Abstract: The underground pipeline is the lifeline of city. Detecting and surveying of the underground pipelines are basic work for urban planning, construction and management. It's prerequisite to understand the distribution of underground pipelines in the construction area for ensuring the safety of pipelines. Currently, DC electrical method, electromagnetic induction and ground penetrating radar are most widely used in engineering projects. Combined with engineering projects, the principles and characteristics of the three major methods are introduced and analysised. The problems and development trends of pipeline detection technology are summarized.

Key words: underground pipeline, geophysical exploration, DC electrical method, electromagnetic induction, ground penetrating radar

摘要： 地下管线是城市的“生命线”，地下管线探查和测绘是城市规划建设和管理的重要基础性工作，掌握施工区地下管线的分布是确保地下管线安全的前提。目前，地下管线探测的主要物探方法包括直流电法（充电法、高密度电法等）、电磁法（电磁感应法、地质雷达法等）、磁梯度法、地震波映像法等。实际工程中应用最广泛的为直
流电法、电磁感应法以及地质雷达法。主要介绍了三种探测方法的基本原理和特点，并结合工程实例进行应用分析，最后对当前管线探测技术存在的问题和发展趋势进行总结和展望。

关键词: 地下管线, 地球物理探测, 直流电法, 电磁感应, 地质雷达