Griffin and Associates Ltd are committed to engineering best practice. Our engineers are experienced industry professionals and maintain their competence with continuing professional development.
Following the 2010/2011 Canterbury Earthquake Sequence, the Department of Building and Housing (now the Ministry of Business, Innovation and Employment) published guidance and set new requirements for development. Recent changes to the New Zealand Standards require all Territorial Authorities to ensure that liquefaction potential has been considered in design.
Our engineers make regular reference to the following technical documents and websites when completing our geotechnical assessments:
- Boulanger, R.W. and Idriss, I.M., 2014. CPT and SPT based liquefaction triggering procedures. Rep. No. UCD/CGM-14, 1. Center for Geotechnical Modeling, Department of Civil and Environmental Engineering, University of California, Davis, CA, 134 pp
- Zhang, G., Robertson, P.K. and Brachman, R.W., 2002. Estimating liquefaction-induced ground settlements from CPT for level ground. Canadian Geotechnical Journal, 39(5), pp.1168-1180.
Regional Geology / Regional Geotechnical Information
- Geological Maps (Institute of Geological and Nuclear Sciences Limited)
- Canterbury Maps (Environment Canterbury)
- Listed Land Use Register (Environment Canterbury)
- New Zealand Geotechnical Database
- Christchurch District Plan (Christchurch City Council)
Published Standards and Guidance
- Earthquake geotechnical engineering practice Modules 1 – 6. New Zealand Geotechnical Society (NZGS) and Ministry of Business, Innovation and Employment (MBIE) (2016).
- New Zealand Standards (Standards New Zealand)
- Repairing and rebuilding houses affected by the Canterbury earthquakes (Ministry of Business, Innovation, and Employment, 2012)