Environmental vibration pollution caused by city rail transit can’t be ignored. By means of in-situ test and theoretical analysis

the attenuation discipline of amplitude and frequency of ground vertical vibration acceleration with distance from track center line by Nanjing rail transit operation on ground has been obtained. With the horizontal distance between the test point and rail transit track increasing

the amplitude value of ground vertical vibration acceleration fades as a whole

but rebounds slightly at 20 to 30 m off track center line. Meanwhile the frequency of ground vertical vibration acceleration ranges from 0 to 100 Hz

and the dominant one is in the range of 30 to 80 Hz. With the distance from track center line increasing

the vibration signal component of each frequency also shows a fading tendency as a whole

and decays faster at the higher frequency. In view of Beijing Jiaotong University forecasting formula

a prediction model of ground vibration caused by Nanjing rail transit operation including the parameters of receiving point distance

the property of foundation soil and train speed has been constructed

and forecasts well compared with the actual measured data.