Safety Problem of Freezing Projects in Saline Soils

Hu, Xiangdong; Zhao, Fei; Yu, Rui-Zhi

doi:10.1061/41108(381)33

Cited by 2 publications

(2 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, according to data from [4], the amount of unfrozen water will increase more rapidly with an increase in the initial amount of dissolved salt in the pore space. Considering that the unfrozen water content in soils significantly affects its strength properties [5], an increase in the salinity of frozen soils will lead to a decrease in the bearing capacity of the frozen wall (FW). In this situation, the question arises of how to correctly determine the boundaries of the FW.…”

Section: Introductionmentioning

confidence: 99%

“…Existing works have predominantly focused on a single type of salt and typical soils such as clay, sand, and loam, excluding chalk, which is frequently encountered in the freezing depth interval during the construction of potash mine shafts [21]. Concerning frozen walls (FW), the impact of dissolved salt on the strength properties of frozen soils has been noted only qualitatively in a study [5]. In another study [22], the freezing of saline soil was considered using a complex thermo-hydromechanical model, but the mechanical part of the model only considered elastic deformation, neglecting a crucial aspect: the strength of frozen soils.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Influence of soil salinity on the bearing capacity of the frozen wall

Semin,

Levin,

Bublik

et al. 2024

Frattura Ed Integrità Strutturale

View full text Add to dashboard Cite

The article describes the results of laboratory studies on the unfrozen water content and ultimate long-term strength of frozen clay and chalk samples in the temperature range from −10 to −25 °C. The soil samples contained dissolved salt in the pore space, with three types of salts (NaCl, KCl, and CaCl2) being considered. The findings indicate that the influence of the content and type of dissolved salt on the ultimate long-term strength of soils is realized indirectly through the unfrozen water content. In this case, the soil freezing characteristic curve in the region of negative temperatures significantly depends on both the type of dissolved salt and its quantity. The experimental data obtained were used to parameterize the model and calculate the maximum bearing capacity of the frozen wall (FW) in the presence of dissolved salts in the volume of frozen soils. It has been demonstrated that the decrease in the maximum FW bearing capacity is substantial with the appearance of dissolved salt in the pore space of the soils. This decrease is at-tributed to the combined effects of two factors: 1) a reduction in the FW thickness and 2) a decrease in the frozen soil strength due to an increase in the amount of unfrozen water content in the soil pore space. The second factor is deemed more significant.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%