Article accepted for publication
Title: Seismic Resilience of Foundations in Liquefiable Soils Stabilized with Microbial-Induced Carbonate Precipitation (MICP)
Author: Xhunitya Yane
Abstract: Soil liquefaction during seismic events poses a severe threat to shallow foundations, often leading to excessive settlement, tilting, and structural collapse. Conventional ground improvement techniques, such as chemical grouting and deep dynamic compaction, are costly and environmentally disruptive. This study evaluates the seismic performance of shallow foundations resting on liquefiable sandy soils treated with Microbial-Induced Carbonate Precipitation (MICP). The research utilizes Sporosarcina pasteurii bacteria injected into loose, saturated sand models to induce calcium carbonate precipitation, thereby binding soil particles and increasing shear strength. Shake table testing is conducted on scaled shallow foundation models to simulate high-intensity earthquake loading. Sensor arrays measure pore water pressure generation, ground accelerations, and structural settlement across varying levels of MICP treatment density.The experimental data reveals that MICP treatment reduces liquefaction-induced foundation settlement by up to 78% compared to untreated loose sand.
Keywords: Bio-geotechnology, Soil liquefaction, Microbial-Induced Carbonate Precipitation, Shake table testing, Foundation settlement, Seismic mitigation