浅地表地球介质特性与人类生产和生活息息相关。中国高速的城镇化进程中，为了合理开发、综合利用和有效保护浅地表地下空间，迫切需要准确和迅速地提供浅地表岩土体的物质组成及结构信息，这对浅地表地球物理提出了不少理论和实际问题。本项目拟通过多分量高频面波和浅层初至波联合分析研究浅地表介质的径向各向异性。第一，将径向与垂向分量获取的瑞雷波和P波数据结合，以P波初至旅行时反演提供可靠的Vp，通过联合反演瑞雷波频散曲线和H/V谱比（椭圆极化率）获取Vsv；第二，将切向分量获取的勒夫波与SH波数据结合，通过联合反演勒夫波频散曲线和SH波初至旅行时获取Vsh；第三，综合Vsv和Vsh，研究浅地表介质径向各向异性，以指导浅地表实际应用。由于综合利用了多分量面波和体波数据，可以增加对反演模型的约束，降低反演模型的多解性，获取准确的浅地表介质横波速度和径向各向异性参数，从而为地下空间合理开发和有效保护提供最新技术。

The Earth’s properties in the shallow subsurface are closely related to human’s daily life. The urbanization of China has great demand for the shallow subsurface space. Reasonable development, comprehensive utilization and effective protection of underground space have put forward numerous theoretical and practical problems on near-surface geophysics. This project is aimed to jointly analyze multicomponent seismic surface waves and first arrivals to obtain relatively accurate radial anisotropy of near-surface media. Firstly, with P-wave traveltime inversion providing P-wave velocities (Vp), Rayleigh-wave dispersion curves and H/V (ellipticity) curves extracted from vertical and radial components will be jointly inverted for the vertically polarized shear (SV) wave velocities (Vsv). Secondly, Love-wave dispersion curves and SH-wave travel times extracted from the horizontal component will be jointly inverted for the horizontally polarized shear (SH) wave velocities (Vsh). Thirdly, based on the reliable Vsv and Vsh, the radial anisotropy will be analyzed for near-surface characterization. The proposed methods based on multicomponent seismic surface waves and first arrivals will reduce the nonuniqueness and provide better constrained and more reliable S-wave velocity and radial anisotropy information in the shallow subsurface.