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Sheet Piling A52

The A52 Wyvern Transport Improvement Scheme will bring about network management improvements on the A52 Brian Clough Way and in the area around the Wyvern Retail Park and Pride Park. The scheme will help to reduce congestion, improve journey times and reliability, provide safer travel opportunities, increase sustainable travel and also support wider economic growth. The scheme was originally one of 31 proposed major transport schemes considered by Derby City Council. It will also provide economic benefits and this was one of the reasons it was selected for funding by the D2N2 LEP (Derby, Derbyshire, Nottingham and Nottinghamshire Local Enterprise Partnership).

The main works contract was awarded to Galliford Try in October 2017 under the Midlands Highways Alliance framework. In June 2019, CR Civil Engineering awarded Aarsleff the design and build contract for the sheet piling temporary works to protect the road when main works were being carried out.

From the 8th August 2019 to 27th September 2019, Aarsleff installed 372No. sheet piles, of max length 15m, to form a temporary sacrificial sheet piled cofferdam for 4.5-5.5m free standing retained heights. Due to the site’s difficult ground conditions, Aarsleff first pre-augered and vibrated the piles with their ABI TM17 Rig, and then used impact driving with their Banut 300 midi-rig. Impact driving is one of the best methods for driving piles into difficult ground or final driving of piles to level in panel form. Aarsleff adopted a clear working space of 1.0m to the tank crates, following a simplified alignment. Once installed, the cofferdam allowed for bulk excavation and the construction of a attenuation tank to control the flow of rainwater as it goes back to the water course/drainage system.

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