Evaluation of Drainage Pipeline Defects in Tianjin Binhai Area
In order to solve pipeline defects,in this paper,a pipeline of Binhai New District is tested by using the tech-nology of pipeline periscope and closed circuit television sysyterm(CCTV).It identifies common defects ind-rainage pipelines in high-water areas of Binhai based on different materials,traces the potential causes of pipeline defects.