Construction of the ventilation towers at Tottenham Court Road Elizabeth line station

Document type: Technical Paper
Author: Joseph Maltezos, Tim Harman, The Structural Engineer
Publication Date: 02/07/2018

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  • Abstract

    Tottenham Court Road Elizabeth line station is a new station located in the heart
    of London, adjacent to Oxford Street, being delivered as part of the Crossrail
    programme. The station is expected to accommodate more than 200 000
    passengers every day when it becomes operational in December 2018. The station is
    of paramount importance due to its strategic location, interchange with the London
    Underground and future link to Crossrail 2.

    Tottenham Court Road consists of two entrances on the east (Goslett Yard Box)
    and west (Western Ticket Hall) sides of Soho Square, each of which has a ventilation
    tower equipped to ventilate the 250m long new platforms and running tunnels located
    25m below ground (Figure 1). The ventilation towers are two of the largest overground
    structures on the entire Crossrail project, and presented a vast array of challenges due
    to their locations as well as their technical complexity.

    Following the award of the contract to Laing O’Rourke, discussions were held about
    changing the design of the superstructures to precast concrete. However, due to the
    design process that would have been required to alter the concept, and lead time
    for bespoke precast elements, there was not sufficient time to alter the construction
    methodology. Therefore, a traditional in situconcrete approach was used. In fact, due to
    the precise planning and coordination of this approach, it resulted in a more economical
    solution than the precast option.

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