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and nature lovers will be able to visit and enjoy Wallasea Island for generatons to come.”

C300 wes te r n r unn i ng t unne l s contractor BFK (BAM/Ferrovial/Kier JV) will shortly appoint a rail freight operator to transport excavated material from Royal Oak to Northfeet.

Complex cross-London logistics

F r e i g h t t r a i n s w i l l t r a v e l f r om Westbourne Park to Northfleet via the Great Western Main Line, the Greenford Loop, West London Line, Clapham and Lewisham. Up to f ive freight trains will operate from Westbourne Park on Mondays to Saturdays with up to four trains on Sundays. To enable these freight trains to operate, additional sidings will be constructed at Westbourne Park with improvement work undertaken to track and embankments on the Greenford Loop.

Excavated material from the eastern tunnels (running from Limmo Peninsula to Farringdon) wi l l emerge from the L immo shaf t . Thi s mater ial wi l l be transported via conveyor belts to Instone Wharf for direct loading onto ships and onward transportat ion to Wal lasea Island.

For the Thames Tunnel which will be constructed between Plumstead and North Woolwich, the excavated slurry material will emerge at the Plumstead Portal, where it will be filter pressed to reduce i ts water content before transportaton for reuse.. [CW]

Need for specialised and conventional equipment

Railtrack working is, in many respects, more demanding for contractors because access is always a problem. Main access is generally along existng railtrack with its many bridges, overhead gantries, electrifcaton installations and more. Very often, specialised equipment is necessary, such as the track mounted telescopic crane from Balfour Beatty, and Hydrema road/rail travel excavators.

There are added difficulties if adjacent tracks are ‘live’ and in use by freight and passenger trains.

In and around London and other cites, it is a priority to keep commuter trains operatng as far as possible.

So essental are these lines that railtrack working ofen has to be done at night when the line can be closed and the high-voltage power turned off. This requires powerful portable floodlight systems which, together with other equipment, needs to be as quiet as possible.

Hire companies such as HE Services are frequently called upon to provide necessary equipment to meet specific challenges in the works. The ability to hire in conventional equipment allows the contractors involved to invest more into the specialised equipment used.

Pot of Gold awaits the contractors working on the Crossrail project as work fnishes for the day at

Wallasea.

All photographs courtesy of Lafarge

Photographer: Blackmedia

Lafarge Balfour Beaty Hydrema

Lafarge Balfour Beaty Hydrema

Page 13 Contractors World - UK & Ireland Vol 1 No 7

Page 13 - vwuk-1-7

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