A hydromechanical model for unsaturated soils based on state boundary hypersurface

IF 5.6 1区工程技术 Q1 ENGINEERING, GEOLOGICAL

Acta Geotechnica Pub Date : 2024-09-14 DOI:10.1007/s11440-024-02390-0

Dongjie Hua, Guohua Zhang, Ruyan Liu, Qinghui Jiang

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Abstract

This paper presents an elastoplastic model to estimate the hydromechanical behavior of unsaturated soils based on state boundary hypersurface. Through mechanical hypersurface, the influence of saturation on yield stress can be expressed in a full form rather than an incremental form. Two hydraulic hypersurfaces and one mechanical hypersurface are proposed to establish the model. Two hydraulic hypersurfaces, composed of degree of saturation, void ratio and matrix suction, define the plastic hydraulic boundary. The elastic hydraulic behavior of unsaturated soils can be represented by scanning lines between these two hydraulic hypersurfaces. The mechanical hypersurface, composed of degree of saturation, void ratio and effective stress, defines the plastic mechanical boundary. The elastic mechanical behavior of unsaturated soils can be represented by scanning lines below the mechanical hypersurfaces. A large number of laboratory tests are used to validated the proposed model, showing that it can reasonably capture important features of the hydromechanical behavior of unsaturated soils.

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基于状态边界超表面的非饱和土壤水力学模型

本文提出了一种基于状态边界超表面的弹塑性模型，用于估算非饱和土壤的水力学行为。通过力学超表面，饱和度对屈服应力的影响可以用完全形式而不是增量形式来表示。提出了两个水力超表面和一个力学超表面来建立模型。由饱和度、空隙率和基质吸力组成的两个水力超表面定义了塑性水力边界。这两个水力超表面之间的扫描线可代表非饱和土壤的弹性水力行为。由饱和度、空隙率和有效应力组成的力学超表面定义了塑性力学边界。非饱和土壤的弹性力学行为可用力学超表面下方的扫描线表示。大量的实验室试验验证了所提出的模型，表明该模型能够合理地捕捉非饱和土壤水力学行为的重要特征。

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

Acta Geotechnica ENGINEERING, GEOLOGICAL-

CiteScore

9.90

自引率

17.50%

发文量

297

审稿时长

4 months

期刊介绍： Acta Geotechnica is an international journal devoted to the publication and dissemination of basic and applied research in geoengineering – an interdisciplinary field dealing with geomaterials such as soils and rocks. Coverage emphasizes the interplay between geomechanical models and their engineering applications. The journal presents original research papers on fundamental concepts in geomechanics and their novel applications in geoengineering based on experimental, analytical and/or numerical approaches. The main purpose of the journal is to foster understanding of the fundamental mechanisms behind the phenomena and processes in geomaterials, from kilometer-scale problems as they occur in geoscience, and down to the nano-scale, with their potential impact on geoengineering. The journal strives to report and archive progress in the field in a timely manner, presenting research papers, review articles, short notes and letters to the editors.