Dyke Seepage Monitoring Based On Distributed Optical Fiber Sensing Technology

Distributed optical fiber sensing technology is a new technology developed rapidly in the field of dam safety monitoring in recent years,It is widely used in water conservancy and hydropower field with its water resistance,corrosion resistance,high sensitivity,distributed sensing and many other features.In this thesis,the dyke project of the main stream of Songhua River is taken as the object of study,the shortcomings of the point type electrical measurement technique used in the monitoring of typical sections of conventional breaking methods,the application of distributed optical fiber sensing technology innovation to continuous monitoring in levee engineering piping,leakage and other dangers,it laid a foundation for the long term safety monitoring of the dike project along the main stream of Songhua River,at the same time,it also fills the gap of domestic and foreign technical research under the special environment conditions such as hydrology,meteorology and geology,it is of great practical significance and scientific and technological value.In view of the existing Dike Seepage Monitoring method,it is difficult to monitor the problem continuously and effectively,based on the theory of distributed optical fiber temperature measurement,combined with the actual situation of Songhua River main dike.Firstly,the distributed optical fiber embankment temperature measurement experiment is modeled,The objective,device model and experimental procedure of indoor experiment are put forward,The feasibility of using distributed optical fiber to monitor leakage is proved by the analysis of experimental results.Secondly,the distributed optical fiber temperature monitoring is carried out in the test section of the main dike of Songhua River,the layout scheme of distributed optical fiber and temperature sensor is put forward,provides information on the fiber laying position,methods and precautions of the proposal and the collected temperature data are analyzed.Finally,according to the experimental data,the automatic monitoring platform for leakage of Songhua River main dyke is developed.