The Effects of Cyclic Triaxial Testing Techniques on the Liquefaction Behavior of Monterey No. O Sand.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MISS
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The objectives of this investigation were to a participate in a cooperative cyclic triaxial testing program with seven other laboratories and b determine the effect of various testing techniques and equipment, i.e., specimen preparation and compaction, B value, density, loading wave form, and compaction equipment on the cyclic triaxial strength of a sand. A total of 28 saturated isotropically consolidated-undrained cyclic triaxial tests were conducted on 2.8-in.-diam by 7-in.-high specimens of Monterey No. O sand. Specimens were compacted to 60 percent relative density 98.5 pcf using three different compaction techniques i.e. dry rodding, moist rodding, and moist tamping with some instances of undercompacting the lower layers. Some specimens were compacted to a relative density of about 66 percent while others were tested when the B value reached approximately 0.91. The effect of loading wave shape was evaluated by subjecting specimens to either a rectangular, near triangular, or sinusoidal loading wave form.
- Soil Mechanics