重载交通下半刚性基层路面荷载敏感性试验及对策措施

应用Shell法的BISAR程序,计算不同轴重条件下半刚性基层各层的层底拉应力,并分析重载作用下路面疲劳寿命的相对降低趋势,在此基础上分析基层模量和基层厚度对路面疲劳性能的影响,提出了重载道路路面结构设计应优先增加基层厚度的观点。

Load Sensibility Test of Pavement with Semi-Rigid Base under Heavy Traffic and Countermeasures

Using BISAR program of Shell method,the paper calculates the bottom tensile stress of each layer of semi-rigid base under various loading conditions and analyzes the comparative reduction current of pavement′s fatigue life under heavy loading.On this basis,the paper analyzes the impact of base module and base depth on the fatigue performance of pavement,and proposes the viewpoint that the base depth should be increased first in pavement structure design of overloading road.