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A novel proposed classification system for rock slope stability assessment
Amit Jaiswal1, A K Verma2, T N Singh1
1Department of Civil and Environmental Engineering, Indian Institute of Technology Patna, Patna, 801106, India.
Scientific Reports
|May 14, 2024
Summary
A new Rock Slope Instability Score (RSIS) classifies rock slope stability using geological, geotechnical, and human factors. This system, tested on 81 Himalayan slopes, shows promise for accurate stability assessment.
Area of Science:
- Geotechnical Engineering
- Geology
- Environmental Science
Background:
- Existing rock slope stability classifications often overlook human activities and climate change-induced triggering factors.
- Accurate assessment of rock slope stability is crucial, especially in seismically active and vulnerable regions like the Indian Himalayas.
Purpose of the Study:
- To introduce a novel classification system, the Rock Slope Instability Score (RSIS), for comprehensive rock slope stability assessment.
- To incorporate geological, geotechnical, human, and triggering parameters, including those exacerbated by climate change.
Main Methods:
- Development of the RSIS based on extensive field surveys and laboratory tests on 81 rock slopes in the Indian Himalayas.
- Application of geotechnical laboratory tests, rock sampling, and ground measurements for parameter evaluation.
- Sensitivity analysis using Pearson correlation coefficients to determine parameter influence on slope instability.
Main Results:
- The RSIS demonstrated a strong correlation with actual slope conditions.
- Sensitivity analysis indicated strong positive correlations for most parameters (0.61-0.74), with moderate correlations for discontinuity dip (0.48) and slope-discontinuity direction (0.41).
- Classification of 81 slopes revealed 2 stable, 21 partially stable, 44 unstable, and 14 completely unstable.
Conclusions:
- The proposed Rock Slope Instability Score (RSIS) offers a promising and comprehensive approach to rock slope stability assessment.
- The system effectively accounts for a wider range of factors, including human impact and climate-related triggers, compared to existing methods.
- The RSIS provides a reliable tool for engineers and geologists in managing rock slope hazards in diverse geological settings.
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