NZGS projects

Piling Specification Review

NZGS management committee lead: Tony Fairclough

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In 2019 a Panel of Experts was jointly appointed by the SESOC and NZGS National Management Committees to review and update the Auckland Structural Group (ASG) “Piling Specification” document. The last version of such document (Rev G) was issued on 12 March 2002.

The Project Panel of Experts has issued “Revision 1 – Final Draft for Public Comment” version of the SESOC/NZGS Piling Specification for feedback. Please return your completed feedback form via email to Teresa Roetman and Tony Fairclough by 6:00pm on Wednesday 28 April 2021.

Further details and links to download the consultation documents are available on the NZGS website here: https://www.nzgs.org/sesoc-nzgs-piling-specification-consultation-and-feedback/


NZ Ground Investigation Specification update

NZGS management committee lead: Ross Roberts

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The original specification was published in 2017 for feedback. The document is now ready for an update based on this feedback. The main proposed changes are simplification of references, improving the geophysics section, and creation of a simplified schedule table for small projects.


Soil and Rock Description update

Project lead: Stuart Read

NZGS management committee lead: Ross Roberts

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The NZGS has formally launched a project to review the Field Description of Soil and Rock. First published in 1988, and revised 17 years later in 2005, it is generally considered to be a great document. Feedback has suggested that some improvements could be made, and given that this guide is now approaching its 16th year a review is warranted. A small team led by Stuart Read has started to assess the scope of the project.


Ground anchor specification

Project lead: Katy Cottingham

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Details to follow. 


Slope stability guidelines

NZGS management committee leads: Sally Dellow and Sally Hargraves

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The New Zealand Geotechnical Society has produced six Earthquake Geotechnical Engineering Guideline Modules covering a range of geotechnical topics. These did not specifically address slope stability. 

In 2019 the NZGS management committee agreed to consider the creation of a seventh module for the assessment of slopes under seismic loading. It quickly became apparent that addressing the seismic case without first dealing with the static case would be problematic given the varied practice currently identified in the industry. 

A survey was sent to NZGS members requesting their feedback on a wider scope document. This survey identified a number of concerns about slope stability practice in New Zealand that could be resolved with more clear guidance. 


Young Professionals Training Modules

Project lead: Miles Boub

NZGS management committee lead: Helen Hendrickson

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A gap has been identified in the training available for recent graduates. A small group is developing a series of practical training materials to help bridge the gap between university learning and professional practice.


NZ Earthworks Specification

NZGS management committee lead: Ross Roberts

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During an update to NZS4431 it was identified that the lack of a consistent earthworks specification suitable for residential subdivision was causing issues with consistency and quality of work. This project aims to develop a specification compatible with the soon to be updated NZS4431.


Expansive soils practice note

NZGS management committee lead: Jen Smith

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Concerns have been raised by geotechnical practitioners in New Zealand about our approach to identifying, classifying and mitigating the effects of expansive soils. This project is intended to provide guidance for practitioners and consenting authorities to reduce the risks posed by expansive soils.


Building Act section 72 guidance

NZGS management committee lead: Sally Hargraves

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During an update to NZS4431 it was identified that the lack of a consistent earthworks specification suitable for residential subdivision was causing issues with consistency and quality of work. This project aims to develop a specification compatible with the soon to be updated NZS4431.


Subsoil drainage guidance

NZGS management committee lead: Sally Hargraves

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Good ground definition

NZGS management committee lead: Sally Hargraves

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