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超薄沥青混凝土磨耗层不仅可以作为预防性养护措施广泛应用于沥青路面、水泥路面、桥面铺装等养护维修工程来恢复路面使用性能,也可以作为表面磨耗层应用于新建路面来提高路表抗滑及排水性能。由于较小的摊铺厚度,超薄磨耗层对施工工艺要求较高,需要严格控制。经等效年度费用法分析,认为超薄磨耗层具有较好的费用效益。 相似文献
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热拌超薄磨耗层是公路预防性养护的有效技术之一,基于某高速超薄磨耗层预防性养护工程,对不同级配进行路用性能试验研究。结果表明,不同级配混合料孔隙率随着2.36 mm筛孔通过率的增加而降低,细集料和矿粉均会填充混合料孔隙而且矿粉的填充效果为细集料的3倍。随着超薄磨耗层级配由粗变密,混合料马歇尔稳定度增加,肯塔堡飞散损失降低,疲劳寿命下降,采用矿粉作为填料的混合料性能显著优于细集料。相关性分析结果表明,超薄磨耗层混合料马歇尔稳定度,飞散损失以及疲劳性能与孔隙率存在较好的相关性,TSR结果与沥青膜厚度存在较好的相关性。超薄磨耗层的设计需要充分考虑孔隙率与沥青膜厚度指标。 相似文献
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结合上海东南郊环高速公路养护管理需要,进行了温拌橡胶沥青开级配超薄磨耗层研究与应用实践。通过试验段设计、施工和效果验证,表明温拌橡胶沥青开级配超薄磨耗层对郊环高速公路具有良好的适用性,其成果可以为今后类似工程的养护提供依据。 相似文献
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为提高旧砼桥面的使用功能,降低行车噪声,依托佛山一环西拓旧路改造工程,分析旧砼桥面铺装改造特点,研究旧砼桥面铺装改造设计方案.采用PG-100型高黏高弹聚合物改性沥青开展新型GT-8高韧超薄铺装材料配合比设计,进行2 cm厚GT-8高韧超薄沥青磨耗层应用研究,并对层间黏结、施工工艺及应用效果进行分析. 相似文献
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高速公路养护中应用超薄磨耗层技术的探析 总被引:1,自引:0,他引:1
随着科学技术的迅速发展和社会经济的不断进步,高速公路养护工作中已经开始尝试应用超薄磨耗层技术。作为一种针对路面性能要求高、交通负载大等高等级道路的路面解决方案,主要应用于有轻微病害的矫正型养护或者水泥路面以及高等级沥青路面的预防性养护工作中,具有抗磨耗、抗车辙、抗滑等性能。以贵州境镇胜段高速公路为例,对超薄磨耗层的施工工艺和技术要求等进行深入的分析。 相似文献
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超薄磨耗层的适用范围及施工注意事项 总被引:1,自引:0,他引:1
通过对超薄磨耗层在高速公路养护中的应用效果的检测与探讨,对超薄磨耗层的适用范围做出了界定,并对超薄磨耗层在施工中的注意事项做了介绍. 相似文献
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针对不连续采样时的车用发动机磨损故障诊断问题,基于摩擦磨损原理和摩擦副元素之间的相关性,提出了基于比例特征的发动机磨损状态模糊优选诊断方法,建立了发动机磨损变化的比例模型,研究了摩擦副主要磨损元素之间在磨损过程中的比例关系,运用模糊优选理论实现了发动机磨损状态的诊断。通过典型磨损状态的油样光谱分析数据验证了该诊断方法的有效性,解决了车用发动机在不连续采样情况下的磨损故障诊断难题。 相似文献
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《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》2012,50(2-3):221-259
SUMMARY The alteration in wheel and rail profiles due to wear involves considerable vehicle and track-maintenance costs, and influences the loading capacity of the rails, as well as the operation safety and riding comfort of the vehicles. In the past twenty years a vehicle dynamics, contact mechanics and tribology based research work has emerged which is also recently continuous in an international scale, and this research is more and more intensive. Parallel to the growing possibilities of computer based analyses, several algorithms and numerical procedures have been elaborated, as well as measurement based experiments have been carried out to establish the reliable prediction of wear-caused wheel and rail profile alterations and to maximise the mileage performance by selecting the optimum vehicle system parameters for running gears operating on a selected railway line or a whole network under specified -in general inherently stochastic - traffic conditions. This paper takes an attempt to introduce the extended sphere of problems of wheel and rail wear prediction, as well as the latest results reflecting the present state of the art. 相似文献
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Prediction of Wheel/Rail Profile Wear 总被引:3,自引:0,他引:3
Istv n Zobory Professor Istv n Zobory 《Vehicle System Dynamics: International Journal of Vehicle Mechanics and Mobility》1997,28(2):221-259
The alteration in wheel and rail profiles due to wear involves considerable vehicle and track-maintenance costs, and influences the loading capacity of the rails, as well as the operation safety and riding comfort of the vehicles. In the past twenty years a vehicle dynamics, contact mechanics and tribology based research work has emerged which is also recently continuous in an international scale, and this research is more and more intensive. Parallel to the growing possibilities of computer based analyses, several algorithms and numerical procedures have been elaborated, as well as measurement based experiments have been carried out to establish the reliable prediction of wear-caused wheel and rail profile alterations and to maximise the mileage performance by selecting the optimum vehicle system parameters for running gears operating on a selected railway line or a whole network under specified -in general inherently stochastic - traffic conditions. This paper takes an attempt to introduce the extended sphere of problems of wheel and rail wear prediction, as well as the latest results reflecting the present state of the art. 相似文献
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为评估运营阶段风及车流作用下大跨桥梁转轴式伸缩装置的服役状态,融合机构运动理论及磨损机理建立转轴式伸缩装置滑动支承构件的磨损寿命评估方法。以变杆长双滑块双导杆四连杆机构的运动理论为基础,推导了多滑块多导杆的伸缩装置机构运动学数值仿真模型;基于Archard磨损理论提出了伸缩装置滑动支承磨损深度计算模型,以失效概率为指标建立了伸缩装置滑动支承磨损寿命的评估方法;以一单跨悬索桥为算例,对风和车流作用下伸缩装置滑动支承的服役年限及其年更换次数进行定量评估。分析结果表明:建立伸缩装置的机构运动仿真模型,通过与8缝伸缩机构的运动试验数据对比,验证了仿真模型的准确性;利用伽马分布能够较好地模拟伸缩装置滑动支承磨损深度的累加概率特性;随机车流和风作用下,悬索桥伸缩装置滑动支承的服役年限随距滑动侧越近而越小,失效概率反之;一般流和风速10 m·s-1工况下,超82%的滑动支承服役年限小于15年;不同车流密度-风速联合作用对伸缩装置滑动支承的服役年限影响显著,伸缩装置滑动支承的合理更换周期应依据桥址交通量荷载水平及风场条件制定;建立的转轴式伸缩装置滑动支承磨损寿命评估方法可为同类型伸缩装置机构的磨损寿命评估提供参考借鉴。 相似文献
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