Effectively ensuring the quality of regional water environment! The renovation project of the South Main Line in Shanghai has passed the completion acceptance inspection
The reporter learned from Shanghai Urban Investment that recently, the NGX1.1 section of the South Main Line renovation project, which was constructed by Shanghai Urban Drainage Co., Ltd., has passed the completion acceptance, marking the full connection and acceptance of the renovated South District sewage transportation main line. The system's clean water debugging has been completed, and it is planned to connect sewage in September. The completion of this project will further improve the backbone network of urban sewage transportation, enhance the safety of trunk line operation, and effectively guarantee the quality of regional water environment.
The sewage transportation trunk line in the southern district of Shanghai is the first sewage transportation trunk line constructed in the central urban area of Shanghai. It was completed and opened to water in 1972, with a designed flow rate of about 400000 cubic meters/day and a total length of about 32.2 kilometers. There are a total of 6 pumping stations along the line, and it is an important component of the "three lines" in the layout of sewage treatment facilities in the Bailonggang area. Its service scope covers the central areas of Xuhui, Huangpu, and Pudong, mainly serving 16 sewage branch lines.
The South Main Line has been in operation for over 50 years now, and there are hidden dangers of pollution and structural safety. The South Main Line renovation project, which started in 2020, has a design scale of 500000 cubic meters per day with a planned sewage volume. The main engineering quantities include repairing the existing box culvert with a length of about 2.25 kilometers, constructing a new main pipeline with a length of about 20 kilometers and a diameter of 2.7 meters to 3.5 meters, and renovating the South Main Line 1 and 3 pump stations, constructing the South Main Line 4 and 5 pump stations, and constructing several ventilation wells, gate wells, valve wells, etc. along the line.
The South Trunk Line Renovation Project is based on the construction concept of "revitalizing the pipeline, activating urban water power; leading with craftsmanship, and upgrading the water environment on both sides". Shanghai Urban Drainage Co., Ltd., in accordance with the goal of "keeping major nodes unchanged and completing investments unchanged" for major projects in the city, will leverage its business and technical capabilities, strengthen work coordination, and ensure the quality of the project under the condition that the lives of residents and important urban facilities in multiple towns along the line cannot be affected.
![Effectively ensuring the quality of regional water environment! The renovation project of the South Main Line in Shanghai has passed the completion acceptance inspection](https://a5qu.com/upload/images/7a727b73cdfd978790530fab7084b9d2.jpg)
Each participating unit strives for excellence and innovation, actively carrying out work such as safety first, quality first, and technological innovation. BIM technology is applied to the entire lifecycle management of the South Main Line renovation project, proposing key points for site model creation, site design, and layout, as well as technical and safety requirements in site layout. Promote the entry of VR intelligent security experience halls into construction sites, and use 3D simulation technology to provide virtual experiences more directly for builders, enhancing safety awareness. And for the first time in the Shanghai area, HDPE lined anti-corrosion reinforced concrete composite pipes were adopted, directly applied to large-diameter sewage jacking pipes, solving the world-class problem of sewage pipeline anti-corrosion. Part of the section pipelines of the South Main Line renovation project have crossed the rail transit lines 2, 16, maglev elevated sections, etc. Multiple measures have been taken during construction to ensure that the shield tunneling passes through the rail transit lines smoothly and safely.
This renovation ensures the safety of the original South Main Line sewage transportation, eliminates the current structural safety hazards, and builds an important part of the urban ecological security barrier, effectively enhancing the safety resilience of the city, becoming an important support for improving the urban level and core competitiveness of Shanghai's water environment.
Text: Li Jicheng
*Reprinted from official WeChat account released by Pudong
![Effectively ensuring the quality of regional water environment! The renovation project of the South Main Line in Shanghai has passed the completion acceptance inspection](https://a5qu.com/upload/images/cded193bfd364fe8779885d4944217e9.jpg)