Thermo-hydro-mechanical modeling of artificial ground freezing taking into account the salinity of the saturating fluid

Tounsi, H.; Rouabhi, Ahmed; Jahangir, Emad

doi:10.1016/j.compgeo.2019.103382

Cited by 57 publications

(10 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The bearing capacity of composite foundation related to the cushion, which adjusts the pile-soil stress ratio to distribute the load reasonably between the pile and the soil between piles [20]. Meanwhile, the secondary salinization mainly arises from the interaction and migration of water, heat and salt as well as the rise and migration of capillary water vapor in saline soil [21][22][23][24][25][26]. This phenomenon can be curbed by controlling the water and salt migration with partitions.…”

Section: Introductionmentioning

confidence: 99%

Effects of Cement-Modified Soil as Blocking Cushion of Saline Soil Subgrade

Lai¹,

Lei²,

Ji³

et al. 2020

RCMA

View full text Add to dashboard Cite

This paper puts forward a novel approach called cement-modified soil (CMS) blocking cushion technology to reinforce the subgrade in saline soil region: the cushion layer of composite foundation and a roadbed partition layer are combined into one CMS layer. The effectiveness of the proposed approach was verified through outdoor experiments on the saline soil section (DK821+600-DK821+900) of the newly built Lanxin High-Speed Railway. The experimental results show that the CMS layer can effectively adjusts the pile-soil stress ratio of the composite foundation, thereby enhancing the bearing capacity of the composite foundation and reducing the total settlement of the subgrade; it is also verified that the CMS layer greatly suppresses the upward migration of capillary water and water vapor in the foundation soil, and curbs the migration of salt, preventing the secondary salinization of the railway subgrade. Overall, this research provides a simple and low-cost subgrade reinforcement technique for saline soil regions, shedding new light on the engineering application of the CMS.

show abstract

Section: Introductionmentioning

confidence: 99%

Effects of Cement-Modified Soil as Blocking Cushion of Saline Soil Subgrade

Lai¹,

Lei²,

Ji³

et al. 2020

RCMA

View full text Add to dashboard Cite

show abstract

“…If more factors of the frozen soil environment are considered, the calculation results will be more accurate [23,39,40]. Some scholars [41][42][43][44][45][46] developed the THM coupling model by combining the TH coupling model with the porosity-strain relationship and conducted a further study on the THM coupling mechanism for the frozen soil by integrating Galerkin discretization, fluid dynamics theory, and an actual case. The phase change equation for the temperature field takes porosity as the variable, and the moisture migration equation is in Figure 2.…”

Section: Mechanism Of Multiphysical Field Coupling For Thementioning

confidence: 99%

A Review of the Research on Thermo-Hydro-Mechanical Coupling for the Frozen Soil

Teng

Liu

et al. 2022

Geofluids

View full text Add to dashboard Cite

This paper reviews the history of the research development on the coupling mechanism of the multiphysical field, e.g., thermo-hydro-mechanical (THM), for frozen soil. The objective is to deepen the current understanding of the theories and mechanism of multiphysical field coupling in the frozen soil and the dynamic changes in the temperature, moisture, and stress fields during soil freezing. A new differential equation of the coupling of temperature field and moisture field is proposed. Based on the DiscreteFrechetDist algorithm, a fitting method of evaluating a curve is proposed. The paper is expected to help understand the soil freezing process in cold regions and enhance the innovativeness of the research methodologies dealing with multifield coupling for the frozen soil.

show abstract

“…Frozen saline soil has aroused great attention and concern to both geotechnical and permafrost engineering regarding permafrost degradation, landslides, ground freezing and infrastructure stability [4,22,41,44]. Mechanical behavior of frozen saline soils can be distinctive from well-studied frozen non-saline sand not only because of lower strength but also due to significant unfrozen water content (UWC) above the eutectic temperature [5,8,9,16,34].…”

Section: Introductionmentioning

confidence: 99%

Pore-water pressure development in a frozen saline clay under isotropic loading and undrained shearing

et al. 2021

View full text Add to dashboard Cite

A systematical testing program on frozen Onsøy clay under isotropic loading and undrained shearing at different temperatures (− 3 ~ − 10 °C), strain rates (0.2~5%/h) and initial Terzaghi effective stress (20~400 kPa) was conducted with the focus on pore pressure development. It is meant to increase the understanding and facilitate the development of an ‘effective stress’-based model for multi-physical analysis for frozen soils. This study adopted the pore pressure measurement method suggested by Arenson and Springman (Can Geotech J 42 (2):412–430, 2005. https://doi.org/10.1139/t04-111) and developed a new testing procedure for frozen soils, including a ‘slow’ freezing method for sample preparation and post-freezing consolidation for securing hydraulic pressure equilibrium. The B-value of frozen soils is less than 1 and significantly dependent on temperature and loading history. The dilative tendency or pore pressure development in an undrained shearing condition is found to be dependent on both unfrozen water content and mean stress, which is consistent with unfrozen soils. Besides, the experimental results reported in the literature regarding uniaxial tests show that the shear strength does not share the same temperature- and salinity-dependency for different frozen soil types. The rate dependency of frozen soils is characterized between rate dependency of pure ice and that of the unfrozen soil and is therefore highly determined by the content of ice and the viscous behavior of ice (through temperature dependency). This paper also explains the pore pressure response in freezing and thawing is dependent on volumetric evolution of soil skeleton.

show abstract

Thermo-hydro-mechanical modeling of artificial ground freezing taking into account the salinity of the saturating fluid

Cited by 57 publications

References 40 publications

Effects of Cement-Modified Soil as Blocking Cushion of Saline Soil Subgrade

Effects of Cement-Modified Soil as Blocking Cushion of Saline Soil Subgrade

A Review of the Research on Thermo-Hydro-Mechanical Coupling for the Frozen Soil

Pore-water pressure development in a frozen saline clay under isotropic loading and undrained shearing

Contact Info

Product

Resources

About