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A GIS-based 3D slope stability analysis method based on the assumed normal stress on the slip surface
Guo Yu1, Mowen Xie2, Jun Liang3
1School of Civil and Resource Engineering, University of Science & Technology Beijing, Beijing, 100083, China.
Scientific Reports
|March 12, 2020
Summary
This study introduces a 3D slope stability analysis using Geographic Information Systems (GIS), providing more accurate safety factors by considering normal stress distribution. The method enhances traditional approaches for better slope stability assessments.
Area of Science:
- Geotechnical Engineering
- Geographic Information Systems (GIS)
- Computational Geology
Background:
- Traditional slope stability analysis often simplifies stress distributions.
- Accurate assessment of the 3D safety factor is crucial for geotechnical engineering.
- Existing methods may not fully capture the complexities of real-world slopes.
Purpose of the Study:
- To develop a novel 3D slope stability analysis method using GIS.
- To improve the accuracy of safety factor calculations by incorporating normal stress distribution.
- To create a practical GIS-based extension module for slope stability analysis.
Main Methods:
- Development of a 3D slope stability model using grid column units.
- Integration of GIS spatial analysis capabilities for parameter expression.
- Derivation of equilibrium equations under limit equilibrium conditions.
- Analysis of normal stress distribution to approximate functions.
- Application of the Mohr-Coulomb strength criterion for 3D safety factor calculation.
Main Results:
- A GIS-based 3D slope stability analysis method was successfully developed.
- The proposed method yields a 3D safety factor that more closely approximates actual values.
- A functional GIS extension module integrating the analysis model was created.
- Verification through three case studies confirmed the module's accuracy and feasibility.
Conclusions:
- The GIS-based 3D slope stability analysis method offers enhanced accuracy over traditional techniques.
- The developed extension module provides a valuable tool for geotechnical engineers.
- This approach improves the reliability of slope stability assessments in complex geological settings.
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