| 重复荷载下粉性路基土永久变形特性和预估模型 |
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| 引用本文： | 丛林,郭忠印,高启聚,张洪亮.重复荷载下粉性路基土永久变形特性和预估模型[J].公路交通科技,2010,27(4). |
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| 作者姓名： | 丛林 郭忠印 高启聚 张洪亮 |
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| 作者单位： | 1. 同济大学,道路与交通工程教育部重点实验室,上海,200092
2. 长安大学,公路学院,陕西,西安,710064 |
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| 基金项目： | 国际科技合作项目(2009DFA81630) |
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| 摘 要： | 以动三轴试验模拟行车荷载下沥青路面路基土长期受力状态,测试加载104次粉性路基土在3种含水量、2种压实度和3种偏应力条件下的永久塑性应变曲线,量化其对路基永久变形的影响程度。大量调研和试验数据拟合分析表明Tseng-Lytton本构模型可预估粉性路基土累计永久应变。利用上述试验结果进一步回归给出了该本构模型中参数与粉性土基本指标含水量和回弹模量的计算公式,从而得到粉性路基土的永久应变预估模型,该本构模型可用于柔性基层沥青路面车辙分析。
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| 关 键 词： | 道路工程 永久变形 动三轴试验 粉性路基土 |
Permanent Deformation Characteristics and Prediction Model of Silty Subgrade Soil under Repeated Loading |
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| CONG Lin,GUO Zhongyin,GAO Qiju,ZHANG Hongliang.Permanent Deformation Characteristics and Prediction Model of Silty Subgrade Soil under Repeated Loading[J].Journal of Highway and Transportation Research and Development,2010,27(4). |
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| Authors: | CONG Lin GUO Zhongyin GAO Qiju ZHANG Hongliang |
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| Institution: | 1.Key Laboratory of Road and Traffic Engineering of MOE;Tongji University;Shanghai 200092;China;2.School of Highway;Chang'an University;Xi'an Shaanxi 710064;China |
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| Abstract: | By using dynamic tri-axial testing,permanent plastic strain curves of silty subgrade soil under 104 repeated loading were tested with three water content levels,two compaction degree levels and three deviator stress levels.The effect of the above mentioned factors on permanent subgrade deformation were compared in quantity.A large number of literal investigation and testing data regression analysis show that Tseng and Lytton's constitutive model can successfully predict accumulative permanent deformation of... |
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| Keywords: | road engineering permanent deformation dynamic tri-axial test silty subgrade soil |
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