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Images for liquefaction; more images...
Northern Outlook Image: Derek Flynn 2010:09:11 10:41:00
Images, UC QuakeStudies
Photograph captioned by Fairfax, "Marlborough Civil Defence manager Ross Hamilton inspects the liquefaction damage at a property in Seabreeze Close, Bexley".
The Timaru Herald Image: Derek Flynn 2010:09:11 10:24:08
Images, UC QuakeStudies
Photograph captioned by Fairfax, "Marlborough Civil Defence manager Ross Hamilton inspects the liquefaction damage at a property in Seabreeze Close, Bexley".
The Timaru Herald Image: Derek Flynn 2010:09:11 10:23:43
Images, UC QuakeStudies
Photograph captioned by Fairfax, "Marlborough Civil Defence manager Ross Hamilton inspects the liquefaction damage at a property in Seabreeze Close, Bexley".
A CPT-based effective stress analysis procedure for liquefaction assessment
Research papers, University of Canterbury Library
There is a growing awareness of the need for the earthquake engineering practice to incorporate in addition to empirical approaches in evaluation of liquefaction hazards advanced methods which can more realistically represent soil behaviour during earthquakes. Currently, this implementation is hindered by a number of challenges mainly associated with the amount of data and user-experience required for such advanced methods. In this study, we present key steps of an advanced seismic effective-stress analysis procedure, which on the one hand can be fully automated and, on the other hand, requires no additional input (at least for preliminary applications) compared to simplified cone penetration test (CPT)-based liquefaction procedures. In this way, effective-stress analysis can be routinely applied for quick, yet more robust estimations of liquefaction hazards, in a similar fashion to the simplified procedures. Important insights regarding the dynamic interactions in liquefying soils and the actual system response of a deposit can be gained from such analyses, as illustrated with the application to two sites from Christchurch, New Zealand.
Liquefaction case histories from the West Coast of the South Island, New Z…
Research papers, University of Canterbury Library
Liquefaction is a phenomenon that results in a loss of strength and stability of a saturated soil mass due to dynamic excitation such as that imposed by an earthquake. The granular nature of New Zealand soils and the location of many of our cities and towns on fluvial foundations are such that the effects of liquefaction can be very important. Research was undertaken to build on the past work undertaken at the University of Canterbury studying the effects of the 1929 Murchison earthquake, the 1968 Inangahua earthquake and the 1991 Hawks Crag earthquakes on the West Coast. Additional archival information has been gathered from newspapers and reports and from discussions with people who experienced one or all of these large earthquakes that occurred on the West Coast during the 20th Century. Further, some twenty Cone Penetrometer Tests were carried out, with varying success, in Greymouth and Karamea using the Department of Civil Engineering's Drilling Rig. These, combined with the basic site investigation information, consolidate and add to the liquefaction case history data bank at the University of Canterbury. Many of the sites have liquefied in some but not all of the three earthquakes and thus provide both upper and lower bounds for the calibration of empirical models. While a lack of knowledge of the 1929 source location reduces the value of information from that event, the data form a useful set of liquefaction case histories and will become more so as further earthquakes occur. A list of critical sites for checking of the future earthquakes is provided and recommendations are made for the installation of downhole arrays of accelerometers and pore water pressure transducers at a number of sites.
Christchurch Press Image: Kirk Hargreaves 2010:10:24 15:49:35
Images, UC QuakeStudies
Photograph captioned by Fairfax, "Judy Lawn carting liquefaction off her friends property damaged on an unstable part of Locksley Avenue in Dallington".
Photograph by Jocelyn Kinghorn 1942
Images, UC QuakeStudies
Damage down a residential street. The road is covered in silt from liquefaction and a portaloo can be seen in the background.
