Abstract:In recent years, with the advancement of urbanization, underground construction is increasing. Blasting construction is a common construction method, which has randomness, harmfulness and complexity, and has a great influence on surrounding buildings and existing lines. Therefore, it is indispensable to study the effects of blasting vibration effects. In China, the blasting vibration velocity is the basis of blasting vibration intensity. The factors such as blasting charge, blasting distance and elevation difference will cause large differences in blasting vibration velocity, resulting in irreversible effects. In order to optimize the blasting vibration velocity attenuation model to predict the blasting vibration effect, this paper combined multiple blasting and one blasting multiple monitoring points to compare and analyze the effects and applicability of different blasting vibration velocity prediction models, based on the engineering background of a station in Qingdao Metro. The results show that blasting vibration has a great influence on the cavity effect during the propagation of the ground. And blasting vibration effect is the result of the comprehensive action of many factors. The more factors involved in the model, the closer the result of the blasting vibration velocity prediction model is to the measured value. The piecewise prediction model based on the cavity effect can effectively predict the attenuation law of blasting vibration on the ground, which is a reference for similar engineering. It is concluded that in the face of complex blasting construction site, the selection of blasting vibration velocity attenuation model should be carried out according to the conditions.