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Updated: Jun 29, 2025
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Sandy Soil Improvement through Microbially Induced Calcite Precipitation MICP by Immersion
Published on: September 12, 2019
9.4K
Numerical analysis of MICP treated sand based on bio-chemo-hydro model
Delong Li1, Shengzhe Chen1, Xing Gao1
1Yantai Yuhuangding Hospital, Yantai, China.
Frontiers in Bioengineering and Biotechnology
|April 8, 2024
Summary
Microbially Induced Calcite Precipitation (MICP) enhances soil grouting. Higher bacterial concentration and grouting frequency improve effectiveness, while cementation concentration has minimal impact.
Area of Science:
- Geotechnical Engineering
- Environmental Science
- Microbiology
Background:
- Microbially Induced Calcite Precipitation (MICP) is a sustainable soil grouting method.
- Experimental investigation of MICP factors is complex due to intricate biochemical processes.
Purpose of the Study:
- To develop and validate a 3D numerical model for predicting bio-grouting permeability in porous media.
- To analyze the influence of key parameters on MICP grouting effectiveness.
Main Methods:
- A validated three-dimensional numerical model was employed.
- The model simulated the effects of varying bacterial concentration, cementation concentration, grouting rate, and grouting time.
Main Results:
- Grouting effectiveness positively correlated with bacterial solution concentration and grouting frequency.
- Increased grouting rate improved reactant transport efficiency.
- Cementation solution concentration showed no significant effect on calcium carbonate yield or permeability.
Conclusions:
- Numerical modeling provides a robust approach to study MICP grouting.
- Bacterial concentration and grouting frequency are key factors for effective soil remediation using MICP.
