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 an important infrastructure of the city. Underground pipeline exploration is of great significance to the normal operation of the city and its reconstruction and expansion. According to the finite difference time domain method, the generalized perfectly matching layer (GPML) is used as the absorption boundary to conduct two-dimensional forward modeling of underground pipelines with different water content. Combined with the actual physical model, radar image features of underground pipelines with different water contents are summarized And its laws, provide the necessary theoretical basis for GPR exploration of underground pipelines.