和地裂缝的GPS监测实践,证明了本文提出的监测网的布设原则、GPS外业施测和内业数据处理方案是切实可行的,并且通过GPS监测获取了西安地面沉降和地裂缝近期活动的有关数据信息,且其与精密水准结果具有很好的一致性。

Xi′an is one of the most serious areas of land subsidence and land fissure geology disaster in our country. I In order to monitor land subsidence and land fissure in Xi′an, a GPS reference network was established. The paper includes the fundamental of GPS reference network, observation outside and data processing, and recounts some key technology. It is verified by practical example in this paper that the height measuring precision was achieved when the urban land subsidence was monitored using GPS surveying. The precision of GPS surveying can satisfy the requirement of the urban land subsidence and land fissure. Result of monitoring has a good coherence with precise leveling.