S wave velocity and attenuation at Imperial College site

The boundary layer in Stokes' second problem is used to esimate dynamic permeability at the Imperial College site. <br><br>The results showed that (1) S wave in the borehole site is largely controlled by siltstone with porosity of 0.6; <br>(2) Theoretical estimation is consistent with measured permeability of S wave at the sonic band. <br>本研究采用斯托克斯第二问题（Stokes' second problem）中的边界层，对帝国理工学院场地的动态渗透率进行估算。 研究结果表明： （1）钻孔场地的横波（S wave）主要受孔隙率为0.6的粉砂岩控制； （2）理论估算结果与声波频段内横波的实测渗透率一致。