Hydrodynamic pressure and its effects on embedded tube tunnel in high permeable stratum

When dynamic loadings act on the embedded structure, vibration will be generated and transmitted to the surrounding ground causing dynamic deformation and stress of structure. A semi-analytical solution for hydrodynamic pressure of circular cavity in high permeable stratum using the conformal transformation method is proposed and the amplitude of hydrodynamic water pressure about the frequency is investigated under the harmonic vibration loadings. Furthermore, based on Kirchhoff - love assumption, considering the dynamic interaction of soil and tunnel structure, by means of numerical examples, the dynamic characteristics of a single embedded tunnel was analysed due to the hydrodynamic pressure, the calculation results show that, the vibration response of the tunnel structure is under the similar tendency for different water depth, but affected variously; the impedances of soil can significantly reduce the deformation and internal force of tunnel to a certain extent. (paper)