In response to the problems of frequent changes in railway tunnel portal engineering,complex calculation of engineering quantities and the inadequacy of traditional 2D design methods in terms of clarity,a portal scheme design system based on 3D scene development was proposed.By sorting out the design process and functional requirements,the key modules and functional architecture of the system were designed.The system generates a 3D spatial scene based on 3D terrain data and creates tunnel components parameterized by design data.It enables interactive design of tunnel slope,support measures and statistical calculation of related engineering quantities,thereby enabling rapid 3D design of tunnel portal engineering.The system can also quickly identify the bias voltage at the tunnel entrance by AI.The engineering application verification shows that the tunnel portal scheme design system based on 3D scene is feasible and can meet professional requirements,and can significantly improve design efficiency and quality.
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