Liquefaction Risk Potential of Road Foundation in the Gold Coast Region, Australia


Nasim Mosavat

PhD student Griffith School of Engineering, Griffith University, Australia

Dr Erwin Oh

Lecturer Griffith School of Engineering, Griffith University, Australia

Dr Gary Chai

Senior Research Fellow Centre for Infrastructure Engineering & Management, Griffith University, Australia



Soil liquefaction is a major concern for infrastructures constructed on saturated cohesionless soils in the event of an earthquake. This paper examines the liquefaction potential of the road foundations in twenty sites located in Gold Coast of South East Queensland. The preliminary seismic analysis was carried out in accordance with Seed and Idriss (1971) simplified procedure by using the in-situ SPT data. The factors of safety (FS) was calculated for three different moment magnitudes of Mw = 3, 4 and 5, and the analysis was used to generate the Liquefaction Potential Index (IL) and Liquefaction Risk Index (IR) values for all sites. The calculated indexes are used to delineate the liquefaction resistance of the road foundations. The study shows that all cases were found to have low liquefaction failure potential for the moment magnitudes considered in the study.

Keywords: liquefaction; SPT testing, Liquefaction Potential Index, Liquefaction Risk Index, failure

Get the entire paper (pdf)    Go back to the TOC