Usually, open excavation construction, maintenance, and restoration are adopted, resulting in high engineering costs and significant environmental impacts; Introducing advanced CCTV (Closed Circuit Television) pipeline endoscope detection technology can provide a more intuitive understanding of the internal status of underground drainage pipelines, avoid risks of personnel working underground, and reduce the impact on road traffic

Construction steps and precautions of pipeline closed circuit television detection method (CCTV detection system)

The basic steps of CCTV detection are as follows:

① We arrive at the site, collect data, and conduct on-site investigation ② Use the CCTV detection system to detect and collect image data, and then specify corresponding detection and repair plans ③ Based on the inspection results, summarize the data, issue a testing report, submit an evaluation report, and carry out pipeline repair construction

Precautions are as follows:

A. Data to be collected before pipeline inspection: ① pipeline plan, ② pipeline completion drawing, etc., ③ other inspection data of the pipeline.

③ verification of pipeline location, diameter, and pipe materials in the pipeline data C. Technical precautions before pipeline completion acceptance: ① The pipeline should be tested for tightness and test records of closed air or water should be presented. ② Before testing, it should be ensured that the accumulated water in the pipeline does not exceed 5% of the pipe diameter. ③ Before testing begins, dredging, cleaning, ventilation, and toxic and harmful gas testing must be carried out D. Precautions before pipeline repair and testing: ① The pipeline that needs to be tested should be flushed. ② Before testing, it should be ensured that the accumulated water in the pipeline cannot exceed 15% of the pipe diameter. ③

Before testing, for safety reasons, it is necessary to conduct experiments on dredging, cleaning, ventilation, and toxic and harmful gases