Date
03 Jun 1988, 10:00 am - 5:30 pm
Abstract
This case study presents the methods that were used successfully to redesign and monitor the performance of a flexible cantilever retaining wall, incorporating an in situ support berm, at a site where thin, weak clay layers were detected in the foundation during construction. A potential mode of failure termed "berm-block sliding", where the retaining wall pushes out the entire support berm as a block along the clay layers, governed the design analysis. Evidence of presheared planes within the clay layers required that the design shear strength parameters be based on residual values. The clay had a significant cohesion component which was utilized in the design along with an observational method towards construction and post-construction behavior. The observational approach included a comprehensive instrumentation and monitoring program and the development of a remedial stabilization contingency plan to be implemented if necessary. This design methodology resulted in significant cost savings.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
2nd Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
University of Missouri--Rolla
Document Version
Final Version
Rights
© 1988 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
Cameron, R. and Carr, C. A., "The Influence of Thin Clay Layers on the Design and Performance of a Flexible Cantilever Retaining Wall" (1988). International Conference on Case Histories in Geotechnical Engineering. 63.
https://scholarsmine.mst.edu/icchge/2icchge/2icchge-session6/63
The Influence of Thin Clay Layers on the Design and Performance of a Flexible Cantilever Retaining Wall
This case study presents the methods that were used successfully to redesign and monitor the performance of a flexible cantilever retaining wall, incorporating an in situ support berm, at a site where thin, weak clay layers were detected in the foundation during construction. A potential mode of failure termed "berm-block sliding", where the retaining wall pushes out the entire support berm as a block along the clay layers, governed the design analysis. Evidence of presheared planes within the clay layers required that the design shear strength parameters be based on residual values. The clay had a significant cohesion component which was utilized in the design along with an observational method towards construction and post-construction behavior. The observational approach included a comprehensive instrumentation and monitoring program and the development of a remedial stabilization contingency plan to be implemented if necessary. This design methodology resulted in significant cost savings.
