Abstract
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-bending 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.
Original language | English (US) |
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Pages (from-to) | 843-845 |
Number of pages | 3 |
Journal | Journal of Geotechnical and Geoenvironmental Engineering |
Volume | 137 |
Issue number | 9 |
DOIs | |
State | Published - Sep 9 2011 |
Keywords
- Calibration
- Contact pressure
- Earth pressure
- Soil stress
- Soil-structure interactions