BIM is a discipline that combines construction engineering and information science, which can well solve the relevant problems arising in urban human defense projects and also improve the efficiency of visualization. Firstly, the acoustic wave sensor is used to obtain the acoustic wave monitoring data of the building construction site, and for the data with noise, the Kalman filtering method can be used for denoising, so as to obtain the real building construction site data. According to the real data of the construction site after noise reduction, the BIM model of the construction site is established, and a non-contact acoustic wave monitoring data processing method based on BIM technology is designed. Starting from the definition scope of the civil defense project, the computational research program of BIM technology in the reinforcement design of the civil defense project is formulated, with the help of which the reinforcement design of the civil defense project is explored and analyzed. In the time interval of 120ms and 765ms, the reinforced civil defense project shows excellent impact resistance performance, and the displacement slope of the project reinforced nuclear level 6 civil defense wall is significantly larger than that of the nuclear level 5 civil defense wall. In summary, the method of this paper has an important guiding value to improve the safety and stability of the human defense project, and accelerate the pace of highquality development of the building.
