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Foundation of a bridge over the Danube river in Bratislava (Czechoslovakia) in faulted granitoids

La fondation d'un pont sur le Danube à Bratislava (Tchécoslovaquie) dans un granitoide faillé

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Abstract

A new bridge has been constructed over the Danube in Bratislava, supported by 8 piers. With regard to expected good foundation conditions a statically indeterminate construction was designed. The allowable settlement of individual piers ranged between 10 and 15 mm. In foundation pits, situated in the river bed and on the north bank, crush breccia and gouges were found. This made the expected settlement problematic. For that reason pressuremeter tests in foundation ground under pier P3 in the river bed were performed. The pressurementer modulus of jointed granodiorite, crush-breccia, and tectonic clay were calculated. The settlement of the pier, calculated on the basis of these results, was consistent with the permissible value.

Résumé

On a construit un nouveau pont sur le Danube supporté par 8 piliers. Eu égard aux bonnes conditions de fondation prévues on a projeté une construction statiquement indéterminée. Le tassement admis pour les piliers individuels varie entre 10 et 15 mm. Le puits de la fondation pratiqué dans le lit et sur la berge nord contient de la brèche noyée et de l'argile tectonique. Ceci a rendu le tassement attendu problématique. Pour cette raison on a effectué des essais pressiométriques dans le terrain de la fondation sous le pilier P3 du lit de la rivière. Le module pressiométrique de la granodiorite, de la brèche broyée et de l'argile tectonique a été calculé. Le tassement du pilier calculé sur la base de ces résultats est compatible avec la condition donnée.

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References

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Mirko, M., Rudolf, O. Foundation of a bridge over the Danube river in Bratislava (Czechoslovakia) in faulted granitoids. Bulletin of the International Association of Engineering Geology 43, 69–73 (1991). https://doi.org/10.1007/BF02590172

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  • DOI: https://doi.org/10.1007/BF02590172

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