Foundations on Deep Alluvial Soils
This report prepared by Associate Professor Misko Cubrinovski of the University of Canterbury and Ian McCahon of Geotech Consulting Ltd discusses the nature of the soils in the Christchurch CBD, and their susceptibility to liquefaction.
It describes the effect of liquefaction in the Canterbury earthquakes on CBD buildings of different foundation types, identifies foundation types and land improvement measures suitable for buildings on deep alluvial soils, and discusses the importance of appropriate field investigations and the need for a holistic design approach that takes into account soil conditions, and foundation and structure systems. The report commences with a short Executive Summary.
Owing to its large size, the report has been broken into the following segments:
Title and authors; executive summary; introduction; chapter 2 general characteristics of seismic response of deep alluvial soils.
Chapter 3 Christchurch CBD soils.
Chapter 4 Observed liquefaction and response spectra in CBD during the 2010 and 2011 Christchurch earthquakes.
Chapter 5 Typical causes of failure in the CBD; chapter 6 comparison of extent of liquefaction
between 2010-2011 earthquakes and a Mw = 8.0, alpine fault event.
Chapter 7 typical methods of founding buildings which would avoid such failures; chapter 8 conclusions; acknowledgements; references.
Submissions must be received by 7 October 2011.