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Costain, VINCI, Bachy JV Industrializes Delivery of UK’s Largest Water Infrastructure Project

Costain, VINCI, Bachy JV Industrializes Delivery of UK’s Largest Water Infrastructure Project
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Costain, VINCI, Bachy JV Industrializes Delivery of UK’s Largest Water Infrastructure Project - 1

CASE STUDY Bentley Advancing Infrastructure Project Summary Organization: CVB JV (Costain, VINCI Construction Grands Projets and Bachy Soletanche Joint Venture) Costain, VINCI, Bachy JV Industrializes Delivery of UK's Largest Water Infrastructure Project Solution: 4D Construction Modeling Leveraging SYNCHRO™ 4D Saves 90 Days During Two Years of Construction Location: London, United Kingdom Project Objective: • To push the boundaries of conventional construction methodologies, safely deliver a sustainable sewer system, and prevent pollution of the River Thames. • To implement 4D construction modeling to streamline workflows, improve understanding, and optimize decision-making. Project Playbook: OpenBuildings™ Designer, ProjectWise®, SYNCHRO 4D Fast Facts • CVB JV established a connected data environment and implemented 4D construction modeling for the GBP 850 million Thames Tideway East Tunnel. • SYNCHRO 4D helped create more than 30 digital 4D construction models at five sites, streamlining construction planning activities and improving progress tracking and management. • The team facilitated 4D collaborative planning to optimize on-site construction works. ROI • Using 4D modeling reduced the overall construction program by over 90 days over two years, saving GBP 1 million. • Through 4D collaborative planning and digital workflows, CVB JV optimized constructability, avoiding night work while reducing the construction program by 50%. • CVB JV is piloting SYNCHRO 4D during the remainder of this "super-sewer” project, expected to reduce manual work by 50% at each construction site. Reconnecting London with the River Thames Originally built in 1858, London's 150-year-old sewer system lacks the capacity to meet modern demands of the city's growing population, resulting in millions of tons of raw, untreated sewage spilling into the River Thames each year. To accommodate the current 8.8 million Londoners and expected continued growth, Tideway initiated a GBP 4 billion super-sewer initiative. Known as the Thames Tideway Tunnel, the construction project will not only upgrade the old sewer system to intercept the spills and clean up the river, but also leave behind a legacy that will benefit Londoners for over a century. The project consists of a 25-kilometer-long interception and transfer tunnel that travels through the heart of London at depths varying between 30 and 70 meters, relying on gravity to transfer waste from west to east. Expected to be complete in 2024, the tunnel is split into 24 sites, 11 of which are located along the banks of the River Thames. The work is divided into three packages for the west, central, and east sections of the tunnel, each one having a main drive site. Costain, VINCI Construction Grands Projets and Bachy Soletanche (CVB) JV is responsible for the GbP 850 million east-section contract that includes the main tunnel from Chambers Wharf to Abbey Mills Pumping Station, and a connection tunnel from Greenwich to Central London. The route includes 10 kilometers of tunnel works located 70 meters beneath the city of London, as well as six shafts. The project involves 12 design disciplines and numerous supply chains and stakeholders, presenting coordination and communication challenges. To successfully organize and manage construction amid the constraints of tight scheduling and small project sites, CVB JV promoted digital innovation to transform conventional construction practices and reconnect Londoners with their river. Integrated Technology Drives Constructioneering The transformational vision of Tideway is pushing the boundaries of traditional ways of working to reduce complexity and deliver value, right-first-time quality, and sustainability. To validate its program, work safer, enhance efficiency and productivity, and communicate more effectively, CVB JV relied on Bentleys integrated technology applications to drive constructioneering across all five east-section construction sites through 4D modeling. The project team established a connected data environment based on ProjectWise as the common platform for coordinated 3D modeling, information sharing, and data storage. "To achieve very high-quality models, the use of ProjectWise is the key to success,” stated Lampros Arvanitis, BIM coordinator, CVB JV for the east section of the Thames Tideway Tunnel. Working in the connected data environment, using OpenBuildings Designer as the main 3D authoring application, facilitated integration of supply chain models in different file formats with the 4D models developed in SYNCHRO 4D. The interoperability of SYNCHRO 4D facilitated this innovative workflow that combines 3D models with the construction schedule to produce a digital 4D plan, demonstrating project development over time. Using SYNCHRO 4D, CVB JV created over 30 4D models to analyze constructability and streamline construction planning. Integrating SYNCHRO 4D allowed site teams to open and integrate the models, creating a fully collaborative digital process between engineers, designers, and on-site construction teams that helped identify, mitigate, and manage unforeseen risks. The 4D modeling solution optimized constructioneering, enabling different construction scenarios to be evaluated for the Chambers Wharf ventilation chamber, located in South East London, to accommodate the poor access, egress, and limited available space. Similarly, at the Greenwich site, where the Docklands Light railway crosses the construction area, the team analyzed different schemes to identify potential risks and make decisions to determine a safe and viable construction solution. By implementing digital 4D workflows within a connected data environment, CVB JV is driving constructioneering to efficiently deliver a safer, more reliable, and sustainable Thames Tideway East Tunnel. 4D Collaborative Planning Streamlines Construction "We are not trying to perfect the model; we are trying to get it right on site,” explained Arvanitis. To achieve this "right-the-first-time,” on-site deliverable, CVB JV integrated 4D modeling with lean construction principles to create a 4D collaborative planning process. The process consists of regular planning sessions where all disciplines review the 4D models three weeks in advance of the scheduled works. Team members could discuss safety and constructability, as well as access, resources, potential risks, and opportunities. During the meetings, the team resolved any clashes, chose the optimum construction methodology, and updated the models to reflect any changes in the construction program, reducing delays and field-change request

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