| 利用3次样条插值确定室内压缩试验先期固结压力 |
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| 引用本文： | 姬付全,经绯,刘志彬,居俊. 利用3次样条插值确定室内压缩试验先期固结压力[J]. 华东交通大学学报, 2011, 0(6): 96-100 |
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| 作者姓名： | 姬付全 经绯 刘志彬 居俊 |
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| 作者单位： | 东南大学交通学院 |
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| 基金项目： | 江苏省交通厅资助项目(09Y33) |
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| 摘 要： | 土的先期固结压力是评价天然地基土的应力历史和固结状态的一项重要指标.基于Casagrande作图,提出了利用分段3次样条插值模型来拟合e-lgp曲线的方法,并编写了模型的计算程序,旨在准确、快捷地确定地基土的先期固结压力.通过算例表明,所提出的曲线模型的拟合度比3次、4次多项式以及著名的Harris模型更高,具有一定的...
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| 关 键 词： | 先期固结压力 e-lgp曲线 3次样条插值 |
Determining Pre-consolidation Pressure of Clays with Cubic Spline Interpolation in Three Consolidation Tests |
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| Ji Fuquan,Jing Fei,Liu Zhibin,Ju Jun. Determining Pre-consolidation Pressure of Clays with Cubic Spline Interpolation in Three Consolidation Tests[J]. Journal of East China Jiaotong University, 2011, 0(6): 96-100 |
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| Authors: | Ji Fuquan Jing Fei Liu Zhibin Ju Jun |
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| Affiliation: | (School of Transportation,Southeast University,Nanjing 210096,China) |
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| Abstract: | Pre-consolidation pressure is an index of deciding the stress history of a soil layer, and is also an important parameter in differentiating the consolidation state of soft soil. Based on Casagrande method, the thought of adopting cubic spline functions to fit e-lgp curve is put forward. Besides, a calculating program of the mathematic model is written, which aims to accurately and quickly obtain pre-consolidation pressure of clays. Finally, two cases are presented. By comparisons and analyses, the fitting degree of this new model is better than that of the cubic and quartic polynomial models and Harris model, which has good engineering applying value. |
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| Keywords: | pre-consolidation pressure e-lg p curve cubic spline interpolation |
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