Abstract: Underground pipelines are complex in cities. Some pipelines are difficult to detect because they are old, deeply embedded, non-metallic and of small diameter, which leads to damage of under. ground pipelines from construction. Ground penetrating radar (GPR) is an effective geophysical method to detect underground pipelines. This paper introduces the basic principles of GPR and briefly analyzes the key technology of GPR. Combined with two engineering cases, the application of GPR to under. ground pipeline detection is analyzed. The application results show that the GPR is effective in detecting both metal and non-metallic underground pipelines, and it is of significance for geological survey and engineering construction.

Key words: detection of underground pipeline, ground penetrating radar (GPR), geophysical detection

摘要： 城市地下管线错综复杂，部分管线由于年代久远、埋深大、非金属材质及小管径等特征，难以探测，导致施工破坏地下管线的事故时有发生。探地雷达是探测地下疑难管线有效的地球物理探测方法之一。笔者介绍了探地雷达工作的基本原理，对探地雷达关键技术进行了简要分析，通过两个工程实例分析了探地雷达在地下管线探测工程中的应用。工程应用结果表明，探地雷达对于地下金属或非金属管线的探测效果明显，其对管线的定位和定深在地质勘察、工程施工中具有指导意义，为保障城市地下管线安全起到了积极作用。

关键词: 地下管线探测, 探地雷达, 地球物理探测