Freeze-thaw action changes soil microstructure and thus has a great influence on physical and mechanical properties of soils, which is closely correlated to pore water pressure (PWP). Herein, the PWPs of sandy soil and silty clay were measured in laboratory during freeze-thaw cycles (FTC). Experimental results showed that PWP was influenced by temperature, freeze-thaw history (i.e., number of freeze-thaw cycle), soil type and others. The PWP experienced a periodical change as temperatures periodically changes during the FTC testing, the PWP decreased during freezing and increased during thawing. Soil type has a slight influence on the variation of PWP, both in character and extent. A theoretical analysis of PWP in frozen soil was given to explain the PWP changes. In addition, the PWP depression during freezing was a major driving force for water migration. The PWP variations are highly relevant to the changes in soil microstructure such as soil particle (grain size composition and mineral composition), pore structure, and particle arrangement, which will be the focus of further research.
Investigation on the Effects of Freeze-Thaw Action on the Pore Water Pressure Variations of Soils
Contributed by the Ocean, Offshore, and Arctic Engineering Division of ASME for publication in the JOURNAL OF OFFSHORE MECHANICS AND ARCTIC ENGINEERING. Manuscript received January 16, 2017; final manuscript received May 16, 2018; published online June 28, 2018. Assoc. Editor: Lizhong Wang.
- Views Icon Views
- Share Icon Share
- Cite Icon Cite
- Search Site
Zhang, L., Ma, W., and Yang, C. (June 28, 2018). "Investigation on the Effects of Freeze-Thaw Action on the Pore Water Pressure Variations of Soils." ASME. J. Offshore Mech. Arct. Eng. December 2018; 140(6): 062001. https://doi.org/10.1115/1.4040375
Download citation file:
- Ris (Zotero)
- Reference Manager