中文摘要：

饱和土中波的传播特征同单相介质情况具有显著差异。基于Biot理论，采用间接边界积分方程法，研究流体饱和半空间中夹塞物对平面SV波的二维散射。首先在夹塞物表面附近施加虚拟波源，分别构造夹塞物内外的散射波场，由连续性边界条件建立边界积分方程并离散求解。进而针对典型算例进行参数分析，结果表明：饱和半空间中夹塞物周围波的散射特征主要依赖于入射波频率和角度、边界渗透条件、夹塞物孔隙率和刚度、夹塞物形状等因素。最后探讨了各主要因素的影响特征，给出了一些重要结论。

英文摘要：

The wave propagation in saturated soil is significantly different from that in single-phased media. Based on Boit＇s theory, an indirect boundary integration equation method for scattering of plane SV waves by a two-dimensional inclusion of arbitrary shape in poroelastic half-space was provided. Firstly, the diffracted waves in inclusion and half space are constructed using the fictitious wave sources close to the interface between the inclusion and the half-space respectively, and the boundary integration equation are obtained and numerically solved by continue boundary conditions. It is shown by parameter analysis of the typical example that the diffraction of SV waves around an inclusion in poroelastic half-space mainly depends on the incident frequency and incident angle, drainage condition, the stiffness and porosity of inclusion, the inclusion shape, etc. Finally, the influence of above factors on wave diffraction are discussed, and several important conclusions were provided.