CONSTRUCTION AND APPLICATION OF A GEOTECHNICAL DATABASE FOR PREPARARTION OF ENGINEERING GEOLOGICAL MAPS FOR NORTHWESTERN IRAN

A geotechnical database has been developed to act as a system for management tool for site investigation data. The system runs on a microcomputer and is capable of producing several sets of geotechnical maps and cross sections. The resulted analytical maps, clarify those factors, connected with soil features and their geotechnical nature which are of interest to engineers and planners for preliminary site evaluation. The engineering geological maps have the advantage that every one can give his/her own personal interpretation using such a map. The paper describes the database system and provides some of its applications in illustration of horizontal and vertical transition of lithof acies, modeling of groundwater flow, maps of N value and lithology in the horizontal plane for arbitrary depths, vertical changes of N values and lithology data, preparation of subsurface cross sections, dominate frequency analysis of the ground shake and cluster analysis of N values data.