STUDY ON METRO-INDUCED ENVIRONMENTAL VIBRATION PREDICTION BASED ON HAMMER TEST METHOD

摘要

Metro-induced environmental vibration problem has attracted more and more attention.In the frequency domain, the environmental vibrations in different frequency bands induced by metro traffic have a nonnegligible influence on different types of vibration receivers.How to precisely predict metro-induced environmental vibration response in the time domain and the frequency domain is a difficult and urgent problem to be solved.By means of theoretical derivation and numerical simulation, the correctness of the theoretical basis and the accuracy of the prediction result by use of metro-induced environmental vibration prediction based on hammer test method were studied.The results demonstrate that the relationship between the tunnel-ground transfer rate function induced by metro train and the tunnel-ground transfer rate function induced by drop hammer is found; the theoretical basis of the vibration response prediction based on hammer test method is verified; the precise and quantitative metro-induced environmental vibration prediction in the time domain and the frequency domain can be achieved by use of this method which is based on hammer test.