This paper presents a case study of soil treatment carried out to mitigate liquefaction potential of the site for a Sewage Treatment Plant at Tunasan, Muntinlupa City, Philippines. The assessment was carried out using LiquefyPro software to determine the liquefaction potential and estimated settlement of soil deposit due to seismic loads of PGA 0.71g. Design approach using Baez (Advances in the Design of Vibro Systems for the Improvement of Liquefaction Resistance) was followed using the stress concentration criteria to eventually co-relate to a new factor of safety for the improved site with jet grouted columns. After installation, using high pressure jet injection system, cores were taken to evaluate the diameter formed and the compressive strength of the soil cement columns to validate the design.
Subjects: Liquefaction, Ground improvement, Jet Grout columns
Author: Jibi C. Yohannan, Viswanathan N. and Miguel Dimadura
Publisher: DFI