Investigation on the behavior of frozen silty clay subjected to monotonic and cyclic triaxial loading

Xu, Xin; Li, Qionglin; Xu, Guofang

doi:10.1007/s11440-019-00826-6

Cited by 46 publications

(13 citation statements)

References 35 publications

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“…In high‐altitude and high‐latitude areas, rock strata can be frozen deeply to several hundred metres 1 . Excavation of frozen rock masses is increasingly required with increases in human activity in such areas 2–4 . For safe and efficient engineering and mining in permafrost regions, an in‐depth understanding of the mechanical properties of frozen rock masses is necessary.…”

Section: Introductionmentioning

confidence: 99%

Strength and the cracking behavior of frozen sandstone containing ice‐filled flaws under uniaxial compression

Jia

Han

Zhao

et al. 2022

Permafrost & Periglacial

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Section: Introductionmentioning

confidence: 99%

Strength and the cracking behavior of frozen sandstone containing ice‐filled flaws under uniaxial compression

Jia

Han

Zhao

et al. 2022

Permafrost & Periglacial

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“…Some efforts have been made on understanding uniaxial strength of frozen saline soils, which is a function of soil types, salinity, strain rate and temperature [16,32,33,37], while triaxial test with focus on mechanical behavior under confinement condition has received less attention and has not formed a standard experimental framework, compared with unfrozen soils [21,51,52]. On the one hand, the boundary condition in most of triaxial tests for frozen soil remains unclear.…”

Section: Introductionmentioning

confidence: 99%

Pore-water pressure development in a frozen saline clay under isotropic loading and undrained shearing

et al. 2021

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A systematical testing program on frozen Onsøy clay under isotropic loading and undrained shearing at different temperatures (− 3 ~ − 10 °C), strain rates (0.2~5%/h) and initial Terzaghi effective stress (20~400 kPa) was conducted with the focus on pore pressure development. It is meant to increase the understanding and facilitate the development of an ‘effective stress’-based model for multi-physical analysis for frozen soils. This study adopted the pore pressure measurement method suggested by Arenson and Springman (Can Geotech J 42 (2):412–430, 2005. https://doi.org/10.1139/t04-111) and developed a new testing procedure for frozen soils, including a ‘slow’ freezing method for sample preparation and post-freezing consolidation for securing hydraulic pressure equilibrium. The B-value of frozen soils is less than 1 and significantly dependent on temperature and loading history. The dilative tendency or pore pressure development in an undrained shearing condition is found to be dependent on both unfrozen water content and mean stress, which is consistent with unfrozen soils. Besides, the experimental results reported in the literature regarding uniaxial tests show that the shear strength does not share the same temperature- and salinity-dependency for different frozen soil types. The rate dependency of frozen soils is characterized between rate dependency of pure ice and that of the unfrozen soil and is therefore highly determined by the content of ice and the viscous behavior of ice (through temperature dependency). This paper also explains the pore pressure response in freezing and thawing is dependent on volumetric evolution of soil skeleton.

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“…Frost heave of soils can cause serious damage to various engineering infrastructures built in cold regions [1,2]. When the temperature of soil decreases to the freezing point, the soil starts to freeze, accompanied by the formation of various types of ice from the pore water, as well as the external water that migrated into the soil.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Frost‐Heaving Force Development of Tibetan Clay Subjected to One‐Directional Freezing in an Open System

Xiong

et al. 2021

Advances in Civil Engineering

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Frost heave of soils involves complex coupled interactions among moisture, heat, and stress, which can cause serious damage to cold regions engineering. In this paper, a series of one-directional freezing experiments were implemented for the Tibetan clay with rigid restraint in an open system. The varying characteristics of the temperature, frost-heaving force, and water replenishment during the freezing process were analyzed under different freezing temperatures (−5, −7, and − 9°C), dry densities (1.65, 1.7, and 1.75 g cm−3), and initial moisture contents (11, 14, and 17%) of the soil samples. It was concluded that the freezing of soil samples mainly occurred within 10–25 hours from the beginning of the experiment; hereafter, the soil temperatures tended to be stable. The development of frost-heaving force could be divided into three stages as slow increase, quick increase, and relative stable stages. Low freezing temperature, large dry density, and high moisture content were all the contributors to the frost-heaving process of the soil, which could increase the freezing depth, magnitude of the frost-heaving force, and amount of water replenishment. The variations in water replenishment from the open system corresponded to the three stages of the frost-heaving force but had time lags. The moisture contents at different layers of soil samples were measured after the freezing experiment. The results showed that the freeze part of soil samples experienced a significant wetting, while the unfrozen part experienced drying during the experiment. The degrees of wetting and drying were related to the freezing temperature, dry density, and initial moisture content of the soil samples. The experiment results could provide data support for theoretical study on moisture, heat, and stress coupling in freezing soil.

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Investigation on the behavior of frozen silty clay subjected to monotonic and cyclic triaxial loading

Cited by 46 publications

References 35 publications

Strength and the cracking behavior of frozen sandstone containing ice‐filled flaws under uniaxial compression

Strength and the cracking behavior of frozen sandstone containing ice‐filled flaws under uniaxial compression

Pore-water pressure development in a frozen saline clay under isotropic loading and undrained shearing

Experimental Study on Frost‐Heaving Force Development of Tibetan Clay Subjected to One‐Directional Freezing in an Open System

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