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Summary

Two main types of engineering-geological maps have been developed in Yugoslavia: a) special engineering geological maps used to determine parameters of a seismic standard region and for seismic zoning; and b) special engineering-geological maps used in estimates of foundation conditions for future construction, which include data of seismic microzoning. For seismic zoning (type a) the factors of seismic-acoustic impedance, depth to ground water, bearing capacity, ground stability, and slope were used and the effects of each were weighted. For maps of type b) the criteria considered fundamental for seismic microzoning are basic seismic degree, seismic-acoustic impedance, microseisms, maximum acceleration, and seismic coefficient. Engineering-geological maps of type b) that show composition, bearing capacity, stability, slope, recent geological processes, groundwater data, and seismic coefficient offer both qualitative and quantitative data for use in construction.

Résumé

Deux grands types de cartes géotechniques ont été mis au point en Yougoslavie: a) des cartes géotechniques spécialement utilisées pour déterminer les paramètres d’une région séismique; et b) des cartes géotechniques spécialement utilisées pour évaluer les conditions de fondation d’une future construction, ce qui nécessite des données de microzonage séismique. Pour le type a (zonage séismique), on utilisa les facteurs d’impédance séismo-acoustique, profondeur du niveau hydrostatique, force portante, stabilité du sol, talus et on évalua les effets de chacun. Pour les cartes du type b, les critères considérés comme essentiels pour le microzonage séismique sont: le degré séismique de base, l’impédance séismo-acoustique, les micro-séismes, l’accélération maximale et le coefficient séismique. Les cartes géotechniques du type b, qui donnent la composition, la force portante, la stabilité, les talus, les processus géologiques récents, les données hydrogéologiques et le coefficient séismique, présentent à la fois des données qualitatives et quantitatives utiles à la construction.

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Bračinac, Z., Janjić, M. Engineering-geological maps of seismic regions. Bulletin of the International Association of Engineering Geology 18, 27–32 (1978). https://doi.org/10.1007/BF02635346

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