极端气候与荷载对沥青路面的综合影响研究

发布时间：2018-10-18 18:03

【摘要】：新疆地区气候与交通条件具有自身的特点,我国现行的设计与施工规范缺少针对该地区气候特点的考虑。传统沥青混合料性能的实验室研究大都是基于单一气候或荷载因素影响下的性能模拟,对环境和荷载综合作用的模拟较为有限。特别是在极端温度条件和重载作用下,沥青路面会加速破坏。为此,需要在新疆地区沥青路面温度场和交通荷载参数基础上,揭示新疆特有的环境条件下的沥青路面破坏规律,从而为新疆地区沥青路面建设提供借鉴。首先需要持续地实测新疆地区的气候、交通荷载基本参数,以获得连续的温度、交通荷载数据。为此,本项目首次开发了路面温度场、交通荷载的连续自动测量技术,选定了阿塔公路代表路段,安装气候、交通荷载参数的连续测定装置,在采集数据的基础上开发软件进一步进行数据处理分析。利用有限元通用程序ANSYS进行温度场数值模拟。并开发了基于压力传感器的轮迹分布监测装置,可以精确测量轮迹分布的空间分布情况,研究轮迹沿道路横向的分布规律。在新疆地区沥青路面温度场和交通荷载参数基础上,进行新疆地区沥青路面力学分析和性能预估,以评价新疆地区沥青路面温度、荷载耦合作用下的沥青路面破坏规律。最后针对具体的极端气候和荷载条件,从混合料设计评价指标、原材料选择、沥青混合料配合比设计、路面结构组合设计以及施工工艺、工程质量控制以及运营管理等多方面采取措施,全面提高沥青路面使用性能。本项目研究极端气候与荷载对沥青路面的影响,有助于了解沥青路面在综合作用下的衰变规律,从而改进设计与施工方法,提高新疆地区沥青路面使用性能与寿命。在当前新疆地区公路建设快速发展的背景下,研究新疆地区气候与交通条件对沥青路面的影响具有重要的现实意义。
[Abstract]:The climate and traffic conditions in Xinjiang have their own characteristics, and the current design and construction codes in China lack consideration for the climatic characteristics of the region. The traditional laboratory research of asphalt mixture performance is mostly based on the performance simulation under the influence of a single climate or load factor, but the simulation of the comprehensive effect of environment and load is relatively limited. Especially under extreme temperature conditions and heavy load, asphalt pavement will accelerate damage. Therefore, based on the temperature field and traffic load parameters of asphalt pavement in Xinjiang region, it is necessary to reveal the law of asphalt pavement damage under the unique environmental conditions in Xinjiang, so as to provide reference for the construction of asphalt pavement in Xinjiang area. In order to obtain the continuous data of temperature and traffic load, it is necessary to continuously measure the climate and basic parameters of traffic load in Xinjiang. Therefore, for the first time, this project has developed the continuous automatic measurement technology of road surface temperature field and traffic load, selected the representative section of Ata Highway, installed the continuous measuring device of climate and traffic load parameters. On the basis of collecting data, the software is developed for further data processing and analysis. The numerical simulation of temperature field is carried out by using finite element general program ANSYS. A wheel track monitoring device based on pressure sensor is developed, which can accurately measure the spatial distribution of the wheel track distribution and study the lateral distribution of the wheel track along the road. On the basis of temperature field and traffic load parameters of asphalt pavement in Xinjiang area, the mechanical analysis and performance prediction of asphalt pavement in Xinjiang area are carried out to evaluate the asphalt pavement failure law under the action of temperature and load coupling in Xinjiang area. Finally, according to the specific extreme climate and load conditions, from the mixture design evaluation index, raw material selection, asphalt mixture ratio design, pavement structure combination design and construction technology, Measures should be taken to improve the performance of asphalt pavement in engineering quality control and operation management. This project studies the influence of extreme weather and load on asphalt pavement, which is helpful to understand the decay law of asphalt pavement under the comprehensive action, so as to improve the design and construction method and improve the performance and service life of asphalt pavement in Xinjiang area. Under the background of the rapid development of highway construction in Xinjiang area, it is of great practical significance to study the influence of climate and traffic conditions on asphalt pavement in Xinjiang.
【学位授予单位】：长安大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：U416.217

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