A continuum-discrete hierarchical multi-scale computational framework for modelling mechanical behaviours of MICP-treated soil

• Applicant: Professor Yupeng Jiang, Ph.D.
• Subject Area: Applied Mechanics, Statics and Dynamics
• Term: since 2024
• Project identifier: Deutsche Forschungsgemeinschaft (DFG) - Project number 545895869

Soil improvement means making soil stronger for construction. It's crucial these days due to increased industrialization, growing cities, and climate change. One effective method is using Microbially Induced Calcite Precipitation (MICP), which is eco-friendly, affordable, and doesn't produce much carbon emissions. MICP uses natural processes to make the soil stronger while keeping it permeable. However, we don't fully understand how MICP affects soil strength, which limits its use. Computer models can predict some soil behaviors, but they have challenges in being accurate and efficient. Our review shows we need a better computer system to simulate how the soil behaves after MICP treatment. This system should show how tiny particles interact and connect these small-scale behaviors to large-scale ones. To address this, we suggest creating a computer model that considers different scales, showing details like particle shapes, calcite levels, and how bonds break. This project aims to improve our understanding and simulation abilities for soils treated with MICP. By looking into the details of MICP-induced soil improvements at various scales, we aim to contribute significantly to the broader scientific understanding of these processes, providing better solutions for soil engineering challenges in the face of contemporary environmental and urbanization pressures.

• DFG Programme: Research Grants