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Research papers, The University of Auckland Library

A number of field testing techniques, such as standard penetration test (SPT), cone penetration test (CPT), and Swedish weight sounding (SWS), are popularly used for in-situ characterisation. The screw driving sounding (SDS) method, which has been recently developed in Japan, is an improved version of the SWS technique and measures more parameters, including the required torque, load, speed of penetration and rod friction; these provide more robust way of characterising soil stratigraphy. It is a cost-efficient technique which uses a machine-driven and portable device, making it ideal for testing in small-scale and confined areas. Moreover, with a testing depth of up to 10-15m, it is suitable for liquefaction assessment. Thus, the SDS method has great potential as an in-situ testing method for geotechnical site characterisation, especially for residential house construction. In this paper, the results of SDS tests performed at a variety of sites in New Zealand are presented. The soil database was employed to develop a soil classification chart based on SDS-derived parameters. Moreover, using the data obtained following the 2010-2011 Christchurch Earthquake Se-quence, a methodology was established for liquefaction potential evaluation using SDS data. http://www.isc5.com.au/wp-content/uploads/2016/09/1345-2-ORENSE.pdf

Images, UC QuakeStudies

A photograph of the site of the Crowne Plaza Hotel on the corner of Kilmore and Durham Streets. The hotel has been demolished, leaving large piles of rubble which two excavators are working to clear.

Images, UC QuakeStudies

A photograph of members of the public walking along Gloucester Street near the Colombo Street intersection. In the background, the site of the demolished Farmers Building can be seen as well as the car park to the left.

Images, UC QuakeStudies

Smoke issuing from the collapsed Canterbury Television building on Madras Street. Fire Service personnel have gathered around the site to control the fire. In the background, excavators can be seen digging through the rubble.