旧水泥混凝土道面沥青罩面改造的病害及处置技术研究

发布时间：2018-12-26 07:38

【摘要】：为促进国民经济的持续发展,基础建设投资规模持续增大,由于水泥混凝土具有众多优点,我国路网工程以及机场道面以水泥混凝土为主,但在使用中暴露出了很多问题,采用沥青罩面加铺方式是解决现有问题的有效手段。本文分析了旧水泥混凝土道面的病害类型及处理方式,分析了沥青加铺结构的反射裂缝形成机理、类型、成因及处理方式,利用ABAQUS软件进行了有限元分析,以张开型裂缝为例,探究了应力强度因子随参数的变化规律。进而针对非荷载裂缝病害形成机理,提出利用增强型沥青材料作为加铺罩面层的预养护方式,针对现有普遍使用封层材料的缺陷,提出采用双层撒布增强型沥青材料用于表面微小裂缝的处置手段,并对比了水性、油性增强型沥青层的特性。油性增强型沥青材料的功能性较强,在满足新罩面行驶能力的同时,使得原有路面结构的整体性提高;而水性增强型沥青材料不仅能节约原料,而且其主要组成材料为水,因此不会污染环境,是较为优良的绿色资源。针对某民用机场跑道开展了沥青加铺层病害的试验分析,将机场作为一工程应用实例进行现场试验,运用先进的雷达探测技术,测试道面区域中不同位置的隐性病害问题,根据不同病害的位置和破损程度,采用不同的加铺方案,对未发现结构性病害区域,采用表面预养护方式的技术建议。
[Abstract]:In order to promote the sustainable development of national economy, the scale of infrastructure investment continues to increase. Because of the numerous advantages of cement concrete, the road network engineering and airport pavement in our country are mainly composed of cement concrete, but many problems have been exposed in use. Using asphalt overlay is an effective way to solve the existing problems. In this paper, the disease types and treatment methods of old cement concrete pavement are analyzed. The formation mechanism, types, causes and treatment methods of reflective cracks in asphalt overlay are analyzed. The finite element analysis is carried out by using ABAQUS software, and the open crack is taken as an example. The variation of stress intensity factor with parameters is investigated. Furthermore, aiming at the formation mechanism of non-load crack disease, this paper puts forward that the reinforced asphalt material is used as the precuring method of overlay, and aiming at the defects of the existing universal sealing material. A double layer reinforced asphalt material is proposed to deal with micro-cracks on the surface, and the characteristics of waterborne and oil-enhanced asphalt layer are compared. The oil-enhanced asphalt material has strong function, which can meet the driving capacity of the new overlay and improve the integrity of the original pavement structure. The waterborne enhanced asphalt can not only save the raw materials, but also its main composition is water, so it will not pollute the environment, so it is a better green resource. Based on the analysis of asphalt overlay diseases on the runway of a civil airport, the airport is used as an engineering example to carry out field tests, and the hidden diseases in different positions in the pavement area are tested by advanced radar detection technology. According to the location of different diseases and the degree of damage, different overlay schemes were adopted, and the technical advice of surface pre-curing was put forward for the areas without structural diseases.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U418.6

【共引文献】