准饱和土地基中瑞利波的传播特性  

Propagation Characteristics of Rayleigh Waves in a Partially Saturated Soil

作　　者：周新民[1] 夏唐代[1] 薛威[1] 

机构地区：[1]浙江大学岩土工程研究所,浙江杭州310027

出　　处：《公路交通科技》2005年第S1期100-103,共4页Journal of Highway and Transportation Research and Development

摘　　要：基于Biot两相饱和多孔介质理论,推导了准饱和土中瑞利波弥散特征方程,并研究了饱和度对准饱和土中瑞利波的弥散特性和位移分布的影响。结果表明,气相的存在对准饱和土中瑞利波速及弥散特性影响不大,但含气量变化对土骨架和流相的位移会产生很大的影响。The secular equations of Rayleigh wave propagation in partially saturated soil are derived based on the Biot's theory of wave propagation in porous two-phase media.And the saturation effects on dispersion characteristic and displacement distribution of Rayleigh wave in partially saturated soil are discussed.It shows that the air phase effects on velocity and dispersion of Rayleigh wave propagation are negligible,but the saturation has a great effect on the displacement of the soil skeleton and fluid phase.The propagation depth of the first mode of Rayleigh wave is about one and half wavelength.

关 键 词：准饱和土 瑞利波 特征方程 弥散性 

分 类 号：TU435[建筑科学—岩土工程]