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Images for liquefaction silt; more images...
22 February Earthquake - Photograph 66
Images, UC QuakeStudies
Bricks from a demolished chimney lie on top of thick liquefaction silt in front of a house in St Albans. The photographer comments, "Our friend Chris Hutching's house. The front lawn and carport have 30cm or more of silt piled on top. He also had to remove a shaky chimney".
22 February Earthquake - Photograph 65
Images, UC QuakeStudies
Bricks from a demolished chimney lie on top of thick liquefaction silt in front of a house in St Albans. The photographer comments, "Our friend Chris Hutching's house. The front lawn and carport have 30cm or more of silt piled on top. He also had to remove a shaky chimney".
Banks Avenue, Richmond - Photograph 22
Images, UC QuakeStudies
A power pole on the corner of Medway Street and Woodchester Avenue is on a lean, standing in a puddle of water and liquefaction silt. In the foreground road cones surround a pile of silt. The photographer comments, "Intersection of Medway St with Woodchester Ave and Flesher Ave, 10 days after the February quake".
BeckerFraserPhotos April 2011 photograph 034
Images, UC QuakeStudies
A view down New Brighton Road where silt from liquefaction still remains on the street curb. A power pole is now on a noticeable lean.
Rebekah Rogers WEMO Photograph 047
Images, UC QuakeStudies
A photograph of a portaloo outside a residential property in Christchurch. After the 22 February 2011 earthquake, many houses had no running water and were forced to use chemical toilets or portaloos placed along the street. There is flooding and liquefaction on the street in the foreground. Liquefaction silt has been piled on the side of the road and a road cone placed in front.
BeckerFraserPhotos October 2011 photograph 223
Images, UC QuakeStudies
Photograph captioned by BeckerFraserPhotos, "23 Seabreeze Close, Bexley. Look at the angles in this doorway and the pile of silt".
BeckerFraserPhotos May 2013 photograph 115
Images, UC QuakeStudies
An abandoned residential property at 25 Waygreen Avenue in New Brighton. The section is covered with weeds and silt from liquefaction. Stones are scattered across the driveway.
BeckerFraserPhotos May 2013 photograph 062
Images, UC QuakeStudies
Abandoned residential properties at 39 (left), 41 (centre), and 37 (right) Seabreeze Close in Bexley. The front yard and footpath are covered with weeds and silt from liquefaction.
BeckerFraserPhotos May 2013 photograph 045
Images, UC QuakeStudies
An abandoned residential property at 14 Seabreeze Close in Bexley. The damaged garage door has been boarded up. The driveway is covered with weeds and silt from liquefaction.
BeckerFraserPhotos June 2011 photograph 342
Images, UC QuakeStudies
Liquefaction silt surrounding a power pole in Ferry Road, next to a cut-out of a smiling and waving David Carter, National MP for the Port Hills electorate.
BeckerFraserPhotos June 2011 photograph 341
Images, UC QuakeStudies
Liquefaction silt surrounding a power pole in Ferry Road, next to a cut-out of a smiling and waving David Carter, National MP for the Port Hills electorate.
BeckerFraserPhotos May 2013 photograph 109
Images, UC QuakeStudies
Road cones line Waygreen Avenue in New Brighton. Flooding can be seen along the edge of the road. The footpath is covered with weeds and silt from liquefaction.
BeckerFraserPhotos May 2013 photograph 083
Images, UC QuakeStudies
An abandoned residential property at 10 Waygreen Avenue in New Brighton. The section is covered with weeds and silt from liquefaction. The front of the section is partly flooded.
BeckerFraserPhotos May 2013 photograph 117
Images, UC QuakeStudies
An empty section where a house once stood at 21 Waygreen Avenue in New Brighton. The footpath is partly flooded and is overgrown with weeds and silt from liquefaction.
BeckerFraserPhotos May 2013 photograph 106
Images, UC QuakeStudies
An abandoned residential property at 28 Waygreen Avenue in New Brighton. The section is overgrown with weeds and silt from liquefaction. The footpath to the left has partly flooded.
BeckerFraserPhotos May 2013 photograph 077
Images, UC QuakeStudies
An abandoned residential property at 1A Seabreeze Close in Bexley. The front of the property is overgrown and footpath is also covered with weeds and silt from liquefaction.
BeckerFraserPhotos May 2013 photograph 081
Images, UC QuakeStudies
An abandoned residential property at 6 Waygreen Avenue in New Brighton. The garage door has buckled. The front yard and footpath are covered with weeds and silt from liquefaction.
