中外沥青路面结构设计参数对比研究

发布时间：2018-03-18 02:06

本文选题：沥青路面　切入点：设计参数　出处：《东南大学》2015年硕士论文　论文类型：学位论文

【摘要】：由于世界各国经济、技术、地理、环境等条件的差异,使得各国的沥青路面设计规范各具特色,沥青路面结构设计参数的差异也较大。考虑到设计参数在整个沥青路面设计过程中的重要性,以及我国公路对外援建项目日益增多,对中外沥青路面结构设计参数进行对比分析就很有必要。沥青路面设计参数主要分为四类：交通参数、材料参数、土基参数和环境参数,每一类参数都可细分。选取中国、法国、美国的规范作为中外沥青路面设计规范的代表进行对比分析。由于参数众多,对各国设计规范中设计参数的重要性进行分析,得到在三个国家规范中较为重要的参数分别是基层的厚度与模量、面层的模量。对比了中外沥青路面设计参数的获取方法,重点研究了较重要参数的获取方法及其适用性。对交通量参数,在采用轴载换算的中法两国,中国的计算结果约为法国的1.2倍；美国则生成目标年的近似轴载谱,使预测更精确但计算量显著增加。对影响沥青混合料模量的内因和外因进行探究后发现,温度较低时,模量受动、静模量测试方法和设计方法的影响较小,差异小于30%；随着温度升高,两者对模量的影响均显著增加。中法两国均采用承载板法测定土基的静态模量,美国则采用重复加载三轴试验测定其动态模量。动态模量约为静态模量的2-2.5倍且取值更加合理。中法两国基于气候数据对全国进行了分区,美国通过建立气象站对气候数据进行更准确的监测。环境参数对材料模量和土基模量都有较大影响,需保证其精确性。以莫桑比克马普托绕城高速V线作为案例,分别选取三国参数进行了沥青路面设计、优化和路面结构的评价。随着路面结构层材料模量的提升,路面厚度可以大幅削减,适用性将得到提高。在进行沥青路面设计时,应根据地理、资源、经济等因素合理调整设计参数。本文的研究确定了中外沥青路面设计中较重要的设计参数及其获取方法,以期为沥青路面设计方法的改进提供有益参考。
[Abstract]:Due to the differences in economic, technological, geographical and environmental conditions of various countries in the world, the design specifications of asphalt pavement in various countries have their own characteristics. Considering the importance of design parameters in the whole process of asphalt pavement design, and the increasing number of highway construction projects in China, It is necessary to compare and analyze the structural design parameters of asphalt pavement at home and abroad. The design parameters of asphalt pavement can be divided into four categories: traffic parameter, material parameter, soil foundation parameter and environment parameter, each kind of parameter can be subdivided. The codes of France and the United States, as representatives of the asphalt pavement design codes at home and abroad, are compared and analyzed. Because of the large number of parameters, the importance of the design parameters in the design codes of various countries is analyzed. The more important parameters in the three national codes are the thickness and modulus of the base course, the modulus of the surface layer, and the comparison of the methods of obtaining the design parameters of the asphalt pavement between China and foreign countries. The method of obtaining more important parameters and their applicability are emphatically studied. For the traffic volume parameters, the calculated results of China and France are about 1.2 times that of France, and the approximate axial load spectrum of the target year is generated in the United States. When the internal and external factors affecting the modulus of asphalt mixture are investigated, it is found that when the temperature is low, the modulus is moved, and the static modulus testing method and the design method have less influence on it. The difference is less than 30. With the increase of temperature, the influence of both on the modulus is obviously increased. The static modulus of soil foundation is measured by the method of bearing plate in both China and France. In the United States, the dynamic modulus is determined by repeated loading triaxial test. The dynamic modulus is about 2-2.5 times of the static modulus and the value is more reasonable. China and France have divided the whole country based on climate data. The United States conducts more accurate monitoring of climate data through the establishment of weather stations. Environmental parameters have a greater impact on both the modulus of materials and the modulus of soil foundations, and their accuracy needs to be ensured. Take the case of the Maputo High Speed V Line in Mozambique, The asphalt pavement design, optimization and pavement structure evaluation are carried out by selecting three parameters respectively. With the increase of the material modulus of pavement structure layer, the pavement thickness can be greatly reduced, and the applicability will be improved. The design parameters should be adjusted reasonably according to the factors of geography, resources and economy. In this paper, the more important design parameters and their acquisition methods in the design of asphalt pavement at home and abroad are determined in order to provide a useful reference for the improvement of the design method of asphalt pavement.
【学位授予单位】：东南大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.217

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