Geotechnical Earthquake Engineering and Soil Dynamics V
Lateral Spreading Characteristics from the 2011 Christchurch, New Zealand, Earthquake
Publication: Geotechnical Earthquake Engineering and Soil Dynamics V: Liquefaction Triggering, Consequences, and Mitigation (GSP 290)
ABSTRACT
Liquefaction-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 two 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 semi-empirical displacement models tended to under estimate the displacements at one site, but better predicted displacements at the other. 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.
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ACKNOWLEDGMENTS
This material is based upon work supported by the National Science Foundation under Grant No. CMMI-1462855. This support is gratefully acknowledged.
REFERENCES
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Information & Authors
Information
Published In
Geotechnical Earthquake Engineering and Soil Dynamics V: Liquefaction Triggering, Consequences, and Mitigation (GSP 290)
Pages: 337 - 347
Editors: Scott J. Brandenberg, Ph.D., University of California, Los Angeles, and Majid T. Manzari, Ph.D., George Washington University
ISBN (Online): 978-0-7844-8145-5
Copyright
© 2018 American Society of Civil Engineers.
History
Published online: Jun 7, 2018
ASCE Technical Topics:
- Continuum mechanics
- Displacement (mechanics)
- Earthquake engineering
- Earthquake resistant structures
- Earthquakes
- Engineering mechanics
- Geohazards
- Geology
- Geomechanics
- Geotechnical data
- Geotechnical engineering
- Geotechnical investigation
- Soil liquefaction
- Soil mechanics
- Soil properties
- Solid mechanics
- Structural mechanics
- Subsurface investigation
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