Abstract: A dry setting installation (1) for generating a substantially dry working space for carrying out work at an underwater structure. The dry setting installation (1) has two side-walls (2), a back wall (3) and a bottom (4) thus forming a cofferdam. The dry setting installation furthermore has, for each side-wall, a side edge sealing (20) provided on the side-wall (2) edge for providing a substantially sealing contact between the side-walls (2) and the underwater structure. The dry setting installation also has a distance variation system (30) for varying the distance between the side edge sealing system (20) of the two side-walls (2).

Abstract: The present invention relates to a dry setting installation (1) for generating a substantially dry working space for carrying out work at an underwater structure. The dry setting installation (1) comprises two side-walls (2), a back wall (3) and a bottom (4) thus forming a cofferdam. The dry setting installation furthermore comprises, for each side-wall, a side edge sealing means (20) provided on the side-wall (2) edge for providing a substantially sealing contact between the side-walls (2) and the underwater structure. According to embodiments of the present invention, the dry setting installation also comprises a distance variation means (30) for varying the distance between the side edge sealing means (20) of the two side-walls (2).

Abstract: The invention relates to a device for sealing a caisson comprising a bottom, two upright side walls and a back wall, and intended for carrying out works to a sheet pile wall below the water line, characterized in that it comprises the combination of an inflatable continuous air chamber (8); a series of deformable sealing elements (9); a core (10) which can be displaced between each of said sealing elements (9) and the air chamber (8) and guiding plates (11) and means for allowing the lateral displacement of said sealing elements with respect to the caisson.

Abstract: This invention concerns equipment designed for carrying out work under dry conditions on an underwater structure in particular on a sheet pile planking wall with grooves at more or less regular intervals comprising a caisson brought through two vertical walls and a floor in contact with a sheet pile planking wall and means to keep the caisson pressed against the sheet pile planking wall comprising the floor of the caisson being fitted with horizontally adjustable sealing sheets that slide in the grooves of the sheet pile planking wall.