季冻区沥青路面早期开裂与道路结构研究
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摘要
通过对河北省北部某高速公路新修沥青路面开裂情况的实地调研,本文对其路面组合结构进行了力学分析与低温收缩特性分析,研究了沥青路面早期开裂原因.利用BISAR 3.0,计算了不同级配碎石过渡层组合设计路面结构的力学指标,利用Hills和Brien的沥青混合料温度应力计算公式,预估了路面温缩应力.结果表明,设置合理厚度的级配碎石过渡层可有效防止与抑制反射裂缝,沥青路面上面层为主抗低温温缩收裂区,调研路段路面早期裂缝为路面低温收缩产生的温缩裂缝.
Based on the field investigation of the crack situation for a highway newly repaired asphalt pavement,to study the causes of early road surface cracking by mechanical analysis and low-temperature shrinkage characteristics for the pavement composite structure.Using BISAR 3.0 to calculate the mechanical parameters of pavement with different graded broken stone transition layer,and using Hills and Brien asphalt mixture temperature stress formula estimated the pavement temperature shrinkage stress.The results show that the reasonable thickness of the graded lithosphere transition layer can effectively prevent and suppress the reflection cracks,the upper layer is the main low temperature shrinkage zone,and the early cracks in the research section are mainly composed of temperature shrinkage cracks.
Based on the field investigation of the crack situation for a highway newly repaired asphalt pavement,to study the causes of early road surface cracking by mechanical analysis and low-temperature shrinkage characteristics for the pavement composite structure.Using BISAR 3.0 to calculate the mechanical parameters of pavement with different graded broken stone transition layer,and using Hills and Brien asphalt mixture temperature stress formula estimated the pavement temperature shrinkage stress.The results show that the reasonable thickness of the graded lithosphere transition layer can effectively prevent and suppress the reflection cracks,the upper layer is the main low temperature shrinkage zone,and the early cracks in the research section are mainly composed of temperature shrinkage cracks.
引文
[1] 吴鹏阁,李土亮,刘杉.季冻区沥青路面横向裂缝宽度变化规律研究[J].内蒙古公路与运输,2017(1):40-42.
[2] 蒋应军,戴经梁,陈忠达.半刚性基层裂缝产生机理分析及防治措施[J].重庆交通大学学报(自然科学版),2002,21(2):54-57.
[3] 吴赣昌,张淦生.沥青路面温缩裂缝的应力强度分析[J].中国公路学报,1996(1):37-44.
[4] 公路沥青路面设计规范(JTG D50-2017)[S].北京:人民交通出版社,2017.
[5] http://baike.so.com/doc/5768415-5981185.html.
[6] 吕文江.沥青路面结构与材料设计一体化研究[D].西安:长安大学,2006.
[7] 李峰,曾蔚,石小培.沥青混合料低温抗裂性能及影响因素评价[J].山东建筑大学学报,2012,27(6):555-559.
[8] 马骉,韦佑坡.高原寒冷地区沥青混合料劈裂强度影响因素[J].公路,2010(8):210-213.
[9] 李彦伟,周卫峰,史增朝.重交通沥青路面材料与结构一体化技术[M].北京:科学出版社,2013.
[10] 秦健,孙立军.国外沥青路面温度预估方法综述[J].中外公路,2005,25(6):19-23.
[2] 蒋应军,戴经梁,陈忠达.半刚性基层裂缝产生机理分析及防治措施[J].重庆交通大学学报(自然科学版),2002,21(2):54-57.
[3] 吴赣昌,张淦生.沥青路面温缩裂缝的应力强度分析[J].中国公路学报,1996(1):37-44.
[4] 公路沥青路面设计规范(JTG D50-2017)[S].北京:人民交通出版社,2017.
[5] http://baike.so.com/doc/5768415-5981185.html.
[6] 吕文江.沥青路面结构与材料设计一体化研究[D].西安:长安大学,2006.
[7] 李峰,曾蔚,石小培.沥青混合料低温抗裂性能及影响因素评价[J].山东建筑大学学报,2012,27(6):555-559.
[8] 马骉,韦佑坡.高原寒冷地区沥青混合料劈裂强度影响因素[J].公路,2010(8):210-213.
[9] 李彦伟,周卫峰,史增朝.重交通沥青路面材料与结构一体化技术[M].北京:科学出版社,2013.
[10] 秦健,孙立军.国外沥青路面温度预估方法综述[J].中外公路,2005,25(6):19-23.