基于两点路表弯沉反算土基回弹模量的研究(英文)

Backcalculation of Resilient Modulus of Subgrade Based Two Point Surface Deflections

基于层状弹性理论,利用远离承载板中心的两点路表变形响应反算土基回弹模量。根据半刚性基层沥青路面常用路面结构组合形式,构建土基回弹模量与两点路表弯沉值之间一一对应的数据库,建立回归模型。由理论弯沉盆和实测弯沉盆的预测结果表明,建立的土基回弹模量回归预测模型具有良好的精度和可靠性,为进一步快速、有效地评定土基的承载能力提供了依据。

Based on the layered elastic theory, the resilient modulus of subgrade was backcalculated using two point surface deflection responses of pavement structure where were further away from the center of bearing plate. According to the combinations of asphalt pavement on semi-rigid road for high-class highways in common use, the database of structural parameters and corresponding two point surface deflections was established and the regressive models were developed to backcalculate the resilient modulus of subgrade. The predictive results of theoretical and measured deflection basins showed that the regressive model of resilient modulus of subgrade was of good accuracy and reliability. It provids evidences to ranirlly and effectively evaluate the bearing capacity of subgrade.