摘要
室内振动压实机械参数对道路材料压实效果有直接影响,开展压实能量与室内振动压实机械参数关系研究对制定合理压实方法有重要意义。文章对水泥稳定碎石进行了室内压实试验,结合机械—土弹跳模型计算振动压实能量,阐明了机械参数变化过程中振动压实能量和激振力的变化规律,分析了压实密度与压实机能量的关系以及机械参数对压实能量的影响。结果表明:振动能量可以较好的反映压实能力,振动压实能量宜大于30 J;压实能量随振动频率和激振力的增大而先增大后减小,偏心角增大导致最大振动压实能量降低而最佳激振力不变,偏心块夹角应小于90°,当偏心块夹角增大时,需提高振动频率和减少配重,振动频率范围为24~32 Hz;压实机械的激振力随频率的提高而增大,激振力5000~7000 N为最佳范围。
Mechanical parameters have direct influence on the road material compaction effect, confirming the influence of mechanical parameters is the basis of reasonable indoor vibration compaction method. The indoor vibrate compaction was carried out, and the vibrate compaction energy was calculated based on bounce model, the relation between compaction effect and compaction energy was analyzed, and the relation between compaction energy and mechanical parameter was researched in further. The results show that vibration energy can reflect the compaction effect better, and that vibration compaction energy should be greater than 30 J. With the increase of vibration frequency and vibration force, the maximum compaction energy increases first and then decreases, under some cases it may increase again. The maximum vibration compaction energy will decease while the best exciting force will remain with the increase of eccentric block angle. The eccentric block angle should be less than 90°, and if the eccentric block angle becomes lager, the frequency should be higher and the balancing weight should be reduced. The normal frequency is 24 Hz 32 Hz. The exciting force increases with the increase of vibrate frequency, and 5000 -7000 N is reasonable exciting force range.
出处
《山东建筑大学学报》
2017年第3期225-229,244,共6页
Journal of Shandong Jianzhu University
基金
山东建筑大学博士基金项目(0000601523)
关键词
振动压实
压实能量
偏心块夹角
激振力
vibration compaction
compaction energy
eccentric block angle
exciting force
