Computer Aided Design of Tunnel Based on Lonberg Algorithm and Intelligent optimization

The establishment of the spatial alignment model of the left and right tunnel axes is of great importance for the construction and operation of the tunnel. This paper presents a tunnel computer-aided design model based on Lonberg algorithm and intelligent optimization. First, the projection of the central axis of a single tunnel in the plane is assumed to be a straight line, and the central axes of the tunnel and the tunnel are in a plane perpendicular to the plane, so that the problem can be solved in the two-dimensional plane. Second, the projection of the two tunnels’ central axis on the plane, the elevation data on this projection plane are interpolated by three splines, and the interpolation function for each small distance is constructed, and the three-turn angle equation used to solve the coefficients is constructed using the function characteristics, and the three-turn angle equation is solved by Thomas’ algorithm to obtain the interpolation function of the central axis for each small distance. After the specific interpolation function is obtained, the curve integration of the segmentation function is performed using the Lonberg algorithm to obtain the total tunnel length after projection, and then the original tunnel length is calculated by projection inversion. Finally, using the fixed-step search algorithm, the 100-meter calibration is completed.