长沙绕城高速（西北段）旧沥青路面性能评价及养护方案研究

发布时间：2018-05-08 00:27

本文选题：高速公路沥青路面 + 路面性能评价　；参考：《长沙理工大学》2015年硕士论文

【摘要】：长沙绕城高速公路(西北段)是湖南省第一条沥青路面高速公路,1999年建成通车至今已运营15年。随着交通量和轴载的快速增长,沥青路面破损日渐严重,甚至产生了严重的功能性破坏和局部结构性缺陷,路面使用性能和服务水平日益下降,原有路面结构已不能满足快速增长的交通与车辆荷载要求,亟需养护维修。基于现行公路技术状况评定标准和该领域的现有研究,以长沙绕城高速公路(西北段)旧沥青路面养护维修工程项目为依托,对其路面进行全面调研与性能检测,分别就其路面使用性能的单项指标和综合指标进行评价,并对其主要病害进行归纳分析。该路面结构厚度偏薄,部分路段路面结构刚度和强度偏低,沥青混合料的高温稳定性差。建议对结构强度不足路段进行基层和路基处理,以恢复路面结构承载能力,全线路表面加铺一层罩面层,以恢复抗滑能力、平整度和修复表面损坏病害。在确保技术可行、节约投资的前提下,基于一种养护维修技术措施能处治多种路面病害,对长沙绕城高速(西北段)旧沥青路面养护维修进行了路段划分,提出河东段和河西段综合处治的分区分段养护维修方案。基于国内外现有研究,提出了基于投资效益的高速公路旧沥青路面养护维修方案预估模型的基本原理和具体流程图,建立了基于投资效益的路面养护维修方案预估模型,建立起投资效益与项目投资总额、使用年限及交通量之间的关系,并通过实例介绍了模型的具体计算流程。参考国内外学者研究成果,提出了就地热再生的施工工艺和施工质量控制要点。通过对两种不同交通组织方案的对比分析,建议长沙绕城高速(西北段)养护维修交通组织方案采用半幅双向通行,确保道路的双向通行能力,减少对区域道路的分流压力。同时提出了具体的交通安全防范措施,避免施工期交通事故和交通拥堵的发生。
[Abstract]:Changsha Expressway (Northwest Section) is the first asphalt pavement expressway in Hunan Province. It has been put into operation for 15 years since its completion in 1999. With the rapid growth of traffic volume and axle load, asphalt pavement damage is becoming more and more serious, even serious functional damage and local structural defects. The pavement performance and service level are declining day by day. The original pavement structure can not meet the requirement of traffic and vehicle load, so it is urgent to maintain and maintain. Based on the current highway technical evaluation standard and the existing research in this field, based on the maintenance and repair project of the old asphalt pavement of Changsha Round-the-City Expressway (Northwest Section), a comprehensive investigation and performance test is carried out on its pavement. The single index and comprehensive index of pavement performance are evaluated, and the main diseases are summarized and analyzed. The thickness of the pavement is thin, the stiffness and strength of some sections of pavement are low, and the high temperature stability of asphalt mixture is poor. It is suggested that the base course and subgrade should be treated in order to restore the bearing capacity of pavement structure and to cover the whole road surface in order to restore the skid resistance, smoothness and repair of surface damage. On the premise of ensuring the feasibility of technology and saving investment, the maintenance and repair of old asphalt pavement is divided into sections based on a technical measure of maintenance and repair to treat many kinds of pavement diseases. This paper puts forward a comprehensive maintenance scheme for the section of Hedong section and Hexi section. Based on the existing research at home and abroad, this paper puts forward the basic principle and concrete flow chart of the forecast model of the maintenance and repair scheme of the used asphalt pavement of expressway based on the investment benefit, and establishes the prediction model of the maintenance and repair scheme of the pavement based on the investment benefit. The relationship between the investment benefit and the total investment, service life and traffic volume of the project is established, and the concrete calculation flow of the model is introduced through an example. Referring to the research results of scholars at home and abroad, the construction technology and construction quality control points of geothermal regeneration are put forward. Through the comparison and analysis of two different traffic organization schemes, it is suggested that the traffic organization scheme for maintenance and maintenance of Changsha Roundabout Expressway (Northwest Section) should adopt half two-way traffic to ensure the two-way capacity of the road and reduce the diversion pressure on the regional road. At the same time, the traffic safety prevention measures are put forward to avoid traffic accidents and traffic congestion during construction.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.217;U418.6

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