冻土区宽幅沥青路面回弹弯沉控制方法

Control Method for Rebound Bending of Wide-width Asphalt Pavement in Frozen Soil Area

文中以宽幅沥青路面设计方案为例,通过将高液限土路基和上层填筑层融合为双层弹性体系,计算路基表面的竖向位移,将路基层间的结合条件大于荷载边界条件作为目标,计算路基顶面综合回弹模量参数,确定填筑材料的选择范围,实现对路面回弹弯沉的控制。现场试验结果表明,设计方法可以实现对路面回弹弯沉程度的有效控制。

With wide asphalt pavement design scheme as an example, by the high liquid limit soil subgrade and upper filling layer fusion into double layer elastic system, calculate the vertical displacement of the subgrade surface, the road base conditions greater than the load boundary conditions as the target, calculate the subgrade top surface comprehensive rebound modulus parameters, determine the selection range of filling materials, realize the control of pavement rebound bending. The field test results show that the design method can effectively control the degree of road rebound bending.