At 260 metres long and at a depth of 26 metres, the platform tunnels for Crossrail’s Bond Street Station sit below some of the most expensive real estate in the world. Excavated in Londa Clay, the platform tunnels were formed first by segmental lining from the passing of two Earth Pressure Balance (EPB) Tunnel Boring Machines (TBM) and then enlarged using Sprayed Concrete Lining (SCL). As a mitigation for the predicted settlement from tunnelling, compensation grouting was employed in the geology above the tunnels.

The construction of the Crossrail project began at North Dock in Canary Wharf in May 2009. Six years on, it is the biggest railway construction project in Europe and is one of the largest single infrastructure investments undertaken in the UK. It consists of 21 km of new twin-bore tunnels under central London and 10 new world-class stations constructed under the largest city in the European Union.

The construction of the Crossrail project began at North Dock in Canary Wharf in May 2009. Five years on, it is the biggest railway construction project in Europe and is one of the largest single infrastructure investments undertaken in the UK.