
In the aftermath of the 22 February 2011 earthquake, the Natural Hazards Research Platform (NHRP) initiated a series of Short Term Recovery Projects (STRP) aimed at facilitating and supporting the recovery of Christchurch from the earthquake impacts. This report presents the outcomes of STRP 6: Impacts of Liquefaction on Pipe Networks, which focused on the impacts of liquefaction on the potable water and wastewater systems of Christchurch. The project was a collaborative effort of NHRP researchers with expertise in liquefaction, CCC personnel managing and designing the systems and a geotechnical practitioner with experience/expertise in Christchurch soils and seismic geotechnics.
Members of the Student Volunteer Army carting liquefaction in wheelbarrows out of a resident's property in Avonside. The liquefaction will be transported to the street and left in piles for the City Council to pick up.
Damage to Christchurch city following the 22 February earthquake 2011. A car sits in a hole created by liquefaction on Ferry Road. Piles of silt can be seen around the car.
Labour Party leader Phil Goff speaking to members of the Student Volunteer Army as they assemble wheelbarrows in the USCA car park. The wheelbarrows will be used to clear liquefaction from Christchurch properties.
Labour Party leader Phil Goff speaking to members of the Student Volunteer Army as they assemble wheelbarrows in the USCA car park. The wheelbarrows will be used to clear liquefaction from Christchurch properties.
Students from the University of Canterbury heading back to work after enjoying a barbeque lunch in Burwood Park. The students have volunteered to clear liquefaction from Christchurch properties as part of the Student Volunteer Army.
Students from the University of Canterbury heading back to work after enjoying a barbeque lunch in Burwood Park. The students have volunteered to clear liquefaction from Christchurch properties as part of the Student Volunteer Army.
Students from the University of Canterbury heading back to work after enjoying a barbeque lunch in Burwood Park. The students have volunteered to clear liquefaction from Christchurch properties as part of the Student Volunteer Army.
A panorama of students from the University of Canterbury enjoying a barbeque lunch break in Burwood Park. The students have volunteered to dig up liquefaction as part of the Student Volunteer Army.
Students from the University of Canterbury enjoying a barbeque lunch break in Burwood Park amongst their wheelbarrows and shovels. The students have volunteered to dig up liquefaction as part of the Student Volunteer Army.
Students from the University of Canterbury enjoying a barbeque lunch break in Burwood Park amongst their wheelbarrows and shovels. The students have volunteered to dig up liquefaction as part of the Student Volunteer Army.
Sullivan Park in Avonside. Liquefaction can be seen running across the park. Two signs have slumped towards each other. Blue pipes carrying a temporary water supply to the neighbourhood have been placed across the park.
Students from the University of Canterbury enjoying a barbeque lunch break amongst shovels and gumboots. The students have volunteered to dig up liquefaction as part of the Student Volunteer Army.
Students from the University of Canterbury heading back to work after enjoying a barbeque lunch in Burwood Park. The students have volunteered to clear liquefaction from Christchurch properties as part of the Student Volunteer Army.
Students from the University of Canterbury heading back to work after enjoying a barbeque lunch in Burwood Park. The students have volunteered to clear liquefaction from Christchurch properties as part of the Student Volunteer Army.
Students from the University of Canterbury heading back to work after enjoying a barbeque lunch in Burwood Park. The students have volunteered to clear liquefaction from Christchurch properties as part of the Student Volunteer Army.
Students from the University of Canterbury heading back to work after enjoying a barbeque lunch in Burwood Park. The students have volunteered to clear liquefaction from Christchurch properties as part of the Student Volunteer Army.
A large crack in the ground at Sullivan Park in Avonside which has resulted from the 4 September 2010 earthquake. Remnants of liquefaction silt can be seen around the edges of the crack.
Paradise ducks search for food among 'sand volcanoes' in the Heathcote Estuary. The volcanoes were caused by liquefaction where the soil lost its strength and water erupted out of the hole, taking silt with it.
A photograph captioned by BeckerFraserPhotos, "A view of the estuary which is just behind Seabreeze Close, Bexley. The estuary shows signs of liquefaction with a large number of sand volcanoes appearing".
A photograph captioned by BeckerFraserPhotos, "A driveway leading to a house at Seabreeze Close in Bexley is covered in liquefaction. Weeds have grown through the cracks in the driveway".
A photograph of a silt volcano. Silt volcanoes are caused by liquefaction, when the soil loses its strength during the earthquake and the silt rises upwards, ejecting out of a hole like magma in a volcano.
A photograph captioned by BeckerFraserPhotos, "Keith Hague shows how the house has sunk by the ease at which he can touch the downpipes. Note the heap of liquefaction to the right of the picture".
A large crack in the ground at Sullivan Park in Avonside which has resulted from the 4 September 2010 earthquake. Remnants of liquefaction silt can be seen around the edges of the crack.
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".
A photograph of a sign outside a property in Christchurch. The sign reads, "Thanks for helping our city". Sandcastles have been made out of liquefaction silt on the footpath in front of the sign.
A photograph two members of the public looking at liquefaction on Dundas Street shortly after the 22 February 2011 earthquake. In the distance a police car is parked underneath the earthquake damaged Smiths City car park.
Students from the University of Canterbury heading back to work after enjoying a barbeque lunch in Burwood Park. The students have volunteered to clear liquefaction from Christchurch properties as part of the Student Volunteer Army.
Photograph captioned by BeckerFraserPhotos, "Waygreen Avenue in New Brighton. This residential street was badly impacted by liquefaction and is now red zoned. Stagnant water still rests in several places in the street".
A photograph of cracks in Gayhurst Road near the intersection with Glenarm Terrace. Liquefaction can be seen on the street, and there is a road cone on a crack in the footpath.