Abstract: With the purpose of solving the problem of model sharing among stages of shield tunnel construction, an IFC-based data model of shield tunnel was built in previous research. Based on the IFC-based data model, a BIM-based shield tunnel structure information modelling method is introduced in this paper. According to the extended IFC description of shield tunnel information model, the modelling method of single segment and flow and process of tunnel axis are proposed. Based on this, a shield tunnel assembling method is built, as well as a flow chart and a parametric modelling method of shield tunnel. By this way, the BIM-based shield tunnel structure modelling method is formed. The modelling method is examined by applying it to a metro shield tunnel case. The research shows that, by introducing the concept and technology of BIM, it is suitable for the communication and sharing of the information of shield tunnel structure that builds the shield tunnel structure information model based on the uniform IFC standard. The validity of the IFC-based data model of shield tunnel is verified further. The result in this paper can provide the initial model for numerical calculation and analysis, and provide foundation for realizing seamless connection of visualization model and analytical model.

Key words: building information modelling, extension of industry foundation class, shield tunnel information model, modelling method