Investigation of Density Variation in Triaxial Test Specimens of Cohesionless Soil Subjected to Cyclic and Monotonic Loading.
ARMY ENGINEER WATERWAYS EXPERIMENT STATION VICKSBURG MS GEOTECHNICAL LAB
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The undrained cyclic triaxial test is widely used to evaluate the seismically induced liquefaction potential of saturated cohesionless soil. Concern that internal void ratio changes redistribution due to testing characteristics may render the test inappropriate for dynamic analysis prompted research to investigate such changes. This report describes equipment and procedures to a Prepare sand specimens of known average density or void ratio to a high degree of uniformity. b Load specimens under undrained constant volume conditions to various pore pressure and strain responses. c Freeze specimens under test conditions in such manner that the soil skeleton is not disturbed by the freezing process. d Dissect frozen specimens to establish spatial density distribution. e Conduct control test involving steps a, c, and d only.
- Soil Mechanics