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  MOSE project Italy, Immersion of the Chioggia Flood Barrier Caissons

  The Mose Project is a system of movable barriers which will protect Venice and the lagoon from ever more frequent and intensive flooding. The Chioggia inlet is one of the three gaps between the sea and the lagoon where this barriers will be installed. The barrier of the Chioggia inlet consists of eight caissons, among which are two shoulder caissons and six gate caissons. The caissons (60x45x11,5m) are build in a dry dock close to the trench. A sheet pile wall (fig. 1) will form the trench in which the caissons shall be installed. After the fabrication of the caissons is complete, the dry dock is flooded and the embankment is dredged open. One by one, the caissons are floated and towed into position above the trench. Using a purpose build immersion pontoon here they will be placed on its final position. With only a tolerance of +/- 10 mm they will be installed on temporary jacks and with grouting the final position will be secured. After placing the caissons and M&E works are carried out. Finally, the steel gate panels are installed in the hinges.

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