Seismic Interferometry Method Based on Hierarchical Frequency Fusion and Its Application in Microtremor Survey

Site velocity structure determination and stratigraphic division are important purposes of microtremor survey, the precision dispersion curves is an factor affecting accuracy survey. In order to obtain more accurate curve S-wave structure, this paper proposed a processing method based on hierarchical frequency fusion seismic interferometry. Analysis was performed link between station pair spacing component collected signal dependability exploration depth. A mathematical model distances reliable frequencies were achieved through relationship distances. Then, criterion determine boundary frequency, pairs with different fused final curve. Finally, obtained s-wave conversion from shallow layers deep ones. The applied survey high-rise building site in Xiamen. rectangular observation array arranged, extracted processed using traditional superimposed averaging method, obtained. experimental results show that better agreement borehole than which shows its effectiveness application prospect.