摘要
以弹性层状体系理论为基础,采用轴载换算方法,以设计弯沉值、半刚性基层层底拉应力为换算指标,通过变换不同的结构层参数及轴距计算了组合结构层沥青路面轴载换算公式中的轴数系数,并通过程序计算得出了建议轴载换算公式。计算结果与我国规范的设计方法进行了对比分析。结果发现轴数系数与轴距及结构层参数关系密切,采用拉应力指标控制轴载换算比弯沉指标更为合理;该方法计算理论与我国规范规定的设计理论相适应,但计算所得的弯沉轴数系数与规范差异很大。因此,应加强实际应用,及时根据具体实例对其进行修正。
Applying the program based on layer-elastic theory, changing the value of structure-layer parameter and wheelbase, the axle -number coefficient in the axle-load conversion formula for combined base asphalt pavement is calculated in this text under the two different conversion guidelines of pavement deflection and stress under semi-rlgid base. Through programme computing, the recommended axle-number coefficient formula is given and comparisons are made with design methods used in China. It is found that the axle-number coefficient is closely linked with structure- layer parameter and wheelbase, and that the axle- load conversion under the conversion guideline of stress is more reasonable than that under the conversion guideline of pavement deflection.The calculating theory, is in conformity with the design theory under the specifications in China, but the calculating result is different from the criterion.Therefore, it needs to strengthen actual application and to revise the calculating result by specific examples.
出处
《公路交通科技》
CAS
CSCD
北大核心
2007年第2期52-55,共4页
Journal of Highway and Transportation Research and Development
关键词
弹性层状理论
组合基层
轴载换算
轴数系数
结构层参数
layer-elastic theory
combined base
axle-load exchange
axle-nurnber coefficient
structure-layer parameter
