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Images for LIQUEFACTION; more images...
BeckerFraserPhotos April 2011 photograph 164
Images, UC QuakeStudies
Building rubble and liquefaction on the footpath outside the former Public Library on the corner of Hereford Street and Cambridge Terrace.
BeckerFraserPhotos February 2011 photograph 341
Images, UC QuakeStudies
A badly damaged footpath at the end of Acland Avenue in Avonside. Dried liquefaction silt can be seen covering the pavement.
BeckerFraserPhotos November 2011 photograph 239
Images, UC QuakeStudies
Photograph captioned by BeckerFraserPhotos, "Ross Becker standing on the Town Hall steps which have been badly affected by liquefaction".
22 February Earthquake - Photograph 59
Images, UC QuakeStudies
A police car drives down a liquefaction-covered Geraldine Street in St Albans, past residents with shovels and wheelbarrows clearing silt.
BeckerFraserPhotos May 2013 photograph 064
Images, UC QuakeStudies
Abandoned residential properties on Seabreeze Close in Bexley. The front yards and footpaths are covered with weeds and silt from liquefaction.
BeckerFraserPhotos October 2010 photograph 053
Images, UC QuakeStudies
Road damage between St Paul's School and Gayhurst Road bridge. The road has slumped near the curb, probably due to liquefaction.
BeckerFraserPhotos May 2013 photograph 116
Images, UC QuakeStudies
An abandoned residential property at 23 Waygreen Avenue in New Brighton. The section is covered with weeds and silt from liquefaction.
BeckerFraserPhotos April 2011 photograph 162
Images, UC QuakeStudies
Building rubble and liquefaction on the footpath outside the former Public Library on the corner of Hereford Street and Cambridge Terrace.
BeckerFraserPhotos May 2013 photograph 076
Images, UC QuakeStudies
An abandoned residential property on Waireka Lane in Bexley. The road and footpath are covered with weeds and silt from liquefaction.
System Response of Liquefiable Deposits
Research papers, University of Canterbury Library
Results from a series of 1D seismic effective stress analyses of natural soil deposits from Christchurch are summarized. The analysed soil columns include sites whose performance during the 2010-2011 Canterbury earthquakes varied significantly, from no liquefaction manifestation at the ground surface to very severe liquefaction, in which case a large area of the site was covered by thick soil ejecta. Key soil profile characteristics and response mechanisms affecting the severity of surface liquefaction manifestation and subsequent damage are explored. The influence of shaking intensity on the triggering and contribution of these mechanisms is also discussed. Careful examination of the results highlights the importance of considering the deposit as a whole, i.e. a system of layers, including interactions between layers in the dynamic response and through pore water pressure redistribution and water flow.
The Undrained Cyclic Response of Monterey Sand in Direct Simple Shear
Research papers, University of Canterbury Library
In 2010 and 2011 a series of earthquakes hit the central region of Canterbury, New Zealand, triggering widespread and damaging liquefaction in the area of Christchurch. Liquefaction occurred in natural clean sand deposits, but also in silty (fines-containing) sand deposits of fluvial origin. Comprehensive research efforts have been subsequently undertaken to identify key factors that influenced liquefaction triggering and severity of its manifestation. This research aims at evaluating the effects of fines content, fabric and layered structure on the cyclic undrained response of silty soils from Christchurch using Direct Simple Shear (DSS) tests. This poster outlines preliminary calibration and verification DSS tests performed on a clean sand to ensure reliability of testing procedures before these are applied to Christchurch soils.
Rebekah Rogers WEMO Photograph 061
Images, UC QuakeStudies
A photograph of a large trench at the entrance to a street in Christchurch. There is water and liquefaction in the trench. Road cones have been placed around it as a warning. In the background, two personnel from the New Zealand Army are guarding the entrance to the street. They are wearing their army uniforms and high-visibility vests.
Rebekah Rogers WEMO Photograph 052
Images, UC QuakeStudies
A photograph of the earthquake damage to the corner of Woodham Road and Avonside Drive. There are large cracks in the road, and flooding and liquefaction. Wire fencing and road cones have been placed around parts of the road that are unsafe. Two signs reading, "Road closed" and, "No entry" can be seen at the entrance to Avonside Drive.
