伪随机流场法在堤坝渗漏探测中的应用与研究

发布时间：2018-05-01 05:33

本文选题：伪随机流场法 + 堤坝渗流　；参考：《水利水电技术》2017年09期

【摘要】：伪随机流场法具有快捷、直接、精确有效等优点,逐步成为堤坝渗漏探测的主流方法。利用该方法,在漏水区域、库区无穷远段进行高压供电,库区内网格状布置测点,可查找渗漏入水点。通过对各异常区域的区域面积、异常区域内各测点的异常平均值以及对于严重渗漏的临界值进行计算,可判断水库渗漏通道和各渗漏点的渗漏量比例。此外,由于该方法快速便捷的特点,可以运用该方法进行实时监测。应用于某混凝土面板堆石坝的探测结果表明,利用堤坝周边已经存在的监测孔或在灌浆帷幕下游进行钻孔,进行伪随机电位差或者电流测试,可在无损条件下判断渗漏来源和通道发育方向,检测防渗处理效果。该方法可为堤坝渗漏监测预警、拟定防渗处理方案提供依据。
[Abstract]:Pseudorandom flow field method has the advantages of rapidity, directness, accuracy and efficiency, and has gradually become the mainstream method for dam leakage detection. By using this method, the high voltage power supply is carried out in the infinite section of the reservoir area in the leakage area, and the measuring points are arranged in the reservoir area in a grid form, which can be used to find the leakage points. By calculating the area of each abnormal area, the abnormal average value of each measuring point and the critical value of serious leakage, the leakage ratio of reservoir leakage channel and each leakage point can be determined. In addition, the method can be used for real-time monitoring because of its fast and convenient characteristics. The detection results applied to a concrete face rockfill dam show that the pseudo-random potential difference or electric current is measured by using the existing monitoring holes around the dam or drilling holes downstream of the grouting curtain. The source of leakage and the developing direction of channel can be judged under the condition of non-damage, and the effect of anti-seepage treatment can be detected. This method can provide basis for seepage monitoring and early warning of dike and drawing up anti-seepage treatment scheme.
【作者单位】：四川中水成勘院工程物探检测有限公司;
【分类号】：TV698.12;TV871

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