Analysis of large-strain elastic viscoplastic consolidation for soft clay with vertical drains considering non-Darcian flow
| Autor: | Zhongyu Liu, Jiachao Zhang, Huang Jiatao, Chuanyong Xu |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Consolidation (soil)
Viscoplasticity Applied Mathematics Constitutive equation Finite difference method 02 engineering and technology Mechanics 01 natural sciences Permeability (earth sciences) Nonlinear system 020303 mechanical engineering & transports 0203 mechanical engineering Soft clay Modeling and Simulation 0103 physical sciences Hardening (metallurgy) 010301 acoustics Geology |
| Zdroj: | Applied Mathematical Modelling. 92:770-784 |
| ISSN: | 0307-904X |
| DOI: | 10.1016/j.apm.2020.11.038 |
| Popis: | The consolidation mechanism of a system of vertical drains is complicated because many factors such as geometric nonlinearity, material nonlinearity and non-Darcian flow characteristics have paramount influences on the consolidation rate and surface settlement. In the current study, we propose a new scheme that applies Gibson's large-strain theory incorporating the unified hardening (UH) constitutive equation considering time effect. The vertical and radial flows obeying the non-Darcian flow described by the non-Newtonian index along with varying permeability coefficients are also captured in the analysis. The scheme was addressed through a program adopting the finite difference method and verified the effectiveness by comparison with the nonlinear theoretical simulation solution of present literature and a field monitoring case. The results of the parametric analysis showed that the increase in soil viscosity and initial degree of overconsolidation has the opposite influence on the rate of consolidation and the prediction of settlement, whereas the final settlement value is virtually independent of the effect of non-Darcian flow. |
| Databáze: | OpenAIRE |
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