Behavior of Rigid Piers in Layered Cohesive Soils

by Nabil F. Ismael, (M.ASCE), Research Engr.; Soils Section, Civ. Research Dept., Ontario Hydro, Toronto, Canada,
Tony W. Klym, Supervising Engr.; Soils Sect., Civ. Research Dept., Ontario Hydro, Toronto, Canada,

Serial Information: Journal of the Geotechnical Engineering Division, 1978, Vol. 104, Issue 8, Pg. 1061-1074

Document Type: Journal Paper


Full-scale tests were carried out on two instrumented rigid piers installed in a firm cohesive layered subsoil near Hamilton, Ontario, Canada. The piers were uplifted to failure and laterally loaded under short-term loading conditions. The results were analyzed and different methods of analysis were examined in light of the actual measurements. Large uplift parameters were recorded in the uplift tests due mainly to the large suction pressures measured below the piers. A modification of the nonlinear method of analysis of lateral deflection is proposed for rigid piers on account of thee resultant good predictions of the actual foundation behavior. Detailed in-situ and laboratory measurements of the shear strength were made and the results and the conclusions are presented.

Subject Headings: Soil properties | Layered soils | Uplifting behavior | Failure loads | Lateral loads | Piers | Shear strength | Full-scale tests | Canada | Ontario

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