BeckerFraserPhotos December 2011 photograph 2271
Images, UC QuakeStudies
A photograph captioned by BeckerFraserPhotos, "Stepping stones to allow you to walk over the silt at 19 Reaby Street in the Horseshoe Lake district".
BeckerFraserPhotos May 2013 photograph 125
Images, UC QuakeStudies
An abandoned residential property at 3 Waygreen Avenue in New Brighton. The section and footpath is overgrown with weeds and silt from liquefaction. A bare tree stands on the footpath.
Bike Ride in the East Side - Photograph 08
Images, UC QuakeStudies
A crane sits beside the sewage treatment ponds in Bromley. In the distance can be seen large piles of liquefaction silt. The photographer comments, "Bromley sewage treatment ponds, under repair".
22 February Earthquake - Photograph 09
Images, UC QuakeStudies
Damage to River Road in Richmond. The road surface is badly cracked and slumped, and liquefaction silt covers part of the road. The photographer comments, "Lateral spreading cracks in River Rd".
BeckerFraserPhotos May 2013 photograph 065
Images, UC QuakeStudies
Abandoned residential properties on Seabreeze Close in Bexley. The front yard and footpath are covered with weeds and silt from liquefaction. The frame of a gazebo is partially covered with cloth.
BeckerFraserPhotos May 2013 photograph 069
Images, UC QuakeStudies
An abandoned residential property at 15 Seabreeze Close in Bexley. The front yard and footpath are covered with weeds and silt from liquefaction. A cluster of bricks lie in the grass.
Cyclic Undrained DSS Testing of Christchurch Sandy Silty Soils
Research papers, University of Canterbury Library
Earthquake-triggered soil liquefaction caused extensive damage and heavy economic losses in Christchurch during the 2010-2011 Canterbury earthquakes. The most severe manifestations of liquefaction were associated with the presence of natural deposits of clean sands and silty sands of fluvial origin. However, liquefaction resistance of fines-containing sands is commonly inferred from empirical relationships based on clean sands (i.e. sands with less than 5% fines). Hence, existing evaluation methods have poor accuracy when applied to silty sands. The liquefaction behaviour of Christchurch fines-containing (silty) sands is investigated through a series of Direct Simple Shear (DSS) tests. This type of test better resembles earthquake loading conditions in soil deposits compared to cyclic triaxial tests. Soil specimens are reconstituted in the laboratory with the water sedimentation technique. This preparation method yields soil fabrics similar to those encountered in fluvial soil deposits, which are common in the Christchurch area. Test results provide preliminary indications on how void ratio, relative density, preparation method and fines content influence the cyclic liquefaction behaviour of sand-silt mixtures depending on the properties of host sand and silt.
BeckerFraserPhotos October 2011 photograph 226
Images, UC QuakeStudies
Photograph captioned by BeckerFraserPhotos, "23 Seabreeze Close, Bexley. The view through the window here shows the size of the silt piled against the front door".
BeckerFraserPhotos May 2013 photograph 103
Images, UC QuakeStudies
An abandoned residential property at 34 Waygreen Avenue in New Brighton. The front of the section is overgrown with weeds and silt from liquefaction. Cushions lie on the footpath outside the gate.
BeckerFraserPhotos May 2013 photograph 080
Images, UC QuakeStudies
A flooded footpath at 12 Waygreen Avenue in New Brighton. The footpath is covered with weeds and silt from liquefaction. Road cones can have been placed along the street in the background.
BeckerFraserPhotos May 2013 photograph 070
Images, UC QuakeStudies
An abandoned residential property at 11 Seabreeze Close in Bexley. The front yard and footpath are covered with weeds and silt from liquefaction. "HM" has been spray-painted on the front of the house.
BeckerFraserPhotos December 2011 photograph 2351
Images, UC QuakeStudies
A photograph captioned by BeckerFraserPhotos, "A residential property on Waygreen Avenue in New Brighton. A note reads, 'Don't bother digging! Thanks anyway'. This family moved out after the February earthquakes, due to damage from liquefaction. The stone made the house heavy so it sank and suffered from silt and water creating mould and other problems inside the house".
BeckerFraserPhotos October 2011 photograph 224
Images, UC QuakeStudies
Photograph captioned by BeckerFraserPhotos, "23 Seabreeze Close, Bexley. Through the window pane beside the door you can see silt piled about 30 cm high inside the house".