A clear and effective specification is an essential tool to help ensure that projects achieve the objectives desired by the client, geotechnical designer and contractor. While project-specific specifications can be useful in accurately describing the exact requirements for each project, they result in a steep…
Presented by Mark Stringer, University of Canterbury in July 2021
https://doi.org/10.1016/j.sandf.2019.05.004 Dr Stringer received the 2018-2021 JW Ridley Geomechanics Paper award, for his paper “Separation of Pumice from Soil Mixtures“, originally published in Soils and Foundations in August 2019. Abstract Pumice-rich deposits are found in a number of locations around the world, and in particular…
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…
Abstract The earthquakes that hit the region of Canterbury, New Zealand, in 2010-2011 resulted in severe damage to buildings and infrastructure due to widespread liquefaction of natural clean sand and silty sand deposits of fluvial origin. Despite the significant hazard posed by earthquake-induced liquefaction to…
The gel-push sampling technique was developed to try to provide an economic technique capable of obtaining high quality specimens of silty sands and sands. This paper describes two of the gel-push samplers which are now commercially available and describes their performance on recent projects carried out on…
The simplified liquefaction evaluation methods reasonably predicted the severity and extent of liquefaction in Christchurch during the 2010-2011 Canterbury Earthquake Sequence, however there are important cases where moderate-to-severe liquefaction was predicted yet no liquefaction manifestation was observed. These high levels of conservatism have been identified…
Pumiceous deposits exist in many areas of the North Island, and pose a particular challenge to engineering projects due to the difficulties associated with characterizing these materials. Key characteristics of pumice grains are their high crushability, their low density and the presence of voids, both…
