重载交通沥青路面改造方案控制破损模式分析与寿命预估
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摘要
为利于在沥青路面改造过程中优选出适应于重载交通的路面结构方案,以东南沿海某市重载交通沥青路面改造工程为依托,针对不同的路面结构改造方案,利用有限元软件KENPAVE中的KENLAYER模块建立基于弹性层状体系理论的沥青路面结构模型,从疲劳开裂和永久变形出发进行路面结构的破损分析和使用寿命预估。结果表明:(1)重载交通作用下,路面永久变形破损率通常大于疲劳开裂破损率,应通过结构优化重点加以控制;(2)基层对重载交通沥青路面综合性能有显著影响,增加厚度、提高强度,有助于直接提高结构整体抗疲劳开裂和抗永久变形的能力,有利于提高路面结构使用寿命;(3)轴重变化对路面结构的破损程度影响较大,轴重增大,结构预期使用寿命明显减小,但行车速度对其影响较小。经综合比较,在4种改造方案中,结构2即基层采用碾压水泥混凝土的改造方案,其预期使用寿命最长,可作为依托工程路面改造的优选方案。
In order to optimize the pavement structure and make it suitable for heavy-load traffic in the process of asphalt pavement reconstruction,a heavy-load traffic asphalt pavement reconstruction project in a city on the southeast coast was used as the basis,according to different pavement structure reconstruction schemes,KENLAYER module is used in finite element software KENPAVE to establish a calculation model of asphalt pavement structure based on elastic layered system theory,and the damage analysis and service life estimation of pavement structure are carried out from fatigue cracking and permanent deformation.The results illustrate that:(1)Under the action of heavy-load traffic,the permanent deformation damage rate of pavement is usually greater than the fatigue cracking damage rate of pavement,which should be controlled through structural optimization;(2)The base course has a significant influence on the comprehensive performance of heavy-load traffic asphalt pavement,and increasing thickness and strength is helpful to directly improve the overall anti-fatigue cracking and anti-permanent deformation ability of the structure,and to improve the service life of the pavement structure;(3)the change of axle load has a great influence on the damage degree of the pavement structure,and the expected service life of pavement structure decreases with the increase of axle load,but the influence of driving speed is small.Through comprehensive comparison,in the four transformation schemes,the structure 2,that is,the base course is rebuilt by roller compacted cement concrete,has the longest life expectancy,which can be used as the optimum scheme for this study.
In order to optimize the pavement structure and make it suitable for heavy-load traffic in the process of asphalt pavement reconstruction,a heavy-load traffic asphalt pavement reconstruction project in a city on the southeast coast was used as the basis,according to different pavement structure reconstruction schemes,KENLAYER module is used in finite element software KENPAVE to establish a calculation model of asphalt pavement structure based on elastic layered system theory,and the damage analysis and service life estimation of pavement structure are carried out from fatigue cracking and permanent deformation.The results illustrate that:(1)Under the action of heavy-load traffic,the permanent deformation damage rate of pavement is usually greater than the fatigue cracking damage rate of pavement,which should be controlled through structural optimization;(2)The base course has a significant influence on the comprehensive performance of heavy-load traffic asphalt pavement,and increasing thickness and strength is helpful to directly improve the overall anti-fatigue cracking and anti-permanent deformation ability of the structure,and to improve the service life of the pavement structure;(3)the change of axle load has a great influence on the damage degree of the pavement structure,and the expected service life of pavement structure decreases with the increase of axle load,but the influence of driving speed is small.Through comprehensive comparison,in the four transformation schemes,the structure 2,that is,the base course is rebuilt by roller compacted cement concrete,has the longest life expectancy,which can be used as the optimum scheme for this study.
引文
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[9] CHANTACHOT T,KONGKITKUL W,YOUWAI S,et al.Behaviors of geosynthetic-reinforced asphalt pavements investigated by laboratory physical model tests on a pavement structure[J].Transportation Geotechnics,2016,8:103-118.
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[11]刘颖.重载道路路面设计方法研究[D].西安:长安大学,2001.
[12]侯伟.轮载与层间接触状态对沥青路面力学响应的影响[J].重庆交通大学学报(自然科学版),2010,29(5):718-721,731.
[13]李浩,刘锋,许新权,等.无机结合料稳定类基层沥青路面结构计算图示研究[J].武汉理工大学学报(交通科学与工程版),2018,42(2):334-338,343.
[14]李浩,许新权,刘锋.耐久性沥青路面结构疲劳寿命对比分析[J].武汉理工大学学报(交通科学与工程版),2017,41(6):1051-1054.
[15]梁雪娇.轮载作用下高寒地区沥青路面结构力学响应及损伤分析[D].成都:西南交通大学,2017.
[16]国家气象局数据中心.地面气象资料数据集[Z].北京:国家气象局数据中心,2016.
[17]黄仰贤.路面分析与设计[M].北京:人民交通出版社,1998.
[2]袁壮.重载和高温下沥青路面罩面结构的力学分析[D].长沙:长沙理工大学,2008.
[3]李德彬,蒋婷婷,刘立斌.基于结构组合特性的重载沥青路面结构适应性研究[J].筑路机械与施工机械化,2014,31(7):47-50,54.
[4]宋海云.基于Abaqus蠕变本构的重载路面车辙分析[J].结构工程师,2018,34(3):86-91.
[5]徐建平,赵毅,梁乃兴,秦旻.基于疲劳累积损伤的高模量沥青路面使用寿命预估[J].长安大学学报(自然科学版),2018,38(2):26-33.
[6]孙志林,黄晓明.基于非线性疲劳损伤特性的沥青路面形变规律[J].公路交通科技,2012,29(9):13-18.
[7]孙志林,黄晓明.沥青路面线性疲劳损伤特性及应力状态演变规律[J].公路交通科技,2012,29(5):1-6.
[8]冯凌兵,蒋育红,李妍,等.重载交通下的不同沥青路面结构适应性分析[J].安徽冶金科技职业学院学报,2011,21(4):53-56.
[9] CHANTACHOT T,KONGKITKUL W,YOUWAI S,et al.Behaviors of geosynthetic-reinforced asphalt pavements investigated by laboratory physical model tests on a pavement structure[J].Transportation Geotechnics,2016,8:103-118.
[10] WALDENMAIER A J,ABDELRAHMAA M.ATTIA M.Strain response of feclaimed asphalt pavement material blends under extended loading testing[J].Materials of Civil Engineering,2013,25(11):1674-1681.
[11]刘颖.重载道路路面设计方法研究[D].西安:长安大学,2001.
[12]侯伟.轮载与层间接触状态对沥青路面力学响应的影响[J].重庆交通大学学报(自然科学版),2010,29(5):718-721,731.
[13]李浩,刘锋,许新权,等.无机结合料稳定类基层沥青路面结构计算图示研究[J].武汉理工大学学报(交通科学与工程版),2018,42(2):334-338,343.
[14]李浩,许新权,刘锋.耐久性沥青路面结构疲劳寿命对比分析[J].武汉理工大学学报(交通科学与工程版),2017,41(6):1051-1054.
[15]梁雪娇.轮载作用下高寒地区沥青路面结构力学响应及损伤分析[D].成都:西南交通大学,2017.
[16]国家气象局数据中心.地面气象资料数据集[Z].北京:国家气象局数据中心,2016.
[17]黄仰贤.路面分析与设计[M].北京:人民交通出版社,1998.