提高青海省沥青路面耐久性的技术措施研究

发布时间：2018-05-14 20:10

本文选题：青海省 + 交通量分级　；参考：《长安大学》2015年硕士论文

【摘要】：青海省幅员辽阔,各地区的自然条件差异悬殊,技术水平、材料来源和经济条件也不尽相同,规范难以囊括众多地区的差异,并遵循相对保守的原则,因而仅根据规范规定的原则和方法进行结构组合设计、参数取值,难免在某些情况下设计理论与实践脱节,致使路面结构设计存在缺陷,而沥青路面典型结构设计能很好的结合当地的实际情况,提出合理的路面结构、材料及厚度,提高沥青路面的使用寿命。论文通过对青海省公路沥青路面使用状况进行调查,找出了病害的种类及所占比例,并且分析造了成沥青路面损坏(尤其是早期损坏)的根本原因,提出了防治措施;在7个连续式观测站2002~2013年交通量数据的基础上,以累计当量轴次为主要指标,对比参照规范关于交通量等级的划分标准,对青海省交通量等级进行划分;通过对青海省以往大量设计文件以及研究报告等收集整理,对青海省路基回弹模量的取值范围进行合理界定,同时借助于路基模量变化引起的基层厚度变化的敏感性分析,完成了青海省路基强度等级的划分。论文通过总结青海省公路沥青路面不同路面结构在不同地区所呈现出来的病害特征,分别从抗水损坏性能、低温抗裂性能以及高温稳定性能三个角度,提出青海省常用沥青混合料的路用性能指标,同时对青海省常用沥青混合料基层、底基层材料进行抗压回弹模量试验和劈裂强度试验,进而推荐出青海省沥青路面典型结构的材料设计参数。针对青海省三个自然区域(祁连山地、柴达木盆地、青南高原)地域特征及气候特征,在路面病害原因、交通量分级、路基强度等级划分以及沥青路面结构实用性等相关研究的基础上,实现了青海省沥青路面结构优化,推荐出了适合青海省各地区和不同交通量等级的沥青路面典型结构,供公路设计部门进行青海省各地区公路设计时参考选用。
[Abstract]:Qinghai Province has a vast territory, and the natural conditions of each region vary greatly. The technical level, material sources and economic conditions are also different. The norms are difficult to cover the differences in many regions and follow the relatively conservative principle. Therefore, only according to the principles and methods stipulated in the code, the structural combination design is carried out, and the parameters are chosen, which is inevitable in some cases that the design theory and practice are disjointed, which leads to the defects in the pavement structure design. And the typical structure design of asphalt pavement can combine the actual situation of local well, put forward the reasonable pavement structure, material and thickness, improve the service life of asphalt pavement. Based on the investigation of the use of asphalt pavement in Qinghai Province, this paper finds out the types and proportion of the diseases, and analyzes the fundamental causes of the asphalt pavement damage (especially the early damage), and puts forward the preventive measures. Based on the traffic volume data of seven continuous observation stations from 2002 to 2013, taking the accumulative equivalent axis as the main index, the traffic volume grade of Qinghai Province was classified according to the criterion of traffic volume classification. Through collecting and sorting out a large number of design documents and research reports in Qinghai Province, the range of the elastic modulus of roadbed in Qinghai Province is reasonably defined, and the sensitivity analysis of the change of subgrade thickness caused by the variation of subgrade modulus is also made. The grade of roadbed strength in Qinghai province has been divided. Through summarizing the disease characteristics of different pavement structures in different areas of Qinghai Province, the paper analyzes the water damage resistance, low temperature crack resistance and high temperature stability respectively from three aspects: water damage resistance, low temperature crack resistance and high temperature stability. The road performance index of common asphalt mixture in Qinghai Province is put forward. At the same time, the compressive resilience modulus test and splitting strength test are carried out on the base course and bottom base material of asphalt mixture in Qinghai Province. Furthermore, the material design parameters of typical structure of asphalt pavement in Qinghai Province are recommended. In view of the regional and climatic characteristics of three natural regions (Qilian Mountains, Qaidam Basin, Qingnan Plateau) in Qinghai Province, the causes of road surface diseases, traffic volume classification, Based on the research of subgrade strength classification and asphalt pavement structure practicability, this paper realizes the optimization of asphalt pavement structure in Qinghai Province, and recommends the typical asphalt pavement structure suitable for various areas and different traffic volume levels in Qinghai Province. For highway design departments in Qinghai Province highway design for reference selection.
【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】：U416.217

【共引文献】