TUNNELLING HAS fallen behind by three weeks on one of the Channel Tunnel Rail Link (CTRL) contracts in east London.
The first of two TBMs for the £115M Contract 250 was scheduled for launch towards Stratford at Ripple Lane near Dagenham at the end of August.
C250 is part of Section Two of the CTRL which runs from Ebbsfleet in Kent to London St Pancras.
But Amec engineers, contracted by CTRL project manager Rail Link Engineering (RLE) to monitor ground settlement caused by the TBM, have been told they are not required until later this month.
The main London to Southend railway, known as C2C, runs directly above part of the 5.25km twin bore tunnel route and Amec is to monitor settlement to ensure that tunnelling does not cause any differential settlement that could lead to costly railway closures.
RLE Section Two operations manager Ian Galloway confirmed this week that tunnelling was three weeks late.
He said this was partly due to delays in getting access to the TBM launch pit to install spoil removal equipment and partly because of mechanical problems with the first TBM.
He added that the contractor for the project, a Nuttall/Wayss & Freytag/Kier joint venture, was working to fix the 8.15m diameter Lovat machine.
'It's a small delay, ' he said.
'If it goes on for a long time it may be a problem - but we're working on it.'
INFOPLUS www. nceplus.co.uk/magazine/ rail