A state surface model of unsaturated soil considering thermal and adsorptive effects

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

Computers and Geotechnics Pub Date : 2024-10-30 DOI:10.1016/j.compgeo.2024.106869

Shuang Liu , Yang Xiao , Yue Sun , Hao Cui , Guoliang Ma , Hanlong Liu

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Abstract

Constructing soil water retention curve model involving thermal, mechanical, and hydraulic hysteresis is essential for accurately predicting the retention characteristics of unsaturated soils under complicated conditions. A novel model depicting the retention of capillary and adsorbed water under the impact of thermal, mechanical, and hydraulic hysteresis, has been proposed. In which, the variations of void ratio-dependent capillary water have been captured based on the incremental relationship of a three-phase porous material and an empirical relationship. The impact of temperature has been described by incorporating two distinct non-isothermal functions for the matric suctions of capillary and adsorbed water. The disparity in soil water retention curves under drying and wetting branches is illustrated by leveraging the combined effect of contact angle and entrapped air. The comparisons between the predicted and measured results showed that the new model can reasonable predict the retention behaviors of unsaturated soils under different temperature, void ratio, and drying-wetting cycles.

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考虑热效应和吸附效应的非饱和土壤状态面模型

要准确预测复杂条件下非饱和土壤的滞留特性，必须构建涉及热滞后、机械滞后和水力滞后的土壤水分滞留曲线模型。我们提出了一个新模型，描述了毛细管水和吸附水在热滞后、机械滞后和水力滞后影响下的滞留情况。其中，根据三相多孔材料的增量关系和经验关系，捕捉了毛细管水随空隙率的变化。通过对毛细管水和吸附水的母吸力采用两种不同的非等温函数来描述温度的影响。通过利用接触角和夹带空气的综合效应，说明了土壤在干燥和湿润分支下的保水曲线差异。预测结果与实测结果的比较表明，新模型可以合理预测非饱和土壤在不同温度、空隙率和干湿循环条件下的保水行为。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.