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Designing timber compaction piles to achieve a target soil density using CPTu data

Designing timber compaction piles to achieve a target soil density using CPTu data

  ABSTRACT For sites with shallow soil layers consisting of loose sand and/or potentially liquefiable soil, timber compaction piles (TCP) can be driven into the ground to improve the geotechnical performance of the site, particularly for land supporting residential and lightweight commercial or industrial buildings….

DEM simulation of 1-D compression test on pumice sand

DEM simulation of 1-D compression test on pumice sand

  ABSTRACT Previous studies have shown that pumice particles are highly crushable, compressible and lightweight as a result of their vesicular nature. Hence, they are problematic from an engineering viewpoint. Currently, there is limited information on the geotechnical characteristics of pumice deposits. To address this,…

Applicability of empirical SPT-CPT correlations for New Zealand soils

Applicability of empirical SPT-CPT correlations for New Zealand soils

  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…

Assessing the quality and uncertainty of in-situ seismic investigation methods

Assessing the quality and uncertainty of in-situ seismic investigation methods

  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…

Student Poster Competition Winners

A large number of very high-quality posters were submitted to the annual competition. After careful evaluation and much discussion, the judges decided that the winning posters for 2020 are: 1st place    Olivia ROSS / Julia YOUNG: Seismic and 1-D Compressibility Properties of Gravel-Rubber Mixtures (BE(Hons)…

NZGS Symposium 2021

CLOCKWISE FROM TOP LEFT: Eleni Gkeli and Ross Roberts opening the Symposium. Morning of Thursday 24 March – The main event begins!! The first online keynote speech by Sissy Nikolaou. MBIE and the Geotechnical Module update project panel answer the questions of the delegates. The…

Cantilever Pole Retaining Walls

Abstract Cantilever timber pole walls are one of the most commonly used forms of retaining wall construction used in New Zealand for low to moderate retained heights. Pole walls in New Zealand have mainly been designed using the isolated pile theory (Broms) or by continuous embedded…