To reveal the seismic response of underground structures in coral sand, a series of shaking table model tests on underground structures at four different groundwater levels were carried out. The seismic responses of the coral sand and the underground structure were obtained and analyzed. The results showed that the excess pore pressure ratio and the liquefaction degree of coral sand increased with increasing groundwater level, resulting in a more significant separation between the sidewall and the surrounding soil. However, the acceleration amplification factor of the coral sand site, the dynamic strain and bending moment of the underground structure could be reduced. Moreover, the increase in the groundwater level contributed to the settlement of the ground surface. However, due to the presence of an uplift force caused by the liquefaction of the coral sand, the settlement of the underground structure decreased as the groundwater level increased. Furthermore, the distribution of the dynamic soil pressure under the groundwater level was found to be quite different from that under dry soil condition.

为了揭示珊瑚砂中地下结构的地震响应，对四个不同地下水位的地下结构进行了一系列振动台模型试验。获得并分析了珊瑚砂和地下结构的地震响应。结果表明，随着地下水位的升高，过剩的孔隙压力比和珊瑚砂的液化度增加，导致侧壁与周围土壤的分离更加明显。但是，可以减小珊瑚砂站点的加速度放大系数，地下结构的动态应变和弯矩。此外，地下水位的增加有助于地表的沉降。然而，由于存在由珊瑚砂液化引起的隆起力，地下结构的沉降随地下水位的升高而减少。此外，发现地下水位下的动态土壤压力分布与干旱土壤条件下的存在很大差异。