由于二维测量断面间距过大、地形资料离散性应用方式等因素影响，目前隧道洞口工程二维设计存在设计精度不高、工程量计算不精确的问题。为解决这些问题，结合隧道洞口工程设计流程和信息化、智能化设计理念，基于三维设计软件平台，研发出一套集成隧道洞口边仰坡开挖、洞口开挖回填、洞门结构生成、截水天沟布置、洞门工程量计算等功能的隧道洞口工程三维自动化设计方法。应用表明，该成套方法可对传统的隧道洞口设计方法进行改善和提升，增强设计过程的便利性，提高设计成果的准确性，为工程信息的全寿命期应用提供基础条件。

Twodimensional design of tunnel portal engineering has poor design accuracy and engineering quantity calculations due to the considerable distance between measurement crosssections and discrete application of the measurement data. Accordingly, a threedimensional automatic design software for tunnel portal engineering is developed based on the design process of tunnel portal engineering and the concept of informatized and intelligentialized design, integrating the functions of slope excavation, tunnel portal excavation and backfilling, tunnel portal structure generation, water cutoff trench layout, and quantity calculation. The application results reveal that the recommended method can improve the traditional tunnel portal design methods with better convenience and accuracy of the design results. Thus, this method provides the primary conditions for applying engineering information throughout the entire life cycle.