Development Status and Scale Analysis of Mechanical Three-Dimensional Parking Garage—Taking Xi’an as an Example

The three-dimensional parking garage has become an effective way to alleviate the problem of urban parking. In this study, through the investigation and analysis of the current situation of the three-dimensional parking garage in Xi’an, the parking rules and infrastructure characteristics of the three-dimensional parking garage are mastered. Then, based on the queuing theory, the quantitative model relationship between the parking scale and the average parking time, as well as the number of parking units and the average service time, is explored. Based on the loss rate, the reasonable number of parking scale and parking units is determined, respectively, and then the reasonable number of layers of the lifting and shifting parking garage is determined. Finally, the model is applied to the building of Xi’an Saige Computer Mall. The research results have important theoretical and practical significance for the planning and construction of the three-dimensional parking garage.