A single-objective EPR based model for creep index of soft clays considering L2 regularization

Jin, Yulian; Yin, Zhen Yu; Zhou, Wangda; Yin, Jian Hua; Shao, Jian‐Fu

doi:10.1016/j.enggeo.2018.12.006

Cited by 62 publications

(35 citation statements)

References 82 publications

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“…CT Image (cm) of secondary compression C α can be described by I p using a linear function (Mesri et al, 1973;Nakase et al, 1989;Jin et al, 2019). This implies that the shear-zone soil may exhibit high creep potential under certain loading conditions.…”

Section: Test Materialsmentioning

confidence: 99%

Creep properties of clastic soil in a reactivated slow-moving landslide in the Three Gorges Reservoir Region, China

Wang¹,

Wang²,

Wu³

et al. 2021

Preprint

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Most slow-moving landslides in the Three Gorges Reservoir (TGR) region of China are characterized by pre-existing shear surfaces. The large deformation within the shear zones usually gives rise to clastic soil formation. The creep properties have large influence on the kinematic feature of landslides. In this paper, we report an in-situ direct shear creep test carried out in the shear zone of a reactivated slow-moving landslide in the TGR region. Correspondingly, some laboratory ring shear creep tests are carried out to interpret the movement pattern of this landslide. The shear zone soil exhibits similar non-attenuating creep responses in both the in-situ direct shear and laboratory ring shear creep tests. At the same stress level, however, the in-situ direct shear creep test yields a larger rate of creep displacement due to shearing along the landslide direction. In the ring shear creep tests, at the prepeak stage, the critical creep stress that triggers creep failure is slightly lower than the peak shear strength but much larger than the residual strength; at the postfailure stage, the critical creep stress of the shear-zone soil is equal to the residual shear strength. The rate-dependent residual shear strength may account for the stepwise movement pattern of the landslide.

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Section: Test Materialsmentioning

confidence: 99%

Creep properties of clastic soil in a reactivated slow-moving landslide in the Three Gorges Reservoir Region, China

Wang¹,

Wang²,

Wu³

et al. 2021

Preprint

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show abstract

“…Parameters used in the simulations are summarised in Table 2. The first five parameters are collected from the literature, while the parameters v i and α are obtained through optimization methods [16,50,51] to gain the best match with experimental results.…”

Section: Validation With Experimental Datamentioning

confidence: 99%

Extension of a basic hypoplastic model for overconsolidated clays

Wang

Zhang

et al. 2020

Computers and Geotechnics

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This paper presents a hypoplastic constitutive model for overconsolidated clays. The model is developed based on a basic model proposed recently for sand. New density and stiffness factors are introduced to account for history dependence. The model is capable of predicting a desirable asymptotic state boundary surface for overconsolidated clays. Validation with experimental results shows this model can properly describe the main features of overconsolidated clays.

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“…Tim studied the performance of the variable rate of strain VRS Odometer test for determination of creep properties of a sensitive soft clay [4]. Jin et al proposed a robust and effective evolutionary polynomial regression model for the correlation of creep index [5]. However, previous studies focused more on the relationship between the material composition and deformation of soil, and rarely combined with the groundwater change mode to explore creep characteristics of soil [6].…”

Section: Introductionmentioning

confidence: 99%

Macro and micro analysis on deformation characteristics of fine sand under different groundwater table change

Huang¹,

Wang

et al. 2021

E3S Web Conf.

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By using the samples of fine sand in Shanghai’s seventh layer, creep tests were performed to investigate the deformation characteristics of fine sand under different groundwater table change. It was revealed that the creep of fine sand is closely related to groundwater table change: when the effective force caused by groundwater table change is smaller than pre-consolidation force, the deformation is mainly elastic. When effective force caused by groundwater table change is bigger than pre-consolidation force, the compression deformation is large and the rebound is small; and the deformation is mainly viscoelastic plastic when equal to pre-consolidation stress. Through the scanning electron microscope (SEM) analysis it was found that creep of fine sand is dominated by the slip of particles, not by the breaking of particles. And the fine sand particles are squeezed under the load induced by the groundwater table change, and the particles slide along the indirect contact surface of the particles, resulting in the continuous adjustment of position and relative displacement. Mercury injection test shows that the pore size distribution of fine sand has little change before and after the test.

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A single-objective EPR based model for creep index of soft clays considering L2 regularization

Cited by 62 publications

References 82 publications

Creep properties of clastic soil in a reactivated slow-moving landslide in the Three Gorges Reservoir Region, China

Creep properties of clastic soil in a reactivated slow-moving landslide in the Three Gorges Reservoir Region, China

Extension of a basic hypoplastic model for overconsolidated clays

Macro and micro analysis on deformation characteristics of fine sand under different groundwater table change

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