For further information on this and other projects please
Crossrail C310 Thames Tunnel
Client: Crossrail Limited
Contractors Designers: HOCHTIEF Consult (Temp works) - Client design (Perm design)
Form of Contract: NEC3 Option C
Dates work carried out: 2011 - 2015
HOCHTIEF, in joint venture, successfully completed the Crossrail C310 Thames Tunnel project on time and on budget. The works comprised a wide range of civil engineering disciplines including construction of two 2.6km long 6.2m internal diameter bored tunnels through prominently Chalk rock strata and portal structures from Plumstead to North Woolwich. The sites were located in areas with significant third party and community stakeholder interfaces.
The launch and reception shafts for the TBMs comprise cut and cover approach structures of approximately 500m in length and 20m in depth which were constructed by diaphragm walling, secant, rotary bored and CFA piling. Due to the high water table, variable ground conditions and adjacent assets, the excavations required substantial temporary supports and extensive dewatering schemes with recharge.
Other temporary and permanent shafts were constructed with sizes ranging from 4.5 to 25m and depths of up to 15m. These have been constructed by wet caisson techniques with precast segmental linings, sheet piling and secant piling.
Associated works on the project undertaken by HMJV comprised:
The C310 team was recognised by Crossrail as one of the better performing contractors against their ‘league table’ as part of their Performance Assurance process and also received a ‘Green Line award’ for reaching Crossrail’s high standard of environmental engagement.