半刚性基层沥青混凝土路面界面形态研究

发布时间：2018-03-26 16:18

本文选题：界面形态　切入点：三维成像技术　出处：《重庆交通大学》2014年硕士论文

【摘要】：目前，半刚性基层沥青混凝土路面已经成为我国公路建设中最为常用的一种道路形式，与其他的公路形式相对比，它有着多方面的显著优点。然而，随着我国公路建设的蓬勃发展，对半刚性基层沥青混凝土路面各种病害的防治与处置的要求也日益增加，基层与面层界面间的连接方式也被越来越多的重视了起来。本文将三维成像原理与几何分形维数的概念相结合，通过利用半刚性基层顶部二维图像的三维还原效果对界面分形维数进行计算，并综合半刚性基层沥青混凝土路面的路用性能进行界面影响因素的判断。研究表明，在实验室级配范围内，半刚性基层沥青混凝土路面界面的分形维数分别与道路的车辙变形能力和水稳定性呈二维曲线的线性关系；与道路的疲劳强度呈一维直线的线性关系。论文从半刚性基层沥青混凝土路面界面间的连接形式入手，采用三维成像技术理论在MATLAB软件中的应用对半刚性基层的顶部形态进行还原，综合非Herz弹性接触模型理论和古德曼模型理论两种界面间连接方式的评价方法，通过对半刚性基层沥青混凝土路面界面的连接形态进行分析，统计分析了影响基层表面三维形态的因素。利用半刚性基层顶部的分形维数作为界面间形态的代表值，分别计算不同级配条件下半刚性基层顶部分形维数以及半刚性基层沥青混凝土路面的路用性能，将不同的维数与的对应的路用性能指标进行处理，整合对比后得到分形维数与车辙变形、水稳定性和力学强度之间的线形关系。之后提出界面病害的检测方法，在诸多的检测方法中寻求对道路无损害、检测效率高、准确性高、安全性好的检测方法。对道路内部构造的地质雷达检测法和超声波检验法两种无损检测方法分别进行论述，强调其检测的无损性、高效性、准确性等优点，并对其进一步的发展前景进行了展望。最后，，综合利用前面形态分形维数与路用性能关系的比较结果，进一步分析几种不同的改善界面完全连续形态的方式。对目前常用的增加界面间连接层方式的优缺点进行比对，并提出通过混合料配合比的改善以及施工环境、施工技术的改善从而达到界面间完全连续状态的进一步提升，在减小外在环境引起的影响下提高内在的施工技术，从而达到半刚性基层沥青混凝土界面间连接方式的改善的目的。论文得到了交通土建工程材料国家地方联合工程实验室开放基金项目“沥青路面结构层层间界面形态和细观力学行为与路面疲劳损伤关系研究”的资助。
[Abstract]:At present, asphalt concrete pavement with semi-rigid base has become one of the most commonly used road forms in highway construction in our country. Compared with other highway forms, it has many remarkable advantages. With the vigorous development of highway construction in China, the demand for prevention and treatment of various diseases of semi-rigid base asphalt concrete pavement is increasing day by day. More and more attention has been paid to the connection between the interface between the base and the surface. In this paper, the principle of 3D imaging is combined with the concept of geometric fractal dimension. The fractal dimension of the interface is calculated by using the 3D restoration effect of the 2D image of the top of the semi-rigid base, and the influence factors of the interface are judged by synthesizing the pavement performance of the semi-rigid base asphalt concrete pavement. In the range of laboratory grading, the fractal dimension of interface of semi-rigid base asphalt concrete pavement is linear with the rutting deformation ability and water stability of road, and with the fatigue strength of road. This paper starts with the connection form between the interface of semi-rigid base asphalt concrete pavement, adopts the theory of three-dimensional imaging technology in the application of MATLAB software to restore the top shape of semi-rigid base course. Based on the evaluation methods of non-#en0# elastic contact model theory and Goodman model theory, the interface form of semi-rigid base asphalt concrete pavement is analyzed. The factors influencing the 3D shape of the base surface are analyzed statistically. The fractal dimension of the top of the semi-rigid base is used as the representative value of the interfacial morphology. The fractal dimension of semi-rigid base top and the pavement performance of semi-rigid base asphalt concrete pavement are calculated respectively under different gradation conditions, and the corresponding road performance indexes of different dimensions are treated. The linear relationship between fractal dimension and rut deformation, water stability and mechanical strength is obtained. Two kinds of nondestructive testing methods, such as ground penetrating radar detection method and ultrasonic testing method, are discussed respectively, and the advantages of nondestructive testing, high efficiency, accuracy and so on are emphasized. The prospect of further development is forecasted. Finally, the comparison results between the fractal dimension of the former morphology and the performance of the road are synthetically used. This paper further analyzes several different ways to improve the complete continuous shape of the interface, compares the advantages and disadvantages of the commonly used ways to increase the interfacial connection layer, and puts forward that through the improvement of the mixture mix ratio and the construction environment, The improvement of construction technology leads to the further improvement of the complete continuous state of the interface, and the improvement of the internal construction technology while reducing the influence caused by the external environment, In order to achieve the semi-rigid base asphalt concrete interface connection between the purpose of improvement. In this paper, the open fund project of national local joint engineering laboratory of traffic civil engineering materials "study on the relationship between the interfacial morphology and meso-mechanical behavior of asphalt pavement structure and pavement fatigue damage" is obtained.
【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】：U416.21

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