Abstract: Leakage is one of the main hidden hazards to the safety of hydraulic structures. To deal with leakage problems economically and efficiently, it is necessary to identify leakage channels first. There are many methods for leakage detection at home and abroad, such as ground penetrating radar, DC resistivity method and flow field method. In this paper, aiming at the leakage problem of a power station in Hunan province, combination of composite profiling method and pseudo-random flow field method is adopted for leakage detection and Variational inequality of Signorini type solution analysis. By this way, the leakage path is found accurately, laying a solid foundation for efficient leakage treatment.

Key words: levee leakage, combined section method, pseudo-random flow field method, variational inequality of Signorini type

摘要： 渗漏是威胁水工建筑物安全的主要隐患之一，如不及时治理，将可能会引起重大安全问题。为了经济高效地治理渗漏问题，必须先查明渗漏通道。现国内外渗漏探测的方法有很多，如探地雷达法、直流电阻率法、流场法等[1]。结合湖南某电站堤防渗漏问题，综合采用联合剖面法和伪随机流场法开展渗漏探测与Signorini型变分不等式求解分析，准确锁定渗漏位置，为经济高效的渗漏治理打下良好基础。

关键词: 堤防渗漏, 联合剖面法, 伪随机流场法, Signorini型变分不等式