Wuhan Outer Ring Expansion Project, Construction of Supply and Drainage Pipe Supporting Ring Pipe Network

The Wuhan Outer Ring Expansion Project is a core project for the upgrade of urban transportation hubs. The construction quality of its supporting water supply and drainage ring pipe network is directly related to the people's livelihood security and regional development after the operation of the outer ring. In the early stage of construction, it is necessary to complete accurate surveys based on the topography, geomorphology and hydrogeological conditions of the ring line, clarify the direction and laying depth of the pipe network, and provide a basis for the selection of plastic pipes. Considering the pressure bearing, corrosion resistance and construction convenience of the ring pipe network, suitable plastic pipes are preferred. This kind of pipes have the characteristics of light weight, reliable connection and long service life, which meet the construction rhythm and long-term operation needs of the ring line project. During the construction stage, strictly follow the slotting specifications to control the slope of the groove wall and the flatness of the base, ensure that the pipe interface is aligned during laying, and adopt standardized connection technology to ensure the sealing performance and avoid hidden dangers of leakage. After the laying is completed, the closed water test needs to be carried out in time to detect the sealing and pressure-bearing capacity of the pipe network. After passing, the layered backfill can be carried out. During the backfill process, the particle size and compaction degree of the filler are strictly controlled to prevent the pipe from being compressed and deformed. Quality control is implemented throughout the process, and each process is recorded synchronously to ensure that the pipe network system can adapt to the traffic flow, people flow and the water supply and drainage needs of the surrounding areas after the expansion of Wuhan's outer ring, laying a solid foundation for the overall delivery of the project