一种基于FWD测试的道路结构损伤识别方法

A Road Damage Identification Method Based on FWD Test

针对道路结构模量反演存在多解性这一难题,提出了一种改进的道路结构模量反分析方法。该方法分析了路面路基分别在设定为“软”、“硬”两个子层情况下路面弯沉盆的差异,提出了设置路基硬质下卧层方法,解决了计算弯沉盆收敛慢的问题;采用多层弹性层状体系算法,分析了路面反分析参数与测试参数的匹配性,进而对道路结构损伤情况进行识别,并通过实际案例证实了该方法的可行性。该方法为路基路面模量反算与损伤识别提供了一种有效的解决方案。

Aiming at the problem of multiple solutions in road structure modulus inversion,this paper proposes an improved method of road structure modulus inverse analysis.This method analyzes the difference of the bending basin when the subgrade is set as"soft"and"hard",and puts forward the method of setting the hard subgrade,which solves the problem of slow convergence of the bending basin.By USING THE multi-layer elastic layered system algorithm,the matching between the back analysis parameters and the test parameters is analyzed,and then the damage of the road structure is identified.The feasibility of the method is verified by a practical case.This method provides an effective solution for subgrade and pavement modulus reverse calculation and damage identification.