In order to build a well-organized engineering geological information database
the exchange between users’ database and system database is put forward
by which the users’ operation and the procedure of computer are separated. The users’ database is users oriented
while the system database is for the management in the system. A new ground data model is proposed in the system database. This data model is about soil mass and a segment based on “the optimized stratigraphic sequence” of a region. By using it
complicated geological information can be expressed clearly; and drill holes of different stratigraphic sequences are united to a same structure. It can deal with some problems such as faults in the geological body