Semi-Analytical Solution for One-Dimensional Nonlinear Consolidation of Multilayered Soil Considering Self-Weight and Boundary Time Effect

IF 3.4 2区工程技术 Q2 ENGINEERING, GEOLOGICAL International Journal for Numerical and Analytical Methods in Geomechanics Pub Date : 2024-09-19 DOI:10.1002/nag.3839

Mengfan Zong, Jing Zhang, Wenbing Wu, Ziye Yu, Yi Zhang, Guoxiong Mei

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Abstract

The self-weight stress in multilayered soil varies with depth, and traditional consolidation research seldom takes into account the actual distribution of self-weight stress, resulting in inaccurate calculations of soil consolidation and settlement. This paper presents a semi-analytical solution for the one-dimensional nonlinear consolidation of multilayered soil, considering self-weight, time-dependent loading, and boundary time effect. The validity of the proposed solution is confirmed through comparison with existing analytical solutions and finite difference solution. Based on the proposed semi-analytical solution, this study investigates the influence of self-weight, interface parameter, soil properties, and nonlinear parameters on the consolidation characteristics of multilayered soil. The results indicate that factoring in the true distribution of self-weight leads to a faster dissipation rate of excess pore water pressure and larger settlement and settlement rate, compared to not considering self-weight. Both boundary drainage performance and soil nonlinearity have an impact on consolidation. If the boundary drainage capacity is inadequate, the influence of soil nonlinearity on consolidation diminishes.

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考虑自重和边界时间效应的多层土一维非线性固结的半解析解

多层土中的自重应力随深度变化而变化，传统的固结研究很少考虑自重应力的实际分布，导致土壤固结和沉降计算不准确。本文提出了多层土一维非线性固结的半解析解，考虑了自重、随时间变化的荷载和边界时间效应。通过与现有的分析解法和有限差分解法进行比较，证实了所提解法的有效性。基于所提出的半解析解，本研究探讨了自重、界面参数、土壤特性和非线性参数对多层土壤固结特性的影响。结果表明，与不考虑自重相比，考虑自重的真实分布会导致过剩孔隙水压力消散速度加快，沉降量和沉降速度增大。边界排水性能和土壤非线性对固结都有影响。如果边界排水能力不足，土壤非线性对固结的影响就会减弱。

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来源期刊

International Journal for Numerical and Analytical Methods in Geomechanics 工程技术-材料科学：综合

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.