BIM-based highway tunnel end wall type tunnel portal design method

The invention discloses a BIM (Building Information Modeling)-based highway tunnel end wall type tunnel portal design method, which comprises the following steps of: establishing parameterization units of various components of a tunnel portal, modifying default parameters of the parameterization units of the various components, and accurately establishing a BIM design model of the end wall type tunnel portal, so that accurate establishment of a three-dimensional design model of the end wall type tunnel portal of a highway tunnel is realized; and outputting drawings and engineering quantities to achieve the purpose of quickly modifying and finishing the design delivery of the end wall type tunnel portal of the highway tunnel. Compared with a two-dimensional design mode, by making a three-dimensional parameterization unit and extracting a built-in parameter list of the unit, the end wall type tunnel portal BIM model can be rapidly generated in a one-key mode through a tool interface and setting design parameter