As a frequently-used non-contact detection method,ground penetrating radar plays an important role in the fields of engineering and geophysics.Based on the detection of a road disease and a shield tun-nel lining disease in Guangzhou,this paper analyzes the influence of low-frequency oscillation signals under different geological conditions,such as high water bearing strata,on the radar spectrum by comparing the radar spectrum of road subgrade detection and the density detection behind the shield tunnel lining,Higher filtering efficiency for interference signals and less loss of shallow effective signals;For low-frequency oscilla-tion signals with a fast rate of frequency change,the"Deconvolution"method is used to better highlight the characteristics of shallow defects,but the filtering efficiency of deep low-frequency oscillation signals is lower than that of"Band-stop filtering".
关键词
地质雷达/低频振荡信号/带阻滤波/反褶积
Key words
ground penetrating radar/low frequency oscillation signal/band-stop filtering/deconvolution
万方数据