基于响应面法的石质路基沥青路面结构优化研究
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摘要
为了提高石质路基沥青路面结构的使用性能,应用响应面法对路面结构为沥青面层、级配碎石基层和石质路基的路面结构进行优化分析;按照公路沥青路面设计新规范的新设计指标来分析各个路面结构层厚度对新指标的影响,以各面层的厚度和基层的厚度作为约束条件,以沥青混合料疲劳开裂次数、沥青混合料层永久变形量和路基顶面竖向压应变作为响应因素建立响应面优化模型。研究表明:面层的厚度对永久变形量、疲劳开裂次数和路基顶面竖向压应变有显著的影响,而级配碎石基层厚度对三大指标影响较小。
In order to improve the performance of asphalt pavement structure of stone subgrade,the response surface method was applied to optimize the pavement structure of asphalt surface,graded macadam base and stone subgrade. According to the new design index of the new specification for highway asphalt pavement design,the influence of the thickness of each pavement structure layer on the new index was analyzed. Taking the thickness of each surface layer and the thickness of base layer as constraints,the response surface optimization model was established by taking the number of fatigue cracking of asphalt mixture,the permanent deformation of asphalt mixture layer and the vertical compressive strain of roadbed top as response factors. The results show that the thickness of the surface layer has a significant effect on the permanent deformation,the number of fatigue cracks and the vertical compressive strain of roadbed top; while the thickness of graded macadam base layer has a little effect on the above three indexes.
In order to improve the performance of asphalt pavement structure of stone subgrade,the response surface method was applied to optimize the pavement structure of asphalt surface,graded macadam base and stone subgrade. According to the new design index of the new specification for highway asphalt pavement design,the influence of the thickness of each pavement structure layer on the new index was analyzed. Taking the thickness of each surface layer and the thickness of base layer as constraints,the response surface optimization model was established by taking the number of fatigue cracking of asphalt mixture,the permanent deformation of asphalt mixture layer and the vertical compressive strain of roadbed top as response factors. The results show that the thickness of the surface layer has a significant effect on the permanent deformation,the number of fatigue cracks and the vertical compressive strain of roadbed top; while the thickness of graded macadam base layer has a little effect on the above three indexes.
引文
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[2]尚念宝.石质路基条件下沥青路面结构力学特性分析及ATB-30组成设计研究[D].西安:长安大学,2010.SHANG Nianbao.Mechanical Characteristics Analysis of Asphalt Pavement Structure and Research on ATB-30 Composition Design under Stone Subgrade Conditions[D].Xi'an:Chang'an University,2010.
[3]郑琦.山区高速公路石质路堑段路面结构优化研究[D].天津:河北工业大学,2011.ZHENG Qi.Study on Optimization of Pavement Structure in Stone Cutting Section of Mountain Expressway[D].Tianjin:Hebei University of Technology,2011.
[4]郜玉兰,赵队家,韩萍,等.重载交通下山区高速公路车辙病害原因分析及对策[J].公路,2011(1):114-118.GAO Yulan,ZHAO Duijia,HAN Ping,et al.Cause analysis and countermeasures of rutting disease in mountainous expressway under heavy traffic[J].Highway,2011(1):114-118.
[5]王学勤.山区高速公路石质路堑段沥青路面结构性能分析[J].公路交通科技(应用技术版),2014(9):76-79.WANG Xueqin.Structural performance analysis of asphalt pavement in stone cutting section of mountain expressway[J].Journal of Highway and Transportation Research and Development(Application Technology Edition),2014(9):76-79.
[6]袁玉卿,郭涛,王笑风,等.石质路基路面结构应力分析[J].郑州大学学报(工学版),2014,35(4):19-23.YUAN Yuqing,GUO Tao,WANG Xiaofeng,et al.Stress analysis of pavement structure based on rock subgrade[J].Journal of Zhengzhou University(Engineering Edition),2014,35(4):19-23.
[7]杨锡武,赵明阶,王昌贤.岩堆路基沉降稳定性及处治方法的离心模型试验研究[J].重庆交通大学学报(自然科学版),2009,28(2):236-240,322.YANG Xiwu,ZHAO Mingjie,WANG Changxian.Experimental study on settlement stability and treatment for cliff debris subgrade by centrifugal model test[J].Journal of Chongqing Jiaotong University(Natural Science),2009,28(2):236-240,322.
[8]贾学明,杨建国.土石混填路基强夯法施工质量无损检测技术[J].重庆交通大学学报(自然科学版),2008,27(增刊1):945-947.JIA Xueming,YANG Jianguo.Non-destructive technique of quality detection on soil-rock mixture embankment constructed by dynamic consolidation method[J].Journal of Chongqing Jiaotong University(Natural Science),2008,27(Sup1):945-947.
[9]董喆.响应面法在沥青路面结构优化中的应用[J].交通科技,2015(2):93-97.DONG Zhe.Research on asphalt pavement optimization by response surface[J].Transportation Science&Technology,2015(2):93-97.