理论与试验研究

环境湿度与干湿循环对压实黄土裂隙发育影响研究

  • 梅源 ,
  • 余雅楠 ,
  • 田新宇 ,
  • 张轩宁
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  • 西安建筑科技大学 土木工程学院,西安 710055
梅源(1983—),男,河南信阳人,博士,教授,主要从事土木工程施工与管理方向的教学与科研工作。E-mail: meiyuan@xauat.edu.cn
余雅楠(1999—),女,陕西商洛人,硕士,主要从事特殊土工程致灾机理及控制理论的研究工作。E-mail: remy10110902@163.com

收稿日期: 2025-09-06

  网络出版日期: 2026-09-07

基金资助

国家自然科学基金(52178302)

Effects of Environmental Humidity and Dry-Wet Cycle on Crack Development of Compacted Loess

  • Mei Yuan ,
  • Yu Yanan ,
  • Tian Xinyu ,
  • Zhang Xuanning
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  • School of Civil Engineering, Xi' an University of Architecture and Technology, Xi' an 710055, P.R. China

Received date: 2025-09-06

  Online published: 2026-09-07

摘要

为了研究环境湿度与干湿循环对压实黄土裂隙发育的影响,借助人工气候箱模拟自然气候环境,开展不同环境湿度和干湿循环下的压实黄土裂隙发育正交试验,利用数字图像处理技术,揭示不同环境湿度和干湿循环作用下压实黄土裂隙的演化规律。结果表明:干湿循环作用下压实黄土裂隙呈现显著的阶段性增长趋势,即裂隙发育萌生期、快速增长期和稳定期;受干密度变化的影响,土体内部黏聚力及“杂点”出现频率具有显著差异,土体裂隙指标变化规律明显,裂隙总长度、裂隙率及分形维数均随干密度增大有减小的趋势;裂隙演化与土体蒸发效应密切相关,而湿度变化与土体蒸发效应具有直接联系,故湿度变化对裂隙总长度、裂隙率、裂隙均宽、分形维数以及方向性均有一定影响,尤其是裂隙均宽,高湿度促进裂隙沿宽度方向扩张。研究成果可为黄土高填方地基等实际工程的设计和施工提供参考。

本文引用格式

梅源 , 余雅楠 , 田新宇 , 张轩宁 . 环境湿度与干湿循环对压实黄土裂隙发育影响研究[J]. 地下空间与工程学报, 2026 , 22(4) : 1216 -1230 . DOI: 10.20174/j.JUSE.2026.04.11

Abstract

To investigate the effects of environmental humidity and wet-dry cycles on crack development in compacted loess, an artificial climate chamber was used to simulate natural climatic conditions. Orthogonal experiments were conducted to study crack development in compacted loess under varying environmental humidity and wet-dry cycles. Digital image processing techniques were employed to reveal the evolution patterns of cracks under different environmental humidity and wet-dry cycle conditions. The results indicate that: Under wet-dry cycles, cracks in compacted loess exhibit a distinct phased growth trend, namely the crack initiation stage, rapid growth stage, and stabilization stage. Influenced by changes in dry density, the internal cohesion and the frequency of "impurity points" show significant differences, while the crack development indicators exhibit clear patterns. The total crack length, crack ratio, and fractal dimension all tend to decrease with increasing dry density. Crack evolution is closely related to the evaporation effect of the soil, and humidity changes are directly linked to the evaporation effect. Therefore, humidity variations have a certain impact on the total crack length, crack ratio, average crack width, fractal dimension, and directionality, particularly on the average crack width, where high humidity promotes crack expansion in the width direction. These findings provide a foundation for further research on the service performance of loess high-fill foundations under crack propagation effects and offer references for the design and construction of loess high-fill foundations in practical engineering projects influenced by climatic conditions.

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