Residual Strength and Landslides in Clay and Shale

by Herbert L. Noble, Chf.; Engrg., Materials & Substruct., Div. of URS/The Ken R. White Co., Denver, CO,

Serial Information: Journal of the Soil Mechanics and Foundations Division, 1973, Vol. 99, Issue 9, Pg. 705-719

Document Type: Journal Paper

Discussion: Chandler Richard J. (See full record)
Discussion: Yudhbir (See full record)


Three landslides in overconsolidated clays and shales have been analyzed and the computed strengths have been compared with results of laboratory residual shear tests. Agreement between field and laboratory results is good and suggests that residual shear strength can be a valid parameter to use in determining stability of slopes. Methods by which the landslides were stabilized are described. Subsurface drainage has proved to be a simple and effective method of stabilization where there is ground water to remove, even in supposedly tight formations.

Subject Headings: Soil strength | Residual strength | Landslides | Residual soils | Shale | Clays | Shear strength | Shear tests | Subsurface drainage | Soil analysis

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