拉西瓦水电站高边坡危岩体安全监测

Dam Safety Monitoring for Dangerous Rock Mass on High Slope of Laxiwa Hydropower Station and Its Observational Data Analysis

探讨了光学测量法、全球定位系统法和电测法3种边坡常规监测方法,指出了其优、缺点。针对拉西瓦水电站高边坡危岩体现场实际情况,结合监测设计原则,选取电测法中的测缝及测斜对其稳定性进行监测,确立了仪器布置方案及自动化系统实施监测网络结构。该方案自2008年实施至今,系统运行稳定,监测数据准确、可靠,为拉西瓦水电站安全施工及监测分析提供了资料。

Three methods such as optical measurement,GPS measurement and electrical measurement used for conventional slope safety monitoring are explored in the paper.Also,the advantages and disadvantages among these methods are pointed out.The operating principles of each method are explained in detail,too.Considering the practical situation of dangerous rock mass on high slope in the Laxiwa Hydropower Station and the design principle of safety monitoring,the electrical measurement method with crack sensors and inclination sensors is adopted for the stability monitoring of dangerous rock mass.The optimal sensor arrangement scheme and the network topology of automation monitoring system are established as well.The system has been operated stably since it was installed in 2008.The accurate and reliable data obtained by this monitoring system provides valuable information for safety construction and slope condition assessment of Laxiwa Hydropower Station.