USE OF ELECTRICAL PRESSURE TRANSDUCERS TO MEASURE SOIL PRESSURE.
Phase rept. no. 5 on research in earth physics.
MASSACHUSETTS INST OF TECH CAMBRIDGE SOIL MECHANICS DIV
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The application of electrical transducers to measure soil pressures against planar surfaces is described, with emphasis on the determination of the coefficient of earth pressure at rest K sub o for cohesive soils. Data are presented on the value of K sub o for a saturated silty clay Boston Blue Clay as a function of consolidation pressure, maximum past pressure and overconsolidation ratio. These data were obtained via a square fixed ring oedometer which had a Dynisco pressure transducer screwed into one side of the cell. Although the observed values of K sub o appear reasonable and are consistant with other published data, the degree of accuracy is unknown. Attempts to calibrate the transducer by comparing measured versus applied average pressures on a planar surface are described. These results indicated that the measured pressure is directly related to the applied soil pressure. Author
- Soil Mechanics
- Test Facilities, Equipment and Methods