Liquefaction triggering of Christchurch sandy soils during earthquakes
Research papers, University of Canterbury Library
The empirical liquefaction triggering chart of Idriss and Boulanger (2008) is compared to direct measurements of the cyclic resistance of Christchurch silty sands via undisturbed and reconstituted lab specimens. Comparisons suggest that overall there is a reasonable agreement between the empirical triggering curve and the interpreted test data. However, the influence of fines on cyclic resistance appears to be over-predicted by the empirical method, particularly for non-plastic silty sands that are commonly encountered in flood over-bank deposits in Christchurch and nearby settlements
Christchurch Press Image: Carys Monteath, 2011:02:23 06:38:17
Images, UC QuakeStudies
Photograph captioned by Fairfax, "Damage from the February 22nd earthquake in Christchurch. Massive liquefaction on St Martins Road in St Martins, Christchurch".
Christchurch Press Image: Carys Monteath, 2011:02:23 06:38:07
Images, UC QuakeStudies
Photograph captioned by Fairfax, "Damage from the February 22nd earthquake in Christchurch. Massive liquefaction on St Martins Road in St Martins, Christchurch".
Christchurch Press Image: Carys Monteath, 2011:02:23 06:48:07
Images, UC QuakeStudies
Photograph captioned by Fairfax, "Damage from the February 22nd earthquake in Christchurch. Massive liquefaction on St Martins Road in St Martins, Christchurch".
Photograph by Jocelyn Kinghorn 634
Images, UC QuakeStudies
The road and footpath in Richmond are covered with liquefaction. Recycling and rubbish bins waiting for collection can be seen down the footpath.
Photograph by Jocelyn Kinghorn 632
Images, UC QuakeStudies
The road and footpath in Richmond are covered with liquefaction. Recycling and rubbish bins waiting for collection can be seen down the footpath.
Photograph by Jocelyn Kinghorn 1929
Images, UC QuakeStudies
The land and houses close to the Avon River have been badly damaged. Many road and footpaths are covered in silt from liquefaction.
Photograph by Jocelyn Kinghorn 1930
Images, UC QuakeStudies
The land and houses close to the Avon River have been badly damaged. Many road and footpaths are covered in silt from liquefaction.
Photograph by Jocelyn Kinghorn 1938
Images, UC QuakeStudies
The road and footpath are covered in silt from liquefaction in a residential area. A portaloo stands at the front of the house.
Canterbury Earthquake 2011
Images, eqnz.chch.2010
Our Street - Liquefaction (22.02.2011) Woolston Christchurch Canterbury New Zealand © 2011 Phil Le Cren Photo Taken With: Canon EOS 1000D + Canon EF/EF-S lenses + 10.1 effective megapixels + 2.5-inch TFT color LCD monitor + Eye-level pentamirror SLR + Live View shooting. + EOS Built-in Sensor cleaning system + Wide-...
Canterbury Earthquake 2011
Images, eqnz.chch.2010
Our Street - Liquefaction Sand (23.02.2011) Woolston Christchurch Canterbury New Zealand © 2011 Phil Le Cren Photo Taken With: Canon EOS 1000D + Canon EF/EF-S lenses + 10.1 effective megapixels + 2.5-inch TFT color LCD monitor + Eye-level pentamirror SLR + Live View shooting. + EOS Built-in Sensor cleaning system + ...
Canterbury Earthquake 2011
Images, eqnz.chch.2010
Vehicles Stuck - Our Street - Liquefaction (23.02.2011) Woolston Christchurch Canterbury New Zealand © 2011 Phil Le Cren Photo Taken With: Canon EOS 1000D + Canon EF/EF-S lenses + 10.1 effective megapixels + 2.5-inch TFT color LCD monitor + Eye-level pentamirror SLR + Live View shooting. + EOS Built-in Sensor cleani...
Canterbury Earthquake 2011
Images, eqnz.chch.2010
Our Street - Liquefaction (22.02.2011) Woolston Christchurch Canterbury New Zealand © 2011 Phil Le Cren Photo Taken With: Canon EOS 1000D + Canon EF/EF-S lenses + 10.1 effective megapixels + 2.5-inch TFT color LCD monitor + Eye-level pentamirror SLR + Live View shooting. + EOS Built-in Sensor cleaning system + Wide-...
