Eighth International Conference on Case Histories in Geotechnical Engineering
Shear Behavior of Weathered Compacted Shales
Publication: Geo-Congress 2019: Engineering Geology, Site Characterization, and Geophysics (GSP 311)
ABSTRACT
Shale is the most frequently encountered material in civil infrastructure works. It constitutes about 70% of subsurface materials around the world. These materials cause problems because they tend to degrade with time due to weathering. Degradation results in the shale deteriorating from a hard rock-like material with high frictional resistance to a soft fine-grained soil mass with lower shear strength and high deformability. Therefore, common problems associated with embankments constructed with compacted shales include excessive settlement, and local and global instabilities. This paper presents the results of consolidated undrained triaxial tests performed on compacted weathered shale at different compaction energies. The triaxial tests analysis showed that compacted shale can behave as normally consolidated material, slightly over consolidated material, or heavily over consolidated material depending on the energy of compaction and the effective consolidation pressure. Also, for this work characteristics of the stress paths were analyzed in order to evaluate the shear strength parameters obtained from various interpretations of shear strength.
Get full access to this article
View all available purchase options and get full access to this chapter.
References
Abeyesekera, R.A., Lovell, C.W., and Wood, L.E. 1979. Strength testing of compacted shale. Geotechnical Testing Journal, 2(1): 11-19.
Bryson, L.S., Gomez, I.C., and Hopkins, T. 2011. Correlation between durability and geotechnical properties of compacted Shales. In Proceedings of GeoFrontiers 2011. Dallas, Texas, 13-16 March 2011. pp. 4109-4118
Hopkins, T., 1988. Shear strengths of compacted shales. Research Report UKTRP-88-1, niversity of Kentucky. Kentucky Transportation Center, Lexington, KY. 213 pp.
Hopkins, T., Gilpin, B.C., 1981. Identification of Kentucky shales. Research Report UKTRP-81-16, University of Kentucky. Kentucky Transportation Center, Lexington. 177 pp.
Hopkins, T.C., Deen, R.C., 1984. Identification of Shales. ASTM Geotechnical Testing Journal 7 (1), 10–18.
ISRM, 1981. In: Brown, E.T. (Ed.), ISRM Suggested Methods: Rock Characterization, Testing and Monitoring. Pergamon Press, London. 211 pp.
Lovell, C.W., and Johnson, J.M. 1981. Shearing behavior of compacted clay after saturation. In Laboratory Shear Strength of Soil. ASTM STP 740. Edited by R.N. Yong and F.C. Townsend. American Society for Testing and Materials. pp. 277-293.
Nwabuokei, S.O., and Lovell, C.W. 1986. Compressibility and settlement of compacted fills. In Consolidation of Soils Testing and Evaluation. ASTM STP 892. Edited by R.N. Yong, and F.C. Townsend. American Society for Testing and Materials. pp. 184-202.
Skempton, A. W., Long-Term Stability of Clay Slopes, Geotechnique, vol. 14, p. 77, 1954.
Skempton, A.W. 1957. Discussion: The planning and design of new Hong Kong airport. In Proceedings of Institution of Civil Engineering, London, England, June 1957. Vol. 7. pp. 305-307.
Strohm, W. E., Bragg, G. H., and Ziegler, T. W. 1978. Design and construction of compacted shale embankments. Federal Highway Administration, Washington, D.C. Technical guidelines report. Vol. 5: No. FHWARE-78-141.
Terzaghi, K., Peck, R.B., Mesri, G., 1996. Soil mechanics in Engineering Practice, 3rd ed. Wiley, New York, 549 p.
Information & Authors
Information
Published In
Geo-Congress 2019: Engineering Geology, Site Characterization, and Geophysics (GSP 311)
Pages: 229 - 238
Editors: Christopher L. Meehan, Ph.D., University of Delaware, Sanjeev Kumar, Ph.D., Southern Illinois University Carbondale, Miguel A. Pando, Ph.D., University of North Carolina Charlotte, and Joseph T. Coe, Ph.D., Temple University
ISBN (Online): 978-0-7844-8213-1
Copyright
© 2019 American Society of Civil Engineers.
History
Published online: Mar 21, 2019
ASCE Technical Topics:
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.