Dynamic constitutive model of frozen soil that considers the evolution of volume fraction of ice

Xie, Qijun; Su, Lijun; Zhu, Zhiwu

doi:10.1038/s41598-020-77955-6

Cited by 7 publications

(1 citation statement)

References 20 publications

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“…When the frozen soil is subjected to high-strain rate loads such as impact and explosion, the adiabatic temperature rise will occur inside the permafrost. The temperature field generated by the temperature rise causes the phase transition between ice and water and the change of ice content, thus affecting the mechanical properties of permafrost 44 , 45 . Zhang et al 46 proposed the strain rate- temperature equivalence of permafrost by regression analysis of test data, and used the damage caused by adiabatic temperature rise to describe the thermal softening effect of permafrost under impact load, and proposed the damage evolution model of permafrost.…”

Section: Test Principle and Methodsmentioning

confidence: 99%

Analysis on the synergistic variation law of pile refreezing process and bearing capacity based on high-strain dynamic test method

Yu,

Cao,

Zhao

2023

Sci Rep

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The high-strain dynamic test method possesses the attributes of speed, efficiency, and environmentally-friendly, low-carbon characteristics. To study the reliability of the high-strain dynamic test method in detecting the bearing capacity of pile foundation in permafrost regions, 4 test piles, each with a length of 15 m and a diameter of 1.0 m, were poured based on the actual bridge construction project in the permafrost region of Daxing'an Mountains in China. Based on the temperature data between the piles and soil, the refreezing state of the pile foundation was comprehensively judged. Subsequently, the static method was employed to assess the friction resistance values and single pile bearing capacity of each soil layer on the pile side under different freezing states before and after the pile foundation refreezing. Building upon these findings, the restrictive parameters for soil elastic limit $$q_{(i)}$$ q ( i ) , soil resistance $$R_{U} (i)$$ R U ( i ) and other parameters in the pile-soil model of high-strain dynamic test method are clarified. The test and analysis results indicate that under the condition that the ground temperature of frozen soil is about − 1.9 °C, the pile-soil refreezing takes about 120 days, and the pile-soil refreezing is a slow process; In CAPWAPC calculation program, after the values of soil parameters were constrained by the results of static-load test, the calculated curve is in satisfactory agreement with the measured curve, and the parameters of the pile-soil model are reliable, which can be used for the rapid detection of the ultimate bearing capacity of piles in permafrost regions; In the process of pile-soil refreezing, the change of temperature field affects the freezing strength between pile and soil, the process of pile-soil refreezing is positively correlated with the increase of pile foundation bearing capacity.

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Section: Test Principle and Methodsmentioning

confidence: 99%

Analysis on the synergistic variation law of pile refreezing process and bearing capacity based on high-strain dynamic test method

Yu,

Cao,

Zhao

2023

Sci Rep

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Dynamic constitutive model for unsaturated frozen soil considering the influence of matrix suction

Qiao

Zhu

2022

Meccanica

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State-of-the-Art Constitutive Modelling of Frozen Soils

Li,

Yin,

et al. 2024

Arch Computat Methods Eng

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In recent decades, the constitutive modelling for frozen soils has attracted remarkable attention from scholars and engineers due to the continuously growing constructions in cold regions. Frozen soils exhibit substantial differences in mechanical behaviours compared to unfrozen soils, due to the presence of ice and the complexity of phase changes. Accordingly, it is more difficult to establish constitutive models to reasonably capture the mechanical behaviours of frozen soils than unfrozen soils. This study attempts to present a comprehensive review of the state of the art of constitutive models for frozen soils, which is a focal topic in geotechnical engineering. Various constitutive models of frozen soils under static and dynamic loads are summarised based on their underlying theories. The advantages and limitations of the models are thoroughly discussed. On this basis, the challenges and potential future research possibilities in frozen soil modelling are outlined, including the development of open databases and unified constitutive models with the aid of advanced techniques. It is hoped that the review could facilitate research on describing the mechanical behaviours of frozen soils, and promote a deeper understanding of the thermo-hydro-mechanical (THM) coupled process occurring in cold regions.

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Dynamic constitutive model of frozen soil that considers the evolution of volume fraction of ice

Cited by 7 publications

References 20 publications

Analysis on the synergistic variation law of pile refreezing process and bearing capacity based on high-strain dynamic test method

Analysis on the synergistic variation law of pile refreezing process and bearing capacity based on high-strain dynamic test method

Dynamic constitutive model for unsaturated frozen soil considering the influence of matrix suction

State-of-the-Art Constitutive Modelling of Frozen Soils

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