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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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振动压路机不同参数对土基压实效果的分析
, PP. 1-5
Keywords: 道路工程,土基,有限元,振动压实,压路机参数
Abstract:
为了能从理论上对压实过程进行研究，分析了振动压路机对土基的压实机理及不同的压路机碾压参数对土基压实效果的影响。通过显式时间积分的三维有限元方法，根据土基三轴压缩实验得到的数据采用弹塑性土体动力本构模型，对振动压路机碾压模型的合理性、不同振动频率和行驶速度的压实效果进行了分析。分析结果表明较低的碾压速度会加强表面下0~1m深度内的压实效果，较高的碾压速度会加强表面下1~3m深度内的压实效果；土基的碾压过程中，被压实的层位主要位于表面下的2m深度范围内；较高的碾压频率能达到更深的有效压实深度，但是会造成土基表面应力的显著提升，因此应当在一定范围内实行较高频率碾压。
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