湿度变化对黄土微观结构的影响研究

曹磊; 杨利国; 吴江; 张晓聪

doi:10.20265/j.cnki.issn.1007-2993.2024-0205

湿度变化对黄土微观结构的影响研究

doi: 10.20265/j.cnki.issn.1007-2993.2024-0205

曹磊^1,,
杨利国^{1, 2},
吴江³,
张晓聪³

1.
黄河水利职业技术学院，河南开封　475004
2.
开封市岩土灾害防治工程技术研究中心，河南开封　475004
3.
西安理工大学土木建筑工程学院，陕西西安　710048

基金项目: 2023年开封市科技发展计划（科技攻关项目：2303056）

详细信息

作者简介:
曹　磊，男，1978年生，硕士，副教授，主要从事土木工程专业教学和科研工作。E-mail：20303051@qq.com

中图分类号: TU411
计量
- 文章访问数: 11
- HTML全文浏览量: 4
- PDF下载量: 3
- 被引次数: 0
出版历程
- 收稿日期: 2024-05-14
- 修回日期: 2024-10-14
- 录用日期: 2024-10-29
- 刊出日期: 2025-06-09

The influence of humidity changes on the microstructure of loess

1.
Yellow River Conservancy Technical Institute, Kaifeng 475004, Henan, China
2.
Engineering Technology Research Center on Geotechnical Disaster Prevention and Control of Kaifeng, Kaifeng 475004, Henan, China
3.
School of Civil and Architectural Engineering, Xi’an University of Technology, Xi’an 710048, Shaanxi, China

摘要

摘要: 原状黄土具有显著的水敏性特征，为探究含水率变化对原状黄土微观结构的影响，通过多个含水率条件下原状黄土的扫描电镜试验，对黄土的微观特征进行定性分析；通过IPP6.0软件对SEM图像进行了二值化处理，对原状黄土的孔隙面积、孔隙直径、孔隙形态与孔隙角度分布规律进行了定量描述；利用皮尔森相关性分析方法对原状黄土含水率与微观结构指标进行了相关性分析。结果表明：含水率变化会显著影响黄土的颗粒形态与孔隙分布特征，表现为总孔隙面积、大孔隙面积、平均孔径、圆度和凸度随含水率的增大而增大，孔隙概率熵随含水率增大而减小。
- 原状黄土 /
- 湿度 /
- 微观结构 /
- 相关性分析
Abstract: Undisturbed loess has significant water sensitivity characteristics. To explore the influence of moisture content change on the microstructure of undisturbed loess, scanning electron microscopy tests of undisturbed loess under multiple moisture content conditions were carried out, and the microscopic characteristics of loess was qualitatively analyzed. The SEM images were binarized using IPP6.0 software to quantitatively describe the pore area, pore diameter, pore morphology, and pore angle distribution of undisturbed loess. The Pearson correlation analysis method was used to analyze the correlation between the moisture content and microstructure indicators of undisturbed loess. The results show that changes in moisture content significantly affect the particle morphology and pore distribution characteristics of loess, manifested as an increase in total pore area, large pore area, average pore size, roundness and convexity, and moisture content with increasing moisture content, while the probability entropy of pores decreases with increasing moisture content.
- undisturbed loess /
- humidity /
- microstructure /
- correlation analysis

HTML全文

图 1 黄土颗粒级配曲线

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图 2 扫描电镜仪（JSM-6700F）

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图 3 试样制备与试验过程

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图 4 黄土SEM与二值化图像（A:单粒结构，B：团粒结构，C：絮状结构）

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图 5 黄土SEM二值化图像

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图 6 孔隙面积分布条形图

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图 7 黄土孔径分布散点图

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图 8 不同含水率黄土的平均孔径点线图

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图 9 黄土孔隙形态变化点线图

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图 10 孔隙角度分布玫瑰图

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图 11 相关性分析热点图

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表 1 基本物性指标

密度ρ/
（g·cm⁻³）比重
G_s 含水率
w/% 液限
w_L/% 塑限
w_P/% 塑性指数
I_P

1.36 2.70 22.0 39 25 14

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表 2 黄土孔隙概率熵

含水率w 5% 10% 15% 20% 25% 36%

孔隙概率熵值H_m 0.8464 0.8086 0.8564 0.8216 0.6690 0.6798

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