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A Case History Of Site Instability Due To The Presence Of A Shale Layer Above Sloping Bedrock, Sanjeev Kumar, Braja M. Das, Michael L. Hall

International Conference on Case Histories in Geotechnical Engineering

A study conducted for St. Louis County of Missouri, United States of America classified several areas of the county as unstable for any type of construction because of the presence of high plastic shaley clay or clayey shale on sloping bedrock. These areas are considered to have a potential for site instability to occur due to any change in natural conditions that may increase the moisture content of the high plastic shaley clay or clayey shale. A two-story parking garage, founded on shallow foundations, constructed in one of the potentially unstable zones, showed some movement after several years of its …