Investigating the Shear Characteristics of Geomembrane–Sand Interfaces Under Freezing Conditions

Designs, Год журнала: 2025, Номер 9(1), С. 9 - 9

Опубликована: Янв. 10, 2025

This study experimentally investigates the effects of freezing conditions on shear characteristics geomembrane–soil interfaces, employing a temperature-controlled direct apparatus. The findings reveal significant variations in stress–shear displacement patterns at soil–geomembrane interface under different thermal conditions. At positive temperatures, manifests strain hardening behavior, whereas negative it transitions from weak softening low normal stress to strong high stress. displacement–normal curves varying temperature and demonstrate dilatant with initial increases followed by decrease as drops. Notably, friction angle is markedly higher temperatures compared positive, undergoing an increase, period stable development, subsequent rise further reduction. average strength ratio observed be 0.58 20 °C, approaches unity between −2 °C −6 exhibits increase −10 °C. These are helpful for application geomembranes frozen soil engineering.

Язык: Английский

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Freeze-thaw cycles affect hydrothermal and heavy metal transport mechanisms in porous media: Closed and transient flooded system conditions

The Science of The Total Environment, Год журнала: 2025, Номер 966, С. 178750 - 178750

Опубликована: Фев. 1, 2025

Язык: Английский

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Multiphysics coupling and mesoscopic seepage characteristics of porous asphalt pavement based on a three-dimensional heterogeneous pore structure

Construction and Building Materials, Год журнала: 2025, Номер 474, С. 141127 - 141127

Опубликована: Апрель 4, 2025

Язык: Английский

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Assessing shear strength degradation of gravel-bearing soil from Northeast Forest Region, China, under freeze–thaw action

Bulletin of Engineering Geology and the Environment, Год журнала: 2025, Номер 84(5)

Опубликована: Апрель 17, 2025

Язык: Английский

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Evolution characterization of moisture migration and pressure-melting of artificially frozen soft soil based on low-temperature triaxial seepage MRI system

Cold Regions Science and Technology, Год журнала: 2025, Номер unknown, С. 104533 - 104533

Опубликована: Апрель 1, 2025

Язык: Английский

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Experimental Investigation of Mechanical Properties and Pore Characteristics of Hipparion Laterite Under Freeze–Thaw Cycles

Applied Sciences, Год журнала: 2025, Номер 15(9), С. 5202 - 5202

Опубликована: Май 7, 2025

The Loess Plateau region of China has an anomalous climate and frequent geological disasters. Hipparion laterite in seasonally frozen regions exhibits heightened susceptibility to freeze–thaw (F-T) cycling, which induces progressive structural weakening significantly elevates the risk slope instability through mechanisms including pore water phase transitions, aggregate disintegration, shear strength degradation. This study focuses on slip zone from Nao panliang landslide Fugu County, Shaanxi Province. We innovatively integrated F-T cycling tests with ring-shear experiments establish a hydro-thermal–mechanical coupled multi-scale evaluation framework for assessing damage material. microstructural evolution soil architecture characteristics was systematically analyzed scanning electron microscopy (SEM) tests. Quantitative characterization mechanical degradation achieved using advanced parameters orientation frequency, probabilistic entropy, fractal dimensions, revealing intrinsic relationship between network anisotropy macroscopic deterioration. experimental results demonstrate that specimens undergo deterioration increasing cycles initial moisture content, predominantly exhibiting brittle deformation patterns. exhibited substantial degradation, total reduction rates 51.54% 43.67% peak residual strengths, respectively. stress–displacement curves transitioned strain-softening strain-hardening behavior, indicating plastic deformation-dominated damage. Moisture content critically regulates microstructure evolution, reducing micropore proportion 23.57–28.62% while promoting transformation mesopores macropores. At 24% areal porosity, dimension increased by 0.2263, 0.0401, 0.0589, Temperature-induced transitions amplified variability cyclic accumulation. These findings advance theoretical understanding laterite’s engineering behavior providing critical insights stability assessment mitigation strategies loess plateau regions.

Язык: Английский

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Dynamic behavior and deformation mechanisms of sand-silt stratified soil under intermittent cyclic loading

Soil Dynamics and Earthquake Engineering, Год журнала: 2025, Номер 196, С. 109509 - 109509

Опубликована: Май 17, 2025

Язык: Английский

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Experimental investigation of thermo-hydro-mechanical interactions in frozen soil using an integrated monitoring system

Engineering Geology, Год журнала: 2025, Номер unknown, С. 108136 - 108136

Опубликована: Май 1, 2025

Язык: Английский

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Impact of subgrade cross-sectional forms on the thermo- mechanical stability of high-speed railway subgrades in cold regions

Engineering Geology, Год журнала: 2024, Номер unknown, С. 107898 - 107898

Опубликована: Дек. 1, 2024

Язык: Английский

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