Based on Visual C # 2008.NET development environment

using AutoCAD ActiveX technology

a redevelopment on AutoCAD2008 is carried out; and an object-oriented program which can rapidly establish 3-D finite element model of initial stress field back calculation. is also developed. The program can automatically calculate the grid nodes’ ground elevations to a certain extension that could be applied to change ground-lines for finite element model. This avoids trivial artificial reading on CAD relief maps to get the surface elevations which would make big errors

thus greatly enhance the efficiency and accuracy. It’s rapid and convenient. The program can rapidly and automatically establish the finite element mesh model used to the initial stress field back calculation and the model could better simulate the state of ups and downs of the topography so as to provide a better base condition for the finite element calculation.