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公路路面修复工程开展阶段,为解决公路路面老化和破损问题,通过确定了公路路面修复中需要解决的问题和目标,提出高聚物注浆施工方法。分析可知,高聚物注浆技术利用特定的高聚物材料,通过注入路面破损部位进行充填和固化,修复路面的裂缝和坑洼。这种技术具有高强度、耐久性和附着性的特点,能够有效地修复路面破损部位,提高路面的使用寿命和平整度,该技术的应用将为公路维护和管理工作提供可靠的技术支持。 相似文献
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目前,我省的高等级公路及二级公路路面均为沥青混凝土路面,但随着交通量的不断增长,沥青混凝土路面出现早期破坏,如裂缝、剥落、车辙等现象,直接影响了车辆的运行,也增大了养护管理资金的投入。对此,本文从设计方面对沥青混凝土路面进行分析探讨,提出沥青混凝土路面设计应注意的要点。 相似文献
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近几年来,交通载荷日益增加,沥青混凝土路面出现了不同程度的损害。鉴于此,从沥青混凝土路面破损情况和影响路面使用的因素出发,分析了沥青混凝土路面施工质量的控制,着重讨论了摊铺质量的控制方法,可为沥青混凝土路面工程的质量控制有益的参考。 相似文献
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高速公路是重要的交通基础设施,长期受到各种外界因素的影响,如气候变化、车辆荷载和化学腐蚀等,路面容易出现老化、损坏和破损等现象。为保证高速公路正常运营,对路面进行定期养护和修复必不可少。基于此,对CAP还原封层技术进行概述,并结合工程实例,对该技术在高速公路养护中的具体应用进行分析,以期为高速公路养护工作提供参考,有效降低路面维修频次和维修成本。 相似文献
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为了提高公路沥青混凝土路面养护水平,以韶关市乳源县国道工程为例,针对路面预防性养护和功能性修复方法进行总结,分析公路沥青混凝土路面存在的问题、病害类型,同时归纳相关养护对策,结论证实各项养护措施在工程中具有重点应用价值。 相似文献
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路面破损的识别对路面的修复具有十分重要的意义。采用传统的岩心采样法进行沥青混合料测试,其测试结果并不完整,而且会对沥青混合料造成很大损害。地质雷达是一种有效的无损探测手段,它为无损探测公路病害开辟了新途径。针对这一现状,文章对雷达技术在公路病害探测方面的应用进行了详细地分析与论述。 相似文献
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通过揭示沥青混凝土路面早期破损的常见病害类型,对沥青混凝土路面早期破损的原因作了一定程度的分析,并提出几点对策. 相似文献
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文章针对南友高速公路通车运营后出现的高温车辙、水损害和抗滑性能下降等问题,为了使修复后的路面更具安全性和行车舒适性,结合实体工程,选用改进型AC-8即GAC-8沥青混合料进行路面养护,对GAC-8沥青混合料进行了三阶段设计与优化,并对后期实际铺筑效果进行了跟踪检测,为今后湿热地区公路养护工程使用GAC-8沥青混合料提供参考。 相似文献
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微表处在我国公路沥青路面预防性养护方面是一种新工艺、新技术。文章以广东惠河高速公路沥青路面微表处在沥青路面车辙处治方面的施工实践,介绍微表处配合比的试验经验及施工的主要技术要点,供公路沥青路面预防性养护施工参考。 相似文献
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Yue Huang Roger Bird Margaret Bell 《Transportation Research Part D: Transport and Environment》2009,14(3):197-204
Life cycle assessment is being accepted by the road industry to measure such key environmental impacts as the energy consumption and carbon footprint of its materials and laying processes. Previous life cycle studies have indicated that the traffic vehicles account for the majority of fuel consumption and emissions from a road. Contractors and road agencies are looking for road maintenance works that have the least overall environmental impact considering both the roadwork itself and the disrupted traffic. We review life cycle assessment studies and describe the development of a model for pavement construction and maintenance, detailing the methodology and data sources. The model is applied to an asphalt pavement rehabilitation project in the UK, and the micro-simulation program VISSIM is used to model the traffic on that road section. The simulation results are fed into a traffic emissions model and emissions from the roadwork and the traffic are compared. The additional fuel consumption and emissions by the traffic during the roadwork are significant. This indicates that traffic management at road maintenance projects should be included in the life cycle assessment analysis of such work. 相似文献
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The tyre/road noise depends on type and speed of vehicles and on the characteristics of road pavement. Vehicle traffic load and weather conditions lead to significant changes in the characteristics of the materials used to build the wearing course. This applies especially to road pavements with the increased void contents. Clogging of the pores, changes in the characteristics of the binder and the damage to the wearing course influence changes in the acoustic properties of the road pavement over time. The article presents the results of the studies on noise level carried out in 2011 and 2014 by the Statistical Pass-By method (SPB) on porous asphalt concrete (PAC), very thin asphalt concrete (VTAC) and stone mastic asphalt (SMA). The wearing courses with the increased void contents immediately after building constitute a very advantageous solution compared with traditional road pavements (dense asphalt concrete, stone mastic asphalt). However, the unfavourable location of the road with porous wearing course, lack of systematic cleaning of porous layers or inappropriate maintenance methods in winter lead to the loss of the acoustic durability of low-noise pavements within a few years of their exploitation. 相似文献
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多功能养护车是完成沥青路面病害快速处置的现代化作业机具,而将路面材料的就地再生利用作为养护车的标准配置是其作业功能的重要拓展,且是道路养护现代化的主要标志之一。探讨路面材料再生工艺及相关技术参数的优化对于保证和提高再生材料的路用质量、降低加热能源消耗和环境保护具有重要的现实意义。 相似文献
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L.D. Poulikakos A.R. Lees K. Heutschi P. Anderegg 《Transportation Research Part D: Transport and Environment》2009,14(7):507-513
The European Union project Eureka Logchain Footprint is an ongoing project to identify road and rail vehicles by means of their environmental footprint as characterised by dynamic load, noise, ground borne vibrations and gaseous emissions induced by the vehicle. Part of the project involves the installation of road and rail footprint monitoring stations throughout Europe. This paper presents results of the road stations in Switzerland and the UK. Individual vehicle data from weigh-in-motion and noise are compared. The results indicate that a significant number of vehicles surpass the limits set in both countries. It was shown that the UK sites are generating higher noise levels than their Swiss counterparts; in part due to the much coarser aggregate embedded in the running course of the pavement employed in the UK. Such data can be used to create an incentive for vehicle types with a low footprint and a penalty for vehicles with a large footprint. 相似文献
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文章通过对肇庆市国道G321线高要市小湘至封开涌口段路面大修工程实例进行分析,介绍了该路段在旧水泥混凝土路面上加铺沥青混凝土路面的设计方案、施工及质量控制方法,为此类工程提供借鉴。 相似文献
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文章以南宁-梧州二级公路路面大修改造工程为依托,介绍了旧混凝土路面碎石化沥青加铺层的技术特性及作用机理,阐述了Superpave沥青混合料矿料级配设计方法,并根据沥青混合料分形级配理论,探讨了粗集料用量对沥青混合料高温稳定性能的影响。结果表明:增加了26.5 mm1、9 mm的粗集料用量的AC-20沥青混合料具有较好的高温稳定性能。 相似文献