关键词: 振动评价, 质点峰值振动速度（PPV）, 监测试验, 频带能量, 振动敏感性

Abstract: The influence of the vibration wave generated during the operation of the high-speed railway train on the building structure along the line can not be ignored, and the vibration evaluation method suitable for the building structure around the high-speed railway line is of great engineering significance. Firstly, a calculation formula of equivalent particle peak vibration velocity (PPV) is developed based on Sadowski formula and the principle of building structure response under harmonic excitation. Then the field soil monitoring test is carried out to analyze the attenuation characteristics of particle peak vibration velocity of vibration signal; and wavelet packet transform is used to analyze the frequency band energy characteristics of vibration signal so as to theoretically derive the equivalent PPV. Finally, the allowable vibration value of the building under the existing traffic vibration is taken as the evaluation standard to estimate the vibration safety of the building structure around the high-speed railway line. The results show that except for the position with significant local magnification, the attenuation formula of the peak particle velocity of the high-speed railway vibration wave in the pier foundation of the viaduct has a good fitting result to the actual peak particle velocity as a whole. Based on the vibration evaluation method of equivalent PPV, it is found that at 45 m distance from vibration source, the 0−10 Hz equivalent PPV value of G924 train is greater than 1 mm/s, which exceeds the vibration tolerance value of vibration sensitive and protective buildings. Compared with the existing vibration evaluation, the equivalent PPV vibration evaluation method has the advantages of high vibration sensitivity, vibration control for specific building structures, and vibration evaluation before the location of the buildings around the high-speed railway line.

Key words: vibration evaluation, peak particle vibration velocity (PPV), monitoring test, frequency band energy, vibration sensitivity