Hydro-mechanical behavior of corn straw biochar-amended expansive soil and its effect on shallow slope stability under wetting–drying cycles

Description

Research data to show the reproducibility of our experiments and provide editors and reviewers with more information about our work.

Steps to reproduce

Using the FLAC3D platform, a numerical model was created to investigate the deformation response of an expansive soil slope under wet–dry cycles at various biochar contents. The interactions between the mechanical field, equivalent deformation field, and seepage field were simulated using a stepwise coupling technique.To achieve the stable starting state required for the ensuing rainfall-cycle analysis, the initial slope geometry was first constructed, and then the initial stress and seepage fields were balanced. Seepage calculations were performed under boundary conditions, such as specified rainfall intensity and duration, and soil strength and deformation parameters were modified in accordance with the elements' current water content. Based on this, the relationship between the moisture content of the expansive soil and its deformation was mapped to the equivalent deformation field to simulate the swelling and shrinkage deformation responses of the soil under wet–dry cycling conditions. Lastly, the slope-displacement response was obtained through mechanical equilibrium calculations, allowing numerical simulation of the long-term deformation evolution of biochar-amended expansive soil slopes.

Institutions

• Guangxi University

  Guangxi, Nanning

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