Enhancing weathered slope stability assessment through the integration of slake durability index, elastic modulus of knocking ball, and electrical resistivity tomography
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View abstract on PubMed
Summary
This summary is machine-generated.This study on sedimentary rock slopes in Kedah found that differential weathering causes instability. Sandstone is more durable than shale and siltstone, with toppling identified as the main failure mode.
Area Of Science
- Geotechnical Engineering
- Engineering Geology
- Environmental Geology
Background
- Sedimentary rock slopes are susceptible to weathering and instability, particularly in interbedded formations.
- Differential weathering of rock layers significantly impacts slope structural integrity.
- Understanding rock mechanical properties is crucial for assessing slope stability.
Purpose Of The Study
- To assess the stability of sedimentary rock slopes in Teloi, Sik, Kedah.
- To investigate the influence of mechanical properties and weathering on slope stability.
- To evaluate the effectiveness of integrated geotechnical assessment methods.
Main Methods
- Laboratory testing: Slake Durability Index (SDI) and Elastic Modulus of Knocking Ball (Ekb).
- Geophysical survey: Electrical Resistivity Tomography (ERT) using Wenner array.
- Kinematic analysis: Stereonet analysis for failure mechanism identification.
- Data visualization: Virtual reality platform for subsurface condition analysis.
Main Results
- Sandstone exhibited higher durability (Id > 17.1%) and elasticity (Ekb: 0.97–29.31 GPa) than shale and siltstone (Id < 2.2%, Ekb: 0.2–2.2 GPa).
- ERT profiles identified weaker zones (siltstone, shale) and stronger zones (sandstone) based on resistivity variations.
- Direct toppling was identified as the primary failure mechanism, linked to critical joint orientations.
Conclusions
- SDI and Ekb effectively assess mechanical properties and weathering resistance of interbedded sedimentary rocks.
- ERT and virtual reality enhance subsurface visualization and complex geological data evaluation.
- The integrated approach provides comprehensive geotechnical evaluation for effective slope stabilization.
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