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Images for foundations; more images...

Images, eqnz.chch.2010

A sight becoming more common in post-earthquake Christchurch - lifting earthquake-affected buildings to allow their foundations to be replaced and or completely replaced.

Research papers, University of Canterbury Library

The Mw 6.2 February 22nd 2011 Christchurch earthquake (and others in the 2010-2011 Canterbury sequence) provided a unique opportunity to study the devastating effects of earthquakes first-hand and learn from them for future engineering applications. All major events in the Canterbury earthquake sequence caused widespread liquefaction throughout Christchurch’s eastern suburbs, particularly extensive and severe during the February 22nd event. Along large stretches of the Avon River banks (and to a lesser extent along the Heathcote) significant lateral spreading occurred, affecting bridges and the infrastructure they support. The first stage of this research involved conducting detailed field reconnaissance to document liquefaction and lateral spreading-induced damage to several case study bridges along the Avon River. The case study bridges cover a range of ages and construction types but all are reinforced concrete structures which have relatively short, stiff decks. These factors combined led to a characteristic deformation mechanism involving deck-pinning and abutment back-rotation with consequent damage to the abutment piles and slumping of the approaches. The second stage of the research involved using pseudo-static analysis, a simplified seismic modelling tool, to analyse two of the bridges. An advantage of pseudo-static analysis over more complicated modelling methods is that it uses conventional geotechnical data in its inputs, such as SPT blowcount and CPT cone resistance and local friction. Pseudo-static analysis can also be applied without excessive computational power or specialised knowledge, yet it has been shown to capture the basic mechanisms of pile behaviour. Single pile and whole bridge models were constructed for each bridge, and both cyclic and lateral spreading phases of loading were investigated. Parametric studies were carried out which varied the values of key parameters to identify their influence on pile response, and computed displacements and damages were compared with observations made in the field. It was shown that pseudo-static analysis was able to capture the characteristic damage mechanisms observed in the field, however the treatment of key parameters affecting pile response is of primary importance. Recommendations were made concerning the treatment of these governing parameters controlling pile response. In this way the future application of pseudo-static analysis as a tool for analysing and designing bridge pile foundations in liquefying and laterally spreading soils is enhanced.

Images, Alexander Turnbull Library

Relates to the three new categories for residential foundation design that have been developed and will be required for repairing and rebuilding homes in Canterbury following the earthquakes of 2010 and 2011. The 'zones' referred to in the cartoon are the colours designated to different degrees of damage to particular areas or buildings in Christchurch after the earthquakes. Quantity: 1 digital cartoon(s).

Images, UC QuakeStudies

Part of a stone wall left sticking out over the edge after the cliff below it collapsed. The photographer comments, "A viewing platform in Clifton has its foundations exposed after the cliff face collapsed".

Videos, UC QuakeStudies

A video of Stone Works removing a time capsule from the foundations of the old Press Building in Cathedral Square. The time capsule was found in the foundation stone of the building. It contained a bundle of newspapers from April 1907, handwritten notes, and coins.

Images, eqnz.chch.2010

It's five years since the earthquake, and for the first time I feel a sense that the rebuild is taking effect. 113/115 - Natural Framing. In the middle of the rebuild, wall murals are everywhere is Christchurch. The framing is wire fence around ballet dancer, although there is plenty of evidence of framing/boxing around the foundations.

Audio, Radio New Zealand

The Earthquake Commission (EQC) criticised for misleading and inadequate measurements on housing foundations when assessing damage to Canterbury homes; Wellington historic building champions vow to save heritage structure in the capital; the spread of didymo in Fiordland; Defence Force sentencing today after drowning last year; the censorship of Maniac, arty audiences only please, and; the PM changes tack on working with NZ First.

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Christchurch begins the slow recovery process after last weeks devastating 7.1 earthquake. Laura and Angus Chisholm pictured at their property off Harewood Road. Ironically their property was seriously damaged by a boy racer who careered off the road and smashed through their garden fence and hit the front of the house knocking part of it off its foundations".

