Stability Assessment of High Cliff Slopes in Carbonate Rocks - A Case Study, Kingdom of Saudi Arabia (KSA).
DOI:
https://doi.org/10.64862/Keywords:
safe working line, Kinematic analysis, FEM of existing slopeAbstract
This study evaluates the stability of high cliff slopes along a 1 km long carbonate–volcanic ridge in the Kingdom of Saudi Arabia. Geological mapping, satellite imagery, and over 350 joint measurements were used to characterize rock mass conditions across three zones. Rock mass ratings and direct shear tests provided inputs for kinematic and analytical stability assessments using Rocscience and Slope/W. Results indicate potential planar, wedge, and toppling failures controlled by key joint sets, with global factors of safety of about 1.5 (static) and 1.2 (dynamic). A 1–1.5 m distressed zone was identified along the cliff edge, and Safe Working Line (SWL) distances were recommended considering a 250 kPa surcharge. The study provides essential guidance for safe development near steep rock escarpments.
References
Brown, E. T. (1981). ISRM suggested methods for the quantitative description of discontinuities in rock masses. Pergamon Press.
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