Effect of freeze–thaw cycles on the deformation behavior of gravelly soil in the 300 m-high earth core rockfill dam

Feng, Mang; Ren, Xiu-Ling; Wang, Jinguo; Zhou, Zhiwei; Liu, Enlong; Yu, Qihao

doi:10.1007/s12665-021-09608-4

Cited by 6 publications

(2 citation statements)

References 30 publications

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“…where E refers to Equation (1). The units used in this model are % = MPa MPa × 100 + Aarctan(min/min − min) (21) while A is determined by The unit of (σ 1 − σ 3 ) used in the determination of A is MPa.…”

Section: The Specific Expression Of Amentioning

confidence: 99%

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Stress–Strain–Time Description and Analysis of Frozen–Thawed Silty Clay under Low Stress Level

Ren

et al. 2022

Geotechnics

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The construction of high-speed railways in cold regions needs to consider the effects of freeze–thaw cycles (FTHs) on the long-term deformation of subgrades. However, at present, research on the creep characteristics of frozen–thawed rocks and soils is not extensive. In the limited studies on frozen–thawed soil creep properties, current research focuses more on high stress–strain–time responses, but for the subgrades, the inner stress is usually low. This paper presents the results of triaxial compression creep tests on remolded, frozen–thawed silty clay sampled in the Yichun-Tieli area and describes its stress–strain–time relationship in an arctan function-based mathematical model. Each creep test condition is studied using three specimens. Frozen–thawed silty clay exhibits attenuation creep under low-level stress. In general, from 4 FTHs to 11 FTHs, the mean elasticity modulus decreases first, and then, increases. The exerted stress is higher than the yield stress; the more FTHs the specimens experience, the more time they need to be deformed stably under the same axial deviatoric stress (ADS). Under the same mean ADS, the mean stable strain of 7 FTHs exceeds the other two FTH conditions and, in general, the mean stable strain of 4 FTHs exceeds 11 FTHs. By dissecting the phenomena, it can be concluded that with FTHs increasing, moisture and voids reconstitute in the process; the elastic strain accounts for most of the total strain and significantly decides the extent of creep deformation; the arctan function-based model is basically able to describe, but not perfectly predict, the stress–strain–time relationship of frozen–thawed silty clay.

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Section: The Specific Expression Of Amentioning

confidence: 99%

“…For 300 m high earth-rockfill dams, the deformation of gravelly soil is a crucial factor in predicting the long-term deformation and settlement after construction. Feng, M. et al [21] used a modified Burgers model to describe deformation under the influence of FTHs.…”

Section: Introductionmentioning

confidence: 99%