基于动变形控制法的软岩路基填筑材料回弹模量控制

根据路基路面变形协调原理,结合国内公路相关规范对路面弯沉的控制标准,获得软岩路基顶面动变形允许值;利用传递-反射矩阵方法和叠加原理推导了双轮胎振动荷载作用下弹性层状公路结构的动力响应解;采用Hankel数值逆变换技术计算出实例工程中典型软岩公路路基顶面的动变形,基于动变形控制法确定了不同软岩填筑区域对应填料的回弹模量临界值;根据现有公路规范规定的路基结构层厚度,提出满足动变形条件下的软岩填筑区域所需回弹模量控制要求,并以回弹模量为依据对软岩填料进行了分类.研究成果可为软岩填料分区优化填筑提供指导.

The Control of Resilient Modulus of Soft Rock as Filling Material for#br# Subgrade Based on Dynamic Deformation Control Method

Based on deformation compatibility principle of subgrade and pavement, combined with the pavement deflection control standard of current highway related code, the tolerance value of dynamic deformation of soft rock subgrade top is obtained. The theoretical solutions of elastic multilayered road structures under dynamic double circular loads are derived by using the transmission reflection matrix method and the superposition principle. The dynamic deformation of soft rock subgrade top is deduced with inverse Hankel transformation. The critical value of resilient modulus of soft rock filled in area is determined based on the dynamic deformation control method. According to the thickness of the subgrade structure provided by the existing highway code, control requirements of the resilient modulus of the soft rock filler satisfying the condition of dynamic deformation is put forward, and the soft rock filler is classified according to the resilient modulus. The results of this research can provide guidance for the optimization of the soft rock filler.