探地雷达在含水地下管线探测中的研究

Study on underground water filling pipeline detection by ground penetrating radar

地下管线是城市的重要基础设施,地下管线探测对城市的正常运营及改造扩建具有十分重要的意义。根据时域有限差分法,采用广义完全匹配层(GPML)作为吸收边界,对不同含水量的地下管线进行二维正演,结合实际物理模型探测,总结出不同含水量的地下管线的雷达图像特征及其规律,为探地雷达探测地下管线提供必要的理论依据。

Underground pipeline is very important as an infrastructure of a city.The pipeline detection is important to the daily operation and the expansion of urban.Based on the finite difference time domain methods（FDTD）,adopted the generalized completely matched layer（GPML） as absorbing boundary,an two-dimensional forward modeling is performed on the underground pipeline with different water content.Combined with physical model detection,the characteristics and rules of radar image of different water containing pipelines are summarized.The method could provide an essential theoretical basis for the underground pipeline detection.