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Safety is paramount for Bachy and Carillion JV


Bachy Soletanche and Carillion Pilling have been working on an £18 million geotechnical contract, as part of carriageway improvements on the M1 motorway, junctions 10–13, from Luton to Milton Keynes, in the UK.

The work is being carried out for the Costain Carillion Joint Venture on behalf of the Highways Agency. Piling and soil-nailing works are to facilitate the conversion of the current hard shoulder to a peak-time running lane, with further junction improvements, including 60 sign gantries and emergency refuges, over the 25km length.

Construction will be phased between the three junctions, one carriageway at a time to avoid disruption to the travelling public, and to abide by health and safety regulations.

The project is due to last up to 90 weeks and includes the installation of 250 CFA gantry piles, each 750mm in diameter and 20m long, with vibrated, full-length reinforcement cages.

A further 1,600 CFA piles, of 750mm diameter, will be drilled for the contiguous bored pile walls. Also, 22,000 hollow-stem and solid-bar soil nails will be used to stabilise the new cuttings and embankments, which are 5-12m long. The embankments comprise a variety of fill materials, while the cutting slopes feature clay with flint, overlain by chalk.

A spokesperson for the piling team commented: “High levels of safety have been paramount with this project due to the close proximity of traffic and overhead power lines.

“We have implemented guarded rigs with a safe operator platform for soil nailing, improved guarding and auger cleaning for CFA piling, rope access systems, mobile grouting trailers, and a new Geoweb securing system to ensure the work is completed on time and with minimal safety risks.”
Courtesy geodrillinginternational


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