本文对隧道计算机辅助设计软件开发的若干理论问题进行了分析,主要包括三维路线的合成、隧道横断面空间角度、纵向分布钢筋位置、拉结筋形式、钢筋弯曲直径、受力主筋配筋方式等六个基础性理论问题。本文在提出问题的同时,给出了自己的研究成果和具体解决方案,可为隧道计算机辅助设计软件的设计和开发者提供参考与借鉴。本文旨在抛砖引玉,望从事类似研究的同仁集思广益、相互交流、取长补短,以促进隧道CAD软件研发领域的长足发展。 This paper analyzes some theoretical issues in the development of computer aided design software of tunnels, including three-dimensional route synthesis, tunnel cross-section spatial angle, longitudinal distribution of rebar location, the form of steel bars, the bending diameter of steel bars, Six basic theoretical issues. This paper presents its own research results and specific solutions while asking questions, which can provide reference and reference for the design and development of tunnel CAD software. The purpose of this article is to start a discussion with the hope that colleagues who are engaged in similar researches will pool their ideas, exchange ideas and learn from each other to promote the rapid development of tunnel CAD software research and development.