Characterizing durability of mudrocks for slope stability purposes
Published:January 01, 1995
Jeffrey C. Dick, Abdul Shakoor, 1995. "Characterizing durability of mudrocks for slope stability purposes", Clay and Shale Slope Instability, William C. Haneberg, Scott A. Anderson
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The lithologic characteristics and slake durability of mudrocks from 48 natural and human-made slopes were investigated with the objective of developing a classification of mudrock durability for slope stability purposes. Slopes from which samples were taken ranged from long-term stable to highly unstable. Samples included 10 claystones, 17 shales, and 21 mudstones. The durability of mudrocks was classified as high, medium, or low on the basis of relationships between lithologic characteristics, slake durability, and slope conditions, as observed in the field. The three classes of durability were then used to evaluate the likelihood of occurrence of the four commonly recognized types of instability that affect slopes in mudrocks: excessive erosion, slumps, debris flows, and undercutting-induced failures. High-durability mudrocks were found to be susceptible to undercutting only, medium-durability mudrocks to slumps, debris flows, and undercutting-induced failures, and low-durability mudrocks to all four types of slope instability.
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Clay and Shale Slope Instability
Ten state-of-the-art papers address both empirical and analytical aspects of clay and shale slope instability. Among the topics discussed in detail are limit equilibrium stability analysis, shear strength of clay and clayey colluvium, use of triaxial test data to evaluate viscoplastic slope movements, numerical modeling of pore pressure distribution in heterogeneous soils, rational analysis of rainfall and landslide movement patterns, the effects of hydrothermal alteration on slope stability, mudrock durability and stability considerations, and regional clay and shale slope stability problems in Italy. This volume is a must for researchers and practitioners in engineering geology, geomorphology, geotechnical engineering, hydrogeology, natural hazard assessment, and other fields concerned with clay and shale slope processes.