MBIE Building Performance Update
Tim Farrant – Engineering ManagerKiran Saligame – Senior Geotechnical Engineer Key highlights include:
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Simplified CPT-based liquefaction ejecta severity model using Christchurch data
K.M. Azul, R.P. Orense & L.M. WotherspoonUniversity of Auckland, Auckland, New Zealand. ABSTRACTChristchurch, New Zealand, and its surrounding areas experienced significant liquefaction-induced damage during the 2010-2011 Canterbury Earthquake Sequence (CES) events. Ejecta is one of the liquefaction manifestations commonly observed and can cover significant parts…
Liquefaction Characteristics of Gravelly Soils Prepared by Water Sedimentation Method
L. Wang, G. Chiaro & S. ReesDepartment of Civil and Natural Resource Engineering, University of Canterbury, ChristchurchC. CappellaroTonkin & Taylor, ChristchurchA. PokhrelBeca Limited, Christchurch ABSTRACTField observations and evaluations from 32 case histories of liquefaction in gravelly soils worldwide, including three in New Zealand, have indicated…
Under the mountain – City Rail Link, tunnel portal temporary retaining structure design and construction challenges
S.A.B. Farquhar & Y.F. ThorpTonkin & Taylor Ltd, New Zealand ABSTRACTThe City Rail Link (CRL) is the largest transport infrastructure project ever to be undertaken in New Zealand. It comprises a 3.45 km twin-tunnel underground rail link up to 42 m below the city centre….
PGA adjustment factors for TS1170.5 to account for nonlinear site response on soft soils
C.A. de la Torre, M. Cubrinovski & B.A. BradleyDepartment of Civil and Environmental Engineering, University of Canterbury, Christchurch, New Zealand.S.S. BoraGNS Science, Avalon, New Zealand. ABSTRACTThis paper summarises the development and implementation of an adjustment factor for PGA from the 2022 update of the New…
Engineering Uncertainty: The Struggle Between Facts and Beliefs in Geotechnics
Dr Burt LookAGTRE Pty Ltd, Queensland, Australia. ABSTRACTThis paper has 2 parts; 1) Cognitive Dissonance in geotechnical practice and 2) Risk and uncertainty in practice. To advance geotechnical engineering practice, bridging the gap between empirical judgment and statistical analysis is essential.Cognitive dissonance—conflicts between beliefs and…
Development and progress of the Master of Engineering Geology degree at the University of Auckland
Abstract We describe the development, curriculum content and pedagogic context of the Master of Engineering Geology (MEG) programme at the University of Auckland. This programme is in its 5th year, and is currently one of the few active postgraduate engineering geology programmes in Australasia. Since…
The use of hydrofraise cutter technology to construct diaphragm walls in Auckland
ABSTRACT Deep basements and structures such as shafts for infrastructure often require embedded retaining walls to allow safe excavation and the control of groundwater. In urban environments the effects of retaining structure deformation and settlement associated with dewatering or groundwater drawdown can be significant…
CUTTER SOIL MIXING USED TO FACILITATE PIPELINE CONSTRUCTION, WYNYARD POINT, NZ.
ABSTRACT The Cutter Soil Mixing (CSM) method was used for in-situ mixing of contaminated reclaim ground at Wynyard Point, in the waterfront area of Auckland, to facilitate the installation of a large diameter outfall pipeline. A soil/cement block was formed by the CSM working…