沥青路面永久性变形发展机理研究
发布时间：2019-07-03 10:26
【摘要】：随着我国经济飞速发展，交通量和车辆轴载迅速增加，路面状况越来越复杂。在高等级路面中，尤其是沥青路面往往没达到设计寿命就出现了永久性变形。研究沥青路面永久性变形的意义在于，不仅是沥青混合料配合比设计的重要依据，还可以了解使用期内的沥青路面的损坏发展情况，为日后的路面维修和养护提供参考。这样可以有效的控制沥青路面的车辙深度，提高路面服务性能，为便捷、通畅、安全行车提供保证，促进经济的飞速发展。并且能够延长沥青路面的使用寿命，节省养护维修费用。 本文以渝黔高速公路的永久性变形病害数据为依托，结合BISAR软件对沥青路面中剪应力的分布状态作了较深入系统的研究。通过渝黔高速病害资料和路面受力分析发现，，纵坡路段的永久性变形程度比水平路面要严重很多。得出了永久性变形与行车速度、道路坡度以及车辆载重情况的关系。为研究沥青混合料的材料特性，从永久性变形的影响因素和不同类型车辙的特征入手。得出了沥青路面永久性变形发展机理的四个方面：结构破坏、继续压密、剪切流动、磨耗。利用BISAR3.0软件对沥青路面在不同水平力系数和不同层间状态条件下的剪应力进行了分析计算。得到了水平力系数变化对沥青路面内剪应力的干涉范围；车辆荷载作用位置对剪应力的影响；层间状态不同时剪应力的分布规律。这些都对防治永久性变形提供了依据。通过病害数据和数值分析，基本得出了沥青路面永久性变形的发展机理。与此同时，对沥青路面永久性变形防治措施也作了探讨。通过材料、施工、管理多方面，对沥青道路的施工起到一定的指导作用。
[Abstract]:With the rapid development of economy in our country, the traffic volume and vehicle axle load increase rapidly, and the pavement condition is becoming more and more complex. In high grade pavement, especially asphalt pavement, permanent deformation occurs when it does not reach the design life. The significance of studying permanent deformation of asphalt pavement is not only an important basis for mix design of asphalt mixture, but also an understanding of the damage and development of asphalt pavement during its service life, so as to provide reference for pavement maintenance and maintenance in the future. This can effectively control the rut depth of asphalt pavement, improve pavement service performance, provide guarantee for convenient, smooth and safe driving, and promote the rapid development of economy. And can prolong the service life of asphalt pavement, save maintenance costs. In this paper, based on the permanent deformation disease data of Chongqing-Guizhou Expressway, the distribution of shear stress in asphalt pavement is studied deeply and systematically with BISAR software. Through the data of Chongqing-Guizhou highway disease and the analysis of pavement force, it is found that the permanent deformation degree of longitudinal slope section is much more serious than that of horizontal pavement. The relationship between permanent deformation and driving speed, road slope and vehicle load is obtained. In order to study the material characteristics of asphalt mixture, the influencing factors of permanent deformation and the characteristics of different types of ruts are studied. Four aspects of permanent deformation development mechanism of asphalt pavement are obtained: structural failure, continuous compaction, shear flow and wear. The shear stress of asphalt pavement under different horizontal force coefficients and different interlaminar conditions is analyzed and calculated by using BISAR3.0 software. The interference range of horizontal force coefficient on shear stress in asphalt pavement, the influence of vehicle load position on shear stress and the distribution of shear stress in different interlaminar states are obtained. All these provide a basis for the prevention and control of permanent deformation. Through disease data and numerical analysis, the development mechanism of permanent deformation of asphalt pavement is obtained. At the same time, the prevention and control measures of permanent deformation of asphalt pavement are also discussed. Through material, construction and management, it plays a certain guiding role in the construction of asphalt road.
【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
本文编号：2509313
[Abstract]:With the rapid development of economy in our country, the traffic volume and vehicle axle load increase rapidly, and the pavement condition is becoming more and more complex. In high grade pavement, especially asphalt pavement, permanent deformation occurs when it does not reach the design life. The significance of studying permanent deformation of asphalt pavement is not only an important basis for mix design of asphalt mixture, but also an understanding of the damage and development of asphalt pavement during its service life, so as to provide reference for pavement maintenance and maintenance in the future. This can effectively control the rut depth of asphalt pavement, improve pavement service performance, provide guarantee for convenient, smooth and safe driving, and promote the rapid development of economy. And can prolong the service life of asphalt pavement, save maintenance costs. In this paper, based on the permanent deformation disease data of Chongqing-Guizhou Expressway, the distribution of shear stress in asphalt pavement is studied deeply and systematically with BISAR software. Through the data of Chongqing-Guizhou highway disease and the analysis of pavement force, it is found that the permanent deformation degree of longitudinal slope section is much more serious than that of horizontal pavement. The relationship between permanent deformation and driving speed, road slope and vehicle load is obtained. In order to study the material characteristics of asphalt mixture, the influencing factors of permanent deformation and the characteristics of different types of ruts are studied. Four aspects of permanent deformation development mechanism of asphalt pavement are obtained: structural failure, continuous compaction, shear flow and wear. The shear stress of asphalt pavement under different horizontal force coefficients and different interlaminar conditions is analyzed and calculated by using BISAR3.0 software. The interference range of horizontal force coefficient on shear stress in asphalt pavement, the influence of vehicle load position on shear stress and the distribution of shear stress in different interlaminar states are obtained. All these provide a basis for the prevention and control of permanent deformation. Through disease data and numerical analysis, the development mechanism of permanent deformation of asphalt pavement is obtained. At the same time, the prevention and control measures of permanent deformation of asphalt pavement are also discussed. Through material, construction and management, it plays a certain guiding role in the construction of asphalt road.
【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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