Soil-structure interaction of an earth pressure cell

Published on Jan 8, 2011in Journal of Geotechnical and Geoenvironmental Engineering4.012
路 DOI :10.1061/(ASCE)GT.1943-5606.0000501
G. S. Wachman3
Estimated H-index: 3
(UMN: University of Minnesota),
Joseph F. Labuz32
Estimated H-index: 32
The output from an earth pressure cell (EPC) is usually related to the normal stress in soil through fluid calibration, where a known pressure is applied to the EPC and the output is recorded. However, distribution of normal stress within a soil is not uniform, and the EPC is not an ideal membrane鈥攂ending stiffness affects the response. These factors complicate the performance of the EPC. A calibration procedure for an EPC is reviewed, and it is shown that these controversial sensors can provide an accurate measure of average normal stress if calibrated in soil at a given density. In addition, a soil-structure interaction model is proposed to explain why soil calibration is necessary.
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