A dynamic soil freezing characteristic curve model for frozen soil

• DOI: 10.1016/j.jrmge.2023.09.008
• Publication Date: 2023-11-19T15:25:59Z
• Authors: Xiaokang Li; Xu Li; Jiankun Liu
• Keywords: Unsaturated soils; Soil freezing characteristic curve (SFCC); Frozen soils; 0211 other engineering and technologies; TA703-712; Mathematic models; Engineering geology. Rock mechanics. Soil mechanics. Underground construction; 02 engineering and technology

The soil freezing characteristic curve (SFCC) plays a fundamental role in comprehending thermo-hydraulic behavior and numerical simulation of frozen soil. This study proposes dynamic model to uniformly express SFCCs amidst varying total water contents throughout the freezing-thawing process. Firstly, general is proposed, wherein unfrozen content at arbitrary temperature determined as lesser current reference value derived from saturated SFCC. performance this verified through test data. Subsequently, accordance with electric double layer (EDL) theory, theoretical residual minimum temperatures SFCC are calculated be −14.5 °C −20 for clay particles −260 °C, respectively. To ensure that ends temperature, correction function introduced into model. Furthermore, simplified proposed investigated, necessitating only three parameters inherited Additionally, both models evaluated based on database proven fit data exactly across entire range. Typical recommended parameter values various types soils summarized. Overall, provides not basis most empirical equations but also new more equation describe © 2023 Institute Rock Soil Mechanics, Chinese Academy Sciences. Production hosting by Elsevier B.V. an open access article under CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).