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| 天然电场选频法探测堤坝管涌隐患试验研究 |
| Experimental study on detection of hidden dangers of dike pipe surge by the frequency selection method of telluric field |
| 投稿时间：2023-07-22 修订日期：2023-07-22 |
| DOI： |
| 中文关键词: 物探；堤坝管涌；天然电场选频法；电磁场 |
| 英文关键词: Geophysical; dike pipe surge; field frequency selection method; electromagnetic field |
| 基金项目: |
| 作者 | 单位 | 邮编 | | 周佳奇 | 湖南普奇地质勘探设备研究院 | 2550696044@qq.com | | 杨追 | 湖南普奇地质勘探设备研究院 | 410000 |
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| 中文摘要: |
| 天然电场选频法是以大地天然电磁场作为工作场源的一种物探方法，本文主要是在已知区试验验证该方法探测堤坝管涌隐患的有效性。作者采用三频法（即170 Hz、67 Hz和25 Hz）进行试验测试，布置L1、L2测线，之后在L2测线异常区段进行两极剖面分析。在不考虑日变情况的影响下，结果显示，L1测线的地下由于存在输电设施的严重干扰，测试结果严重畸变；L2测线上的低电位异常与已知的堤防管涌渗漏点对应，说明天然电场选频法探测堤坝管涌渗漏是行之有效的。 |
| 英文摘要: |
| The frequency selection method of telluric field is a geophysical method using the natural electromagnetic field of the earth as the working field source, and this paper mainly verifies the effectiveness of the method in detecting the hidden dangers of dam pipe surge in the known area. The authors used the three-frequency method (i.e., 170 Hz, 67 Hz and 25 Hz) to conduct experimental tests, arrange L1 and L2 lines, and then perform polar profile analysis in the abnormal section of L2 line. Without considering the influence of daily change, the results show that the underground of the L1 measurement line is seriously distorted due to the serious interference of transmission facilities. The low potential anomaly on the L2 measurement line corresponds to the known leakage point of dike pipe surge, indicating that the frequency selection method of telluric field is effective in detecting dike pipe surge leakage. |
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