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Contractors World 2011 Volume 2 Issue 1
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SWEDEN

A major upgrade of the Swedish railway system in the Gothenburg area in south-west Sweden is on the fast track for completion in 2012 with much of the progress attributed to new drilling technology.

Atlas Copco Boomer XE4 C, a new, fully computerized, four-boom drill rig that drills holes for pre-grouting as well as blast holes

 

ON THE FAST TRACK
Gothenberg rail tunnel speeds to completion with new drilling technology

The Hede–Älvängen railway tunnel near Gothenberg, Sweden, is rapidly on its way to completion. The project got under way in February 2010 and by January this year, more than two thirds of the 1.8 km tunnel had been excavated.
The new, twin-track railway is part of a major upgrade of the Gothenburg to Trollhättan line – a stretch of about 70 km – paving the way for high speed trains and doubling the capacity of the existing network in the south west of the country.

The tunnel, which is being driven through the hills of Kattleberg, is 13.5 m wide, 10.8 m high and includes the construction of an emergency escape tunnel (cross section 35 m²) as well as a 500 m long adit. “Everything has been going smoothly on this job so far and we are achieving all of the targets we set out to achieve,” says Anders Östberg, Plant and Machine Manager for the sub-contractor, Veidekke Entreprenad. The main contractor for the entire project is PEAB.

The tunnel, which is being driven through the hills of Kattleberg, is 13.5 m wide, 10.8 m high and includes the construction of an emergency escape tunnel (cross section 35 m²) as well as a 500 m long adit.     Östberg attributes this to the skill of the Veidekke engineers coupled with the advanced capabilities of the drilling equipment being used – an Atlas Copco Boomer XE4 C, a new, fully computerized, four-boom drill rig that drills holes for pre-grouting as well as blast holes. Automatic rod handling is also making a significant contribution to speed and efficiency.

Joint development project

Sweden is one of the few countries in the world where pre-grouted, unlined tunnels are consistently used for all civil tunnel works and the Hede–Älvängen rail tunnel is no exception to Sweden’s PEAB, the company decided it would need a four- boom drill rig that could drill all of the required pre-grouting holes as well as the blast holes – and preferably without increasing the number of operators.. . . . CONT > > >

 

 

 

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