Rheological characteristics and one-dimensional isotache modelling of marine soft clays

Zou, Sheng-Feng; Xie, Xuansong; Li, Jinzhu; Wang, Zhongjin; Wang, Hengyu

doi:10.1080/1064119x.2018.1473903

Cited by 6 publications

(3 citation statements)

References 28 publications

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“…According to Joseph [25], secondary compression is the continued deformation (after completion of dissipation of the excess pore water pressure) of the soil structure after consolidation due to the small numbers of particles moving at random shear strains, in a Poisson process, to the new final positions. Based on Hypothesis B, many different elastic viscoplastic (EVP) constitutive models have been used to calculate consolidation settlements of soft soil ground [71,73,[76][77][78]83]. In contrast, there is also evidence which suggests that similar strain levels at EOP along any stage of consolidation can occur independently of the thickness of consolidated layer and duration of primary consolidation [36,40].…”

Section: Dissipation Pore Water Pressure Induced Compressionmentioning

confidence: 99%

Experimental insights into consolidation rates during one-dimensional loading with special reference to excess pore water pressure

Olek

2020

Acta Geotech.

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Consolidation rate has significant influence on the settlement of structures founded on soft fine-grained soil. This paper presents the results of a series of small-scale and large-scale Rowe cell consolidation tests with pore water pressure measurements to investigate the factors affecting the consolidation process. Permeability and creep/resistance structure factors were considered as the governing factors. Intact and reconstituted marine clay from the Polish Carpathian Foredeep basin as well as clay-sand mixtures was examined in the present study. The fundamental relationship correlating consolidation degrees based on compression and pore water pressure was assessed to indicate the nonlinear soil behaviour. It was observed that the instantaneous consolidation parameters vary as the process progresses. The instantaneous coefficient of consolidation first drastically increases or decreases with increase in the degree of consolidation and stabilises in the middle stage of the consolidation; it then decreases significantly due to viscoplastic effects occurring in the soil structure. Based on the characteristics of the relationship between coefficient of consolidation and degree of dissipation at the base, the consolidation range that complies with theoretical assumptions was established. Furthermore, the influence of coarser fraction in clay-sand mixtures in controlling the consolidation rates is discussed. Keywords Clays Á Consolidation Á Data optimisation Á Excess pore water dissipation Á Gradient-based algorithm Á Permeability List of symbols CA Casagrande method c v Coefficient of consolidation c v e Instantaneous coefficient of consolidation based on compression c v u & Bartłomiej Szczepan Olek

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Section: Dissipation Pore Water Pressure Induced Compressionmentioning

confidence: 99%

Experimental insights into consolidation rates during one-dimensional loading with special reference to excess pore water pressure

Olek

2020

Acta Geotech.

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“…Li et al (2018) studied the non-linear creep characteristics of soft soil by consolidation creep experiments on Tianjin Marine soft soil, and established a three-dimensional non-linear viscoelastic creep constitutive model reflecting the effect of time. Zou et al (2019) proposed an elastic-viscoplastic constitutive model based on the isometric concept and Nishihara model to simulate the 1D compression behavior of Ningbo Marine soft clay. Bai et al (2019) developed a thermo-hydro-mechanical constitutive model for consolidated soil based on the tenet of particle irreversible rearrangement.…”

Section: Introductionmentioning

confidence: 99%

Experimental research on consolidation creep characteristics and microstructure evolution of soft soil

et al. 2023

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The influence of creep deformation of soft soil on engineering construction can’t be ignored. In order to deeply understand the macroscopic mechanical properties and the evolution mechanism of soft soil in microscope during consolidation creep, one-dimensional consolidation creep tests and SEM tests of Nansha soft soil were carried out in this paper. Then the image processing was performed by Image J software to obtain the consolidation creep characteristics, microscopic parameters of particles and pores under different loading pressures. The results of experiment and image processing show that 1) The creep process of Nansha soft soil is divided into the initial instantaneous deformation phase, the attenuation creep phase and the stable creep phase. The creep deformation increases with the consolidation creep stress during the three phases. 2) During the creep process, the distance between particles decreases and some particles are gradually broken, the quantity of particles and pores increases but the volume of them decreases. At the same time, the shape of particles and pores changes from nearly round and strip to nearly oval. 3) The consolidation creep stress determines the particles distance and the degree of fragmentation. And this trend is more obvious with the increase of the consolidation creep stress.

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“…Soft clay is one of the problematic soils in geotechnical engineering due to its high compressibility, low undrained shear strength, significant time-dependent behavior, etc. (Zou et al, 2018;Salimi and Ghorbani, 2020;Zhu et al, 2020). It is widely distributed in considerable parts of the earth, including many low-land and coastal regions (Hamidi and Marandi, 2018).…”

Section: Introductionmentioning

confidence: 99%

Nanoscale friction characteristics of hydrated montmorillonites using molecular dynamics

Wei

Zhang

Yuan

et al. 2021

Applied Clay Science

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Rheological characteristics and one-dimensional isotache modelling of marine soft clays

Cited by 6 publications

References 28 publications

Experimental insights into consolidation rates during one-dimensional loading with special reference to excess pore water pressure

Experimental insights into consolidation rates during one-dimensional loading with special reference to excess pore water pressure

Experimental research on consolidation creep characteristics and microstructure evolution of soft soil

Nanoscale friction characteristics of hydrated montmorillonites using molecular dynamics

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