Water & Wastewater Asia Jan/Feb 2019

Water & Wastewater Asia • January / February 2019 TECH ROUND UP | 13 South-to-North Water Diversion initiative to optimise the allocation of water resources in northern China. It is a major foundational strategic project to alleviate the severe shortage of water resources in northern China, especially in the capital of Beijing; to optimise the allocation of water resources; and to support the development of Beijing and Tianjin. With three pumping stations, water transmission lines totalling 18.8 kilometres in length, and five water outlets, the project required large-scale terrain modelling and analysis, and simulation of pumping station operations. And so, the Beijing Institute of Water was tasked with this CNY 3.4 billion project to support the Hexi Branch sub-project in creating construction drawings of multiple pumping stations, water transmission lines, and water treatment plants. USING BENTLEY SYSTEMS’ BIM METHODOLOGIES Due to environmental, sustainable and development restrictions in Beijing, the Beijing Institute of Water needed to look for products that are able to help them to achieve strong results while fulfilling the requirements, explained Yin Xin, chief engineer of the Information Center of Beijing Institute of Water. Hence, they turned to Bentley Systems after conducting more than a decade of research into the different companies. By leveraging on Bentley Systems’ BIM methodologies to manage the design and information management, the entire systemwas designed using 3D modelling and Bentley’s Connected Data Environment based on ProjectWise for file sharing and coordinated design, streamlining workflows and improving efficiency. From these design models, construction drawings and secondary design analyses were conducted using MicroStation for annotation and rebar assessment, greatly improving the efficiency of creating detailed drawings. In addition, the project team used Descartes to create surface digital engineering models and building models, allowing the team to track construction completion digitally, rather than relying on paper queries for information, so as to accelerate design planning through accurate visual displays. In addition, Bentley’s HAMMER was used to analyse and calculate the hydraulic transition between the pumping stations and to calculate pressure distribution along the path in case of pump shutdown, ensuring that the system can operate safely under any circumstance. Three-dimensional geological models of the entire site using MicroStation resulted in 60 per cent faster modelling times compared to previous 2D methodologies. This process also enabled the direct creation of a complex pipeline mesh model to calculate the shortest clear directions to optimise the design and protection of various pipelines. “By using this approach, it helps to save time and is accurate. Just like that we saved about 80 per cent in design time as compared to previous 2D methods,” said Xin. WHAT’S NEXT? By combining full lifecycle management concepts, the Hexi branch project carried out design work of intelligent water in the initial design phase. From this intelligent water design, the project developed a strong technical basis to support operation of the project through leveraging 3D collaborative design results, building reliable model information archives and enabling the project to fully realise digital design, digital construction management, and digital operations. From left: Yin Xin, Chief Engineer, Information Center, Beijing Institute of Water; and Wang Lei, Vice Chief Engineer, Beijing Institute of Water One of the finalists for this year’s Year in Infrastructure Conference in the Water, Wastewater and Stormwater Networks category is the Beijing Institute of Water with its Beijing South-to-North Water Diversion Auxiliary Project: Hexi Branch Project in Beijing, China. Photo credit: Bentley Systems Xin said, “This project is not only an example of 3D application in water supply engineering for an urban long-distance tunnel, but it 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, super- large-pipe water transmission engineering, ushering in a new era in the industry in which 3D collaborative design is widely applied to the field of water conservancy design.” WWA