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Detailed Example: Pressure Plate Drying and Wetting

This detailed example uses AIR/W to illustrate how the process of axis translation is used in pressure plates to measure the water content function, and how this can be modeled in GeoStudio 2007. The volumetric water content function describes the capability of the soil to store and release water under changes in negative pore-water pressure or matric suctions.

Since water cavitates at relatively small negative pressures, there is a limit to the amount of negative pressure that can be applied to a soil in order to measure the volumetric water content function. With the axis translation technique, a soil sample is placed in a pressure plate apparatus and positive air pressure is applied to push water out of the soil sample as an alternative method to using negative pressures to suck the water out. Some of the GeoStudio 2007 features that this detailed example highlights include: air pressure and water pressure coupling (Ua-Uw), water balance in a drying / wetting soil sample, and verification with known solutions. Read the whole Detailed Example and follow along in GeoStudio 2007 using the AIR/W data file:        Pressure plate cell wetting and drying (3.96 MB)

As the holidays approach and we draw close to the end of another year, we at GEO-SLOPE would like to take this time to express our profound sense of gratitude. We are grateful for the team that we have assembled, and for the extraordinary things that we have been able to accomplish together. We are grateful for your supportive feedback, and for the opportunity to work with you and your organization to advance the practice of geotechnical engineering.

We would like to take this opportunity to wish you a Merry Christmas and a Happy New Year!

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