Location
New York, New York
Date
15 Apr 2004, 1:00pm - 2:45pm
Keywords and Phrases
Slope movement, Slope stability, Site instability, Shale
Abstract
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 construction. After movements in the structure were observed, further review of the subsurface conditions revealed that as a result of construction at the site, the clayey shale layer became exposed, thus, creating easy access for water to enter this layer. Infiltration of water caused softening of the clayey shale layer, which in turn caused movements in the structures constructed on the site. This paper presents the detailed information about the subsurface conditions and type of structures constructed on the site.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
5th Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 2004 University of Missouri--Rolla, All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution-Noncommercial-No Derivative Works 4.0 License.
Document Type
Article - Conference proceedings
File Type
text
Language
English
Recommended Citation
Kumar, Sanjeev; Das, Braja M.; and Hall, Michael L., "A Case History of Site Instability Due to the Presence of a Shale Layer Above Sloping Bedrock" (2004). International Conference on Case Histories in Geotechnical Engineering. 1.
https://scholarsmine.mst.edu/icchge/5icchge/session02/1
A Case History of Site Instability Due to the Presence of a Shale Layer Above Sloping Bedrock
New York, New York
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 construction. After movements in the structure were observed, further review of the subsurface conditions revealed that as a result of construction at the site, the clayey shale layer became exposed, thus, creating easy access for water to enter this layer. Infiltration of water caused softening of the clayey shale layer, which in turn caused movements in the structures constructed on the site. This paper presents the detailed information about the subsurface conditions and type of structures constructed on the site.
