Surface Wave Dispersion Curve Inversion Based on Active and Passive Source Dispersion Curve Splicing Strategy
Surface wave exploration is one of the main methods of shallow surface explora-tion.The traditional active source surface wave method usually probes at a depth of 30m,and its effect is severely limited in the urban environment with complex noise interference.Passive surface wave uses background noise as signal source,which has large detection depth but poor resolution to shallow medium.This paper proposes a surface wave data processing method with both active and passive sources,which takes into account exploration depth and shallow resolution.Firstly,the dispersion curves of active and passive source data are spli-cing to obtain a broader multi-order dispersion curve.Secondly,Numerical simulation and inversion were used to verify the validity of the splicing strategy of active and passive surface wave dispersion curves.Through the measured data processing,the inversion effect of the active source method and the splicing strategy is compared and analyzed.It is proved that the splicing strategy of the active and passive source dispersion curves can effectively improve the accuracy of the inversion results.This strategy solves the problem caused by the limited en-ergy band of a single source and provides a new method for surface wave exploration.
NETL
NSTL
万方数据
维普
