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contributor authorDiane M. Moug
contributor authorKayla R. Sorenson
contributor authorArash Khosravifar
contributor authorMelissa Preciado
contributor authorElizabeth Stallings Young
contributor authorLeon van Paassen
contributor authorEdward Kavazanjian
contributor authorBenchen Zhang
contributor authorKenneth H. Stokoe
contributor authorFarnyuh M. Menq
contributor authorYumei Wang
date accessioned2022-12-27T20:37:35Z
date available2022-12-27T20:37:35Z
date issued2022/11/01
identifier other(ASCE)GT.1943-5606.0002890.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4287676
description abstractField trials of microbially induced desaturation (MID) were conducted at two sites in Portland, Oregon underlain by liquefiable fine-grained soils. MID is an emerging method for mitigating the potential for triggering liquefaction. MID treatment stimulates native denitrifying microbes with a solution containing nitrate, as well as other substrates and nutrients. An end product of the denitrification reactions is nitrogen gas, which displaces soil porewater and in turn reduces the in situ degree of saturation (Sr). Because during cyclic loading desaturated soils produce less excess porewater pressure than saturated soils, MID can mitigate the potential for triggering liquefaction. Monitoring for the two field trials was performed to evaluate the MID treatment performance and the associated subsurface desaturation. Monitoring data included seismic wave velocities measured with crosshole and downhole techniques, embedded in situ moisture and electrical conductivity sensors, water chemistry measurements, and recovery and testing of samples for changes in soil properties. Monitoring data were collected pretreatment, during treatment, and post-treatment, and then interpreted to evaluate the effectiveness of MID for reducing Sr in fine grained, low plasticity silts in the two distinct sites. Despite geotechnical site characterization data that show the field trial sites have distinct geotechnical characteristics, including interbedding, that affect liquefaction susceptibility and MID treatment application, results indicate liquefiable soil at both sites was successfully desaturated and that the desaturation persisted for at least 92 days post-treatment.
publisherASCE
titleField Trials of Microbially Induced Desaturation in Low-Plasticity Silt
typeJournal Article
journal volume148
journal issue11
journal titleJournal of Geotechnical and Geoenvironmental Engineering
identifier doi10.1061/(ASCE)GT.1943-5606.0002890
journal fristpage05022005
journal lastpage05022005_19
page19
treeJournal of Geotechnical and Geoenvironmental Engineering:;2022:;Volume ( 148 ):;issue: 011
contenttypeFulltext


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