Engineers Australia

Jacked end-bearing piles in the soft alluvial sediments of Perth

Barry Lehane, Derek Pennington and Sam Clarke

Abstract

Precast concrete piles jacked through soft alluvial sediments and onto bedrock or dense gravels have been employed as foundations for two recent large projects located on the Perth foreshore. A static test performed on a 36.7 m deep instrumented pile at one of these sites is described in detail in this paper and is used subsequently to assess characteristics of pile shaft friction in the soft sediments as well as those of end-bearing in the bedrock. The instrumented pile test results are also compared with established design correlations for other similar ground conditions.