14th Australia New Zealand Conference on Geomechanics, Cairns, 2023
Claystone deposits are commonly intercepted in road slope cuttings, for example in Southern Queensland and thus the understanding of the shear behaviour of these deposits is important for geotechnical engineers for design, construction, and maintenance works. These sedimentary deposits are often weakly bonded, and the engineering behaviour is akin to heavilyoverconsolidated plastic clays. Show more…Apart from difficulties in sampling these deposits, interpretation of shear behaviour in triaxial tests is often challenging. The paper presents the results of a triaxial investigation and discusses some of the challenges involved in the conduct and interpretation of the results. Further, the pitfalls of directly using the laboratory shear results at the field scale are highlighted, drawing attention to the potential for progressive and delayed failures that are observed in the field. Some requirements for constitutive modelling for numerical analysis are also emphasized.Show less…
