K.M. Azul, R.P. Orense & L.M. WotherspoonUniversity of Auckland, Auckland, New Zealand. ABSTRACTChristchurch, New Zealand, and its surrounding areas experienced significant liquefaction-induced damage during the 2010-2011 Canterbury Earthquake Sequence (CES) events. Ejecta is one of the liquefaction manifestations commonly observed and can cover significant parts…
1st August 2023 Presenters: Liam Wotherspoon, Chris Massey and Kerry Leith
Abstract The recent update to the National Seismic Hazard Model has changed the approach to seismic site classification in New Zealand, with the time-averaged shear wave velocity over the top 30 m of the subsurface profile (VS30) at a site now being a key site…
ABSTRACT Using a database of 230 co-located cone penetration tests (CPT) and boreholes with standard penetration tests (SPT) from sites across Christchurch, New Zealand, this paper assesses the applicability of a range of existing SPT-CPT correlations from international studies. Both simple linear CPT-SPT relationships…
ABSTRACT Design in New Zealand is increasingly requiring parameters obtained from in-situ seismic testing for use in modelling and assessment of the built environment. In New Zealand shear wave velocity (VS) profiles are most commonly required. However, the quality of in-situ seismic testing can…
This presentation will provide an overview of the regional geotechnical and geophysical site investigation studies that have recently been carried out across New Zealand, with a focus on improving our understanding of sedimentary basin structures and the shear wave velocity of regional soil deposits. The…
1. Introduction Coastal communities globally face the unprecedented task of adapting to elevated coastal hazard risk under changing environmental conditions, including sea-level rise. Sea-level rise will continue for centuries, and while the rate of future sea-level rise is uncertain, there will undoubtedly be an increase…
Abstract Following the companion study of McGann et al. [1], seismic piezocone (SCPTu) data compiled from sites in Christchurch, New Zealand area are used with multiple linear regression to develop a Christchurch-specific empirical correlation for use in predicting soil shear wave velocities, Vs, from cone…
Abstract Liquefaction has been reported following upwards of 13 recent and historical earthquakes in New Zealand. Collating reports outlining the extents of liquefaction manifestation following these events provides insights into the distributions of sediments with low cyclic resistances to liquefaction, and enables liquefaction hazard assessments…
Abstract The four-lane, 21.8 kilometre long, Hamilton Section of the Waikato Expressway is the largest roading project undertaken in this region’s history and one of the larger projects currently being undertaken in New Zealand. Many of the seventeen expressway bridges in the Hamilton Section are…
