城市大直径管道多维联合检测方法研究

探明地下污水管线运营的实际情况是后期维护的重要依据，而目前的探测方法不能全面掌握地下管线的精确探测问题。针对郑州地铁下穿污水管的运营情况，采用高密度电法、地质雷达检测技术，结合自行研发的浮于水面的彩色成像系统探测技术对其进行了间接探测和直观探测，找到了污水管渗漏、空洞及错位等问题，实现了对管道的多维立体监测，为地下管线的保护、修复和加固提供了技术支撑。

Research on Multi-dimensional Joint Detection Method of Large-diameter Urban Pipelines

Finding out the actual operation of underground sewage pipeline is an important basis for later maintenance. However, the current detection method cannot fully grasp the accurate detection of underground pipelines. Aiming at the operation of Zhengzhou subway crossing beneath the sewage pipeline, the sewage pipeline is indirectly and intuitively detected by using the high-density electrical method and ground penetrating radar detection method, and combined with the self-developed detection technology of color imaging system floating on the water surface. The problems of leakage, cavity and dislocation of the sewage pipeline are found, and the multi-dimensional and three-dimensional monitoring of the pipeline is realized, which provides the technical support for the protection, repair and reinforcement of the underground pipeline.