振动压实工艺压实能力与道路基层材料可压实性评价

Assessment of Vibration Compaction Process Compaction Ability and Road-base Materials Compacted Property

摘要:

采用传感器对振动成型基层材料的塑性变形、振动加速度和压实力进行了采集，通过振动三参数对振动压实工艺输出能量的分析，定义了评价振动压实工艺压实能力的评价参数-激振强度；通过对基层材料振动压实塑性变形曲线的分析，定义了被压材料可压实性评价参数—可压实性系数；对典型道路材料的可压实性进行了对比研究；结果表明，对压实效果的影响上，当激振强度大于3.5时，振动压实工艺才具有较强的压实能力；材料的振动压实塑性变形与振动时间呈对数关系，在振动压实的50s以后，塑性变形处于稳定状态；在材料可压实性方面，沥青混合料的可压实性最差，二灰结合料可压实最好，基层材料的可压实性基本处于同一水平。研究结果表明，以振动压实工艺单位时间内输出的能量和道路材料产生单位塑性变形所需的压实力来评价振动工艺的压实能力与被压材料可压实性是合理的。

Abstract:

Road base materials plastic deformation, vibration acceleration and pressure power was acquisition by adpoting sensors in vibration molding process, through the output energy analysis of three parameters vibration compaction process, defined vibration compaction process compaction of ability evaluation parameters-vibration intensity E1; Through analysis of the materials vibration compaction plastic deformation curve, defined the compaction assessment index of road base materials- compaction coefficient L; Comparative study was carried out between different road base materials; The result shows that when the vibration intensity is greater than 3.5, the vibration compaction process just have strong compaction ability; There is a logarithmic relationship between vibration compaction plastic deformation and vibration time ,when vibration compaction after 50 seconds later, plastic deformation was in a stable state; In road materials can be compaction, asphalt mixture compacted ability is the worst, the fly ash and lime combining materials compacted ability is the best, the road base materials compacted ability are basicly at the same level. The results of the study show that, it is reasonable to evaluate the compaction ability of vibration compaction process and road materials compacted ability using vibration intensity E1 and compaction coefficient L.