Study on the Metro‐Induced Vibration Impact on Ancient Tower and Control Methods: A Case Study of the Dashan Tower in Shaoxing

Metro operation induces ground vibrations, posing a significant risk to adjacent vibration‐sensitive buildings such as ancient architectural structures. Field vibration tests were implemented to investigate the impact of metro moving loads on Dashan Tower. A finite element model integrating the metro moving load, multilayered foundation, and tower was established to analyze the vibration characteristics of the ground and the structure, and numerical simulations were performed to study vibration isolation measures and their effectiveness. The results reveal that ground vibrations around Dashan Tower induced by metro loads are dominated by vertical low‐frequency vibrations below 10 Hz. The low‐order mode shapes of Dashan Tower are characterized by lateral sway, with a natural frequency of approximately 0.4 Hz. Vibration isolation trenches can effectively attenuate vibration propagation, whereas the isolation effect of pile barriers is markedly affected by the number of pile rows, pile spacing, and pile length. With the optimized vibration isolation pile scheme, vibrations induced by metro moving loads near the tower achieve a reduction of approximately 40%. The approaches adopted and results obtained in this paper provide reliable reference for vibration analysis and control for ancient towers.