华南地区沥青路面设计弯沉计算方法  

Calculating method of design deflection in asphalt pavement based on south China area

作　　者：冯志慧[1,2] 薛鹏涛 王荣华[2] 王钊 

机构地区：[1]河南农业大学信息与管理科学学院,河南郑州450046 [2]长安大学公路学院,陕西西安710064 [3]河南省交通运输厅公路管理局,河南郑州450016 [4]广东潮惠高速公路有限公司,广东广州510100

出　　处：《长安大学学报（自然科学版）》2013年第6期28-35,共8页Journal of Chang’an University(Natural Science Edition)

基　　金：交通运输部行业联合科技攻关项目(2009-353-344-600)

摘　　要：为了确定更加适合中国柔性沥青路面结构设计中的基层类型系数A。值，分析了现行沥青路面设计规范中设计弯沉计算方法、演变及在半刚性路面、柔性路面及组合式路面中的适用情况；结合中国8条高速公路沥青路面的实测弯沉指标，研究了柔性基层沥青路面设计弯沉计算体系，对沥青路面设计弯沉计算公式进行了标定；通过计算中国常见的半刚性、组合式、柔性路面结构中柔性结构层的总厚度及层底的受力状况，提出了沥青路面设计弯沉计算公式的适用条件。研究结果表明：在进行路面设计弯沉计算时，半刚性基层的路面结构类型系数A。取值1．0，柔性基层的A。取值2．4，组合式基层的A。取值采用线形内插法进行确定；沥青路面刚柔结构中柔性层厚度小于21cm时路面为半刚性结构，柔性层厚度大于35cm时路面为柔性结构，柔性层厚度为21～35cm时路面为组合式结构，该组合结构更符合中国目前柔性层路面结构实际情况。In order to determine a more suitable pavement structure type coefficient Ab for Chinese flexible asphalt pavement structure design, the design deflection calculation method, evolution and applicability in semi-rigid pavement, flexible pavement and composite pavement was analyzed in current asphalt pavement design specifications. Based on measured deflection indicators of 8 as phalt pavement expressways in China, the design deflection calculation system for flexible base asphalt pavement was studied, and the design deflection calculation formula was determined for asphalt pavement. Through calculating the thickness of flexible structure layer and strength per formance of bottom layer of flexible base pavement in semirigid pavement structure, composite pavement structure and flexible pavement structure, the applicable condition for design deflection calculation formula of asphalt pavement was proposed. The results show that in the design deflection calculation of pavement structure, pavement structure type coefficient Ab is 1.0 for semi-rigid base pavement, 2.4 for flexible base pavement and is determined using liner interpolation method for composite base pavement. In the flexible-rigid structure of asphalt pavement, the pavement is semi-rigid structure when the flexible layer thickness is less than 21 cm, and is flexible structure when the flexible layer thickness is more than 35 cm. The pavement is composite structure when the flexible layer thickness is between 21 cm and 35 cm, which is more suitable for current flexi ble pavement structure in China. 1 tab, 12 figs, 15 refs.

关 键 词：道路工程 沥青路面 设计弯沉 力学分析 弯拉应力 柔性基层 

分 类 号：U416.217[交通运输工程—道路与铁道工程]