A photograph of damaged land near River Road in Lincoln.
A photograph of damaged land near River Road in Lincoln.
A video of a dug-out soil pit on a farm near River Road in Lincoln. There is a thick layer of saturated sand between the topsoil and the subsoil where the grass roots end. The saturated soil is collapsing as a result of contractor Tony Fisher, of Fisher Agriculture Ltd, having jumped lightly up and down on the edge of the pit.
A video of a dug-out soil pit on a farm near River Road in Lincoln. There is a thick layer of saturated sand between the topsoil and the subsoil where the grass roots end. The saturated soil is collapsing as a result of contractor Tony Fisher, of Fisher Agriculture Ltd, jumping lightly up and down on the edge of the pit.
A video of a tractor on a farm near River Road in Lincoln. The tractor is pulling a power harrow over a liquefaction blister. This was one of several soil-remediation techniques tested on farms affected by the 4 September 2010 earthquake.
A video of contractor Tony Fisher, of Fisher Agricultural Ltd, jumping lightly up and down on the edge of a dug-out soil pit on a farm near River Road in Lincoln. There is a thick layer of saturated sand between the topsoil and the subsoil where the grass roots end. The saturated soil starts to collapse as a result of the movement.
A photograph of a rotary hoe being used to remediate a large sand volcano on a farm near River Road in Lincoln.
A photograph of a tractor with a rotary hoe flattening a liquefaction blister on a farm near River Road in Lincoln.
A photograph of a dug-out soil pit on a farm near River Road in Lincoln, showing saturated sand between the topsoil and the subsoil where the grass roots end.
A close-up video of liquefied soil on a farm near River Road in Lincoln. Contractor Tony Fisher, of Fisher Agricultural Ltd, is jumping lightly up and down to demonstrate the soil's jelly-like structure.
A photograph of a dug-out soil pit on a farm near River Road in Lincoln, showing saturated sand between the topsoil and the subsoil where the grass roots end.
A photograph of a dug-out soil pit on a farm near River Road in Lincoln, showing saturated sand between the topsoil and the subsoil where the grass roots end.
A photograph of a dug-out soil pit on a farm near River Road in Lincoln, showing saturated sand between the topsoil and the subsoil where the grass roots end.
A photograph of damaged land near River Road in Lincoln.
A photograph of liquefaction emerging from freshly-harrowed soil on a farm near River Road in Lincoln.
A photograph of a rotary hoe being used during soil remediation experiments on a farm near River Road in Lincoln.
A photograph of a tractor on a farm near River Road in Lincoln, ready to drive a power harrow over a liquefaction blister.
A video of a tractor on a farm near River Road in Lincoln. The tractor is making a several passes over a sand volcano with a rotary hoe. This was one of several soil-remediation techniques tested on farms affected by the 4 September 2010 earthquake.
A photograph of the remains of a liquefaction blister that has been flattened with a rotary hoe on a farm near River Road in Lincoln.
A photograph of the remains of a liquefaction blister on a farm near River Road in Lincoln.
A photograph of freshly-harrowed soil on a farm near River Road in Lincoln.
A photograph of a dug-out soil pit on a farm near River Road in Lincoln, showing saturated sand between the topsoil and the subsoil where the grass roots end.
A video of a tractor on a farm near River Road in Lincoln. The tractor is passing over a large sand volcano with a power harrow. This was one of several soil-remediation techniques tested on farms affected by the 4 September 2010 earthquake.
A photograph of a rotary hoe being used during soil remediation experiments on a farm near River Road in Lincoln.
A photograph of Peter Almond (wearing high visibility jacket) and Derrick Moot inspecting a dug-out soil pit on a farm near River Road in Lincoln.
A photograph of freshly-harrowed soil on a farm near River Road in Lincoln.
A document which explains the pre-approval process for specialist lining contractors working on the SCIRT horizontal repair programme.This document has had sections removed and redacted to protect contractors' commercial interests.For a current list of approved contractors authorised to carry out lining works on Christchurch City Council assets, contact the Council.
A document which specifies the technical requirements for the rehabilitation and repair of pipes using lining methodologies during the SCIRT programme of work.
Seismic retrofitting of unreinforced masonry buildings using posttensioning has been the topic of many recent experimental research projects. However, the performance of such retrofit designs in actual design level earthquakes has previously been poorly documented. In 1984 two stone masonry buildings within The Arts Centre of Christchurch received posttensioned seismic retrofits, which were subsequently subjected to design level seismic loads during the 2010/2011 Canterbury earthquake sequence. These 26 year old retrofits were part of a global scheme to strengthen and secure the historic building complex and were subject to considerable budgetary constraints. Given the limited resources available at the time of construction and the current degraded state of the steel posttension tendons, the posttensioned retrofits performed well in preventing major damage to the overall structure of the two buildings in the Canterbury earthquakes. When compared to other similar unretrofitted structures within The Arts Centre, it is demonstrated that the posttensioning significantly improved the in-plane and out-of-plane wall strength and the ability to limit residual wall displacements. The history of The Arts Centre buildings and the details of the Canterbury earthquakes is discussed, followed by examination of the performance of the posttension retrofits and the suitability of this technique for future retrofitting of other historic unreinforced masonry buildings. http://www.aees.org.au/downloads/conference-papers/
An earthquake memories story from Sue Gillan, Personal Assistant to General Manager Older Person's, Orthopaedics and Rehabilitation, The Princess Margaret Hospital, titled, "All hands on deck".