One-dimensional Viscoelastic Consolidation Analysis of Saturated Clay Layer with Semi-permeable Boundary
[1]LIU Zhongyu,ZHU Shaopei,CUI Penglu,et al.One-dimensional Viscoelastic Consolidation Analysis of Saturated Clay Layer with Semi-permeable Boundary[J].Journal of Zhengzhou University (Engineering Science),2022,43(05):71-77.[doi:10.13705/j.issn.1671-6833.2022.05.018]
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Journal of Zhengzhou University (Engineering Science)[ISSN
1671-6833/CN
41-1339/T] Volume:
43卷
Number of periods:
2022 05
Page number:
71-77
Column:
Public date:
2022-08-22
- Title:
- One-dimensional Viscoelastic Consolidation Analysis of Saturated Clay Layer with Semi-permeable Boundary
- Keywords:
- saturated clay; rheology; semi-permeable boundary; fractional derivative; non-Darcy flow; finite difference method
- CLC:
- TU431
- DOI:
- 10.13705/j.issn.1671-6833.2022.05.018
- Abstract:
- In order to further explore the rheological properties of saturated clay, the fraction-order Merchant model modified by Koeller′s spring-pot element was introduced to describe the viscoelastic deformation of soil, and the non-Darcy flow equation described by non-Newtonion index was introduced to describe the pore water flow during consolidation. The one-dimensional rheological consolidation equation of saturated clay under semi-permeable boundary was re-derived. The numerical solution of consolidation equation was obtained by the implicit finite difference method. The effectiveness of the numerical method was verified by comparing with the results of degradation models in related literature. On this basis, the effects of the parameters of semi-permeable boundary, non-Darcy flow and fractional-order Merchant′s rheological model on rheological consolidation process were investigated. The calculation results illustrated that the increase of semi-permeable boundary parameter could accelerate the dissipation of pore pressure and settlement of foundation. In the parameters of the fractional-order Merchant model, the order of fractional derivative and the viscosity coefficient have more significant effects on the settlement rate of foundation, and the influence on the settlement rate of foundation is mainly concentrated in the middle and late stages of consolidation process. The ratio of modulus of Kelvin′s body to independent spring had a major effect on the consolidation process in the middle stage, and with the increase of modulus ratio, the consolidation process of foundation gradually accelerated. In addition, the consolidation rate of soil layer was delayed by non-Darcy flow, and the consolidation of layer was gradually slowed down with the increase of non-Newtonian index.
- References:
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Last Update:
2022-08-23