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- dc.title
- Residential Ground Improvement: Findings from trials to manage liquefaction vulnerability
- dc.description
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The Canterbury Earthquake Sequence of 2010-2011 triggered widespread liquefaction. In some areas this resulted in consequential land and building damage.
The Ground Improvement Programme is an EQC-led research programme which informs more affordable and practical ways of making residential land less vulnerable to liquefaction. This report summarises the lessons from the Ground Improvement Programme.
- Creator(s)
- Earthquake Commission (EQC)
- Tags
- Built Environment, Natural Environment, Understanding the Recovery Context, Science
- dc.title
- Liquefaction-related land damage
- dc.description
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The Canterbury Earthquake Sequence of 2010-2011 triggered widespread liquefaction and land damage throughout the region.
Land damage varied across the region with severity influenced by two main factors - earthquake magnitude and the level of shaking. The topography, seasonal groundwater levels, proximity to rivers and streams, land use and subsurface soil conditions also played a major part in the distribution of liquefaction-induced land damage.
- Creator(s)
- Earthquake Commission (EQC)
- Tags
- Built Environment, Natural Environment, Understanding the Recovery Context, Science
- dc.title
- Localised ground surface changes
- dc.description
- Liquefaction of underlying soil layers can cause slumping of elevated areas displacing the liquefied soils sideways. In addition to the liquefaction related subsidence, this slumping increases the risk of damage to the built environment.
- Creator(s)
- Earthquake Commission (EQC)
- Tags
- Built Environment, Natural Environment, Understanding the Recovery Context, Science
- dc.title
- Lateral spreading
- dc.description
- Horizontal ground movements related to liquefaction occurred across greater Christchurch following the 2010-2011 Canterbury Earthquake Sequence. Information including aerial LiDAR and aerial photograph imagery helped evaluate the extent and magnitude of horizontal movement caused by the earthquakes.
- Creator(s)
- Earthquake Commission (EQC)
- Tags
- Built Environment, Natural Environment, Understanding the Recovery Context, Science
- dc.title
- Paleoliquefaction
- dc.description
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Paleoliquefaction is the preserved evidence of liquefaction in the soil profile attributed to seismic events occurring before earthquake records began.
Following the 2010-2011 Canterbury Earthquake Sequence, paleoliquefaction evidence in shallow (1-2m depth) trenches was documented in several suburbs in eastern Christchurch.
- Creator(s)
- Earthquake Commission (EQC)
- Tags
- Built Environment, Natural Environment, Understanding the Recovery Context, Science
- dc.title
- Foundation damage
- dc.description
- Geotechnical engineers have inspected more than 60,000 residential properties for possible liquefaction-induced land damage after the 2010-2011 Canterbury Earthquake Sequence.
- Creator(s)
- Earthquake Commission (EQC)
- Tags
- Built Environment, Natural Environment, Understanding the Recovery Context, Science