茜坑水库主坝表面GNSS变形监测系统设计与实现

Design and implementation of GNSS dam surface deformation monitoring system for Xikeng Reservoir

安全监测是保障水库大坝安全的重要措施,表面变形监测是其中一项重要内容。传统的水准仪、全站仪人工变形观测手段监测效率低,无法实时连续、全天候观测。以北斗、GPS为代表的GNSS变形监测技术,具有实时连续、全天候、自动化监测的优点。介绍了茜坑水库主坝表面GNSS自动化变形监测系统的集成方案,分析了运行期间监测数据的精度和可靠性,验证了系统具备毫米级精度变形监测能力。系统的成功建设表明,GNSS技术能很好满足土石坝监测的应用需求,对加强水库抵抗恶劣天气能力、提升水库信息化管理水平具有重要意义,未来在变形监测领域应用前景广阔。

Safety monitoring is an important measure for ensuring reservoir dam safety,in which surface deformation monitoring plays an important role. The traditional artificial deformation monitoring means by level instruments or total station have limitations in monitoring efficiency,continuous real-time and all-weather monitoring. GNSS deformation monitoring technology represented by Beidou satellite and GPS can overcome these limitations. This paper introduces the integrated solution of GNSS automatic dam surface deformation monitoring system,analyzes the accuracy and reliability of monitoring data. The analysis shows that the system monitoring accuracy can reach millimeter-scale and GNSS technology can fulfill the application requirement of earth-rock dam monitoring. The system has a significant meaning in improving the reservoir capacity against adverse weather and the reservoir＇s informatization management level,having broad application prospects in deformation monitoring in the future.