London Underground has signed framework contracts with Cementation Skanska and Clancy Docwra worth up to £90 million.
The stabilisation schemes will include design and construction works and cover embankments and cutting that underpin the London Tube network.
The two five-year frameworks are worth up to £9m each year per contractor and will see them carry out work on both BCV (Bakerloo, Central and Victoria lines) and SSR (Circle, District, Hammersmith & City and Metropolitan lines).
LU civils programme manager David Sockett said: “The contracts will be economically efficient, incentivising both contractors to design the most cost effective solution and then construct it efficiently and LU will work closely with both contractors to ensure costs and programmes do not overrun.
“LU will shortly issue the first two years’ worth of work to allow them to plan and resource as efficiently and strategically as possible. Performance indicators will be used to monitor the contractors’ performances and the results may be used in the future in the awarding of work packages to the most successful contractor.”
London Underground is responsible for 150 km of cuttings and embankments that underpin the Tube network, which carries up to 4m passengers per day.
The lines are often more than 100 years old and have to be maintained due to weather effects and vegetation growth.
Following an eight-year programme to inspect and assess all the cuttings and embankments, a number of remedial projects has been identified to address the concerns of structural stability and track support, leading to these contract awards.