具有半渗透边界的层状粘弹性饱和土壤热固结的界面流接触阻力效应

IF 3.4 2区 工程技术 Q2 ENGINEERING, GEOLOGICAL
Jiahao Xie, Minjie Wen, Pan Ding, Yuan Tu, Dazhi Wu, Kaifu Liu, Kejie Tang, Menghuan Chen
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引用次数: 0

摘要

当孔隙水以低速流过不同性质土壤的界面时,可能会产生层流现象,从而导致流动接触阻力。为了探讨界面流动接触阻力和流变特性对以半透边界为特征的层状粘弹性饱和土地基热固结过程的影响。本文通过引入分数阶导数模型、哈根-普绪耶定律和随时间变化的荷载,建立了一种新的热固结模型。通过拉普拉斯变换及其逆变换,得出了拟议热固结模型的半解析解。解法的可靠性和正确性与文献中的实验数据进行了验证。进一步探讨了构成参数、流动接触阻力模型参数对热固结过程的影响,以及界面流动接触阻力对地基沉降的影响。结果表明,构成参数和渗透系数对粘弹性饱和土热固结的影响与流动接触阻力有关。流动接触阻力效应的增强导致固结过程中孔隙水压力和位移显著增加。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Interfacial flow contact resistance effect for thermal consolidation of layered viscoelastic saturated soils with semi-permeable boundaries

Laminar flow phenomena may occur when pore water flows at low velocities across the interfaces between soils of different properties, thus causing flow contact resistance. To explore the impacts of interfacial flow contact resistance and rheological characteristics on the thermal consolidation process of layered viscoelastic saturated soil foundation featuring semi-permeable boundaries. This paper established a new thermal consolidation model by introducing a fractional order derivative model, Hagen–Poiseuille law and time-dependent loadings. The semi-analytical solutions for the proposed thermal consolidation model are derived through the Laplace transform and its inverse transform. The reliability and correctness of the solutions are verified with the experimental data in literatures. The influence of constitutive parameters, flow contact resistance model parameters on thermal consolidation process and the interfacial flow contact resistance on foundation settlement, is further explored. The results indicate that the impact of the constitutive parameters and permeability coefficient on the thermal consolidation of viscoelastic saturated soil is related to the flow contact resistance. The enhanced flow contact resistance effect leads to a significant increase in pore water pressure and displacement during the consolidation process.

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来源期刊
CiteScore
6.40
自引率
12.50%
发文量
160
审稿时长
9 months
期刊介绍: The journal welcomes manuscripts that substantially contribute to the understanding of the complex mechanical behaviour of geomaterials (soils, rocks, concrete, ice, snow, and powders), through innovative experimental techniques, and/or through the development of novel numerical or hybrid experimental/numerical modelling concepts in geomechanics. Topics of interest include instabilities and localization, interface and surface phenomena, fracture and failure, multi-physics and other time-dependent phenomena, micromechanics and multi-scale methods, and inverse analysis and stochastic methods. Papers related to energy and environmental issues are particularly welcome. The illustration of the proposed methods and techniques to engineering problems is encouraged. However, manuscripts dealing with applications of existing methods, or proposing incremental improvements to existing methods – in particular marginal extensions of existing analytical solutions or numerical methods – will not be considered for review.
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