摘要
多年冻土区沥青路面的吸热量与幅宽密切相关,高速公路宽幅沥青路面的吸热量较二级公路将显著增加,并在路基底部中心位置产生"聚热效应"。而传统的冻土工程措施都是针对低等级公路窄幅路基的需求提出的,不能满足高速公路宽幅路基热量调控的使用要求。文中基于沥青路面宽幅热效应的分析,对传统的单一工程措施进行了综合评价,根据各自的适应条件及作用机理提出了两种复合工程措施,并对13.5m幅宽试验工程的地温观测数据进行了分析,研究表明两种复合措施都具有良好的地温调控效果,对宽幅沥青路面的热效应可起到防治作用,目前已在共玉高速公路建设中进行了推广应用。
The heat absorption of asphalt pavement is closely related with the width in permafrost regions.The heat absorption of wide asphalt pavement is more increased than secondary road,and generates heat accumulating effect in subgrade bottom centre.Traditional measures of engineering are proposed to meet the need of low graded road,but not suitable for the need of high-class highway.Based on the analysis of the thermal effect of asphalt pavement,the traditional single engineering measures are evaluated.Two kinds of compound measures are proposed according to the application and mechanisms.The monitor data of compound measures are analyzed.The results show that two kinds of compound embankment can play a better role in preventing thermal effect of the wide asphalt pavement.The result has been applied in Gonghe-Jiegu Highway.
出处
《公路》
北大核心
2016年第3期12-17,共6页
Highway
基金
国家重点基础研究发展计划(973计划)项目
项目编号2012CB026106
国家科技支撑计划项目
项目编号2014BAG05B03
关键词
道路工程
复合路基
热效应
对策
多年冻土
road engineering
compound measure
thermal effect
countermeasures
permafrost
