cushions of pile heads

cushions of pile heads

              the top of a pile is damaged by the impacts of the blows, therefore, piles must protected by cushion of some resilience material whilst they are being driven, to absorb shocks with steam hammer a suitable driven head made of cast iron is provided to fit top of the pile.

 A thick packing of felt, bags of saw dust, gunny bags, old rags, ropes or such like material, is placed over the pile head and under a block of hardwood, which is placed on the top of the cast iron driving hood. The cushion should  not normally more than 75 mm thick but should give enough protection to the pile head and should not absorb too much of energy of the blow.