A lead for installing a pile into a seabed floor comprising: an elongated body extending longitudinally along a first axis in a first direction from a top end to a bottom end and configured to receive a pile oriented in the first direction; and a lead indexing foot attached to the bottom end of the elongated body and laterally offset with regard to the first axis.

A roof mounting bracket is disclosed which creates a deformation in a roof panel seam using opposing set points. In a preferred embodiment, a generally U-shaped bracket includes two or more threaded fasteners in a first arm of the bracket and one or more opposing threaded fasteners in the second arm. Void in bracket is placed over the panel seam, with the first arm on a first side of the seam and the second arm on the opposite side of the seam. First screws inserted into the fasteners in first arm pass through the first arm and the first screw heads contact the first side of the seam, slightly engaging the seam and creating first deformations in the seam as the set screws are tightened. Second screws inserted into the fasteners in the second arm pass through the second arm and the second screw heads contact the second side of the seam in the spaces between the first deformations on the opposite side of the seam, engaging the seam and creating second deformations in the seam as the second screws are tightened. The opposing contact points create a wave deformation in the seam, securing the bracket to the seam. The opposing set points of the present invention allow secure attachment of the bracket to the seam without having to dimple or dent the panel seam using a single set screw, requiring less force by the user. Bracket can include varying numbers of opposing fasteners in first and second arms for varying numbers of opposing set points. In an alternative embodiment, bracket can further comprise divots into which first deformations are recesses to create a deeper wave the seam for stronger attachment to seam.

The object of the invention is a pile driving rig lower cushion, which is a piece made of a material whose modulus of elasticity is 500-3,500 MPa and which comprises two end surfaces and at least one side surface between them, and in which lower cushion the first end surface is placeable against the drive cap housing of the pile driving rig and the end of the pile to be fitted into the drive cap housing of the pile driving rig is placeable against the second end surface. The lower cushion according to the invention has at least one of other sections of the lower cushion, a flexible section that is more flexible at least in one direction for fitting the lower cushion into the drive cap housing, in which there are at least two opposite interior surfaces, the distance between which is smaller than the distance between two opposite outer surfaces of the lower cushion that come against these interior surfaces of the drive cap housing at the flexible section in its direction of deflection, whereby the lower cushion is fittable between these interior surfaces located in the drive cap housing by compressing the lower cushion at said at least one flexible section, such that it fits between said two opposite interior surfaces of the drive cap housing and remains in its place between these interior surfaces, through the effect of the compressive force P caused by said at least one flexible section and the friction forces resulting therefrom between the surfaces that are compressed against one another.

The object of the invention is a pile driving rig lower cushion, which is a piece made of a material whose modulus of elasticity is 500-3,500 MPa and which comprises two end surfaces and at least one side surface between them, and in which lower cushion the first end surface is placeable against the drive cap housing of the pile driving rig and the end of the pile to be fitted into the drive cap housing of the pile driving rig is placeable against the second end surface. The lower cushion according to the invention has at least one of other sections of the lower cushion, a flexible section that is more flexible at least in one direction for fitting the lower cushion into the drive cap housing, in which there are at least two opposite interior surfaces, the distance between which is smaller than the distance between two opposite outer surfaces of the lower cushion that come against these interior surfaces of the drive cap housing at the flexible section in its direction of deflection, whereby the lower cushion is fittable between these interior surfaces located in the drive cap housing by compressing the lower cushion at said at least one flexible section, such that it fits between said two opposite interior surfaces of the drive cap housing and remains in its place between these interior surfaces, through the effect of the compressive force P caused by said at least one flexible section and the friction forces resulting therefrom between the surfaces that are compressed against one another.

A pile driving adapter includes an upper attachment portion for selectively attaching the adapter to a drill head and a lower housing portion including at least a first outer wall. The pile driving adapter further includes at least one actuator including a first portion slidably mounted to the lower housing portion and a second portion configured to expand from the first portion in a direction perpendicular to the first outer wall. The first portion may be slidably mounted to the lower housing portion via a sliding mount, and the lower housing portion may include at least one elongate slot for receiving at least a portion of the sliding mount. The pile driving adapter advantageously couples the drill head and the member to be driven so as to reliably transfer sonic energy.

A pile driving adapter includes an upper attachment portion for selectively attaching the adapter to a drill head and a lower housing portion including at least a first outer wall. The pile driving adapter further includes at least one actuator including a first portion slidably mounted to the lower housing portion and a second portion configured to expand from the first portion in a direction perpendicular to the first outer wall. The first portion may be slidably mounted to the lower housing portion via a sliding mount, and the lower housing portion may include at least one elongate slot for receiving at least a portion of the sliding mount. The pile driving adapter advantageously couples the drill head and the member to be driven so as to reliably transfer sonic energy.

