半刚性基层沥青路面车辙破坏机理与高温车辙变形特性分析
发布时间：2019-06-10 03:39
【摘要】：我国公路主要路面结构是半刚性基层沥青路面。随着快速发展的国民经济和日益增长的交通量,大型车辆轴载日益重型化,超载现象越发严重。大量的沥青混凝土路面面临着超出设计轴重的风险,使得沥青路面受到严峻考验,不能满足交通量的需要。许多道路建成不久,就发生了路面开裂、高温车辙变形、水损等早期灾害。因此,作为地理位置重要和交通繁重的天津地区高速,如何提高沥青路面的使用寿命,减少车辙的产生,已经成为众多道路工作者所面临的重大课题。车辙是各地常见的一种路面病害,它的产生有很多原因,不仅与路面结构、集料的性质、沥青混合料的强度和抗变形能力有关,还与道路交通荷载、路面温度、剪应力等因素密切相关。本论文以津京冀地区典型路面结构为对象,通过项目现场调查和评价,主要研究了路面的检测评定、车辙损坏防治措施、沥青路面计算参数及剪应力分布规律,并对典型路面结构建立了有限元模型。利用Abaqus有限元分析软件分析计算了在连续变温下的温度场,以及分别在标准轴载和重载作用下的剪应力和抗剪强度,验证了路面设计方案对路面的抗车辙特性的影响。最后,通过对路面设计方案和检测结果的分析,结合天津地区沥青路面的现状,得出了一些结论,认为工程的设计方案合理、有效。为今后的半刚性基层沥青路面的研究和设计施工提供参考。
[Abstract]:The main pavement structure of highway in China is semi-rigid base asphalt pavement. With the rapid development of national economy and increasing traffic volume, the axle load of large vehicles is becoming more and more heavy, and the phenomenon of overload is becoming more and more serious. A large number of asphalt concrete pavement is facing the risk of exceeding the design shaft load, which makes the asphalt pavement face a severe test and can not meet the needs of traffic volume. Soon after the completion of many roads, early disasters such as pavement cracking, high temperature rut deformation, water loss and so on have occurred. Therefore, as an important geographical location and heavy traffic in Tianjin, how to improve the service life of asphalt pavement and reduce the occurrence of ruts has become an important issue faced by many road workers. Rut is a common pavement disease in various places, which has many reasons, not only related to pavement structure, aggregate properties, asphalt mixture strength and deformation resistance, but also road traffic load, pavement temperature. Shear stress and other factors are closely related. This paper takes the typical pavement structure in Tianjin-Beijing-Hebei area as the object, through the project site investigation and evaluation, mainly studies the pavement detection and evaluation, rut damage prevention and control measures, asphalt pavement calculation parameters and shear stress distribution law. The finite element model of typical pavement structure is established. The temperature field under continuous temperature variation, shear stress and shear strength under standard axial load and heavy load are analyzed and calculated by Abaqus finite element analysis software, and the influence of pavement design scheme on rut resistance of pavement is verified. Finally, through the analysis of pavement design scheme and test results, combined with the present situation of asphalt pavement in Tianjin area, some conclusions are drawn, and it is considered that the design scheme of the project is reasonable and effective. It provides a reference for the research, design and construction of semi-rigid base asphalt pavement in the future.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.217
，
本文编号：2496137
[Abstract]:The main pavement structure of highway in China is semi-rigid base asphalt pavement. With the rapid development of national economy and increasing traffic volume, the axle load of large vehicles is becoming more and more heavy, and the phenomenon of overload is becoming more and more serious. A large number of asphalt concrete pavement is facing the risk of exceeding the design shaft load, which makes the asphalt pavement face a severe test and can not meet the needs of traffic volume. Soon after the completion of many roads, early disasters such as pavement cracking, high temperature rut deformation, water loss and so on have occurred. Therefore, as an important geographical location and heavy traffic in Tianjin, how to improve the service life of asphalt pavement and reduce the occurrence of ruts has become an important issue faced by many road workers. Rut is a common pavement disease in various places, which has many reasons, not only related to pavement structure, aggregate properties, asphalt mixture strength and deformation resistance, but also road traffic load, pavement temperature. Shear stress and other factors are closely related. This paper takes the typical pavement structure in Tianjin-Beijing-Hebei area as the object, through the project site investigation and evaluation, mainly studies the pavement detection and evaluation, rut damage prevention and control measures, asphalt pavement calculation parameters and shear stress distribution law. The finite element model of typical pavement structure is established. The temperature field under continuous temperature variation, shear stress and shear strength under standard axial load and heavy load are analyzed and calculated by Abaqus finite element analysis software, and the influence of pavement design scheme on rut resistance of pavement is verified. Finally, through the analysis of pavement design scheme and test results, combined with the present situation of asphalt pavement in Tianjin area, some conclusions are drawn, and it is considered that the design scheme of the project is reasonable and effective. It provides a reference for the research, design and construction of semi-rigid base asphalt pavement in the future.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：U416.217
，
本文编号：2496137
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