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Chair’s Corner

If the last six months have felt busy to you, you’re not the only one. Despite notable failures, overall the construction sector continues to grow strongly, and forecasts suggest this will continue for some time yet. The National Construction Pipeline Report (MBIE, 2019), anticipates continued…

NZ Ground Investigation Specification

NZ Ground Investigation Specification

Introduction There has not previously been a standard template in New Zealand for the specification and procurement of ground investigation work, and specifications varied significantly from project to project and between organisations.  Long project specific specifications were unlikely to be fully read by tenderers (at least…

A ground investigation specification for New Zealand

A ground investigation specification for New Zealand

Abstract Until 2017 there was no standard template in New Zealand to assist in the specification and procurement of ground investigations, and so consequently specifications varied significantly from project to project and between organisations. This caused numerous problems: (1) Long project specific specifications were unlikely…

Preliminary assessment of the acid sulphate soils hazard in the Auckland region

Preliminary assessment of the acid sulphate soils hazard in the Auckland region

Abstract Acid Sulphate Soils have recently been encountered on projects in Whangarei and Auckland. These naturally occurring soils are rich in sulphide minerals that have the potential to cause changes in soil and water chemistry when they oxidise. This oxidation process occurs naturally but may…

Volcanic hazard from the Auckland Volcanic Field

Volcanic hazard from the Auckland Volcanic Field

Abstract The Auckland Volcanic Field, which last erupted ~600 years ago, is a late Quaternary monogenetic basaltic volcanic field of approximately 500 km2. A recent study (Leonard et al., 2017) has improved the accuracy of eruption dates for 23 of the eruptive centres. Previously only 12…

AGS4 NZ Electronic transfer of data

The concept of transferring geotechnical data between all industry parties in electronic format is widely used internationally. As computer technology has become an integral component of the geotechnical industry, producers and users of geotechnical information have adopted digital database systems to store, manage, analyse and present their data. Currently,…

A comparison of methods for measuring defect orientation from boreholes in weak rock

A comparison of methods for measuring defect orientation from boreholes in weak rock

The identification and characterisation of defects within a rock mass is a valuable tool when analysing potential and pre-existing slope instability as well as when assessing the stability and support requirements for tunnelling and underground structures. A good knowledge of rock defect data is extremely important to enable…