饱和土沉积谷场地对平面P波的散射

Scattering of plane P waves in alluvial valleys with saturated soil deposits

把沉积谷软土场地用饱和多孔介质的Biot动力学理论模拟 ,周围的场地用单相介质弹性动力理论模拟 ,利用波函数展开法 ,在频域内给出了不同土层界面条件 (透水条件和不透水条件 )下具有饱和土沉积层的圆弧形沉积河谷场地对平面P波散射问题的解析解。利用该解分析了不同土层界面条件 。

The scattering and diffraction of plane P waves in circular alluvial valleys with soft soil deposits is studied in this paper with the deposits simulated by Biot dynamic theory for saturated porous mediam, and the half space assumed to be elastic single phase mediam. The Fourier Bessel series expansion technique is used to solve this problem. Numerical results are given to illustrate the influence of different interface condition and the saturation and porosity of the soil deposits on the surface motion.