M3 Junctions 3 and 4
To construct an additional lane at the northbound diverge for the M3 and associated works which included earthworks, drainage, safety narrier installation and surfacing.
CPM Hydrobrakes had to be retrofitted on to previously laid drainage usine band seals to connect into the chamber. The Hydrobrakes includes a series of 8 flow control chambers, 1 x 3000mm, 1 x 2400mm, 4 x 2100mm and 2 x 1500mm.
Sharon Sutton, BAM Nuttall Section Engineer commented that fitting the Hydro-brakes after the drainage had been laid shows that the chambers do not have to be constructed on line and as such the lead time for site means that the works can continue and the wait for delivery does not become a holding point for the contractor.