Ground improvement technique to mitigate earthquake-induced liquefaction for structures resting on pile foundations.

Abstract

In the present paper, we evaluate the liquefaction potential of a selected site using standard penetration test results available for the site and investigate the effectiveness of engineering measure by way of ground improvement technique adopted to mitigate earthquake-induced liquefaction in soil. The various field tests of soils and field testing through pile load test carried out to examine the improvement in soil properties are discussed. It is observed there is an appreciable improvement of liquefaction resistance of soil using cement based grouting measures for the selected soil site. The analysis results show that there is significant reduction in vertical settlement (55%) as well as lateral top deflection (65%) of the pile in post-grout scenario when compared to those of pre-grout scenario.