? ? ? ?The full length of the DN1200 raw water pipeline relocation project of Fengchan Road is 1,300.5 meters. At present, the installation and backfilling of the pipeline with pile number k 0 + 015-k 1 + 278 have been completed, totaling 1,263 meters, and there is no other working face at present, follow-up work to wait for the completion of the water cut-off procedures after approval. During this period, Zhou Wujun, the project leader, and the production and Operation Department to communicate and negotiate constantly to determine the water cut-off time and plan. On March 20,2020, the vice president of Water Supply Company came to the DN1200 raw water pipeline relocation project construction site, the actual progress of the site, construction technology inspection and guidance.

? ? ? ?In view of the actual progress of the construction site, construction technology and water cut-off connection scheme, the leadership made a detailed understanding under the introduction of the high-yield road project leader. After the completion of site investigation, the time of water cut-off was confirmed, and the project manager immediately informed the site staff to prepare for the construction to ensure that the construction work was carried out in an orderly manner. After receiving the notice, the site staff immediately organized for pre-work, first of all, manual flushing of the pipeline. In order to shorten the water cut-off time as much as possible, the project department organized the construction personnel to dig out the top part of the old raw water pipeline ahead of time. Remove the screws of the bearing plate with the block plate in advance, install the bearing plate and steel special parts. March 22 at 10:00, the formal start of the water cut-off, my unit with the fifth water plant to close the valve, and open the sludge discharge, pressure and drainage. Because the pipeline distance is too long, the sludge can not be a short period of time, all the water inside the pipeline discharge. The project department arranges the construction personnel to manually break the large end of the cement pipe to ensure the integrity of the pipe at the west connection point. When there is no water in the breaking point of the mud discharge and old waste water pipeline, the project personnel begin to arrange to break the pipeline at the East Connection, and the water is pumped out from the east working pit. Under the leadership of the leadership of the second company, under the overnight struggle of all the management and construction personnel, after 43 hours, Fengchan Road DN1200 raw water pipeline relocation project, in advance of the scheduled time to complete the new laying of pipelines and old raw water pipeline connection work, we will continue to be full of enthusiasm, speed up progress, quality, safety, ensure that DN1200 high-yield road raw water pipeline relocation project can be completed on schedule, quality and quantity.