Development of the design and calculation module of foundations based on GIS platform is one of the important contents of information management system of major projects. It can use the time-depended renewed dynamic data from the database efficiently to improve the efficiency of design and calculation and can provide a technical support for the design and construction of projects. On the basis of rock and soil mechanics and the designing standard of related specialty

by taking the MAPGIS as a developed platform

the main point is focused on some key problems and their visualization technologies such as designs of piles

composite foundations of soft clay

supporting of surrounding rocks of tunnels as well as slope reinforcement by combining with database technology and C＋＋ program technology etc.. The module which is built up by these technologies can automatically transfer the data from the database to calculate and design for piles

composite foundation and supporting of tunnels

and also to give an analysis of slope stability; furthermore

to provide a function of memory and inquiring of data. By associating with the development of underground environmental information system in a major project

Water Supply Reconstruction Project from Dongguan to Shenzhen of Guangdong Province in China

this paper is focused on the details of function design and realization methods as well as their application to the major project. The research results show that developed module in the GIS is proved to be effective.