Research on the Soil Slope Stability Based on Soil Strength Deterioration in Seasonal Frozen Areas

Ge, Qi; He, Weijun; Gong, Ya Feng

doi:10.4028/www.scientific.net/amr.243-249.4270

Cited by 7 publications

(5 citation statements)

References 2 publications

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“…Peng et al 10 , 11 found that the strength of the freeze–thaw interface was sensitive to the changes in temperature and moisture content through indoor tests. Ge Qi et al 12 studied the relationship between freeze–thaw interface shear strength and freeze–thaw cycles under low-temperature conditions. Wang et al 13 found that the variation of the strength of the freeze–thaw interface at different moisture contents was mainly related to cohesion.…”

Section: Introductionmentioning

confidence: 99%

Experimental study on shear characteristics of the silty clay soil-ice interface

Huang

Mao

et al. 2022

Sci Rep

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During the spring thawing, the decrease of soil-ice interface strength by temperature may lead to slope instability. For this reason, some researchers have explored the relationship between temperature and soil-ice interface strength. However, previous studies have not systematically explored the change law of strength at the soil-ice interface from negative temperature to 0 °C. Therefore, direct shear tests were conducted at different shear temperatures and different moisture contents. The effects of temperature and moisture content on strength, cohesion, and internal friction angle are analyzed, while the shear failure mechanism of specimens at different temperatures is discussed according to the location of the shear failure surface. The results show that: Shear properties of soil ice specimens are related to the unfrozen moisture content. The strength of the sample decreases with increasing temperature, and the change in strength is most significant from − 2 to − 0 °C. The strength reduction in this range is from 21.8 to 74.8%, and the higher the moisture content the more obvious this phenomenon is. The shear index tends to decrease with the increase of unfrozen water content, and the greater the increase of unfrozen water, the faster the decrease of both, especially in stage 2. When the temperature is higher than − 5℃, the failure surface is located above the soil-ice interface, and the strength of the specimen is similar to that of the frozen soil. When the temperature is − 10℃, the shear damage surface appears at the soil-ice interface, and the strength of the specimen is determined by the strength of the soil-ice interface.

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Section: Introductionmentioning

confidence: 99%

Experimental study on shear characteristics of the silty clay soil-ice interface

Huang

Mao

et al. 2022

Sci Rep

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“…3, Eq.4, Eq.5 and Eq. 6, empirical formula for CCS stress-strain curve considering different FTC times can be deduced as: (7) Eq. 7 can well describe the relationship among the axial stress, axial strain and FTC of CSS, and it is a three-parameter hyperbolic function with axial strain and a power function with FTC.…”

Section: Resultsmentioning

confidence: 99%

“…Research work on the soil slope stability based on soil strength deterioration in seasonal frozen areas was made by Ge 7 . Experiment study on unconfined compressive strength before and after thaw of the forth layer silt clay in shanghai was presented by the work team of Song 8 .…”

Section: Introductionmentioning

confidence: 99%

Experimental and Mathematical Investigations on Unconfined Compressive Behaviour of Costal Soft Soil under Complicated Freezing Processes

Wang

Zhang

et al. 2016

Polish Maritime Research

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“…Through indoor tests, Peng et al [16] found that temperature and water have a great influence on the strength of frozen silt soil. Ge et al [17] studied the effect of freeze-thaw cycles on shear strength. Wang et al [18] believed that cohesion has a great influence on strength of frozen soil than internal friction angle.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on the Shear Characteristics of Frozen Silty Clay and Grey Relational Analysis

Huang

Mao

et al. 2022

Sustainability

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In the spring thawing season, the decrease in the strength of frozen soil caused by temperature may lead to slope instability. Therefore, researchers have studied the relationship between the temperature and strength of the freeze-thaw zone. However, previous studies have considered the impact of thawing temperature on the strength, but less research on shaping temperature. Therefore, direct shear tests were performed on specimens with different thawing temperatures (i.e., −5, −2.and 1 °C) and different water contents (i.e., 9, 16, and 23%) at different shaping temperatures (i.e., −2, −7 and −12 °C). The results indicated that: the stress-strain curves under different test conditions exhibited strain softening characteristics; shear strength and shear index decreased with increasing shaping temperature; the effect of cohesion on strength was greater than that of internal friction angle; the mechanical mechanism in the freeze-thaw zone was related to the unfrozen water content of the specimen. In addition, the grey correlation analysis showed that the water content had the greatest effect on the shear index, while the shaping temperature had the least effect on the shear index. The grey relational grade of shaping temperature was greater than 0.5, indicating that the effect of shaping temperature on strength was not negligible.

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Research on the Soil Slope Stability Based on Soil Strength Deterioration in Seasonal Frozen Areas

Cited by 7 publications

References 2 publications

Experimental study on shear characteristics of the silty clay soil-ice interface

Experimental study on shear characteristics of the silty clay soil-ice interface

Experimental and Mathematical Investigations on Unconfined Compressive Behaviour of Costal Soft Soil under Complicated Freezing Processes

Experimental Investigation on the Shear Characteristics of Frozen Silty Clay and Grey Relational Analysis

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