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Christchurch begins the slow recovery process after last weeks devastating 7.1 earthquake. Laura and Angus Chisholm pictured at their property off Harewood Road. Ironically their property was seriously damaged by a boy racer who careered off the road and smashed through their garden fence and hit the front of the house knocking part of it off its foundations".

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Christchurch begins the slow recovery process after last weeks devastating 7.1 earthquake. Laura and Angus Chisholm pictured at their property off Harewood Road. Ironically their property was seriously damaged by a boy racer who careered off the road and smashed through their garden fence and hit the front of the house knocking part of it off its foundations".

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Christchurch begins the slow recovery process after last weeks devastating 7.1 earthquake. Laura and Angus Chisholm pictured at their property off Harewood Road. Ironically their property was seriously damaged by a boy racer who careered off the road and smashed through their garden fence and hit the front of the house knocking part of it off its foundations".

Images, UC QuakeStudies

Photograph captioned by Fairfax, "Christchurch begins the slow recovery process after last weeks devastating 7.1 earthquake. Laura and Angus Chisholm pictured at their property off Harewood Road. Ironically their property was seriously damaged by a boy racer who careered off the road and smashed through their garden fence and hit the front of the house knocking part of it off its foundations".

Videos, UC QuakeStudies

A video about the time capsule found in the foundations of the former Press Building in Cathedral Square. Heritage consultant Jenny May shows the contents of the time capsule, including several coins, newspaper articles, and messages. The capsule was left by the architects and the people working on the building, rather than the editors of The Press.

Images, UC QuakeStudies

Workers operate a drilling rig inside a Terra Probe truck, which has been raised on jacks to make it stable. The photographer comments, "Another completely different company testing what is below the surface to determine what type of foundations new houses will need. This is in one the blue/green area of earthquake shaken Christchurch. Strangely this is 3 metres away from where the other testing was done".

Research papers, University of Canterbury Library

This thesis looks at the protocols museums and galleries adopt for the safeguarding of art, artefacts and cultural heritage. In particular, it analyses these procedures in relation to the 2010 and 2011 earthquakes in Christchurch, and considers how these events shaped the preventative conservation measures in place in museum and gallery institutions. Through gathering, assessing, and comparing this information about Christchurch’s institutions to disaster management best practices in national and international organisations, this thesis gauges the extent to which disaster management was changed in response to the events in Christchurch. This thesis first considers the growth in disaster management as a field, before examining what are considered best practices within this sector. Finally, it looks at specific institutions in Christchurch, including the Christchurch Art Gallery Te Puna o Waiwhetu, Canterbury Museum, and the Air Force Museum of New Zealand.

Research papers, University of Canterbury Library

The paper presents preliminary findings from comprehensive research studies on the liquefaction-induced damage to buildings and infrastructure in Christchurch during the 2010-2011 Canterbury earthquakes. It identifies key factors and mechanisms of damage to road bridges, shallow foundations of CBD buildings and buried pipelines, and highlights the implications of the findings for the seismic analysis and design of these structures.

Images, UC QuakeStudies

A badly damaged house in Burwood. Parts of the house have moved in different directions, leaving walls and doors misaligned. The photographer comments, "Although this looks like an extreme wide angle shot it is actually a house tilted in every direction at the same time. The earthquake caused the ground to vibrate and compress so much that the sandy soil liquefied and caused the ground to collapse under this modern home".

Videos, UC QuakeStudies

A video of an interview with Andy Dodd, archaeologist at Underground Overground Archaeology, and Rewi Couch, representative for Te Hapu o Ngai Te Wheke, about the excavation of the site of the former Lyttelton Post Office on Norwich Quay. A Maori adze was found by the archaeologists deep beneath the concrete foundations of the building. The adze is a woodworking tool which indicates that early Maori settlers may have carved and launched waka on the site.

