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中文摘要：
为提高隧道检测中探地雷达图像解释的准确性,提供典型图像的探地雷达解释模板,文章以探地雷达理论为基础,运用时域有限差分法,对隧道检测中常见的钢筋、钢拱架、格栅拱架、脱空、空洞、不密实等典型目标体进行了探地雷达二维正演模拟,并结合实测雷达图像进行了对比分析,总结了典型目标体雷达图像特征。模拟和实测结果表明,探地雷达可以探测隧道钢筋、钢拱架、脱空、空洞和不密实区。各目标体的图像特征可对以后雷达图像解释提供指导和参考。
英文摘要：
To improve precision of the interpretation of Ground Penetrating Radar（GPR） images during tunnel in-spection and provide interpretation templates for typical images, a 2D forward simulation was carried out regardingsuch typical detection targets as the tunnel＇s reinforcement, steel arch, lattice girder, rock disengagement, cavities,and uncompacted areas based on GPR theory and the finite difference time domain method. The features of the GPRimages of these targets are summarized by comparing the simulated results with the measured ones. The results showthat the ground penetrating radar can be used to detect reinforcement, steel arches, rock disengagements, cavitiesand uncompacted areas within tunnels, and the resulting images can be used to provide guidance and reference forlater interpretation.
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