Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
MICP Treatment to Mitigate Soil Liquefaction-Induced Building Settlements
Soil liquefaction beneath structures can produce excessive settlement and loss of foundation bearing capacity, compromising structure performance and safety. Microbial-induced calcium carbonate precipitation (MICP) is a natural and sustainable method to improve the shear modulus and shear strength of soils. Recent centrifuge and laboratory studies have quantified how MICP treatment improves resistance to liquefaction triggering. However, the system-level performance of foundations, specifically the mitigation of liquefaction-induced settlements, underlain with MICP treated soil requires investigation. A centrifuge test was performed at the Center for Geotechnical Modeling at UC Davis using the 9-m radius centrifuge. A building foundation system was modeled by placing 18 foundation pairs at different sections of the model, which included an untreated (UT) zone, an MICP treated zone to 6 m depth (TR6), and an MICP treated zone to 13 m depth (TR13). The model was subjected to sinusoidal shaking events, with the peak base acceleration increasing from 0.03g to 0.5g over five shaking events. Measurements during shaking included accelerations, pore pressures, shear wave velocities, and surface settlements. The MICP treatment reduced the settlement, with the deeper treatment being more effective.
MICP Treatment to Mitigate Soil Liquefaction-Induced Building Settlements
Soil liquefaction beneath structures can produce excessive settlement and loss of foundation bearing capacity, compromising structure performance and safety. Microbial-induced calcium carbonate precipitation (MICP) is a natural and sustainable method to improve the shear modulus and shear strength of soils. Recent centrifuge and laboratory studies have quantified how MICP treatment improves resistance to liquefaction triggering. However, the system-level performance of foundations, specifically the mitigation of liquefaction-induced settlements, underlain with MICP treated soil requires investigation. A centrifuge test was performed at the Center for Geotechnical Modeling at UC Davis using the 9-m radius centrifuge. A building foundation system was modeled by placing 18 foundation pairs at different sections of the model, which included an untreated (UT) zone, an MICP treated zone to 6 m depth (TR6), and an MICP treated zone to 13 m depth (TR13). The model was subjected to sinusoidal shaking events, with the peak base acceleration increasing from 0.03g to 0.5g over five shaking events. Measurements during shaking included accelerations, pore pressures, shear wave velocities, and surface settlements. The MICP treatment reduced the settlement, with the deeper treatment being more effective.
MICP Treatment to Mitigate Soil Liquefaction-Induced Building Settlements
Zamani, Atefeh (Autor:in) / Xiao, Peng (Autor:in) / DeJong, Jason T. (Autor:in) / Boulanger, Ross W. (Autor:in) / Wilson, Daniel W. (Autor:in) / Carey, Trevor J. (Autor:in)
International Foundations Congress and Equipment Expo 2021 ; 2021 ; Dallas, Texas
IFCEE 2021 ; 308-317
06.05.2021
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
MICP Treatment to Mitigate Soil Liquefaction-Induced Building Settlements
| British Library Conference Proceedings | 2021
Simplified Evaluation of Liquefaction-Induced Building Settlements
| British Library Conference Proceedings | 2018