| 高液限红粘土变形特性研究 |
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| 引用本文： | 陈开圣,胡鑫.高液限红粘土变形特性研究[J].公路交通科技,2010,27(3). |
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| 作者姓名： | 陈开圣 胡鑫 |
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| 作者单位： | 贵州大学,土木建筑工程学院,贵州,贵阳,550003 |
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| 基金项目： | 贵州省社会发展攻关项目(20083014);;贵州大学引进人才项目(x065004) |
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| 摘 要： | 为了研究红粘土路基的沉降特性,基于一维室内固结试验,分析了高液限红粘土变形特性。引入压缩变形系数,分析了高液限红粘土的物理指标对变形指标的影响,采用应变法来表达压缩变形曲线结果。引入非线性应力、应变关系的割线模量,研究了高液限红粘土的加荷本构模型和增(减)湿本构模型。结果表明:压缩变形系数随含水量的增大而增加,当含水量大于最佳含水量2%~3%后,压缩变形系数随含水量的增加增长幅度迅速变大;压实度越大,压缩变形系数越小,低压实度高含水量的情况下,压缩变形系数显著增大;压缩系数随含水量的增加而增大,压缩系数随压实度的增大而减小;高液限红粘土的应力-应变关系可以用幂函数的形式来表达。提出了高液限红粘土加荷本构模型和增(减)湿本构模型,该模型具有较高的可靠性,为研究红粘土路基沉降特性提供了有力依据。
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| 关 键 词： | 道路工程 变形特性 压缩试验 高液限红粘土 本构模型 |
Study of Deformation Characteristic for High Liquid Limit Red Clay |
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| CHEN Kaisheng,HU Xin.Study of Deformation Characteristic for High Liquid Limit Red Clay[J].Journal of Highway and Transportation Research and Development,2010,27(3). |
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| Authors: | CHEN Kaisheng HU Xin |
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| Institution: | College of Civil Engineering and Building Construction;Guizhou University;Guiyang Guizhou 550003;China |
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| Abstract: | In order to analyze the settlement characteristics of red clay subgrade,based on one-dimensional indoor consolidation tests,the deformation characteristics of high liquid limit red clay were analyzed.By introducing the compression deformation coefficient,the influence of physical indexes on deformation indexes was discussed.The compression deformation curves were expressed with the strain method.By introducing the secant modulous of nonlinear stress-strain relation,the loading constitutive model and moisten... |
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| Keywords: | road engineering deformation characteristic compression test high liquid limit red clay constitutive model |
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