Project: King Posts at Buckton Castle, Stalybridge
Customer: United Utilities
Main Contractor: KMI
In 2002, a joint venture between Kier, Murphy and Interserve were constructing a new £4.7 million filtration system at a water treatment works in Oldham, as part of a £300 million framework deal awarded by United Utilities.
This required a 4.0m deep excavation with a perimeter of approximately 46 metres in total. The location of the excavation cut into the side of a fairly steep hill, meaning that a conventional 4 sided cofferdam excavation was not possible. The rocky and unpredictable ground conditions ruled out steel sheet piling or contiguous piling, and the lack of working space between the existing building and the excavation meant that raking supports were not feasible.
MGF designed and supplied a King Post and Infill Lining System which allowed the excavation to be supported without encroaching into the required working space. King Posts were 11.0m long 305 x 305 x 240 kg/m, Grade 50 Universal Column sections installed in 600mm diameter concrete filled pre-bored holes. Post were at 3.6m centres with MGF Heavy Duty Infill Lining Panels spanning between them.
MGF’s design and bespoke manufacturing capability provided KMI Water with a safe, effective and easy to install solution for a fairly complex problem.The working space required for the construction of the permanent structure was achieved without difficulty and the progression of the scheme was fast.
The high quality of service provided by MGF, along with the experienced team on site ensured that the filtration system was successfully completed in good time.
Download the full case study PDF here: KMI Buckton Castle.pdf