Official Journal notice goes up for tunnels, shafts and subways at two stations
Crossrail has invited tenders for construction work on tunnels, shafts and subways on Liverpool Street and Whitechapel stations. A notice went up in the Official Journal today for contracts on each station, involving the construction of platforms, concourses, cross passages and escalator tunnels using sprayed concrete lining techniques. The Liverpool street contract is for 47 months and the Whitechapel deal is for 37 months.
Crossrail’s notice said the work would include:
- The review of the employer’s designs, during a preconstruction period to improve buildability and to mitigate
- The construction of platform, concourse, cross passage and escalator tunnels using sprayed concrete lining techniques
- The construction of temporary construction access shafts
- The transportation of all excavated material from the works by road, to pre-designated transfer facilities adjacent to the River Thames. The disposal of excavated material from these locations shall be the responsibility of others
- The provision of temporary invert fill to the platform tunnels to enable the running tunnel TBM's to be pulled through
- Monitoring of affected buildings and utilities/services for settlement during tunnelling operations
- The implementation of settlement mitigation measures including compensation grouting and other geotechnical techniques;
- All temporary facilities and services required to provide the works
Crossrail is the £15.9bn project to build a railway line linking east and west London, due for completion in 2017.