Influence of soil around pile on vibration wave transmission and identification of pile defects
To solve the problem where the low-strain testing method for pile integrity can only qualitatively identify the level of pile defects and cannot quantitatively identify relevant issues,the governing equation of foundation pile considering the action of soils around the pile was established according to the dynamic theory,and the analytical solution of the velocity response of any section of the pile was obtained using wave theory.Through numerical simu-lation and from test results of model piles at different ages,with the increase in age,the soil damping around the pile was found to gradually increase,whereas the ratio of the reflected wave amplitude to the incident wave ampli-tude of speed gradually decreased.According to the attenuation law and the reflection law on the change in section impedance,a quantitative identification relationship of defect degree was established,which could be used to quan-titatively identify the defect level of a pile simply and rapidly.
pilevibration wavepile-soil interactiondampingpile top velocity responsereflection wavedefect levelquantitatively identify
万方数据
维普
