西藏地区公路沥青路面路用性能气候分区及PG分级

发布时间：2018-03-09 13:00

本文选题：道路工程　切入点：PG分级　出处：《公路交通科技》2017年09期 　论文类型：期刊论文

【摘要】：西藏地区地形地貌复杂多样,平均海拔高,年、日温差大,降雨量分布不均匀,恶劣的环境因素严重影响了该地区公路沥青路面的使用性能和寿命。为补充和完善这一地区公路沥青路面路用性能气候分区以及沥青和沥青混合料PG分级的资料,依托西藏地区及其周边设置的26个气象观测站30 a的气象统计资料,运用统计学的原理,按地形、地貌、海拔、季节以及气候特征对其观测站30 a的相关数据进行了计算、划分和归类,通过建立数学模型找出了其中的规律,列出了西藏地区4大典型自然气候区和8个沥青路面路用性能气候分区,方便了不同分区对沥青材料性能的要求和选择。同时,借鉴SHARP研究计划提出的沥青路面性能分级思想,参照国内外一些地区PG分级方法,制定了西藏地区沥青使用的PG分级。这一研究成果对于高海拔、高寒、大温差地区提升公路修建质量,在选择沥青品种、沥青混合料配比设计以及确定沥青路面施工工艺等方面提供参考。
[Abstract]:In Tibet, the topography is complex and diverse, with a high average altitude, a large daily temperature difference, and uneven rainfall distribution. The severe environmental factors have seriously affected the service performance and service life of the asphalt pavement in this area. In order to supplement and improve the climatic partition of the road performance of the asphalt pavement in this area and the classification of asphalt and asphalt mixture PG, Relying on the meteorological statistical data of 26 meteorological observation stations in Tibet and its surrounding areas for 30 years, and using the principle of statistics, the relevant data of the observation stations for 30 years have been calculated according to the characteristics of topography, geomorphology, altitude, season and climate. By establishing mathematical models to find out the rules, the paper lists four typical natural climate regions and eight asphalt pavement performance climate zones in Tibet. It facilitates the requirement and choice of asphalt material performance in different districts. Meanwhile, referring to the idea of asphalt pavement performance classification proposed by SHARP, and referring to the PG classification method in some regions at home and abroad, The PG classification for asphalt use in Tibet has been formulated. The research results have been used to improve the quality of highway construction in areas with high altitude, high cold and large temperature difference, and to select asphalt varieties. The proportion design of asphalt mixture and the determination of asphalt pavement construction technology provide reference.
【作者单位】：交通运输部公路科学研究院;
【基金】：国家科技支撑计划项目(2014BAG05B04) 交通运输部建设科技项目(2013 318 490 010,2014 318 J15 070)
【分类号】：U414

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