Construction of rock socketed piles in Sydney Sandstone to meet performance requirements

Pawan L. Sethi, Ingrid Geng and Patrick K. Wong


Construction aspects are critical to ensure that the design intent / requirements are achieved through good construction methodology and quality control. This translates into ensuring the pile shaft/sidewalls are to a large extent free of crushed or smeared rock. Similarly, the base should be clear of any debris also. Presence of soft material / debris on the base of the pile will alter the load deflection characteristics.

In order to meet the performance requirements through construction a strategy was formulated. The strategy included an advance programme of proof core drilling, use of appropriate drilling tools, reference to the available site investigation information and full-time geotechnical supervision.