A Study of the General Method Used in Geotechnical Engineering Numerical Calculating Grid of CAD Graph Cutting

Abstract

The author, based on the rock mass’ 3D modeling and solid graphics cutting method, advances a from-whole-to-part and from-part-to-whole rock cutting technology, which takes the rock faults and joint fissure of the original rock graphics as the geometric boundary, and takes the rock material division as mechanical control boundary. Being a carrier of grid, each basic rock’s geometry characteristics, topological relations (angle, edge, face, body, etc) and mechanical characteristics (e、μ、c、φ、κ, etc.) are all attached to the rock mass’s graphics. The relationship networks of every block are also stored. Such a collection of orderly and related graphical blocks provides the most basic and general database for all kinds of numerical calculations in geotechnical engineering. It can conveniently generate grid system according to different calculating requirements. After being exercised and examined in several projects, it is proved to have a good application prospect.