Abstract
Abstract The use of engineering geological information systems consisting of geotechnical information obtained from site investigations and ground water levels forms a powerful new dimension in planning of tunnels with respect to anticipating hazards and design problems. A pilot study was initiated in 1986 to produce an engineering geological information system for a 4-km 2 area of the west-central district of Amsterdam. The information system contained cone penetration profile data, as well as information on boreholes and groundwater levels. The system has been shown to work using standard database and mapping programes to produce thematic maps which can be used in tunnel planning and design. Reference is made to the proposed north-south undeground light-railway line for Amsterdam to provide planning examples for which such an information system would be of relevance. The fact that these two projects ran concurrently but covered different areas of Amsterdam only emphasizes the need for tunnel planners and engineering geologists to become more aware of each other's needs. Use of information systems in tunnel planning has been successfully undertaken for the recent aqueduct tunnels of London.
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