首页|基于黏粒含量的黄河下游堤防土水特征曲线预测研究

基于黏粒含量的黄河下游堤防土水特征曲线预测研究

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  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
通过探究黄河下游堤防在不同围压下的土水特征曲线,为汛期堤防安全预报预警提供实时建议.通过分析黄河下游堤防土体黏粒含量与土水特征曲线的关系,提出以黏粒含量及干密度为主要因素的简易参数模型,并基于该模型进一步研究了不同围压条件下土水特征曲线的测算方法.结果表明:黄河下游堤防土体的土水特征曲线根据黏粒含量的不同呈现不同的特点,脱湿曲线可根据黏粒含量分为不同的区域,黏粒含量越大,滞回效应越显著;简易模型对于黏粒含量为 20%以上的壤土或黏土的脱湿曲线适用性较好;随着围压的增大,相同含水量对应的基质吸力逐渐增大.模型引入与围压相关的参数c,可实现不同荷载下的黄河下游堤防土水特征曲线预测.
Prediction of Soil-Water Characteristic Curve(SWCC)of Embankments in Lower Yellow River Based on Clay Content
In order to provide real-time suggestions for the safety of the lower Yellow River embankment,it was imperative to conduct a quan-titative analysis of the SWCC for the Lower Yellow River embankments soils under varying confining stress conditions.By analyzing the rela-tionship between clay content and SWCC of the embankment soil,a simple parameter model based on clay content and dry density was pro-posed.This model was then utilized to examine the SWCC under various confining pressures.The findings indicate that the SWCC exhibits distinct characteristics corresponding to varying clay content.Dehydration curves can be demarcated into different regions based on clay con-tent,with an increase in clay content correlating positively with the magnitude of the hysteresis effect observed.The simple model based on clay content exhibits a good applicability to the dehydration curve of loamy and clayey soils with clay fractions exceeding 20%.As confining stress intensifies,the matrix suction associated with a given water content incrementally rises.The parameter c,associated with confining pressure,has been incorporated into the model,enabling the prediction of SWCC for the Lower Yellow River embankment under different load conditions.

SWCCclay contentconfining pressureLower Yellow River embankment

朱振慧、赵连军、张防修、黄李冰

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黄河水利科学研究院 水利部黄河下游河道与河口治理重点实验室,河南 郑州 450003

四川大学 水力学与山区河流开发保护国家重点实验室,四川 成都 610000

土水特征曲线 黏粒含量 围压 黄河下游堤防

国家重点研发计划项目国家重点研发计划项目国家自然科学基金资助项目国家自然科学基金资助项目中央级公益性科研院所基本科研业务费专项中央级公益性科研院所基本科研业务费专项

2021YFC3200405-022023YFC3206201U2243219U2243221HKY-JBYW-2023-21HKF202203

2024

10.3969/j.issn.1000-1379.2024.10.010

人民黄河
水利部黄河水利委员会

人民黄河

CSTPCD北大核心
影响因子：0.494
ISSN：1000-1379
年,卷(期)：2024.46(10)
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