Assessment on the Engineering Geological Conditions of the Eastern Urban Area of Thessaloniki Basin, in Northern Greece, Using a Geotechnical Database
The design and construction of underground and above ground projects in the urban environment of Thessaloniki in Northern Greece face several geological challenges. Determination of engineering geological conditions is a crucial factor for planning and designing geotechnical works. A large amount of geological and geotechnical data is being stored in a georeferenced database for that purpose. The data that are processed are based on borehole geological information, laboratory testing, geotechnical characterization and in situ field tests. The processing and assessment of this information leads to the identification of useful value ranges for several physical and mechanical geotechnical parameters, for instance SPT, uniaxial compressive strength, Atterberg limits, permeability tests and particle size analyses. Thematic maps that reference geological and geotechnical factors were constructed by means of data analysis and correlation procedures. These maps provide public and private information serving multiple purposes such as new construction projects, seismic hazard design and management of natural disasters. This study focuses on the Eastern part of urban Thessaloniki, highlighting the in situ conditions of Quaternary and Neogene deposits with the construction of 2-D profiles and 3-D models. In addition, hazardous zones are identified in order to illustrate the regions geotechnical properties. The purpose of this investigation, besides incorporating new data, is to provide a tool for summarizing data into useful information formats in order to estimate the geological conditions and geotechnical properties of formations similar to the study area while providing a detailed outline of the methodology which was followed.
KeywordsUrban geology Geotechnical parameters Quaternary and neogene deposits Engineering response Geotechnical database
The authors would like to thank the Central Laboratory of Public Works, Geognosi S.A. as well as Attiko Metro S.A. for the data provided.
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