Abstract:BIM+GIS technology is mainly applied in the design phase including the optimization of ventilation scheme, optimization of drainage design, digital design and virtual construction of bifurcated tunnel, and detailed design of bridge-tunnel connection. Through the combination of two and three-dimensional designs, the design quality of complex nodes of the tunnel is improved and the design intent is more easily conveyed. The design schemes and effects of tunnel ventilation and drainage are dynamically simulated in order to provide the scientific guidance for the later operation. BIM+GIS technology efficiently selects the optimal route to simulate the construction and optimize the design scheme in order to evade the safety risks of later construction. BIM technology is used to solve the design problems of extra-long tunnel. The solutions are proposed and the good results are achieved, which has the strong reference significance for similar projects, and has a certain value of popularization and application.
