Location
St. Louis, Missouri
Date
08 May 1984, 8:00 am - 10:00 am
Abstract
This paper describes the excavation procedure and some stability problems encountered in connection with a 10-m deep braced excavation in medium soft Oslo clay. Very large deformations in the first excavated sections made it clear that the factor of safety with respect to bottom heave failure was very close to unity, and hence, much lower than the value of 1.5 calculated from a conventional total stress analysis based on vane strength. Thus, the experiences from this excavation yield an excellent opportunity to test new and better methods of stability analysis which have been developed during the last 10 years. Furthermore, recorded values of horizontal displacements and strut loads contribute to improve our knowledge about earth pressures against flexible structures and behaviour of braced deep excavations in clay.
Department(s)
Civil, Architectural and Environmental Engineering
Meeting Name
1st Conference of the International Conference on Case Histories in Geotechnical Engineering
Publisher
Missouri University of Science and Technology
Document Version
Final Version
Rights
© 1984 Missouri University of Science and Technology, 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
Aas, Gunnar, "Stability Problems in a Deep Excavation in Clay" (1984). International Conference on Case Histories in Geotechnical Engineering. 37.
https://scholarsmine.mst.edu/icchge/1icchge/1icchge-theme2/37
Stability Problems in a Deep Excavation in Clay
St. Louis, Missouri
This paper describes the excavation procedure and some stability problems encountered in connection with a 10-m deep braced excavation in medium soft Oslo clay. Very large deformations in the first excavated sections made it clear that the factor of safety with respect to bottom heave failure was very close to unity, and hence, much lower than the value of 1.5 calculated from a conventional total stress analysis based on vane strength. Thus, the experiences from this excavation yield an excellent opportunity to test new and better methods of stability analysis which have been developed during the last 10 years. Furthermore, recorded values of horizontal displacements and strut loads contribute to improve our knowledge about earth pressures against flexible structures and behaviour of braced deep excavations in clay.
