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为优化超薄磨耗层养护技术在高速公路沥青路面上的应用效果,结合实际案例,探讨路面破损病害原因,基于超薄磨耗层的技术要求,提出沥青路面超薄磨耗层养护技术方案。结果表明,在高速公路沥青路面应用超薄磨耗层养护技术能够改善高速公路路面平整度和车辆行驶舒适度,同时能够提升经济效益。 相似文献
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针对温拌超薄磨耗层施工工艺在高速公路养护施工中的应用现状,进行综合分析,并结合具体的高速公路工程实例,简要介绍了温拌超薄磨耗层施工技术特点,如提升高速公路路面排水性能、提高公路路面的耐磨损性能等等,提出高速公路养护中温拌超薄磨耗层施工工艺应用要点,希望能够为类似工程提供有效参考. 相似文献
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超薄磨耗层是一种具有较大构造深度,抗滑性能好的磨耗层,适用于路面较平整、辙槽深度小10mm,无结构性破坏的公路。为了提高表面层服务功能的养护维修措施,也适用于新建公路的磨耗层。从原材料、设计、施工、检测等多方面介绍了NovaChip改性超薄磨耗层在杭金衢高速公路金华段的应用成果。 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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本文对比三种代表性沥青混合料,包括AC-13C型、半开级配Novachip Type C型及OGFC-13沥青混合料。选取了马歇尔稳定度、浸水马歇尔、冻融劈裂试验等试验比较这三种混合料的各种路用性能。对Novachip○RType C超薄磨耗层混合料的使用性能展开系统研究。旨在对于超薄磨耗层的使用推广提供进一步的理论依据。 相似文献
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Alan C. McKinnon 《运输评论》2013,33(1):37-64
Abstract Between 1997 and 2004, gross domestic product increased in real terms in the UK by one‐fifth, while the volume of road freight movement remained stable. This suggests that the long‐awaited decoupling of economic and freight transport growth has begun, possibly leading to a new era of sustainable logistics. This paper reviews previous research on the decoupling issue and recent trends in gross domestic product/freight tonne‐km elasticities in Europe and the USA. It then examines 12 possible causes of the observed decoupling in the UK using published statistics from a wide range of British and European sources. This analysis indicates that around two‐thirds of the decoupling is due to three factors whose impact can be quantified: the increased penetration of the British road haulage market by foreign operators, a decline in road transport’s share of the freight market, and real increases in road freight rates. Several other factors, most notably the relative growth of the service sector, the diminishing rate of centralization, and the off‐shoring of manufacturing, appear to be having a significant effect, though this finding cannot be measured on the basis of available statistics. The paper concludes that, while the decoupling is in the right direction from a public policy standpoint, the net environmental benefits are likely to be quite modest. 相似文献
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J. Enrique Fernández L. Joaquín de Cea Ch G. Germán Valverde 《Transportation Research Part A: Policy and Practice》2009,43(5):481-499
The effect of the application of advanced transport information system (ATIS) and road pricing is studied in a transportation system under non-recurrent congestion. A stochastic network deterministic user equilibrium model (SNDUE) with elastic demand is formulated and used to evaluate the welfare and private impacts of different market penetrations of ATIS, together with road pricing for a simple network. Both marginal first-best road pricing and a second-best fixed road pricing are considered. The incentives of private users to use ATIS are analyzed and the characteristics of optimum tolls as a function of ATIS market penetration are shown. We conclude that ATIS is an efficient and necessary tool to reduce the effects of non-recurrent incidents in a transportation network, especially when non-recurrent congestion causes a significant deterioration of operational conditions of the network. If the impact of non-recurrent incidents on free flow costs is small or is reduced only to congestion effects, the use of road pricing would be more efficient. Social benefits obtained when jointly implementing ATIS and road pricing are practically the same whether first-best or second-best road pricing is used. Considering the private costs perceived by the network users, and the benefits experienced by equipped users, the maximum level of market penetration achieved could be limited because private benefits disappear after certain market penetration is obtained. 相似文献
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近年来,沥青混合料温拌技术因具有节能减排、绿色环保等优势而受到国内外公路界的广泛关注。泡沫温拌技术是近几年兴起的一项新的温拌技术,无需添加任何化学添加剂,成本优势明显,施工温度降低幅度和节能减排效果显著,是真正意义上的“绿色、低碳”筑路技术。本文结合该项技术的国内研究现状,从该技术的发展历程、研究成果以及技术应用评价,对泡沫温拌沥青路面技术在江苏省高速公路养护中的应用进行总体评价。 相似文献
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文章根据我国道路运输市场的形成和发展实际,从运输市场竞争的正负面影响和利弊角度思考,对运政管理应对越来越激烈的运输市场竞争作初步的探讨,提出相关应对策略和措施。这对新形势下激发大家自觉维护正常的道路运输市场秩序、共同遏制过度竞争造成的负面影响有着重要的意义和促进作用。 相似文献
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道路运输安全是一项需综合治理的系统工程,不仅需要社会各方相互配合,更需要相应的法律手段进行规制。文章阐述了《道路交通安全法》在规范运输市场安全秩序中的作用,分析了《道路交通安全法》实施后我国公路运输市场现状及存在的问题,提出了推进道路交通运输市场规范化发展的对策建议。 相似文献