An analysis of freeze-thaw cycles on geotechnical properties of soft-soil

Karumanchi, Meeravali; Alla, Suseela; Syed, Habibunnisa; Nerella, Ruben

doi:10.1016/j.matpr.2020.02.266

Cited by 13 publications

(3 citation statements)

References 14 publications

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“…Although previous studies (Gao et al, 2016;Sun et al, 2016;Wang, 2017) did not show the direct effect of freeze-thaw on the bioavailability of heavy metals, authors have speculated that freeze-thaw will change soil physicochemical properties, thereby directly affecting metal speciation and mobility, and then indirectly affecting the bioavailability of soil heavy metals (Guo et al, 2012;Luo and Li, 2021;Wang et al, 2013). Metal-soil adsorption and desorption will presumably be affected by freeze-thaw water content and freeze-thaw temperature (Meeravali et al, 2020;Sun et al, 2019a;Yang et al, 2017). Guo et al (2012) analyzed black soil and brown loam soil from agricultural land under freeze-thaw treatments and found that the amount of Pb immobilized and adsorbed in the freeze-thaw soil was lower than that in non-freeze-thaw soils.…”

Section: Effect Of Freeze-thaw On Pb and As Bioavailabilitymentioning

confidence: 99%

Does freeze-thaw action affect the extractability and bioavailability of Pb and As in contaminated soils?

Sun

Jones

Sun

et al. 2023

Science of The Total Environment

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Section: Effect Of Freeze-thaw On Pb and As Bioavailabilitymentioning

confidence: 99%

Does freeze-thaw action affect the extractability and bioavailability of Pb and As in contaminated soils?

Sun

Jones

Sun

et al. 2023

Science of The Total Environment

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“…Freeze-thaw cycles change the mechanical properties and structural characteristics of soils [3][4][5][6][7] and lead to soil deformation. A study on the physical properties of soils amid freeze-thaw cycles fundamentally emphasized the impact of two variables: the number of freeze-thaw cycles and the initial moisture content on soil shear strength.…”

Section: Introductionmentioning

confidence: 99%

Effect of Freeze–Thaw Cycles on the Shear Strength of Root-Soil Composite

Liu,

Huang,

Zhang

et al. 2024

Materials

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A large alpine meadow in a seasonal permafrost zone exists in the west of Sichuan, which belongs to a part of the Qinghai–Tibet Plateau, China. Due to the extreme climates and repeated freeze–thaw cycling, resulting in a diminishment in soil shear strength, disasters occur frequently. Plant roots increase the complexity of the soil freeze–thaw strength problem. This study applied the freeze–thaw cycle and direct shear tests to investigate the change in the shear strength of root-soil composite under freeze–thaw cycles. This study examined how freeze–thaw cycles and initial moisture content affect the shear strength of two sorts of soil: uncovered soil and root-soil composite. By analyzing the test information, the analysts created numerical conditions to foresee the shear quality of both sorts of soil under shifting freeze–thaw times and starting moisture levels. The results showed that: (1) Compared to the bare soil, the root-soil composite was less affected by freeze–thaw cycles in the early stage, and the shear strength of both sorts of soil was stabilized after 3–5 freeze–thaw cycles. (2) The cohesion of bare soil decreased more than that of root-soil composite with increasing moisture content. However, freeze–thaw cycles primarily influence soil cohesion more than the internal friction angle. The cohesion modification leads to changes in shear quality for both uncovered soil and root-soil composite. (3) The fitting equations obtained via experiments were used to simulate direct shear tests. The numerical results are compared with the experimental data. The difference in the soil cohesion and root-soil composite cohesion between the experiment data and the simulated result is 8.2% and 17.2%, respectively, which indicates the feasibility of the fitting equations applied to the numerical simulation of the soil and root-soil composite under the freeze–thaw process. The findings give potential applications on engineering and disaster prevention in alpine regions.

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“…One of the most significant risk factors is the work of the wall when opening the pit, followed by the erection of buildings using heavy equipment [6,7].…”

Section: Introductionmentioning

confidence: 99%

The effect of negative temperatures on the retaining walls of deep pits

Metelkin

Paramonov²

2023

E3S Web Conf.

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In countries with negative winter temperatures, pits and walls of underground structures are subjected to additional forces caused by frost heaving forces. In Russian construction practice, cases of the impact of such forces on the struts and anchors of construction walls are known, which led to the loss of stability of the struts and the failure of the anchors. Obviously, the design of retaining walls in winter should take into account the effect of additional forces caused by frost heaving and their evolution over time. The solution of test problems for an open pit shows that under certain conditions, the forces in the struts can exceed their values by an order of magnitude, determined when taking into account only the active pressure of the soil. Experimental studies were carried out to assess the processes of development of forces in the elements of the retaining walls in winter. The calculated assessment of the temperature fields and the stress-strain state in the excavation walls was performed using the Termoground program. The comparison of results of experimental and calculated data are shown in the article. The comparison of results of experimental and calculated data is shown in the article.

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An analysis of freeze-thaw cycles on geotechnical properties of soft-soil

Cited by 13 publications

References 14 publications

Does freeze-thaw action affect the extractability and bioavailability of Pb and As in contaminated soils?

Does freeze-thaw action affect the extractability and bioavailability of Pb and As in contaminated soils?

Effect of Freeze–Thaw Cycles on the Shear Strength of Root-Soil Composite

The effect of negative temperatures on the retaining walls of deep pits

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