By analyzing the different distributions of the rail voltage and the stay current in condition of using drainage arrangement and without using drainage arrangement with analytical method . the author presents a new design principle for the artifical drainage arrangement and designs a new intellectual drainage arrangement 摘要利用解析法分析了地铁轨道电位和腐蚀电流在有排流和没有排流情况下的分布情况，提出设计新型排流装置的原则，并设计了实用新型的智能排流装置。
