Volume loss and long term settlement at Kempton Court, Whitechapel

Kempton Court is located in the zone of influence of Whitechapel Station tunnels, Figure 1. Whitechapel station comprises two deep excavations extending from ground level down to the platform tunnel level, one at Durward Street (DSS) and one at Cambridge Heath Road (CHS). The station at depth includes two main station platform tunnels at 24m below ground level (bgl) each about 11m in diameter. Various connecting cross passages, escalator tunnels and emergency escape routes are constructed between the platform tunnels and connect with the deep excavations.

All station tunnels were excavated using the LaserShell^TM method with sprayed concrete as primary and permanent support. LaserShell^TM has been developed for Heathrow’s Terminal 5 tunnelling works. Details of the LaserShell^TM can be found in Eddie and Neumann (2003 and 2004) and Chapman et al. (2010) [9, 10].