Abstract
Road construction is a complex and multipart work that is decisively depended on the geological investigation of the area of interest. The geological investigation, which ought to be carried out from the early stages of the study and construction, contributes significantly in the cost reduction and corresponding increase of the construction safety. The proposed methodology that should be implemented during the geological investigation for this kind of constructions includes geological mapping and construction of geological and engineering geological maps. These maps display, in each case, the necessary data and are supplemented by geological crosssections as well as stereographic projections (e.g. Schmidt diagrams), which evaluate the tectonic conditions of the area and the stability conditions of artificial road slopes. An example of geological investigation based on the above methodology is presented, regarding the Kastania section of the Veria - Kozani (old) national road.
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