探地雷达对非金属管线有效探测深度的研究

Research on effective detection depth of non-metallic pipelines by ground-penetrating radar

为优化城市生态,加强水环境治理,全国各地近年来全面展开“正本清源”等管线普查工作,而探地雷达因无损、便捷、直观等特点在管线探测领域得到了广泛应用,但探地雷达对非金属管线的有效探测深度一直难以界定。为提高探地雷达对非金属管线探测的效率和准确度,利用电磁波模拟软件GPRMax3.0,以1∶10的经验径深比为基准设计正演模型,采用不同频率的天线对不同条件下的非金属管线进行正演探测模拟。通过模拟与实际探测结果的相互验证,总结了100 M、270 M和400 M天线对于非金属管线的有效测深范围。实验结果可对探地雷达在城市地下非金属管线探测起到一定的参考意义。

In order to improve the efficiency and accuracy of ground-penetrating radar for non-metallic pipeline detection,this paper uses the electromagnetic wave simulation software GPRMax3.0 to design the orthorectified model based on the empirical diameter-to-depth ratio of 1∶10 and applies different frequency antennas to carry out orthorectified detection simulation of non-metallic pipelines under different conditions.The effective bathymetric range of 100 M,270 M,and 400 M antennas for non-metallic pipelines is summarized through the mutual simulation verification and actual detection results.This paper's experimental results can play aspecific reference significance for ground-penetrating radar in urban underground non-metallic pipeline detection.