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Hangover cure The push to develop urban brownfield sites has galvanised piling technology. Rodney Byles describes one company's solution, while Richard Thompson (below) looks at another new option.

The new brand of continuous helical displacement piles, developed by specialist foundations engineering contractor Roger Bullivant, is unlikely to be put to a more severe test than providing the support for the 'Hangover', a 5M white knuckle rollercoaster ride which opens in Southport, Lancashire next year. The plethora of Bullivant's vertical and raking CHD piles will cater for rapidly fluctuating compressive and tensile loads generated by the suspended rollercoaster train as it travels ...

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