面向山区国省干线公路沥青路面的就地热再生技术研究

发布时间：2018-08-18 17:04

【摘要】：山区国省干线公路作为我国重要的基础设施，在公路路网中发挥着不可替代的作用。与此同时，山区公路沥青路面的使用性能却日渐下降，因此，它的养护问题也越来越受到公路建设者的普遍关注。当前，我国山区公路养护的现状是规模越来越大，而资金却极度缺乏。在这种情况下，就需要减少沥青路面早期病害，并尽可能延缓这些早期病害的进一步发展，从而达到延长路面的使用时限以降低养护费用的目的。因此，山区公路沥青路面在选择预防性养护方式时，应跟据该类路面所处的气候环境、交通量、设计参数等因素，选择具有针对性的预防性养护措施。就地热再生技术作为一种成熟的预养护技术，符合山区公路可持续发展的需要。鉴于此，本文提出了针对山区国省干线公路的就地热再生预养护研究。本文首先探讨了山区国省干线公路早期典型病害及发展机理，然后在就地热再生已有的研究成果基础上，针对山区公路独特的地形条件、气候、环境等因素，对适合山区国省干线公路应用就地热再生技术的条件、施工工艺流程进行了总结，进而研究了山区公路沥青路面就地热再生技术的施工工艺流程及要点，并指出，再生沥青混合料配合比设计、现场再生施工质量是影响再生沥青路面使用性能的主要因素。同时，根据山区公路就地热再生技术施工工艺，提出了影响施工质量的主要因素，如全过程温度、铣刨厚度等，并制定了相应的控制措施。最后，本文通过建立灰色关联分析路面综合性能评价模型，对再生路面的综合性能进行评价。研究结果表明，，沥青路面就地热再生技术应用于山区公路时，具有较好的技术性能及经济效果。并且在施工过程中，机组占用的工作面积小，施工作业时间短，对道路的交通影响小。可见，该技术对山区社会发展和经济建设具有积极影响。
[Abstract]:As an important infrastructure in our country, the trunk highway in mountainous areas plays an irreplaceable role in the highway network. Meanwhile, the performance of asphalt pavement in mountainous areas is declining day by day. Therefore, the maintenance of trunk highway has been paid more and more attention by highway builders. In this case, it is necessary to reduce the early diseases of asphalt pavement and delay the further development of these early diseases as far as possible so as to prolong the service time of pavement and reduce the maintenance cost. In view of the climatic environment, traffic volume, design parameters and other factors, the preventive maintenance measures are selected. As a mature pre-maintenance technology, the in-situ thermal regeneration technology meets the needs of sustainable development of mountain highways.
In this paper, the early typical diseases and development mechanism of trunk highway in mountainous areas are discussed firstly, and then, on the basis of the existing research results of geothermal regeneration, the conditions and construction process of applying geothermal regeneration technology to trunk highway in mountainous areas are summarized according to the unique topographic conditions, climate, environment and other factors. The construction process and key points of in-situ thermal recycling technology for mountain highway asphalt pavement are studied. It is pointed out that the mix design of recycled asphalt mixture and the quality of in-situ recycling construction are the main factors affecting the performance of recycled asphalt pavement. The main factors of construction quality, such as the whole process temperature, milling thickness, and so on, have formulated the corresponding control measures. Finally, this paper establishes the comprehensive performance evaluation model of grey correlation analysis to evaluate the comprehensive performance of recycled pavement.
The results show that the in-situ thermal recycling technology of asphalt pavement has better technical performance and economic effect when applied to mountain highway, and in the construction process, the working area occupied by the unit is small, the construction time is short, and the traffic impact on the road is small.
【学位授予单位】：重庆交通大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.217

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