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面波频谱分析法(SASW)作为一种横向分辨率较高的瑞雷面波勘探方法,由于计算得到的基阶面波频散曲线存在较大误差以及无法获得高阶模式频散曲线而在应用中受到限制.通过应用Fourier变换方法(FT法)分离提取面波各模态数据,进而对分离后的各模态数据利用SASW法计算频散曲线.通过模型实例分析得出:(1)利用SASW计算基阶面波频散曲线时必须分离得到基阶面波数据,然后计算才能得到正确的结果;(2)基于多模态分离的SASW法可以计算得到面波高阶模式的频散曲线.
Surface wave spectrum analysis (SASW), as a method for prospecting surface wave with high horizontal resolution, has large errors in the dispersion curve of the fundamental order surface wave obtained and the high-order mode dispersion curve can not be obtained The application of Fourier transform method (FT method) to separate and extract each mode data of surface wave, and then use the SASW method to calculate the dispersion curve for each mode data after separation.From the model example analysis: (1) The first order surface wave data must be separated when SASW is used to calculate the dispersion curve of the second-order surface waves and then calculated to get the correct result. (2) The SASW method based on multi-mode separation can calculate the dispersion curve .