Keywords

Rock strength, Unconfined Compressive Strength, Point Load Index, Brisbane River, Queensland, Australia

Abstract

Surface geology and rock strength properties are discussed for the lower 50 km of the Brisbane River through a snapshot of cross sections along the river. The Brisbane River is tidal with a varied geological history which can be traced to the Triassic Period. River width and depth to bed level are compared as the river snakes through Brisbane City with a large drainage catchment. Statistical properties and correlations of some of the various rock units uncover the range and variability along the river, providing a basis for engineering design decisions and the assessment of project risk. Unconfined Compressive Strength (UCS) to Point Load Index (I_s(50)) and UCS to tangent modulus (E) correlations are developed.

DOI