The Influence Characteristics of Urban Hard Pavements Surface on Noise Sources Wave Data and its Optimized Processing Method
The dense population,extensive traffic roads,and numerous buildings in cities have brought many inconveniences to geological exploration in urban underground spaces,a-mong which,passive source surface wave exploration methods have shown good adaptability to the complex urban environment and have been widely applied.However,the influence of urban hardened road surfaces on surface wave exploration cannot be ignored,especially in the context of high-resolution exploration of shallow seismic waves in cities.This study con-ducted field experiments on the roads in the Lijiang District of Guangzhou City,aiming to analyze the impact of urban hardened road surfaces on the acquisition and processing of pas-sive source surface wave data.High-speed direct waves in the urban hardened road surface were found to have velocities higher than the surface waves and seriously affect the extraction of surface wave dispersion curves.And a high-speed direct wave suppression method based on frequency-wave number domain filtering(F-K filtering)was proposed to effectively recov-er the dispersion components of the subsurface medium surface waves.The successful appli-cation of this method provides an effective data processing approach for surface wave explora-tion on urban hardened road surfaces.
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