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Contractors World  - UK & Ireland
2013 Vol 3 No 4
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Out & About

TBM Makes Breakthrough On National Grid Contract continued

The breakthrough at St John’s Wood was hailed by National Grid’s Head of Cable Tunnels, David Luetchford, as “a dramatic illustration of how National Grid plays its part in connecting people to the energy they use.

“It’s nice to think that as Londoners go about their business, Evelyn, Cleopatra and our engineers are at work deep underground, helping to make sure that the capital’s future energy needs are met.”

National Grid has also launched a brand new tunnel boring machine (TBM) in Camden. Named “Powering Paula” by local school pupil Zavier Achiampong, the machine is helping to dig the new 32 km of the electricity superhighway.

50 metres in length and 4 metres in diameter, Powering Paula was designed and manufactured in England. She was lowered into the pre-prepared tunnel shaft at St Pancras substation and is tasked with constructing some of the smaller “spur tunnels” required to access the main tunnel.

The machine will also line the spur tunnels with pre-prepared concrete segments. The London Power Tunnels project is due to be completed in 2018 and once operational will play a key part in bringing electricity to homes across the capital.

Click here for more information >>> Costain

First 100 metres of new £15m pipeline installedNorth Wales

First 100 metres of new £15m pipeline installed

The first section of a new pipeline to supply the hydro-electric power station in Dolgarrog has been completed.

Work on the £15m replacement project, which will help ensure the power station remains operational for the foreseeable future, is progressing according to schedule.

Jones Bros Civil Engineering UK is replacing the 90-year-old Coedty pipeline, which supplies water to RWE npower renewables’ Dolgarrog Hydro Electric Power Station.

Work on the project began in November, and to date has included significant improvements to access roads and the full removal of the previous pipeline, which has reached the end of its working life.

Site engineers are now in the process of replacing the 1200 metre long pipeline. A section 100 metres in length has already been welded into place at an area above Dolgarrog known as Marble Arch, the lowest part of the pipeline.

As work progresses, the pipeline is also being covered in a protective coating to prevent corrosion and protect its steel structure from the environment. In addition to the replacement work, Jones Bros will be creating an auxiliary surge pipe to protect from excess water flow, as well as constructing two new valve houses.

Jones Bros project manager Ivan Rawlins said: “It’s a really challenging scheme, but things are progressing according to plan.

Click here for more information >>> Jones Bros Civil Engineering


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