<p>Based on the engineering background of Line 6 passing through the ancient platform foundation of the bell tower in Jinan, this paper aims to investigate the influences of subway-induced vibrations on the ancient buildings. First, field measurements are conducted to evaluate the vibration of the platform foundation submitted to the road traffic. Besides, a tunnel-soil-platform foundation coupled three-dimensional(3D) finite element (FE) model is established, and the vibrations and mitigation performance of the platform foundation under subway loadings are predicted. On this basis, the to-be-rebuilt bell tower is assembled with the established 3D FE model, and the vibration impact on the platform foundation caused by the reconstruction of the bell tower is studied. The results show that, under the separate action of the road traffic and the subway loading, the vibration level of the platform foundation can meet the requirement defined for ancient buildings in the Chinese standards. There existed a vibration amplification zone for subway-induced ground vibrations, where the platform foundation is located at. The platform foundation shows a good vibration mitigation performance, especially for medium and high-frequency vibrations. After the reconstruction of the bell tower, the peaks of vibration accelerations on four corner points decreased, while it is on the contrary for the center point. It is generally feasible to reconstruct the bell tower on the remaining platform foundation.</p>