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Taylor Woodrow has been carrying out trials to construct screwed displacement piles 400mm in diameter and up to 14m long on a contaminated site adjacent to the Millennium Dome. Taylor Woodrow claims the significant advantage over other bored piling methods is that no contaminated arisings have to be removed from site. The company says that while driven piling also offers this benefit, screwed displacement piling is significantly quieter, making it suitable for noise sensitive sites.