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Images for liquefaction silt; more images...
Banks Avenue, Richmond - Photograph 04
Images, UC QuakeStudies
A pile of liquefaction silt on the side of a street in Richmond. The photographer comments, "Liquefaction silt took several weeks to be cleared away".
Canterbury Earthquake September 2010 - Photograph 47
Images, UC QuakeStudies
Footprints in liquefaction silt on the side of a residential street. The photographer comments, "Silt has accumulated everywhere".
22 February Earthquake - Photograph 56
Images, UC QuakeStudies
A digger scrapes up liquefaction silt from Warden Street in Shirley. The photographer comments, "Clearing silt in Warden St".
22 February Earthquake - Photograph 89
Images, UC QuakeStudies
A push lawnmower sits in liquefaction silt beside the porch of a house. The photographer comments, "A friend's house, liquefaction covers the front lawn".
Bike Ride in the East Side - Photograph 02
Images, UC QuakeStudies
The sewage treatment ponds in Bromley. In the distance trucks and diggers can be seen piling up liquefaction silt. The photographer comments, "Looking NW from the causeway through the sewage wetlands. Mountains of liquefaction silt are being piled up near the corner of Breezes Rd and SH74-Anzac Drive".
Bike Ride in the East Side - Photograph 04
Images, UC QuakeStudies
Trucks and diggers build large piles of liquefaction silt. In the foreground can be seen the Bromley sewage treatment ponds. The photographer comments, "Looking NW from the causeway through the sewage wetlands. Mountains of liquefaction silt are being piled up near the corner of Breezes Rd and SH74-Anzac Drive".
22 February Earthquake - Photograph 55
Images, UC QuakeStudies
A digger scrapes up liquefaction silt from Warden Street in Shirley, while workers with shovels look on. The photographer comments, "Clearing silt in Warden St".
22 February Earthquake - Photograph 54
Images, UC QuakeStudies
A truck on Warden Street in Shirley waits to be loaded with liquefaction silt, which a digger in the background is scraping off the road. The photographer comments, "Liquefaction clean-up".
22 February Earthquake - Photograph 50
Images, UC QuakeStudies
Liquefaction silt covers the ground in front of the Shirley Medical Centre, and more silt is piled beside the entrance. The photographer comments, "These photos show our old house in River Rd and recovery work around Richmond and St Albans. The local medical centre is seriously silted up".
22 February Earthquake - Photograph 49
Images, UC QuakeStudies
Liquefaction silt covers the ground in front of the Shirley Medical Centre, and more silt is piled beside the entrance. The photographer comments, "These photos show our old house in River Rd and recovery work around Richmond and St Albans. The local medical centre is seriously silted up".
Bike Ride in the East Side - Photograph 03
Images, UC QuakeStudies
Trucks and diggers build large piles of liquefaction silt. One pile has been covered with plastic sheeting, weighted down with tyres. In the foreground can be seen the Bromley sewage treatment ponds. The photographer comments, "Looking NW from the causeway through the sewage wetlands. Mountains of liquefaction silt are being piled up near the corner of Breezes Rd and SH74-Anzac Drive".
Bike Ride in the East Side - Photograph 05
Images, UC QuakeStudies
Trucks and diggers build large piles of liquefaction silt. One pile has been covered with plastic sheeting, weighted down with tyres. In the foreground can be seen the Bromley sewage treatment ponds. The photographer comments, "Looking NW from the causeway through the sewage wetlands. Mountains of liquefaction silt are being piled up near the corner of Breezes Rd and SH74-Anzac Drive".
22 February Earthquake - Photograph 52
Images, UC QuakeStudies
Part of the forecourt at the Shell Shirley petrol station has lifted above the rest, after the underground petrol tanks were pushed upwards by liquefaction. Liquefaction silt covers the lower part of the forecourt.
22 February Earthquake - Photograph 06
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, "Liquefaction in River Rd. This is minor compared to many streets in town".
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.
22 February Earthquake - Photograph 53
Images, UC QuakeStudies
Part of the forecourt at the Shell Shirley petrol station has lifted above the rest, after the underground petrol tanks were pushed upwards by liquefaction. Liquefaction silt covers the lower part of the forecourt. The photographer comments, "Tanks at Shell Shirley floated out of the ground".
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".
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".
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".
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.
Banks Avenue, Richmond - Photograph 21
Images, UC QuakeStudies
A pile of liquefaction silt on Medway Street is cordoned off with road cones. The photographer comments, "Piles of sand and subsiding roads at the intersection of Medway St with Woodchester Ave and Flesher Ave, 10 days after the February quake".
22 February Earthquake - Photograph 03
Images, UC QuakeStudies
Damage to Medway Street in Richmond. The road surface is cracked and buckled, and covered in liquefaction silt. A temporary road sign restricting speed to 30 is visible, with road cones behind. The photographer comments, "Medway St, Woodchester Ave on right just beyond the 30 sign".
22 February Earthquake - Photograph 11
Images, UC QuakeStudies
Trees alongside the Avon River in Richmond. The river level is high, and the water is grey with silt. One of the trees is leaning towards the river. The photographer comments, "High river levels because of liquefaction in the Avon. Near 373 River Rd, Richmond".
22 February Earthquake - Photograph 04
Images, UC QuakeStudies
Damage to Medway Street in Richmond. The road surface is cracked and buckled, and covered in liquefaction silt. A temporary road sign restricting speed to 30 is visible, with road cones behind. The photographer comments, "Medway St, between Woodchester Ave and River Rd. Woodchester Ave on right just beyond the 30 sign".
22 February Earthquake - Photograph 26
Images, UC QuakeStudies
Damage to the garden of a house in Richmond. Liquefaction is visible among the plants and on the driveway. The photographer comments, "These photos show our old house in River Rd and recovery work around Richmond and St Albans. Back lawn under 10cm of water and silt".
22 February Earthquake - Photograph 31
Images, UC QuakeStudies
Water and liquefaction flows into the Avon River in Richmond. The water level is very high, and the water is cloudy with silt. The photographer comments, "Water from Dudley Creek took a shortcut across the road into the Avon. It doesn't have much of a drop from the road to the river".
22 February Earthquake - Photograph 07
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. Two people in gumboots walk towards a barrier erected across the road using road cones and warning tape, and in the background the badly twisted Medway Street bridge can be seen. The photographer comments, "Longitudinal cracks indicate lateral movement as the land sagged towards the river. Near 373 River Rd, looking south-east towards Medway St. The Medway St bridge is visible in the background".
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