应力相关渗透率、斜坡荷载和非达西渗流对一维固结的综合影响

IF 5.3 1区工程技术 Q1 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS

Computers and Geotechnics Pub Date : 2025-06-11 DOI:10.1016/j.compgeo.2025.107404

Amit Singh, Himanshu Saurav, Manash Chakraborty

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引用次数: 0

摘要

本研究试图了解应力相关的渗透性和压缩性对非达西流动和斜坡荷载作用下粘土固结的综合影响。采用了Crank-Nicolson格式来预测数值解。分析了两种水力边界条件：透水顶部透水底部（PTPB）和透水顶部不透水底部（PTIB）。将e-log和e-log σ变化曲线的线性变化考虑为指数流规律和阈值梯度流规律，形成了广义方程。e - log的斜率似乎对控制耗散率有很大的影响。固结曲线是由不同的加载速率、非达西流动参数、渗透率和压缩性指标以及排水条件所产生的。通过绘制渗透率的时空变化来解释固结曲线的变化。使用先前发布的解决方案验证了结果。

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Combined effect of stress-dependent permeability, ramp loading, and non-Darcian flow on the one-dimensional consolidation

This study has attempted to understand the combined effect of stress-dependent permeability and compressibility on the consolidation of clays subjected to non-Darcian flow and ramp loading. The Crank-Nicolson scheme has been employed to predict the numerical solutions. The solution is analyzed for two hydraulic boundary conditions: pervious top pervious bottom (PTPB) and pervious top impervious bottom (PTIB). The generalized equation is formed by considering the linear variation of the e–logk and e–log σ ׳ curves with exponential and threshold-gradient-based flow laws. The slope of the e–logk appears to be highly influential in governing the dissipation rates. The consolidation curves are produced by varying the loading rates, non-Darcian flow parameters, permeability and compressibility indices, and drainage conditions. The spatial and temporal variation of permeability are plotted to explain the variation in the consolidation curves. The results are validated with the previously published solutions.

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来源期刊

Computers and Geotechnics 地学-地球科学综合

CiteScore

9.10

自引率

15.10%

发文量

438

审稿时长

45 days

期刊介绍： The use of computers is firmly established in geotechnical engineering and continues to grow rapidly in both engineering practice and academe. The development of advanced numerical techniques and constitutive modeling, in conjunction with rapid developments in computer hardware, enables problems to be tackled that were unthinkable even a few years ago. Computers and Geotechnics provides an up-to-date reference for engineers and researchers engaged in computer aided analysis and research in geotechnical engineering. The journal is intended for an expeditious dissemination of advanced computer applications across a broad range of geotechnical topics. Contributions on advances in numerical algorithms, computer implementation of new constitutive models and probabilistic methods are especially encouraged.