Details
| Original language | English |
|---|---|
| Pages (from-to) | 4537-4553 |
| Number of pages | 17 |
| Journal | Acta geotechnica |
| Volume | 17 |
| Issue number | 10 |
| Early online date | 4 Apr 2022 |
| Publication status | Published - Oct 2022 |
Abstract
A coupled bio-chemo-hydro-mechanical model (BCHM) is developed to investigate the permeability reduction and stiffness improvement in soil by microbially induced calcite precipitation (MICP). Specifically, in our model based on the geometric method a link between the micro- and macroscopic features is generated. This allows the model to capture the macroscopic material property changes caused by variations in the microstructure during MICP. The developed model was calibrated and validated with the experimental data from different literature sources. Besides, the model was applied in a scenario simulation to predict the hydro-mechanical response of MICP-soil under continuous biochemical, hydraulic and mechanical treatments. Our modelling study indicates that for a reasonable prediction of the permeability reduction and stiffness improvement by MICP in both space and time, the coupled BCHM processes and the influences from the microstructural aspects should be considered. Due to its capability to capture the dynamic BCHM interactions in flexible settings, this model could potentially be adopted as a designing tool for real MICP applications.
Keywords
- BCHM modelling, Cross-scale, MICP, Micro-properties, Permeability reduction, Stiffness improvement
ASJC Scopus subject areas
- Earth and Planetary Sciences(all)
- Geotechnical Engineering and Engineering Geology
- Earth and Planetary Sciences(all)
- Earth and Planetary Sciences (miscellaneous)
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In: Acta geotechnica, Vol. 17, No. 10, 10.2022, p. 4537-4553.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Micro-feature-motivated numerical analysis of the coupled bio-chemo-hydro-mechanical behaviour in MICP
AU - Wang, Xuerui
AU - Nackenhorst, Udo
N1 - Funding Information: This research was funded by the German Research Foundation (DFG) (Grant No. NA 330/20-1).
PY - 2022/10
Y1 - 2022/10
N2 - A coupled bio-chemo-hydro-mechanical model (BCHM) is developed to investigate the permeability reduction and stiffness improvement in soil by microbially induced calcite precipitation (MICP). Specifically, in our model based on the geometric method a link between the micro- and macroscopic features is generated. This allows the model to capture the macroscopic material property changes caused by variations in the microstructure during MICP. The developed model was calibrated and validated with the experimental data from different literature sources. Besides, the model was applied in a scenario simulation to predict the hydro-mechanical response of MICP-soil under continuous biochemical, hydraulic and mechanical treatments. Our modelling study indicates that for a reasonable prediction of the permeability reduction and stiffness improvement by MICP in both space and time, the coupled BCHM processes and the influences from the microstructural aspects should be considered. Due to its capability to capture the dynamic BCHM interactions in flexible settings, this model could potentially be adopted as a designing tool for real MICP applications.
AB - A coupled bio-chemo-hydro-mechanical model (BCHM) is developed to investigate the permeability reduction and stiffness improvement in soil by microbially induced calcite precipitation (MICP). Specifically, in our model based on the geometric method a link between the micro- and macroscopic features is generated. This allows the model to capture the macroscopic material property changes caused by variations in the microstructure during MICP. The developed model was calibrated and validated with the experimental data from different literature sources. Besides, the model was applied in a scenario simulation to predict the hydro-mechanical response of MICP-soil under continuous biochemical, hydraulic and mechanical treatments. Our modelling study indicates that for a reasonable prediction of the permeability reduction and stiffness improvement by MICP in both space and time, the coupled BCHM processes and the influences from the microstructural aspects should be considered. Due to its capability to capture the dynamic BCHM interactions in flexible settings, this model could potentially be adopted as a designing tool for real MICP applications.
KW - BCHM modelling
KW - Cross-scale
KW - MICP
KW - Micro-properties
KW - Permeability reduction
KW - Stiffness improvement
UR - http://www.scopus.com/inward/record.url?scp=85127538075&partnerID=8YFLogxK
U2 - 10.1007/s11440-022-01544-2
DO - 10.1007/s11440-022-01544-2
M3 - Article
AN - SCOPUS:85127538075
VL - 17
SP - 4537
EP - 4553
JO - Acta geotechnica
JF - Acta geotechnica
SN - 1861-1125
IS - 10
ER -