Nonlinear regression modeling of swelling characteristics in cracked expansive soil: integrating crack, moisture, density, and load effect

IF 2.6 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Frontiers in Materials Pub Date : 2024-09-05 DOI:10.3389/fmats.2024.1467134
Junkai Yao, Degou Cai, Ke Su, Hongye Yan
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Abstract

Expansive soils, known for their significant volume change with variations in moisture content, are widely distributed around the globe. Due to their swelling properties, expansive soils pose significant engineering challenges, especially in rapidly developing countries like China. This study aims to investigate the swelling mechanisms of expansive soils, focusing on the influence of crack characteristics on swelling behavior. The research methodology includes field investigations, laboratory experiments, and theoretical modeling. By comprehensively considering crack rate, dry density, initial moisture content, and overburden load, a nonlinear regression swelling model is proposed in this research. The degree of crack development in expansive soils is quantitatively characterized by the content of filling materials, leading to the establishment of a crack rate model for expansive soils. Swelling tests on expansive soils with different crack contents were conducted. The results show that the swelling rate is negatively correlated with the initial moisture content and positively correlated with dry density and crack rate. Additionally, the larger the crack rate, the more significant the change in the swelling rate. Furthermore, model validation confirms that this nonlinear regression model accurately describes the relationship between swelling rate and influencing factors. It offers a more precise prediction tool for infrastructure design and maintenance in expansive soil areas, advancing geotechnical engineering practices.
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开裂膨胀土膨胀特性的非线性回归建模:综合裂缝、水分、密度和荷载效应
膨胀土因其体积随含水量变化而显著变化而闻名,广泛分布于全球各地。由于其膨胀特性,膨胀土给工程设计带来了巨大挑战,尤其是在像中国这样快速发展的国家。本研究旨在探究膨胀土的膨胀机理,重点关注裂缝特征对膨胀行为的影响。研究方法包括实地调查、实验室实验和理论建模。综合考虑裂缝速率、干密度、初始含水量、覆土荷载等因素,提出了非线性回归膨胀模型。根据填充材料的含量对膨胀土的裂缝发展程度进行了定量表征,从而建立了膨胀土的裂缝速率模型。对不同裂缝含量的膨胀土进行了膨胀试验。结果表明,膨胀率与初始含水量呈负相关,与干密度和裂缝率呈正相关。此外,裂缝率越大,膨胀率的变化越明显。此外,模型验证证实,该非线性回归模型准确地描述了膨胀率与影响因素之间的关系。它为膨胀土地区的基础设施设计和维护提供了更精确的预测工具,推动了岩土工程实践的发展。
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来源期刊
Frontiers in Materials
Frontiers in Materials Materials Science-Materials Science (miscellaneous)
CiteScore
4.80
自引率
6.20%
发文量
749
审稿时长
12 weeks
期刊介绍: Frontiers in Materials is a high visibility journal publishing rigorously peer-reviewed research across the entire breadth of materials science and engineering. This interdisciplinary open-access journal is at the forefront of disseminating and communicating scientific knowledge and impactful discoveries to researchers across academia and industry, and the public worldwide. Founded upon a research community driven approach, this Journal provides a balanced and comprehensive offering of Specialty Sections, each of which has a dedicated Editorial Board of leading experts in the respective field.
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