就地热再生沥青加铺层结构设计研究

发布时间：2018-01-14 20:41

本文关键词：就地热再生沥青加铺层结构设计研究　出处：《长沙理工大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着我国交通运输业的快速发展,高速公路沥青路面经过多年的反复行车荷载,路面使用性能逐步下降,并出现多种病害与不同程度的破损。近些年来,我国仍处于高速公路快速发展时期,部分通车时间较长的高速公路沥青路面出现病害现象较多,我国将进入高速公路建、养并重的时代。由于基础建设资源消耗量巨大,与我国的科学发展观相违背,如何在保护环境与节约资源的条件下,对我国高速公路进行修建和养护具有重大意义。合理的选择沥青路面养护措施对改善沥青路面使用性能和延长沥青路面使用年限具有重要的作用,在沥青路面养护中应该充分考虑资源的循环利用,保证资源环境与社会经济效益的持续发展。耒宜高速公路大修项目中成功的运用了就地热再生技术,充分的利用了原路面材料,同时也保证了大修后的路面质量。本次研究通过现场取样、室内试验分析得到在旧老化沥青中掺加5%的再生剂,能够使得老化沥青恢复其流变性;在旧沥青混合料中掺入15%的新混合料所得到的再生沥青沥青混合料的路用性能有较大的提高。耒宜高速沥青路面大修时将原沥青路面再生,再加铺新的沥青层,由于原路面的中、下沥青层作为新路面结构的基层,所以大修后的路面结构偏向于柔性基层,针对柔性基层路面结构组合的特点,探索研究耒宜高速原沥青路面再生后合理的沥青层加铺结构,并通过对各结构层的弯沉实测与交通量预测分析计算,运用Bisar3.0软件进行论证分析,结果均表明耒宜高速原路面采取的就地再生方式与加铺层结构选择方式是可靠的。采用HPDS2011和Bisar3.0软件对湖南地区较为典型的半刚性基层结构的沥青路面进行加铺层结构方案计算分析,推荐了几种较为适宜湖南地区沥青路面维修时的加铺方案,结果可供相关类似工程参考。本文还通过对试验路的跟踪观察,对数据进行整理分析,总结出了就地热再生沥青加铺后的整体强度变化以及施工过程中的一些注意事项,可供其他类似工程借鉴。
[Abstract]:With the rapid development of transportation in China, the performance of asphalt pavement of expressway has declined gradually after many years of repeated driving load, and many kinds of diseases and different degrees of damage have appeared in recent years. China is still in the period of rapid development of expressway, some of the long opening time of highway asphalt pavement disease phenomenon, China will enter the highway construction. Due to the huge consumption of basic construction resources, which is contrary to the scientific development concept of our country, how to protect the environment and save resources. Reasonable selection of asphalt pavement maintenance measures to improve the performance of asphalt pavement and extend the service life of asphalt pavement has an important role. In the maintenance of asphalt pavement, the recycling of resources should be fully considered to ensure the sustainable development of resources, environment and social and economic benefits. The technology of geothermal regeneration has been successfully used in the overhaul project of Lei Yi Expressway. Full use of the original pavement materials, but also to ensure the quality of the road after overhaul. This study through field sampling, laboratory test analysis to add 5% in the old asphalt regeneration agent. It can make the aging asphalt recover its rheology; The pavement performance of recycled asphalt mixture obtained by adding 15% new mixture into old asphalt mixture has been greatly improved. The original asphalt pavement should be regenerated during overhaul of high speed asphalt pavement. Adding new asphalt layer, because of the original pavement, the lower asphalt layer is the base of the new pavement structure, so the overhauled pavement structure is inclined to the flexible base, aiming at the characteristics of the flexible base pavement structure combination. This paper explores and studies the reasonable asphalt overlay structure after regenerating the original asphalt pavement of Leiyi High Speed, and through the actual measurement of deflection of each structure layer and traffic volume prediction analysis and calculation, uses the Bisar3.0 software to carry on the demonstration and analysis. The results show that the method of in-situ regeneration and the selection of overlay structure adopted by the original road surface of Leiyi Expressway are reliable. The HPDS2011 and Bisar3.0 software are used to analyze the typical semi-rigid in Hunan area. The asphalt pavement of the base structure is calculated and analyzed. Several kinds of overlay schemes suitable for asphalt pavement maintenance in Hunan are recommended. The results can be used as reference for similar projects. This paper also analyzes the data by tracking and observing the experimental road. The change of overall strength after overlaying of reclaimed asphalt and some matters needing attention in construction are summarized, which can be used for reference in other similar projects.
【学位授予单位】：长沙理工大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U416.2

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