Abstract: Current numerical models of simulating the construction process of hydraulic tunnel perform incompletely as they are not integrated with 3D software thoroughly. In view of this, the theory and 4D technology of simulating hydraulic tunnel construction progress are studied based on BIM technology. Firstly, a 3D parametric model of hydraulic tunnel is established using CATIA, and then a simulation model for hydraulic tunnel construction is established in line with the construction characteristics and simulation principles. Finally, the 4D framework of simulating hydraulic tunnel construction is proposed. The construction progress can be inquired and the construction information can be displayed through the model. Practice has proved that the BIM-based simulation model could offer construction progress calculation and construction intensity query, thus improving management in the construction process.

Key words: hydraulic tunnel, construction management, BIM, simulation calculation, construction progress