Renescience Bio Plant, Northwich | CFA Piling | Vibro | Keller UK

REnescience Bio Plant, Northwich

Dong Energy is building the world’s first bio plant of its kind using their Renescience technology to treat household waste through the use of enzymes.

It will handle 120,000 tonnes of unsorted household waste from 110,000 homes and will produce some 5MW of renewable electricity.

Keller was asked to devise a ground improvement solution that catered for the varying site conditions and treatment depth and keep to a demanding 19-week works timetable.

Keller offered a top feed Vibro Replacement support system to achieve safe bearing pressures ranging from 50kN/m2 up to 150kN/m2 for the main building, 6 no anerobic tanks and other site structures. Pre-boring was adopted to assist penetration of the vibrating poker to the natural weaker strata that required stabilisation.

The design depths varied between 2.5m and 6.0m to suit the varying site conditions, stopping in the competent natural strata of stiff sandy gravelly clay. Keller completed the 5,900 No. stone columns in  3 No. phased visits, using 2 No. MiniCat Vibro rigs and 2 No. pre-boring rigs.

Client: Dong Energy

Main contractor: Cobalt Energy

Year of execution: 2016

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