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Design of the Lee Tunnel project in London, Cambridge

19 October, 2016 | 18:30 - 20:30

Lee Tunnel shaft
Lee Tunnel shaft

About this event

The Lee Tunnel Project is the first phase of the biggest upgrade to the sewerage system of London since Victorian times that will, in the next few years, include the Thames Tideway and the consequent environmental clean-up. As commissioning draws to a completion and the tunnel commences full operation, principal engineer Quentin Rea of Mott MacDonald will provide the designer’s perspective on the project.

Mott MacDonald engineered three of the Lee Tunnel shafts, the sheer size and depth of which posed challenges the design team had never tackled before. Rising commodity prices, squeezed budgets and the introduction of ultra-stringent regulations formed the backdrop for the design and construction of the shafts – which are among the deepest in the capital. An added challenged was that the client, Thames Water, was looking for whole life cost savings.

The project was successfully commissioned during the early months of 2016, following a construction period enhanced by a series of design innovations including using slow-setting concrete grout backfill around the shaft linings as a means of reducing reinforcement quantities. The Lee Tunnel was consequently awarded a special prize for making the ‘Greatest Contribution to London’ at the Institution of Civil Engineers London Civil Engineering Awards.

Tea, coffee and sandwiches will be served from 18:00, with the talk starting at 18:30.

For more information please contact Douglas White or Joey Le Gresley
e: douglas.white@mottmac.com or e: joey.leGresley@skanska.co.uk