ISSN: 1945-7545
Page Count: 15

Effects of Arching on Response Time of Miniature Pore Pressure Transducer in Clay

Kutter, BL
Associate professor, University of California, Davis,CA

Sathialingam, N
Graduate student, University of California, Davis,CA

Herrmann, LR
Professor, University of California, Davis,CA

Abstract

A study of the response time of miniature pore pressure transducers embedded in clay soils is presented. The highly nonuniform pore pressure distributions around the transducers due to arching and stress concentration can have a significant effect on transducer response especially when the surrounding soil is loaded anisotropically. This is caused by the difference in compressibility of the soil and the transducer housing. Finite-element analysis and experimental results confirm the importance of these effects. A spherical porous stone or a cylindrical stone with top and side drainage results in significant reduction in response time and in overshoot due to arching effects.

Keywords:
pore water pressure, transducer, response time, finite-element modeling, clay, piezometers, consolidation

Paper ID: GTJ10155J
DOI: 10.1520/GTJ10155J
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