E3S Web Conf.
Volume 195, 20204th European Conference on Unsaturated Soils (E-UNSAT 2020)
|Number of page(s)
|Special Session on Biocementation
|16 October 2020
Unsaturated Fluid Flow through Granular Soils Treated with Microbial Induced Desaturation and Precipitation
Department of Civil, Environmental and Sustainable Engineering, Arizona State University, Tempe, AZ 85287, USA
* Corresponding author: email@example.com
The use of microorganisms to induce desaturation of granular soils via denitrification results in nitrogen and carbon dioxide gas generation, which in turn lowers the degree of saturation of the soil matrix. Given sufficient substrates, the stimulated bacteria will produce enough gas to develop a continuous gas phase. Introducing gas into the soil to reduce the degree of saturation is shown to increase the soil resistance to dynamic loading and helps to mitigate liquefaction. The impact of desaturation on liquefaction hazard mitigation has comparative value to the calcite precipitation phase of the process. Meso-scale tests have been performed on a relatively thin tank of soil to simulate planar flow through a granular soil treated with MIDP.
© The Authors, published by EDP Sciences 2020
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