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孔隙海床在波浪荷载作用下其有效应力减小、孔隙水压力增加,这将影响孔隙海床中隧道的稳定性,因此,研究在波浪荷载作用下孔隙海床与隧道的动力响应具有重要的工程意义。本文基于Biot的动力固结理论和弹性动力学理论建立波浪荷载作用下孔隙海床与海底隧道的动力分析模型,并同时考虑海底隧道与海床之间的接触效应、边界效应等对海底隧道内力的影响。最后通过变换海床的变形模量、渗透系数和海底隧道的半径、埋深等,观察其对海床土孔隙水压力和海底隧道内力的影响,为海底隧道的设计提供依据。
The effective stress decreases and the pore water pressure increases under the influence of wave loads, which will affect the stability of the tunnel in the seafloor. Therefore, it is important to study the dynamic response of the pore seafloor and the tunnel under wave loads Engineering significance. Based on the Biot’s theory of dynamic consolidation and the theory of elastic dynamics, this paper establishes the dynamic analysis model of the seafloor and the seafloor tunnel under the wave load. At the same time, considering the contact effect and boundary effect between the seafloor tunnel and the seafloor, Impact. Finally, the deformation modulus of seabed, permeability coefficient and the radius and depth of subsea tunnel were observed to observe the influence of pore water pressure on seabed soil and the internal force of subsea tunnel, which provided the basis for the design of subsea tunnel.