垂直振动压路机滚轮-土壤动力学模型的台架试验
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摘要
为研究垂直振动压路机滚轮压实过程中垂直振动加速度与土壤参数之间的关系,根据二自由度"压路机-土壤"动力学模型搭建小型垂直振动压实试验台,分析了滚轮的垂直振动加速度与试验台刚度、阻尼之间的变化规律。结果表明:随着试验台刚度增加、阻尼减小,垂直振动加速度不断增加,说明垂直振动加速度随土壤密实程度增加而增加;二者呈正相关关系,可用于在线检测压实度。
In order to study the relationship between vertical vibration acceleration and soil parameters in the process of compaction by vertical vibration roller,a small test bench vertical vibration compaction was built based on a two-degree-of-freedom drum-soil dynamic model,and the variation law between vertical vibration acceleration of roller and stiffness and damping of the test bench was analyzed.The results show that the vertical vibration acceleration increases with the increase of the stiffness and the decrease of the damping of the test bench,which indicates that the vertical vibration acceleration increases with the increase of the soil compactness,and there is a positive correlation between them,which can be used to detect the compactness online.
In order to study the relationship between vertical vibration acceleration and soil parameters in the process of compaction by vertical vibration roller,a small test bench vertical vibration compaction was built based on a two-degree-of-freedom drum-soil dynamic model,and the variation law between vertical vibration acceleration of roller and stiffness and damping of the test bench was analyzed.The results show that the vertical vibration acceleration increases with the increase of the stiffness and the decrease of the damping of the test bench,which indicates that the vertical vibration acceleration increases with the increase of the soil compactness,and there is a positive correlation between them,which can be used to detect the compactness online.
引文
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[13]郭军卫,李军,周志立.振动压路机压实度检测及分析[J].建筑机械,2007,27(8):86-89.
[2] XU Q,CHANG G K.Evaluation of Intelligent Compaction for Asphalt Materials[J].Automation in Construction,2013,30:186-198.
[3]张青哲,杨人凤,戴经梁.振动压路机-土壤系统动力学模型及分析[J].建筑机械,2009,29(11):98-101.
[4]向亮.振动压路机振动加速度与土壤压实度关系的分析[D].重庆:重庆交通大学,2012.
[5]宋皓,李彦伟,陈立明,等.垂直振动压路机及其在厚层压实中的应用[J].筑路机械与施工机械化,2016,33(10):36-40.
[6] HU W,HUANG B,SHU X,et al.Utilising Intelligent Compaction Meter Values to Evaluate Construction Quality of Asphalt Pavement Layers[J].Road Materials and Pavement Design,2017,18(4):273-278.
[7]姚运仕.双频合成振动压实方法的试验研究[D].西安:长安大学,2006.
[8]谢欣然.振动加速度与土壤压实状况关系分析[D].重庆:重庆交通大学,2009.
[9] SHULER S,NOBE M D.Edge Cracking in Residential Development Hot Mix Asphalt Pavements[J].International Journal of Construction Education and Research,2007,3:179-197.
[10] MEEHAN C L,CACCOLA D V,TEHRABI F S,et al.Assessing Soil Compaction Using Continuous Compaction Control and Location-specific in Situ Tests[J].Automation in construction,2017,73(1):31-44.
[11] CLEAVE R,LISA R.Intelligent Compaction Makes an Impact in Utah[J].The Asphalt Contractor,2013,27(1):22-25.
[12]张润利,刘剑,肖艳军.振动压路机路基土壤系统的数学模型[J].中国工程机械学报,2004,2(2):171-175.
[13]郭军卫,李军,周志立.振动压路机压实度检测及分析[J].建筑机械,2007,27(8):86-89.