Abstract:In order to better understand the engineering experience of drainage pipe network inspection and repair under the background of urban renewal, taking an urban drainage pipe network inspection and repair project in East China as an example, the common issues during CCTV inspection of drainage pipe network are summarized and the corresponding solutions are proposed. The types of pipeline defects in Area A of the city are categorized and statistically analyzed. At the same time, the targeted repair measures are given. The results indicate that the proportion of structural defects such as pipeline deformation and internal obstacles caused by functional defects is relatively high, significantly impacting the structural stability and water conveyance capacity of drainage pipelines. It is necessary to timely conduct the repair and maintenance, ensuring the safe and stable operation of the pipeline network system. These findings provide practical references and technical guidance for inspection and repair engineering of urban drainage pipe network.