A Comparison of Vane Shear Strengths Measured at Two High Rotation Rates on Natural Marine Samples.
Abstract
The relationship between natural shear strengths measured at arbitrary rotation rates of 6 and 23 m.rad/s (21 and 79 deg/min) was developed using laboratory vane test values from 56 marine core samples from the Wilkinson Basin, Gulf of Maine; Exuma Sound, Bahamas; Gulf of Mexico; San Diego Trough; and Golfo San Matias, Argentina. Results of linear least squares regression analyses show that the shear strength measured at 23 m.rad/s is 4-27 greater than if measured at 6 m.rad/s. The increase was a fairly constant 13% for good quality cores; the extremes occurred in highly disturbed cores (4%) and those with high carbonate content (27%). It was determined that sampling disturbance tends to minimize the effect of rotation rate on shear strength. Average soil types for the core groups were determined using Atterberg limits and grain size analyses. A combination of the regression and soil type analyses showed the relationship of the shear strengths at the two rates is independent of the soil particle size for the materials tested.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 17, 1974
- Accession Number
- ADA008432
Entities
People
- Alexander D. Smith
Organizations
- Lehigh University