Abstract: The present invention relates to a method and a device for environmentally friendly ramming under water. To reduce the noise input under water, the machine and the material that is to be rammed are surrounded by a fixed flooded sleeve. The sleeve advantageously has a sandwich-like structure.

Abstract: The present invention relates to a method and a device for environmentally friendly ramming under water. To reduce the noise input under water, the machine and the material that is to be rammed are surrounded by a fixed flooded sleeve. The sleeve advantageously has a sandwich-like structure.

Abstract: The present invention relates to a method and a device for environmentally friendly ramming under water. To reduce the noise input under water, the machine and the material that is to be rammed are surrounded by a fixed flooded sleeve. The sleeve advantageously has a sandwich-like structure.

Abstract: With an arrangement for determining the penetration depth (10) when putting in place supporting elements (2) into a water bed (5), according to the invention, there is provided a pressure sensor (7) for measuring the water pressure which is fastenable to the supporting element (2) or to a device (1) connected to the supporting element (2). The readings (11) supplied by the pressure sensor (7) are transmitted via a signal lead (15) to an evaluation unit (16) which determines the penetration depth (10) of the supporting element (2) from the reading differences which occur during the sinking of the pressure sensor (7) on penetration of the supporting element (2) into the water bed (5).

Abstract: A pile driving device for driving in piles, with an axially-guided impact body movable in a hammer housing, an impact hood and a pile sleeve. So that the pile driving device can be transported by land without requiring surveys and preparation, the pile sleeve comprises two or more parts, with the pile sleeve being divided into radial or circular concentric partitions.

Abstract: The invention relates to a pile driving device for driving in piles, with an axially-guided impact body movable in a hammer housing, an impact hood and a pile sleeve. So that the pile driving device can be transported by land without requiring surveys and preparation, the pile sleeve comprise two or more parts, with the pile sleeve being divided into radial or circular concentric partitions.

Abstract: In a method for determining depth when putting in place supporting elements into a waterbed, a pressure sensor fastenable to a supporting element or a device connected to the supporting element measures a water pressure, the reading is supplied by the pressure sensor and transmitted via signal lead to an evaluating unit which determines the penetration depth of the supporting element from the reading differences which occur during the sinking of the pressure sensor on penetration of the supporting element into the waterbed.

Abstract: The yam device has a plurality of guides and a striking mass which is movable so as to be displaceable thereat by means of a hydraulic cylinder, wherein the hydraulic cylinder is arranged with its longitudinal axis outside the path of the center of gravity of the striking mass. The striking mass can comprise a first elastomeric and/or plastic component and a second heavy metal component. Three guides which can be parallel to the movement path of the center of gravity are provided for the guidance of the striking mass, the striking mass is preferably constructed so as to be guided at its respective end areas. The ram device and the striking mass preferably have a symmetry plane defined by the axis of the hydraulic cylinder and the movement path of the center of gravity and the guides located out of the symmetry plane are arranged in two planes which are at an angle of 120.degree. or less relative to each other and symmetrically disposed on each side of the symmetry axis.

Abstract: For driving of ramming parts under water, a first ramming device is suspended on the supporting element and a second ramming device is suspended on a further supporting element, a submergible electrohydraulic drive unit is located laterally near or under one of the ramming device and connected with both ramming devices by hose conduits, the ramming devices with the drive unit are lowered so that at least one ramming device is placed on one ramming part and after driving it in over a predetermined path it is transferred to another ramming part, while the other ramming device drives further the first ramming part or a further ramming part, and both ramming devices are driven one after the other or simultaneously with one another by the same drive unit.

Abstract: For separating tubular foundation piles under water, a working device with a downwardly extending supporting shaft and at least one separating tool is placed on an upper edge of the pile so that the separating tool is inserted into the supporting shaft, and then the working device is clamped on the pile and the separating tool is rotated about a longitudinal axis of the supporting shaft to penetrate through the wall of the pile.

Abstract: A submergible electrohydraulic drive unit is a multi-purpose device for driving different underwater ramming and working devices and has a housing with a throughgoing central receiving space for a ramming pile or a respective ramming or working device, ring-shaped upper and lower supporting plates, an outer wall, an inner wall which forms the receiving space, and a plurality of pump units arranged between the inner wall and the outer wall and each having a hydraulic pump and an associated electric motor and individually or jointly limitedly movably spring-biased relative to the housing, one supporting plate having means for exchangeably mounting said device adjusted relative to said receiving space.

Abstract: For driving of ramming parts under water, a first ramming device is suspended on the supporting element and a second ramming device is suspended on a further supporting element, a submergible electrohydraulic drive unit is located laterally near or under one of the ramming device and connected with both ramming devices by hose conduits, the ramming devices with the drive unit are lowered so that at least one ramming device is placed on one ramming part and after driving it in over a predetermined path it is transferred to another ramming part, while the other ramming device drives further the first ramming part or a further ramming part, and both ramming devices are driven one after the other or simultaneously with one another by the same drive unit.

Abstract: A compensating device for avoiding swell-generated relative movements between a load suspended on a crane and a load placing surface, or between a crane hook and a load to be carried thereby, the compensating device comprises a hydraulic cylinder-piston unit including a cylinder with an inner space, a piston sealingly displaceable in the cylinder and subdividing the inner space into a load supporting chamber which is to be filled in operation with hydraulic liquid and a second chamber, a piston rod connected with the piston, and a hydraulic accumulator connected with the supporting chamber and accommodating a pretensioned gas cushion, the second chamber being filled in operation with hydraulic liquid, the hydraulic accumulator including at least one hydraulic accumulating element which is connected with the second chamber and accommodating a gas cushion with a low pressure, the piston rod extending through both the load supporting chamber and the second chamber and extending outwardly beyond end surfaces of t