Images, UC QuakeStudies

A digitally manipulated photograph of twisted reinforcing rods amongst the rubble from the demolition of QEII. The photographer comments, "These rarely seen worms live in the pressurised earth under the foundations of buildings. They need a damp soil and be under at least 100 pounds of pressure per square inch. After the destructive force of an earthquake they swiftly rise to the surface through gaps in the rubble. Unfortunately they quickly die and then crystallise as hard as iron in the dry low pressure air".

Videos, UC QuakeStudies

A video of a tour of two completed shops in New Regent Street. Mark Galletly from Galletly Builders talks about the damage caused by the 22 February 2011 earthquake, the work that was done to restore the shops, and the items that archaeologists found on the sites. The items found included the foundations of a nineteenth century ice skating rink, and bowling shoes. The video also includes an interview with shop owners Brian and Betty Hazeldine.

Research papers, University of Canterbury Library

In this paper, we consider how religious leaders and Civil Defence authorities might collaborate to establish a two-way information conduit during the aftermath of a disaster. Using surveys and in-person interviews, clergy in different Christian denominations were asked about their roles in the earthquake, the needs of their congregations and the possibilities and obstacles to deeper collaboration with Civil Defence authorities.

Audio, Radio New Zealand

The former Earthquake Commission minister, Gerry Brownlee, is defending EQC over claims its assessors in Christchurch were not properly qualified. A growing number of homeowners in the city are discovering EQC assessors have completely missed quake damage including broken foundations costing hundreds of thousands to repair. That's been disastrous for people who've bought homes with hidden damage who are sometimes finding private insurers unwilling to cover the cost of putting right mistakes made by EQC. The company hired by EQC to carry out repairs was Fletcher Construction. Its chief executive at the time, Mark Binns, told Checkpoint that EQC probably hired unqualified people to assess quake damaged homes. Gerry Brownlee refused to be drawn on the comments from Mr Binns. But when asked by RNZ Christchurch reporter, Conan Young, if it was acceptable to have retired policemen, school principals and vacuum cleaner salesmen carrying out assessments for EQC, he admitted finding enough people to do the job was a challenge.

Research papers, University of Canterbury Library

The 22 February 2011, Mw6.2 Christchurch earthquake is the most costly earthquake to affect New Zealand, causing an estimated 181 fatalities and severely damaging thousands of residential and commercial buildings. This paper presents a summary of some of the observations made by the NSF-sponsored GEER Team regarding the geotechnical/geologic aspects of this earthquake. The Team focused on documenting the occurrence and severity of liquefaction and lateral spreading, performance of building and bridge foundations, buried pipelines and levees, and significant rockfalls and landslides. Liquefaction was pervasive and caused extensive damage to residential properties, water and wastewater networks, high-rise buildings, and bridges. Entire neighborhoods subsided, resulting in flooding that caused further damage. Additionally, liquefaction and lateral spreading resulted in damage to bridges and to stretches of levees along the Waimakariri and Kaiapoi Rivers. Rockfalls and landslides in the Port Hills damaged several homes and caused several fatalities.

Audio, Radio New Zealand

It was so nearly lost. As the Christ Church Anglican Cathedral is being rebuilt, historian Edmund Bohan is releasing a history of the distinctive Gothic building. It shows it was controversial even before work started on designing it, let alone building in. From the laying of the foundations to the official opening, it took 40 years, after squabbles over pretty much every aspect of its construction - not to mention the huge problems raising the money to build it in the City Centre. In Heart of the City: The Story of Christchurch's Controversial Cathedral, Edmund is critical of the former Anglican Bishop Victoria Matthews' determination to demolish the badly-damaged cathedral after the Canterbury earthquakes, to replace it with a modern church. And he tells Lynn Freeman he's very much looking forward to seeing the Cathedral restored to its former glory after a lengthy and pricey rebuild. But first he sets the scene. Back in the 1860s, there was controversy over where the cathedral should go, its design, whether it should be in stone or timber - even if there should be a cathedral built at all! Heart of the City: The Story of Christchurch's Controversial Cathedral, by Edmund Bohan is published by Quentin Wilson Publishing.