A slope failure caused by drainage cutoff through the advancement of seasonal frost, Hudson Bay Lowland

Zeyl, D. P. van; Penner, L. A.; Halim, Rohlini

doi:10.1007/s10346-012-0377-x

Cited by 7 publications

(3 citation statements)

References 22 publications

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“…Extensive studies have shown that slope failure in permafrost areas is associated with the thawing of the active layer 1,2 , and the decay of strength at the freeze-thaw interface is the key to causing slope instability 3 . Moisture content and temperature are the two most important factors affecting the strength of frozen soil [4][5][6] . Meanwhile, a large number of studies have confirmed that the change of strength is mainly realized by changing the state of water through temperature [7][8][9] .…”

Section: Experimental Study On Shear Characteristics Of the Silty Cla...mentioning

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: Experimental Study On Shear Characteristics Of the Silty Cla...mentioning

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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show abstract

“…Studies have shown that the instability of slopes in cold regions is mostly related to the thawing of frozen soil [8,9]. Water content and temperature have a pivotal role in the strength variation of frozen soil [10,11]. Qin et al [12] and Zhou et al [13] found that a slight increase in temperature could cause a reduction of strength when the temperature is close to the freezing point of ice in frozen soi.…”

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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“…Ice bonds in frozen soil combine solid particles together, change the interaction between soil components and have a great impact on the mechanical behavior of soil. Internal temperature, humidity, and stress of frozen soil affect one another [25][26][27]. De Guzman et al [28] found that in a certain temperature range, the strength of shear failure surface is positively proportional to negative temperature.…”

Section: Introductionmentioning

confidence: 99%

Change Mechanism of Strength of Soil-rock Mixture Freezing-thawing Interface under Different Rock

Li¹,

Huang²,

Li³

et al. 2021

Preprint

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With global warming and accelerated degradation of permafrost, the engineering problems caused by the formation of weak zones between the shallow and permafrost layers of soil–rock mixture (S-RM) slopes in permafrost regions have become increasingly prominent. To explore the influence of rock content on the shear strength of the S-RM freezing–thawing interface, the variation in the shear strength for different rock content is studied herein using direct shear tests. In addition, a 3D laser scanner is used for obtaining the topography of the shear failure surface. Combined with the analysis results of the shear band-particle calculation model, the influence of the rock content on the shear strength of the interface is explored. It was found that the impact threshold of the rock content on the interface strength and failure mode is approximately 30%, when the rock content (R) is &gt; 30% and that the shear strength increases rapidly with increasing rock content. When R ≤ 30%, the actual shear plane is similar to waves; when R &gt; 30%, the shear plane appears as gnawing failure. The shear strength of S-RM freezing–thawing interface mainly comes from the bite force and friction between particles. The main reason for the increase in shear strength with increasing rock content is the increase in bite force between particles, which makes the ratio of bite force to friction force approximately 1:1.

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A slope failure caused by drainage cutoff through the advancement of seasonal frost, Hudson Bay Lowland

Cited by 7 publications

References 22 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 Investigation on the Shear Characteristics of Frozen Silty Clay and Grey Relational Analysis

Change Mechanism of Strength of Soil-rock Mixture Freezing-thawing Interface under Different Rock

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