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Numerical Investigation of Microbial-Induced Cemented Sand Mechanical Behavior
Microbial-induced carbonate precipitation (MICP) has been proven to be an effective method to stabilize problem soils using natural biological processes. Previous triaxial tests show the stiffness and strength of loose sand can be increased significantly by bio-cementation under drained and undrained conditions. Modeling using the discrete element method (DEM) provides a means to evaluate the micromechanics of sands and bond structure degradation during shearing, which are not easily captured in physical experiments. After calibrating with stress-strain behavior observed from microbial-induced cemented sands in physical tests, a numerical model is used to explore the mechanical response of microbial-induced cemented sands under varying loading and unloading stress paths.
Numerical Investigation of Microbial-Induced Cemented Sand Mechanical Behavior
Microbial-induced carbonate precipitation (MICP) has been proven to be an effective method to stabilize problem soils using natural biological processes. Previous triaxial tests show the stiffness and strength of loose sand can be increased significantly by bio-cementation under drained and undrained conditions. Modeling using the discrete element method (DEM) provides a means to evaluate the micromechanics of sands and bond structure degradation during shearing, which are not easily captured in physical experiments. After calibrating with stress-strain behavior observed from microbial-induced cemented sands in physical tests, a numerical model is used to explore the mechanical response of microbial-induced cemented sands under varying loading and unloading stress paths.
Numerical Investigation of Microbial-Induced Cemented Sand Mechanical Behavior
Feng, K. (author) / Montoya, B. M. (author) / Evans, T. M. (author)
Geo-Congress 2014 ; 2014 ; Atlanta, Georgia
Geo-Congress 2014 Technical Papers ; 1644-1653
2014-02-24
Conference paper
Electronic Resource
English
Numerical Investigation of Microbial Induced Cemented Sand Mechanical Behavior
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