This paper was originally prepared for the Australian Geomechanics Society Vic symposium in 2020 and is reproduced by permission of AGS Abstract Climactic warming caused by the emissions of anthropogenic greenhouse gasses is occurring across the globe. These changes will increase the exposure of the built…
Abstract Pumice-rich deposits are found in a number of locations around the world, and in particular across large areas of the North Island of New Zealand. Pumice grains are commonly described as being lightweight, highly crushable, and vesicular in nature. These characteristics give rise to…
Lecture Summary There is a growing emphasis on Displacement Based Earthquake Design (DBD) analysis for buildings, retaining walls and bridge structures. DBD is specified as the preferred design method for highway structures in a draft revision of Section 5 of the Bridge Manual (NZ Transport…
Abstract This paper describes the geotechnical aspects of a collaborative seismic assessment and foundation strengthening design for an existing building in the Tauranga CBD. The reinforced concrete 6 storey high structure is supported on concrete piles founded on potentially liquefiable volcanic soils. Initial assessments concluded…
Abstract Results from high strain dynamic pile testing (PDA) of impact driven piles are frequently correlated to pile driving sets and temporary compression, to obtain site specific modifications of driving formulae. An accurate record of driving set and temporary compression is required to obtain meaningful…
Abstract The Mackays to Peka Peka Expressway is part of the Wellington Northern Corridor, identified as a Road of National Significance for New Zealand. The Expressway runs in close proximity to several wetlands of significant ecological and cultural value with unique fauna and flora, and…
Abstract The movement of many landslides is controlled by the force imbalance associated with a reduction in shear resistance caused by a decrease in normal effective stress as pore water pressures increase. This basic premise might lead to an assumption that the movement rate has…
Abstract Routine effective stress analyses for failure of geotechnical structures use a linear Mohr-Coulomb envelope and routine analyses for ground movements use linear elasticity with constant Young’s Modulus E’ or one-dimensional modulus M’. Observations of soil behaviour show that strength and stiffness are non-linear and…
Abstract Until 2017 there was no standard template in New Zealand to assist in the specification and procurement of ground investigations, and so consequently specifications varied significantly from project to project and between organisations. This caused numerous problems: (1) Long project specific specifications were unlikely…
Abstract Currently, there is an increasing interest in providing more sustainable solutions for mitigating liquefaction and interdisciplinary work has started to introduce the use of nano-materials for this purpose. These materials have some advantages when compared with traditional techniques. For instance, they could be injected…
