Pore Water Pressure Development in Soft Soil due to Installation and Loading of Controlled Modulus Columns
Publication: Journal of Geotechnical and Geoenvironmental Engineering
Volume 147, Issue 12
Abstract
Excess pore water pressure (EPWP) development and decay due to the installation and static loading tests of controlled modulus columns (CMC) in soft soil was measured with piezometers equipped with low air entry (LAE) filters and a piezocone (CPTU) equipped with a high air entry (HAE) filter. The HAE filter allows for detailed detection of EPWP in short time intervals during construction of CMC. The influence zone due to the installation of the CMC group extends up to 40D (D = column diameter) with significant installation effects and high EPWP within the zone of 7D. The influence zone during the static loading test is much narrower and does not exceed 2D. The presented research shows the applicability of using a CPTU in EPWP monitoring during CMC construction and clarifies some effects of CMC group installation.
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Data Availability Statement
Some or all data, models, or code that support the findings of this study are available from the corresponding author upon reasonable request.
Acknowledgments
The research is supported by the National Centre for Research and Development grant PBS3/B2/18/2015.
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Journal of Geotechnical and Geoenvironmental Engineering
Volume 147 • Issue 12 • December 2021
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This work is made available under the terms of the Creative Commons Attribution 4.0 International license, https://creativecommons.org/licenses/by/4.0/.
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Received: Dec 11, 2020
Accepted: Jul 19, 2021
Published online: Sep 20, 2021
Published in print: Dec 1, 2021
Discussion open until: Feb 20, 2022
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