关键词: 时移探测, 堤防隐患, 高密度电法, 长江干堤

Abstract: For the low detectability and the time-varying property of dike hidden troubles in flood season, this paper summarizes the current situations and characteristics of the dike hidden troubles detection technologies and instruments, points out the present problems in the dike hidden troubles detection and then puts forward the detection idea from hidden danger detection to dynamic time shift, continuous and information detection. Using time-shift high-density electrical detection as an example, we study the spatial observation system arrangement through the layout of measuring line, point distance and parameters. What’s more, we also study multi-channel intelligent data acquisition mode, data remote transmission and monitoring, GPU parallel time-shift inversion imaging method and so on. Time-shift high-density electrical detection is proven to be effective and feasible by a dike detection example. After this, it is hoped to realize time-dynamic tracing, analyzing and prewarning from geological defect locating to disaster forming.

Key words: high-density electrical detection, time-shift detection, hidden danger in dike, Yangtze River main embankment