流场拟合法在堤坝渗漏管涌探测中的应用

Application of flow field fitting method in seepage and piping detection of embankments

水灾发生较频繁,危害极大。由渗漏发展形成管涌,往往导致堤垸溃决,造成不可估量的损失。流场拟合法作为一种特别适合汛期探查堤坝渗漏管涌等险情隐患的物理探测高新技术,其基本原理是用电流场比拟水流场,通过测量电流场的分布来确定堤坝管涌渗漏所产生的微弱水流场,进而确定渗漏入水口。用此方法在近几年的防汛抗洪中,在数十个堤段,查找出上百个渗漏管涌入水口,为护堤堵漏防止溃决提供了科学的依据。

The leakage in dykes can develop into piping which may lead to dyke failure and may cause inestimable loss to the people. The flow field fitting method serves as a new physical prospecting technology, especially suitable for detecting hidden dangers of leakage and piping in dykes and dams during flood seasons. The basic principle of this method is to create an electric current field to simulate a water flow field, surveying the distribution of the electric current field to determine the weak flow field resulting from leakage and piping in dykes and dams, so as to determine the inlets of leakage. This method was successfully applied in the past few years to have detected more than 100 inlets of leakage and piping in dozens of dyke sections, providing scientific basis for dyke protection, leakage stoppage and dyke failure prevention.