The influence of tunnel insulation measures on the temperature spatiotemporal variation of frozen soil during artificial ground freezing

Ma, Jingyuan; Huang, Kai; Zou, Baoping; Li, Xiaoquan; Deng, Yansheng

doi:10.1016/j.coldregions.2023.103942

Cited by 8 publications

(1 citation statement)

References 24 publications

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“…During the initial stages of research on frozen soil mechanics, scholars conducted unconfined compression strength tests and creep tests to examine the mechanical properties of frozen soils (Andersland and Akili 1967;Takegawa et al 1979;Vyalov et al 1979;Tsytovich et al 1981;Finborud and Berggren 1981). Subsequently, various researchers employed conventional triaxial test systems to investigate the effect of different factors such as temperature (Zhang et al 2017;Ma et al 2023b), water content (Sun et al 2022;Li et al 2023), strain rate (Xie et al 2016;Ma et al 2019;Ma et al 2023a), and stress path (Shen et al 2021;Xu et al 2022Xu et al , 2023 on the mechanical properties of frozen soil, yielding fruitful outcomes. However, the test systems solely permit the application of axial and radial principal stresses, primarily reflecting the mechanical characteristics of frozen soils under axisymmetric stress states, while neglecting the influence of intermediate principal stresses (Kong et al 2021;Zhao et al 2022).…”

Section: Introductionmentioning

confidence: 99%

Mechanical Properties and Constitutive Model of Artificially Frozen Sandy Soils Under Different Intermediate Principal Stresses

Huang,

Ma,

Cai

et al. 2023

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Triaxial compression tests were conducted on frozen sandy soils under a constant minimum principal stress (σ3 = 1.6 MPa) and various intermediate principal stresses (σ2 = 1.6, 3.4, 5.2, 7.0, 8.8, 9.8 MPa). The purpose of the research was to investigate the influence of intermediate principal stress (σ2) on the characteristic stress levels and the deformation characteristics. The test results obtained demonstrated that the crack damage stress and failure stress initially increase and then decrease with an increase in the σ2. However, the crack initiation stress exhibits an initial increase up to a specific value, after which it stabilizes. The difference in deformation between the σ2 and σ3 directions increased with increasing σ2. From the perspective of crack propagation, the influence mechanism of σ2 on the strength is discussed. The deformation difference was revealed using the stress superposition principle and Poisson’s effect. Finally, the constitutive model based on the Weibull distribution and Drucker-Prager strength criterion can accurately represent the stress-strain relationships of frozen sandy soils under various σ2 conditions.

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