About the author:

China Railway 18th Bureau Group Third Engineering Co., Ltd., Zhuozhou, Hebei 072750, China

Abstract:

With the acceleration of urbanization, subway tunnels are increasingly constructed in proximityto existing buildings or facilities. Subway⁃induced vibrations, especially high⁃frequency ones, can affectthe surrounding environment and sensitive buildings, making the accurate prediction of vibrationpropagation a critical issue. This paper presents a vibration propagation prediction method based on atrain⁃track⁃tunnel interaction model and a ground wave propagation model. Field measurements andnumerical calculations validate the proposed method, revealing that high⁃frequency components attenuateunderground,while frequencies near 50Hz are significantly amplified at the ground surface. The train⁃track⁃tunnel interaction model effectively predicts the time⁃history acceleration levels of vibrations withintunnels,while 2D finite element analysis accurately predicts vibration attenuation and accelerationdistribution in both underground and surface areas. The findings provide a reliable theoretical basis forvibration control in subway construction and offer strong support for noise mitigation efforts, helping toreduce the impact of subway construction and operation on the surrounding environment.