Assessment of Empirical Lateral Spreading Displacement Models using Data from the 2011 Christchurch Earthquake

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dc.contributor.authorLittle, Michael
dc.contributor.authorRathje, Ellen
dc.contributor.authorDe Pascale, Gregory
dc.contributor.authorBachhuber, Jeffrey
dc.date.accessioned2019-09-19T02:15:27Z
dc.date.available2019-09-19T02:15:27Z
dc.date.issued2019en
dc.description.abstractLiquefaction-induced lateral spreading during the 2011 Christchurch earthquake in New Zealand was severe and extensive, and data regarding the displacements associated with the lateral spreading provides an excellent opportunity to better understand the factors that influence these movements. Horizontal displacements measured from optical satellite imagery and subsurface data from the New Zealand Geotechnical Database (NZGD) were used to investigate four distinct lateral spread areas along the Avon River in Christchurch. These areas experienced displacements between 0.5 and 2 m, with the inland extent of displacement ranging from 100 m to over 600 m. Existing empirical and semi-empirical displacement models tend to under estimate displacements at some sites and over estimate at others. The integrated datasets indicate that the areas with more severe and spatially extensive displacements are associated with thicker and more laterally continuous deposits of liquefiable soil. In some areas, the inland extent of displacements is constrained by geologic boundaries and geomorphic features, as expressed by distinct topographic breaks. In other areas the extent of displacement is influenced by the continuity of liquefiable strata or by the presence of layers that may act as vertical seepage barriers. These observations demonstrate the need to integrate geologic/geomorphic analyses with geotechnical analyses when assessing the potential for lateral spreading movements.en
dc.identifier.urihttp://hdl.handle.net/10092/17181
dc.language.isoen
dc.rightsCC-BY 4.0 Internationalen
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/legalcode
dc.titleAssessment of Empirical Lateral Spreading Displacement Models using Data from the 2011 Christchurch Earthquakeen
dc.typeConference Contributions - Otheren
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