The South-North China Water Diversion Project is a key strategic project to alleviate severe water scarcity in the north of the country, especially in the capital of Beijing.
Following the depletion of groundwater reserves, China’s capital is increasingly dependent on water pumped from the flood-prone southern part of the country.
The Beijing Water Institute was commissioned with this CNY 3.4 billion project to support the creation of construction plans for multiple pumping stations, water transmission lines, and water treatment plants.
Beijing’s 21 million people are running out of water. Heavy dependence on groundwater is depleting aquifers and causing the land to sink. An ambitious south-north water diversion project is unlikely to provide enough water for Beijing in the long term. In addition, nearly 40 percent of Beijing’s surface waters are too polluted for use.
Leveraging BIM methodologies to manage design and information management, the entire system was designed using Bentley’s 3D modeling and ProjectWise as the central collaborative environment.
Descartes software was used to create digital surface engineering models and construction models, allowing the team to track construction completion digitally, rather than relying on paper queries for information.
The Bentley HAMMER was used to analyze and calculate the hydraulic transition between pumping stations and to calculate the distribution of pressure along the path in the event of pump shutdown, ensuring that the system can operate safely under all circumstances.
Three-dimensional geological models of the entire site were performed using MicroStation, reducing modeling times by 60% compared to previous 2D methodologies. This process also allowed the creation of a complex pipeline model that allowed the shortest directions to be calculated to optimize the design and protection of several of them. This innovative approach saved 80% in design time compared to previous 2D methods.
Based on this intelligent water design, the project has been developed under a solid technical base that supports the operation of the project by taking advantage of collaborative 3D design results, creating information files of reliable models and the possibility for the project to fully perform digital design, digital construction management, and digital operations.
Xin Yin, the project’s chief engineer, said: “This project is not only an example of 3D application in water supply engineering for a long-distance urban tunnel but is also a successful 3D practice in design, construction, and management.
“Taking this project as a symbol, we will lead 3D design trends in long-distance water transmission piping engineering, marking the beginning of a new era in the industry in which collaborative 3D design is applied to the field of water conservation design.”