为了研究监测西安地区地面沉降与地裂缝灾害的变化情况,建立了该地区高精度GPS监测网。着重介绍了该GPS监测网设计方案和外业观测方法,并对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,验证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,获得了与精密水准结果与地质资料具有较好一致性的结果。
In order to monitor land subsidence and land fissure in Xi'an, a high precision GPS refer- ence network was established. This paper includes the fundamental of GPS reference network, observation outside and data processing, and recounts some key technology. Though the practice, it's proved that which have mentioned above are feasible. Information about the activity of land subsidence and land fissure is obtained by GPS monitor, and the result has a good coherence with precise leveling.