According to the character of bad geology surroundings and scarce basic information in process of underground engineering designs

the technology of information design is discussed and analyzed combining a tunnel project. A project-database information management system is designed and developed. With the offset data obtained by in-situ construction method monitoring

the mechanical feature parameters of surrounding rock are obtained with optimal back-analysis method. The displacement of surrounding rock is calculated and the stability of surrounding rock is analyzed during tunnel construction progress by three-dimensional nonlinear finite element method with these obtained mechanical feature parameters.