BeckerFraserPhotos October 2011 photograph 097
Images, UC QuakeStudies
Photograph captioned by BeckerFraserPhotos, "New Brighton Road".
BeckerFraserPhotos November 2010 photograph 29
Images, UC QuakeStudies
Road cones and portaloos along Avonside Drive.
BeckerFraserPhotos May 2013 photograph 066
Images, UC QuakeStudies
An abandoned residential property on Seabreeze Close in Bexley. The front yard and footpath are covered with weeds and silt from liquefaction.
BeckerFraserPhotos September 2010 photograph 087
Images, UC QuakeStudies
A private driveway off Halswell Road with extensive cracking. The driveway has slumped into the creek due to liquefaction from the earthquake.
BeckerFraserPhotos May 2013 photograph 067
Images, UC QuakeStudies
An abandoned residential property on Seabreeze Close in Bexley. The front yard and footpath are covered with weeds and silt from liquefaction.
22 February Earthquake - Photograph 63
Images, UC QuakeStudies
A woman walks through liquefaction in Hendon Street in St Albans. The photographer comments, "Hendon St, St Albans, is very heavily silted".
NicksPlace Photograph 035
Images, UC QuakeStudies
A man pushes a wheelbarrow full of liquefaction silt in Black Street in Kaiapoi. A small sinkhole is visible in the foreground.
June 2011 Earthquake - Photograph 01
Images, UC QuakeStudies
Flooding and liquefaction surround a house in Richmond. Bricks have fallen from the walls of the house, exposing the wooden framework beneath.
BeckerFraserPhotos October 2011 photograph 096
Images, UC QuakeStudies
Photograph captioned by BeckerFraserPhotos, "New Brighton Road".
BeckerFraserPhotos October 2011 photograph 095
Images, UC QuakeStudies
Photograph captioned by BeckerFraserPhotos, "New Brighton Road".
BeckerFraserPhotos October 2011 photograph 094
Images, UC QuakeStudies
Photograph captioned by BeckerFraserPhotos, "New Brighton Road".
BeckerFraserPhotos October 2011 photograph 093
Images, UC QuakeStudies
Photograph captioned by BeckerFraserPhotos, "New Brighton Road".
Liquefaction Constitutive Model Validation Using Pore Pressure Records fro…
Research papers, University of Canterbury Library
Well-validated liquefaction constitutive models are increasingly important as non-linear time history analyses become relatively more common in industry for key projects. Previous validation efforts of PM4Sand, a plasticity model specifically for liquefaction, have generally focused on centrifuge tests; however, pore pressure transducers installed at several free-field sites during the Canterbury Earthquake Sequence (CES) in Christchurch, New Zealand provide a relatively unique dataset to validate against. This study presents effective stress site response analyses performed in the finite difference software FLAC to examine the capability of PM4Sand to capture the generation of excess pore pressures during earthquakes. The characterization of the subsurface is primarily based on extensive cone penetration tests (CPT) carried out in Christchurch. Correlations based on penetration resistances are used to estimate soil parameters, such as relative density and shear wave velocity, which affect liquefaction behaviour. The resulting free-field FLAC model is used to estimate time histories of excess pore pressure, which are compared with records during several earthquakes in the CES to assess the suitability of PM4Sand.
BeckerFraserPhotos May 2013 photograph 093
Images, UC QuakeStudies
Two ducks in the driveway of 22 Waygreen Avenue. The section is covered with weeds and silt from liquefaction and has partly flooded.
QuakeStory Photo 686
Images, UC QuakeStudies
A photograph submitted by Ross Williamson to the QuakeStories website. The description reads, "Halberg Street looking south, liquefaction carted out from properties".
BeckerFraserPhotos June 2011 photograph 343
Images, UC QuakeStudies
Fallen rocks from a landscape feature in front of an apartment building on Ferry Road. Liquefaction silt can be seen on the driveway.
BeckerFraserPhotos March 2011 photograph 133
Images, UC QuakeStudies
A row of apartments on Armagh Street. At the end of the car park, a pile of silt from liquefaction can be seen.