| 非饱和黄土非线性K-G模型试验研究 |
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| 引用本文： | 胡再强,马素青,李宏儒,赵凯,田园.非饱和黄土非线性K-G模型试验研究[J].岩土力学,2012,33(Z1):56-60. |
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| 作者姓名： | 胡再强 马素青 李宏儒 赵凯 田园 |
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| 作者单位： | 西安理工大学 岩土工程研究所，西安 710048 |
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| 基金项目： | 国家自然科学基金资助项目(No.50778152) |
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| 摘 要： | K-G模型较之E-μ模型有较好的优越性，每个参数都能与土的剪切模量或体变模量直接联系，便于岩土工程的非线性理论和计算分析。以西部甘肃永登非饱和黄土为研究对象，进行大量不同湿度下的非饱和黄土常规三轴试验，获得不同初始饱和度下的K-G模型参数，进一步研究这些参数随初始饱和度的变化规律，建立模型参数和初始饱和度的相关表达式。在实际工程中，用测得的非饱和黄土的湿度指标，就可以得到黄土的K-G模型参数进行非饱和黄土的增湿数值模拟计算分析，避免吸力的量测和计算，具有一定的工程实际应用价值。
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| 关 键 词： | 非饱和黄土 K-G模型 初始饱和度 |
| 收稿时间： | 2012-05-08 |
Experimental study of nonlinear K-G model for unsaturated loess |
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| HU Zai-qiang,MA Su-qing,LI Hong-ru,ZHAO Kai,TIAN Yuan.Experimental study of nonlinear K-G model for unsaturated loess[J].Rock and Soil Mechanics,2012,33(Z1):56-60. |
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| Authors: | HU Zai-qiang MA Su-qing LI Hong-ru ZHAO Kai TIAN Yuan |
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| Institution: | Institute of Geotechnical Engineering, Xi’an University of Technology, Xi’an 710048, China |
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| Abstract: | The K-G model is much better than E-μ model for its each parameter directly contacts with soil modulus and convenient for the nonlinear theory and calculation analysis of geotechnical engineering.Taking the Yongdeng unsaturated loess in Western Gansu as the object of study,a large number of unsaturated loess conventional triaxial tests under different humidities is carried out;and then different initial saturations under the K-G model parameters are obtained,the change rule of these parameters with different initial saturations is studied.The relevant expressions of model parameters and initial saturation are established.So that in actual project,using the measured unsaturated loess humidity indicator,we can get the unsaturated loess parameters of K-G model for moistening numerical simulation analysis and avoid suction measurement and calculation.The result has a certain practical value. |
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| Keywords: | unsaturated loess K-G model initial saturation |
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