Cyclic Strengths Compared for Two Sampling Techniques

by Carlos Espana, (A.M.ASCE), Pres.; ERTEC Western Inc. (formerly Fugro, Inc.), 3777 Long Beach Blvd., Long Beach, Calif. 90807,
Dennis Duffy, (M.ASCE), Asst. Prof.; Arizona State Univ., Tempe, Ariz. 85281,
Ronald C. Chaney, (A.M.ASCE), Assoc. Prof.; Lehigh Univ., Bethlehem, Pa. 18075; formerly, Project Engr., Fugro Inc., 3777 Long Beach Blvd., Long Beach, Calif. 90807,

Serial Information: Journal of the Geotechnical Engineering Division, 1981, Vol. 107, Issue 5, Pg. 563-576

Document Type: Journal Paper


Two distinctly different field sampling and laboratory preparation procedures, used to obtain similar sand samples for cyclic testing, are documented. A comparison of the cyclic strengths of the samples is presented together with examinations of optimum techniques in undisturbed sampling and sample preparation. One procedure used included Pitcher barrel sampling, followed by laboratory trimming by mechanical extrusion into smaller diameter brass molds. The second procedure included hand-carved block sampling followed by either further hand-trimming, freezing and trimming, or saturation and trimming. The block-sampling and hand-trimming preparation procedure resulted in significantly higher cyclic strengths corroborating the concept that disturbance effects can cause major reductions in the cyclic strength of dense sand samples.

Subject Headings: Soil strength | Cyclic strength | Soil analysis | Field tests | Laboratory tests | Cyclic tests | Comparative studies | Health hazards

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