一、引言探地雷达(简称GPR)是对使用无线电波技术的统称,较典型的为1-1000MHz频率范围,用于圈定地下(或人工建造)的构造和特征。历史上,GPR主要集中于勘查地下构造,最近GPR开始用于非金属结构的无损测试。应用无线电波探查地下内部构造的概念并不新鲜。然而,成功地应用这种方法还仍处于初期阶段。无疑地,在这一领域内最成功的早期工作是使用无线电回声探 I. INTRODUCTION Ground penetrating radar (referred to as GPR) is a general term for the use of radiowave technology, typically ranging from 1 to 1000 MHz, to delineate the structure and features of the ground (or man-made). Historically, GPRs have focused mainly on the exploration of subsurface structures and recently GPRs have been used for non-destructive testing of non-metallic structures. The concept of using radio waves to probe underground substructures is not new. However, the successful application of this method is still in its infancy. Undoubtedly, the most successful early work in this area was the use of radio echo sounding