ABSTRACT
The behaviour of tunnelling in the urban environment is mainly influenced by TBM geometry, face pressures, geotechnical parameters and hydraulic conditions. The calculation of settlements and face pressures is usually performed in an uncoupled fashion, without a direct correlation between face pressures and volume losses. A further difficulty in the assessment of existing structures arises from the significant amount of data that must be processed, such as building type, foundation type/depth, height and vulnerability to settlements and rotation. The “Digital Project” has been developed by SWS Engineering in order to overcome the above difficulties. The tool creates a database from BIM, GIS and CAD files, avoiding the tedious task of manual data insertion. Coupled analyses are then performed to determine the optimal face pressures, the settlement contours and evaluate the resulting damage class for each structure. These can then be visualised with widely known software (such as open-source QGIS) in an interactive and user-friendly way. Traditional building reports and spreadsheets are also easily generated. This paper illustrates the results obtained in the detailed design of an urban tunnel. The tool will also be used during the construction phase in order to adjust the results based on the encountered stratigraphy and data obtained from monitoring.
