针对计算对象为复杂地层和有大型地下洞室群时 ,自动形成三维有限元计算网格较为困难的情况 ,提出了三维网格自动剖分的“断面节点控制法”。该法以地质勘探剖面图作为主控制断面 ,并在主控制断面上完成少量的前期数据准备 ,通过不同的合并、连接和插值 ,在全计算域上一次形成计算空间网格。多个工程计算实例表明 ,该法运用简单、适应性强、效率较高。 Aiming at the difficulty of automatically forming the three-dimensional finite element mesh when the calculation object is a complex formation and has a large underground caverns, the “section node control method” of automatic meshing of three-dimensional meshes is proposed. The method takes the geological prospecting section as the main control section and completes a small amount of preliminary data preparation on the main control section, and forms the computational space grid in the entire calculation domain through different merging, connection and interpolation. A number of engineering examples show that the method is simple to use, adaptable and efficient.