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Contractors World - 2016 Vol 6 No 2

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  Work Begins On Major Drainage
   Survey Of Severn Tunnel


Lanes Group drainage engineers have begun the task of carrying out a survey of tunnel drainage along the 7km-long Severn Tunnel.

The company has been commissioned by Amey, working for Network Rail, to carry out the surveys in the tunnel, which for over 100 years was the longest main line railway tunnel in the UK.

The work is one of a number of enabling projects preparing the way for the electrification of the Great Western Main Line between London Paddington and the west of England and South Wales.

In the first of yearly packages of examinations completing various sections, four teams of Lanes Group drainage engineers completed CCTV drainage surveys along 1,600m of track through the tunnel in 30 hours.

Ben Forsyth, National Business Development Manager for Lanes Group, said:

Thanks to careful pre-planning, and very good team working between Lanes and Amey personnel, we completed the planned surveys more than six hours ahead of schedule.
     This trial run gives us a very good insight into what we can achieve in the packages of work that will follow. Conditions in the tunnel can be challenging, but we’re confident we know now how best to complete the surveys.

Robert Woods, Senior Project Manager for Amey, said:

We know from experience that track access can be a challenge when carrying out inspection work. Together with Lanes Group, we used CCTV and new ways of working to overcome this issue and deliver this part of the project ahead of schedule.

The CCTV surveys are being carried out on the ‘six foot’ central tunnel drainage culvert between the two lines that run through the tunnel, which is 7,008 m (4 miles 24 yards) long.

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