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瑞利面波勘探已经广泛应用于工程地质勘探和工程质量检测等领域中。瑞利面波勘探频散曲线反演解释时主要考虑基阶模态面波。当地层中含有软弱层以及表层为高速层时,在高频段高阶模态面波相对基阶模的能量更占优势。在瑞利面波勘探频散曲线反演解释中,必须考虑高阶模态面波的信息;在高阶模态面波占优势时,同时利用多阶模态组合频散曲线(包括基阶、二阶、三阶、四阶等)进行反演解释。本文通过对软夹层型和地表为高速层两种高阶模态面波能量较强的地层结构的理论和实测多阶组合模态频散曲线的反演研究,获得了比仅利用基阶模态面波解释更好的效果。
Rayleigh surface wave exploration has been widely used in engineering geological exploration and engineering quality testing and other fields. Rayleigh surface wave exploration dispersion curve inversion interpretation mainly consider the first order modal surface wave. When the strata contain weak layers and the surface is high-velocity, the energy of the higher-order modes is more dominant than that of the first-order modes. In the Rayleigh wave surface survey, it is necessary to consider the information of the high-order mode surface wave. When the high-order mode surface wave predominates, the multi-mode modal dispersion curve (including the base order, the second order, Third-order, fourth-order, etc.) for inversion interpretation. In this paper, the theory of the stratum structure with strong energy of two kinds of high-order mode surface waves with soft interlayer and high-speed surface and the inversion of measured multi-mode combined modal dispersion curves are obtained. Waves explain better effects.