Canterbury Earthquake 2011
Images, eqnz.chch.2010
Our Street - Liquefaction Sand (23.02.2011) Woolston Christchurch Canterbury New Zealand © 2011 Phil Le Cren Photo Taken With: Canon EOS 1000D + Canon EF/EF-S lenses + 10.1 effective megapixels + 2.5-inch TFT color LCD monitor + Eye-level pentamirror SLR + Live View shooting. + EOS Built-in Sensor cleaning system + ...
Canterbury Earthquake 2011
Images, eqnz.chch.2010
Vehicles Stuck - Our Street - Liquefaction (23.02.2011) Woolston Christchurch Canterbury New Zealand © 2011 Phil Le Cren Photo Taken With: Canon EOS 1000D + Canon EF/EF-S lenses + 10.1 effective megapixels + 2.5-inch TFT color LCD monitor + Eye-level pentamirror SLR + Live View shooting. + EOS Built-in Sensor cleani...
Canterbury Earthquake 2011
Images, eqnz.chch.2010
Vehicles Stuck - Our Street - Liquefaction (23.02.2011) Woolston Christchurch Canterbury New Zealand © 2011 Phil Le Cren Photo Taken With: Canon EOS 1000D + Canon EF/EF-S lenses + 10.1 effective megapixels + 2.5-inch TFT color LCD monitor + Eye-level pentamirror SLR + Live View shooting. + EOS Built-in Sensor cleani...
Canterbury Earthquake 2011
Images, eqnz.chch.2010
Our Street - Liquefaction (22.02.2011) Woolston Christchurch Canterbury New Zealand © 2011 Phil Le Cren Photo Taken With: Canon EOS 1000D + Canon EF/EF-S lenses + 10.1 effective megapixels + 2.5-inch TFT color LCD monitor + Eye-level pentamirror SLR + Live View shooting. + EOS Built-in Sensor cleaning system + Wide-...
Canterbury Earthquake 2011
Images, eqnz.chch.2010
Vehicles Stuck - Our Street - Liquefaction (23.02.2011) Woolston Christchurch Canterbury New Zealand © 2011 Phil Le Cren Photo Taken With: Canon EOS 1000D + Canon EF/EF-S lenses + 10.1 effective megapixels + 2.5-inch TFT color LCD monitor + Eye-level pentamirror SLR + Live View shooting. + EOS Built-in Sensor cleani...
Christchurch Press Image: Carys Monteath, 2011:02:23 06:44:19
Images, UC QuakeStudies
Photograph captioned by Fairfax, "Damage from the February 22nd earthquake in Christchurch. Liquefaction at the St Martins Shopping Centre in St Martins, Christchurch".
Christchurch Press Image: Carys Monteath, 2011:02:23 06:46:00
Images, UC QuakeStudies
Photograph captioned by Fairfax, "Damage from the February 22nd earthquake in Christchurch. Liquefaction at the St Martins Shopping Centre in St Martins, Christchurch".
Christchurch Press Image: Carys Monteath, 2011:02:23 06:45:01
Images, UC QuakeStudies
Photograph captioned by Fairfax, "Damage from the February 22nd earthquake in Christchurch. Liquefaction at the St Martins Shopping Centre in St Martins, Christchurch".
Christchurch Press Image: Carys Monteath, 2011:02:23 06:44:46
Images, UC QuakeStudies
Photograph captioned by Fairfax, "Damage from the February 22nd earthquake in Christchurch. Liquefaction at the St Martins Shopping Centre in St Martins, Christchurch".
Christchurch Press Image: Dean Kozanic 2010:09:06 14:45:36
Images, UC QuakeStudies
Photograph captioned by Fairfax, "Aftermath of Christchurch earthquake as residents start to clean up. 'Sand for sale!!' sign on a pile of liquefaction silt".