Pore Water Pressure Distribution and Dissipation During Thaw Consolidation

• Published in: Transport in porous media Vol. 116; no. 2; pp. 435 - 451
• Main Authors: Yao, Xiaoliang, Qi, Jilin, Liu, Mengxin, Yu, Fan
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 2017; Springer Nature B.V
• Subjects: Civil Engineering; Classical and Continuum Physics; Consolidation; Dissipation; Earth and Environmental Science; Earth Sciences; Geotechnical Engineering & Applied Earth Sciences; Hydrogeology; Hydrology/Water Resources; Industrial Chemistry/Chemical Engineering; Nonlinearity; Pore water pressure; Porosity; Porous media; Pressure distribution; Soil layers; Stress concentration; Stress-strain relationships; Water pressure; Novel apparatus; Distribution and dissipation; Thaw consolidation; Pore pressure
• ISSN: 0169-3913; 1573-1634
• DOI: 10.1007/s11242-016-0782-z

A novel apparatus was developed for measurement of pore water pressure distribution and dissipation during thaw consolidation. Thaw consolidation tests were conducted to verify the applicability of nonlinear stress–strain relationship in 3-D large strain thaw consolidation theory. During thawing process, the measured pore pressure at different layers of soil samples increased sharply at first; when a certain value was approached, it stepped into dissipation stage. It was proved that the calculated results have a good agreement with tested results on both pore pressure distribution and dissipation. Further analysis indicated that nonlinearity of pore pressure distribution was proportionally related to thaw consolidation ratio (
R
), while it was opposite for thaw consolidation degree.