基于高分辨率Radon变换的瑞利波反演在役路基动模量

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振动与冲击 ›› 2022, Vol. 41 ›› Issue (10) : 244-251.

论文

杨博1,2,3，龙友明1，刘境奇1，汤跃文1

作者信息 +

Rayleigh wave back-calculation for the dynamic modulus of subgrades in service based on the high resolution linear radon transform

YANG Bo1,2,3,LONG Youming1,LIU Jingqi1,TANG Yuewen1

Author information +

文章历史 +

摘要

为了探索在役路基动模量的一种动态反演与成像方法，本文通过瑞利波在弹性层状体系中的理论频散方程，揭示了瑞利波在基准路基路面结构中的理论频散特征，基于高分辨率线性Radon变换建立了路基路面结构中瑞利波频散曲线的提取方法。在结合高分辨线性Radon变换提取的频散曲线与路基工作区细化分层的基础上，建立了在役路基工作区动模量的反演成像方法。通过在足尺道路试槽内点对点依次进行瑞利波、FWD、承载板和弯沉测试，建立了各测试指标之间的关系。结果显示：瑞利波反演的路基动模量与其它测试方法相应结果的相关系数均大于0.80，且反演成像结果能够正确、清晰地反映路基承载能力与压实工况。

Abstract

In order to explore a dynamic inversion and imaging method of dynamic modulus of Subgrade in service, this research revealed the theoretical dispersion characteristics of Rayleigh wave in the base subgrade and pavement structure by using the theoretical dispersion equation of Rayleigh wave in elastic layered system. Based on the high resolution linear Radon transform, the extraction method of Rayleigh wave dispersion curve in subgrade pavement structure was established. Based on the combination of the dispersion curve extracted by high resolution linear Radon transform and the subdivided layer of subgrade working area, the inversion imaging method of dynamic modulus in the working area of Subgrade in service was was put forward. Through the Rayleigh wave, FWD, bearing plate and deflection tests point-to-point in the full-scale road test slot, the correlations between each measurement index were established. The results show that all the correlation coefficients are more than 0.80 to indicate the back-calculation imaging results can accurately and clearly reflect the subgrade bearing capacity and compaction conditions.

导出引用

杨博1,2,3，龙友明1，刘境奇1，汤跃文1. 基于高分辨率Radon变换的瑞利波反演在役路基动模量[J]. 振动与冲击, 2022, 41(10): 244-251

YANG Bo1,2,3,LONG Youming1,LIU Jingqi1,TANG Yuewen1. Rayleigh wave back-calculation for the dynamic modulus of subgrades in service based on the high resolution linear radon transform[J]. Journal of Vibration and Shock, 2022, 41(10): 244-251

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