ROGER BULLIVANT has extended its range of precast piles to cover any base pile size in the RB range, from 150mm square to 355mm square.
The RB Taper Pile's principal benefit comes when piling through contaminated ground into water-bearing strata.
The tapered lead section means that the ground through which the pile is being driven is constantly tightened. This eliminates the potential for the passage of contaminants down the shaft of the pile, a potential problem that the Environment Agency has identified with standard straightsided piles in certain ground conditions.
The taper also reduces the risk of small pellets of contaminated material being taken down beneath the toe of the pile during driving.
A report commissioned by Bullivant from Geotechnical Consulting Group concluded that 'tapered displacement piles in sand have capacity between 1.5 and 4 times higher than straightsided piles.'