半刚性基层长寿命沥青路面的实践检验

发布时间：2018-04-20 09:08

本文选题：长寿命路面 + 半刚性基层　；参考：《公路》2016年12期

【摘要】：为验证并检验长寿命路面的设计与施工技术,2012年分别在内蒙古自治区和广东省修建了两条半刚性基层长寿命试验路。施工期间进行了大量的试验检测,并在随后几年间对试验路的路用性能进行了跟踪观测。调查发现,尽管两条试验路采用了几乎相同的路面结构、承受着类似的交通荷载,但路用性能却表现出巨大的差异:内蒙古试验路的路面横向裂缝率达到47.9m/1 000m2,而广东试验路仅为0.75m/1 000m2。通过详细的数据分析认为:(1)相较于传统的半刚性路面,半刚性基层长寿命沥青路面需要更加重视提高路面承载能力、优化混合料路用性能、使用粗集料断级配的级配型式、降低施工变异性、增强层间黏结、延缓或减少路面反射裂缝;(2)内蒙古试验路的路面横向裂缝很可能由路基的冻裂引起,自下而上发展至路表,是重冰冻地区的一种典型裂缝型式。
[Abstract]:In order to verify and test the design and construction technology of long-life pavement, two semi-rigid base long-life test roads were built in Inner Mongolia Autonomous region and Guangdong Province in 2012. A large number of tests were carried out during the construction period, and the road performance of the test road was followed up and observed in the following years. The survey found that although the two test roads used almost the same pavement structure, bearing similar traffic loads, However, the road performance shows great difference: the pavement transverse crack rate of Inner Mongolia Experimental Road is up to 47.9m/1 000m2, while that of Guangdong Test Road is only 0.75m/1 000m2. Through the detailed data analysis, it is concluded that compared with the traditional semi-rigid pavement, the long-life asphalt pavement with semi-rigid base needs to pay more attention to improving the bearing capacity of the pavement, optimizing the pavement performance of the mixture, and using the gradation type of coarse aggregate broken gradation. Reducing Construction variability, strengthening interlayer bonding, delaying or reducing pavement reflection cracks / 2) the transverse cracks on the road surface of Inner Mongolia Experimental Road are likely to be caused by the frost cracking of the roadbed and developed from the bottom up to the road surface. It is a typical crack type in heavy freezing area.
【作者单位】：中国路桥工程有限责任公司;交通运输部公路科学研究院;
【基金】：西部交通建设科技项目;项目编号2009318223080
【分类号】：U416.217

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