分布式光纤监测系统在混凝土坝的研究与应用

Research in and Application of Distributed Optical Fiber Monitoring System at Concrete Dam

传统大坝坝体温度测量一般使用电类温度传感器,存在信息量少,难掌握坝体内部温度场的变化等问题。为此,研究和论证适合测温的分布式光纤传感技术,并根据碾压混凝土坝温控监测的常用方法,结合先进的分布式光纤传感技术在乐昌峡水利枢纽工程的应用,通过与常规温度监测系统热电偶的对比,着重讨论了分布式光纤测温系统在碾压混凝土大坝温度测量中的可行性和先进性,同时展望分布式光纤温度监测技术在安全监测其他领域的应用前景。

Electric temperature sensor is used for traditional temperature measurement of dam body,but there are problems of small information content and difficulity in monitoring temperature field variation of internal dam body.Therefore,a research was made on applying distributed optical fiber sensing technique for temperature measurement.According to ordinary temperature monitoring methods,and with consideration on application of the technique in Lechang gorge hydro-junction project,through comparision with ordinary temperature monitoring system,the article mainly discusses feasibility and advancement of using distributed optical fiber temperature measurement system for roller compacted concrete dam.At the same time,the author makes a prospect for the technique in other safety monitoring fields.