The invention relates to an arrangement for supporting a thin-walled steel pile (5; 17; 26; 35) in an impact pile driving device, the arrangement comprising a supporting surface (4; 14; 23; 31), to which the steel pile (5; 17; 26; 35) can be supported, and in which arrangement the supporting surface (4; 14; 23; 31) is provided with one or more absorbing surfaces (6; 16; 25; 33) to be placed against the end of the wall (8; 18, 26; 36) of the steel pile (5; 17; 26; 35). In the arrangement according to the invention, the absorbing surface (6; 16; 25; 33) is configured to shape the end of the wall (8; 18; 27; 36) of the steel pile (5; 17, 26; 35) coming against the absorbing surface (6; 16; 25; 33), by the effect of the impact driving of the steel pile (5; 17; 26; 35), so that at least the part of the wall (8; 18; 27; 36) at the absorbing surface (6; 16; 25; 33) of the wall (8; 18; 27; 36) is shaped against the absorbing surface (6; 16; 25; 33), wherein the movement of the wall (8; 18; 27; 36) in the direction of a plane transverse to the direction of impact driving of the steel pile is prevented, at least at the head of the steel pile (5; 17; 26; 35). Also, the absorbing surface (6; 16; 25; 33) in the supporting surface (4, 14; 23; 31) can be configured to be shaped by the effect of the impact driving of the steel pile (5; 17, 26, 35) so that the absorbing surface (6; 16; 25; 33) is shaped against the part of the wall (8; 18, 27; 36) of the steel pile (5; 17; 26; 35) at the absorbing surface (6; 16; 25; 33), whereby the movement of the wall (8; 18; 27; 36) at the head of the steel pile (5; 17; 26; 35) is prevented. The invention also relates to a method for arranging the support of a steel pile (5; 17; 26; 35) in an impact pile driving device.

The invention relates to an arrangement for supporting a thin-walled steel pile (5; 17; 26; 35) in an impact pile driving device, the arrangement comprising a supporting surface (4; 14; 23; 31), to which the steel pile (5; 17; 26; 35) can be supported, and in which arrangement the supporting surface (4; 14; 23; 31) is provided with one or more absorbing surfaces (6; 16; 25; 33) to be placed against the end of the wall (8; 18, 26; 36) of the steel pile (5; 17; 26; 35). In the arrangement according to the invention, the absorbing surface (6; 16; 25; 33) is configured to shape the end of the wall (8; 18; 27; 36) of the steel pile (5; 17, 26; 35) coming against the absorbing surface (6; 16; 25; 33), by the effect of the impact driving of the steel pile (5; 17; 26; 35), so that at least the part of the wall (8; 18; 27; 36) at the absorbing surface (6; 16; 25; 33) of the wall (8; 18; 27; 36) is shaped against the absorbing surface (6; 16; 25; 33), wherein the movement of the wall (8; 18; 27; 36) in the direction of a plane transverse to the direction of impact driving of the steel pile is prevented, at least at the head of the steel pile (5; 17; 26; 35). Also, the absorbing surface (6; 16; 25; 33) in the supporting surface (4, 14; 23; 31) can be configured to be shaped by the effect of the impact driving of the steel pile (5; 17, 26, 35) so that the absorbing surface (6; 16; 25; 33) is shaped against the part of the wall (8; 18, 27; 36) of the steel pile (5; 17; 26; 35) at the absorbing surface (6; 16; 25; 33), whereby the movement of the wall (8; 18; 27; 36) at the head of the steel pile (5; 17; 26; 35) is prevented. The invention also relates to a method for arranging the support of a steel pile (5; 17; 26; 35) in an impact pile driving device.

A system and method detect at least one mechanical locking position of a drill string in a soil drilling machine. According the system and method, there are: a sensor apparatus which is configured to detect first data indicating the position assumed by the top of the drill string and second data indicating the position assumed by the bottom of the drill string. A control unit calculates the estimated length of the drill string based on the data and to compare the estimated length with a reference length value. A pair of kelly rods is in a mechanical locking position; and a signaling apparatus is configured to signal when the estimated length corresponds to a reference length value.

A pile driving adapter includes an upper attachment portion for selectively attaching the adapter to a drill head and a lower housing portion including at least a first outer wall. The pile driving adapter further includes at least one actuator including a first portion slidably mounted to the lower housing portion and a second portion configured to expand from the first portion in a direction perpendicular to the first outer wall. The first portion may be slidably mounted to the lower housing portion via a sliding mount, and the lower housing portion may include at least one elongate slot for receiving at least a portion of the sliding mount. The pile driving adapter advantageously couples the drill head and the member to be driven so as to reliably transfer sonic energy.