摘要
结合国内外预裂缝技术特点,提出一种不加入早强性材料的基层修复技术,只是在通车早期限重来实施,此时的基层被碾压成空间的网状微细裂缝,和较宽的横向裂缝相比,沥青路面产生反射裂缝的概率降低,沥青路面力学状态也有所改善;采用有限元方法,模拟理想的裂缝类型,对两种裂缝形式下的的沥青路面的力学响应进行对比分析,并计算出采用微裂技术的沥青路面的面层寿命。研究发现:微裂技术在一定程度上降低了沥青面层的寿命,但解决了常规修复技术中的容易产生反射裂缝的问题,并实现了快速修复的技术要求,因此微裂技术在基层快速修复中具有一定的可行性。
Combining with the technical characteristics of the pre-cracking techniques at home and abroad, a base quick repair technology without addition of early strength material is proposed. It only limits heavy traffic in early period of road service. In this period, the base is rolled into the space mesh micro-cracks, the probability of reflective cracking of asphalt pavement decreases and the mechanical state of asphalt pavement status is also improved compared with the wider transverse cracks. The ideal type of crack is simulated by finite element method, the mechanical responses of asphalt pavement in 2 types of crack are analyzed, and the life of asphalt pavement surface layer using micro-cracking technology is calculated. It is found that micro-cracking technique reduced the life of asphalt surface to some extent, but it solves the problem of reflective cracks easily occurred in conventional repair techniques, and can achieve the technical requirement of rapid restoration, so micro-cracking technique has certain feasibility in base quick repair.
出处
《公路交通科技》
CAS
CSCD
北大核心
2016年第8期51-57,共7页
Journal of Highway and Transportation Research and Development
关键词
道路工程
微裂技术
有限元
基层快速修复
疲劳寿命
road engineering
micro-cracking technique
finite element
base quick repair
fatigue life
