Impact of the Calder's Wharf development on Docklands Light Railway tunnels, London, UK

Abstract

This paper describes the redevelopment of Calder's Wharf, London, a four-storey block of residential units. As part of this redevelopment a detailed finite-element and ground movement analysis was undertaken to establish the potential impact of the proposed structure on two Docklands Light Railway (DLR) tunnels that run directly below the site and beneath the footprint of the proposed development. The case study presents the as-constructed displacements within the tunnel lining and compares these real-time measurements with the predictive models used in the engineering design. The analysis indicated that stress changes over the long term on the tunnel linings were of the order of 5 kPa maximum. This is equivalent to an increase in depth of the tunnel of 0.25 m and was not considered to be material to the tunnel.