Water and Effluent Treatment Magazine
Issue link: https://fhpublishing.uberflip.com/i/906742
• Construction of Scottish Water's flagship Shieldhall Tunnel scheme is complete. We take a look at some of the scheme's key moments. " This is one of the most chal- lenging projects many of us have worked on… The com- pletion of the tunnel construc- tion is testament to the skills, knowledge and determination of our team who have safely delivered a high-quality piece of infrastructure that will have a huge positive impact for the city now and in the future." This is the verdict of Neil Grosset, who is project director for the Costain and VINCI Con- struction Grans Projets joint venture CVJV working on the Shieldhall Tunnel, a‚er con- struction of Scotland's largest wastewater tunnel was completed. The £100M Shieldhall Tun- nel is a flagship project for Scottish Water, and is needed to help tackle flooding and improve river water quality in the Glasgow area. The tunnel is a key part of Scottish Water's £250M, five-year programme of work, launched in 2013, to improve river water quality and the natural environment. It has taken 15 months for the giant state-of-the-art tun- nel boring machine (TBM) to create the 3.1 mile-long tunnel or sewer beneath the south of ONSITE TUNNELLING A journey's end: A jubilant team celebrate completing the new wastewater tunnel. Photos: SNS DECEMBER 2017 WET NEWS 13 The TBM starts to emerge as it constructs the final stage of the tunnel the city from Craigton to Queen's Park. With this key phase of the project now complete, further construction and ancillary work will be carried out includ- ing work to connect the tunnel to the existing wastewater net- work before the tunnel becomes operational next summer. Dominic Flanagan, Scottish Water Project Manager, says: "Many hundreds of people have worked as part of Costain VINCI Construction Grans Pro- jets Joint Venture (CVJV), which was set up to deliver the tunnel, to get us to this point. Building the tunnel has required a wide range of spe- cialist skills, knowledge and expertise and our workforce has included local contractors and those with international experience and backgrounds. We are all enormously proud of what we have achieved for the good of the people of Greater Glasgow." Mark Dickson, director of capital investment for Scottish Water, adds: "Communities across Greater Glasgow will benefit in many ways from the full commissioning of the tunnel in 2018. We recognise that a project like this can be disruptive and we have worked hard to minimise that wher- ever possible. Scottish Water is investing £3.5bn throughout the country to deliver infra- structure which is fit for com- munities now and for decades to come." In constructing the 4.7m-diam- eter tunnel: More than 3,200 concrete segment rings of the tunnel were installed More than 500,000 tonnes of earth, stone, clay and other aggregates has been excavated More than 1.5 million man hours of work have been completed on its construction More than 90% of material excavated has been recycled More than 20 miles of pipes were installed in the tunnel to service the TMB The tunnel can store the equivalent of 36 Olym- pic-sized swimming pools The TBM, affectionately known as Daisy the Driller, tunnelled at a speed of about two milli- metres per minute, with a Shieldhall scheme makes a breakthrough