JZUS - Journal of Zhejiang University SCIENCE

Journal of Zhejiang University SCIENCE A 2008 Vol.9 No.5 P.589-599

Screening of plane S waves by an array of rigid piles in poroelastic soil

Author(s): Yuan-qiang CAI, Guang-ya DING, Chang-jie XU
Affiliation(s): MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Zhejiang University, Hangzhou 310027, China; more
Corresponding email(s): caiyq@zju.edu.cn, gyding321@yahoo.com.cn
Key Words: Array of rigid piles, Poroelastic soil, Theory of Biot, Scattering, Screening effectiveness

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Abstract: An array of rigid piles used as a screening barrier for plane shear (S) waves is investigated in a homogeneous unbounded space. The dynamic poroelastic theory of Biot is employed, under the assumption of an incompressible solid grain. Using Fourier-Bessel series, the problem of multiple scattering is solved by imposing continuity conditions and equilibrium conditions at the soil-pile interfaces with the translational addition theorem. A parametric analysis is conducted to investigate the influence of the permeability of poroelastic soil, separation between piles, number of piles and frequency of incident waves on screening effectiveness of the barrier, and the results are compared with those in an elastic soil medium. Computed results show that the intrinsic permeability of the soil medium displays an apparent effect on the screening of plane S waves.

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