Geotechnical aspects of the 2016 Kaikōura earthquake on the South Island of New Zealand
Item
Title (Dublin Core)
en-US
Geotechnical aspects of the 2016 Kaikōura earthquake on the South Island of New Zealand
Description (Dublin Core)
en-US
The magnitude Mw7.8 ‘Kaikōura’ earthquake occurred shortly after midnight on 14 November 2016. This paper presents an overview of the geotechnical impacts on the South Island of New Zealand recorded during the post-event reconnaissance.
Despite the large moment magnitude of this earthquake, relatively little liquefaction was observed across the South Island, with the only severe manifestation occurring in the young, loose alluvial deposits in the floodplains of the Wairau and Opaoa Rivers near Blenheim. The spatial extent and volume of liquefaction ejecta across South Island is significantly less than that observed in Christchurch during the 2010-2011 Canterbury Earthquake Sequence, and the impact of its occurrence to the built environment was largely negligible on account of the severe manifestations occurring away from the areas of major development.
Large localised lateral displacements occurred in Kaikōura around Lyell Creek. The soft fine-grained material in the upper portions of the soil profile and the free face at the creek channel were responsible for the accumulation of displacement during the ground shaking. These movements had severely impacted the houses which were built close (within the zone of large displacement) to Lyell Creek. The wastewater treatment facility located just north of Kaikōura also suffered tears in the liners of the oxidation ponds and distortions in the aeration system due to ground movements.
Ground failures on the Amuri and Emu Plains (within the Waiau Valley) were small considering the large peak accelerations (in excess of 1g) experienced in the area. Minor to moderate lateral spreading and ejecta was observed at some bridge crossings in the area. However, most of the structural damage sustained by the bridges was a result of the inertial loading, and the damage resulting from geotechnical issues were secondary.
Despite the large moment magnitude of this earthquake, relatively little liquefaction was observed across the South Island, with the only severe manifestation occurring in the young, loose alluvial deposits in the floodplains of the Wairau and Opaoa Rivers near Blenheim. The spatial extent and volume of liquefaction ejecta across South Island is significantly less than that observed in Christchurch during the 2010-2011 Canterbury Earthquake Sequence, and the impact of its occurrence to the built environment was largely negligible on account of the severe manifestations occurring away from the areas of major development.
Large localised lateral displacements occurred in Kaikōura around Lyell Creek. The soft fine-grained material in the upper portions of the soil profile and the free face at the creek channel were responsible for the accumulation of displacement during the ground shaking. These movements had severely impacted the houses which were built close (within the zone of large displacement) to Lyell Creek. The wastewater treatment facility located just north of Kaikōura also suffered tears in the liners of the oxidation ponds and distortions in the aeration system due to ground movements.
Ground failures on the Amuri and Emu Plains (within the Waiau Valley) were small considering the large peak accelerations (in excess of 1g) experienced in the area. Minor to moderate lateral spreading and ejecta was observed at some bridge crossings in the area. However, most of the structural damage sustained by the bridges was a result of the inertial loading, and the damage resulting from geotechnical issues were secondary.
Creator (Dublin Core)
Stringer, Mark E.
Bastin, Sarah
McGann, Christopher R.
Cappellaro, Claudio
Kortbawi, Maya El
McMahon, Rebecca
Wotherspoon, Liam. M.
Green, Russell A.
Aricheta , Jason
Davis, Ross
McGlynn, Leigh
Hargraves, Sally
Ballegooy, Sjoerd Van
Cubrinovski, Misko
Bradley, Brendon A.
Bellagamba, Xavier
Foster, Kevin
Lai, Carlo
Ashfield, Dan
Baki, Abdul
Zekkos, Adda
Lee, Robin
Ntritsos, Nikolaos
Publisher (Dublin Core)
en-US
New Zealand Society for Earthquake Engineering
Date (Dublin Core)
2017-06-30
Type (Dublin Core)
info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
en-US
Article
Format (Dublin Core)
application/pdf
Identifier (Dublin Core)
https://bulletin.nzsee.org.nz/index.php/bnzsee/article/view/71
10.5459/bnzsee.50.2.117-141
Source (Dublin Core)
en-US
Bulletin of the New Zealand Society for Earthquake Engineering; Vol 50 No 2 (2017); 117-141
2324-1543
1174-9857
Language (Dublin Core)
eng
Relation (Dublin Core)
https://bulletin.nzsee.org.nz/index.php/bnzsee/article/view/71/57
Rights (Dublin Core)
en-US
Copyright (c) 2017 Mark E. Stringer, Sarah Bastin, Christopher R. McGann, Claudio Cappellaro, Maya El Kortbawi, Rebecca McMahon, Liam. M. Wotherspoon, Russell A. Green, Jason Aricheta , Ross Davis, Leigh McGlynn, Sally Hargraves, Sjoerd Van Ballegooy, Misko Cubrinovski, Brendon A. Bradley, Xavier Bellagamba, Kevin Foster, Carlo Lai, Dan Ashfield, Abdul Baki, Adda Zekkos, Robin Lee, Nikolaos Ntritsos
en-US
https://creativecommons.org/licenses/by/4.0
