SHORING MANUFACTURER and supplier Groundforce has used its heavy duty support system for a new chlorine storage tank in South Wales.
Working with main contractor Laing, for client Hyder Utilities, the firm supplied its Megabrace frame support for the 35m long, 15m wide and 7.75m sheet piled excavation. The tank forms part of the £17.5M upgrade of the Felindre water treatment works, Wales's largest single treatment facility.
The main problem was a large diameter water pipe running across one edge of the excavation, at the bottom level of support. The pipe could not be diverted until the new structure was finished.
Close collaboration between the Laing Technical and Groundforce design departments resulted in additional support where the pipe and the brace met. Several cross struts had to be skewed across the excavation to support the opposite side of the brace. Special 11m central strut sections catered for the increased load at the longer spans. Knee braces were also needed for all three levels to maintain integrity and strength of the shoring system.