Abstract: At present shield tunneling method is applied more and more in underground tunnel construction. The standard ring and turning ring should be assembled to meet the design axis of curved section tunnel. The curve is composed of a circle curve and two relief curves, and the layout plan of the pipe sheet is determined by theoretical calculation of the turning Angle of the design axis and the deflection Angle of the pipe sheet in the turning circle. The 3D model of shield tunnel was established through BIM technology, and the theoretical layout was optimized. In addition, the assembly quality of tunnel segments in the construction process was simulated and the onsite construction of pipe segments was guided, so that the formed tunnel axis could better echo the designed axis and ensure the tunnel construction quality.

Key words: Tunnel, BIM technology, Tube layout, Site construction