原状黄土土水特征曲线拟合方法研究 |
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引用本文: | 郭鸿,陈茜,陈栋梁,李军. 原状黄土土水特征曲线拟合方法研究[J]. 人民长江, 2016, 47(19): 92-95. DOI: 10.16232/j.cnki.1001-4179.2016.19.018 |
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作者姓名: | 郭鸿 陈茜 陈栋梁 李军 |
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作者单位: | 陕西理工大学 土木工程与建筑学院,陕西 汉中,723000 |
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基金项目: | 陕西省教育厅专项科研计划项目(15JK1117) |
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摘 要: | 为了探索原状黄土土水特征曲线的拟合方法,采用已有的经典拟合方法对宝鸡、岐山和杨凌3个地区的原状黄土的土水特征曲线(SWCC)进行了拟合,并和室内基质吸力压力板减湿试验结果进行了对比。结果表明,FredlundXing,Van Genuchten和BrooksCorey三种拟合方法都可以较好地反映原状黄土的SWCC,而van GenuchtenBurdine和van GenuchtenMualem两种方法由于残余含水率和实际差别过大,并不适合描述原状黄土的SWCC。最后建议了一种简单而又适合实际工程采用的SWCC拟合公式,并通过试验验证了其可行性。
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关 键 词: | 土水特征曲线 拟合模型 非饱和土 原状黄土 |
Study on soil-water characteristics curve fitting for undisturbed loess soil |
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Abstract: | In order to explore the fitting approach for SWCC of undisturbed loess, the SWCC of loess soil samples in Baoji, Qishan and Yangling were fitted through 5 conventional fitting methods, and also results of indoor dehumidification experiment of matric suction pressure plate were compared with the fitting data. The results show that Fredlund & Xing, van Genuchten and Brooks&Corey fitting methods can better reflect undisturbed loess SWCC, while van Genuchten&Burdine ( VGB) and van Ge-nuchten &Mualem ( VBM) are not suitable for describing undistributed loess SWCC as their residual moisture contents are differ-ent from practical condition. Finally, a simple and practical engineering SWCC prediction formula was proposed and verified by tests. |
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Keywords: | SWCC fitting model unsaturated soil undisturbed loess |
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