A pile hammer includes a cylinder, a piston displaceably guided in the cylinder, and a striker displaceably guided in the cylinder. The striker is disposed underneath the piston in the operating position of the pile hammer. A combustion chamber is delimited axially by a face surface of the striker that lies in the interior of the cylinder and by a face surface of the piston. Using at least one fuel feed device a predetermined amount of fuel can be introduced into the combustion chamber during each working cycle. A primary fuel feed device is provided, which includes a primary fuel nozzle connected with a primary fuel tank having a fuel with great anti-knock properties. The primary fuel nozzle is structured as a high-pressure injection nozzle. An ignition oil feed device is also provided, which includes an ignition oil nozzle connected with an ignition oil tank having an ignition oil. The ignition oil nozzle is structured as a low-pressure injection nozzle. A method operates such a pile hammer.

A pile hammer includes a cylinder, a piston displaceably guided in the cylinder, and a striker displaceably guided in the cylinder. The striker is disposed underneath the piston in the operating position of the pile hammer. A combustion chamber is delimited axially by a face surface of the striker that lies in the interior of the cylinder and by a face surface of the piston. Using at least one fuel feed device a predetermined amount of fuel can be introduced into the combustion chamber during each working cycle. A primary fuel feed device is provided, which includes a primary fuel nozzle connected with a primary fuel tank having a fuel with great anti-knock properties. The primary fuel nozzle is structured as a high-pressure injection nozzle. An ignition oil feed device is also provided, which includes an ignition oil nozzle connected with an ignition oil tank having an ignition oil. The ignition oil nozzle is structured as a low-pressure injection nozzle. A method operates such a pile hammer.

The invention relates to a construction device and to a method for operating this construction device, comprising a carrier device, an approximately vertical mast, which is mounted on the carrier device, a movement element, which is vertically movable along a linear guide on the mast, and at least one GPS receiving unit, which is arranged in the region of the mast. According to the invention, it is provided that the at least one GPS receiving unit is attached to the movement element and that the at least one GPS receiving unit can be moved between an upper, first measuring position and a lower, second measuring position by means of the movement element.

A pile driver configured to drive a pile into an underwater bed includes a floatable body with a pile guide configured to guide the pile in a downward direction, and an actuator that is fixed to the floatable body and that is configured to drive the pile from the floatable body into the underwater bed. A method of driving a pile into an underwater bed includes the steps of: positioning a floatable body; arranging a pile in a pile guide configured to guide said pile in a downward direction; and driving the pile from the floatable body into the underwater bed by an actuator that is fixed to the floatable body.

A pile driver configured to drive a pile into an underwater bed includes a floatable body with a pile guide configured to guide the pile in a downward direction, and an actuator that is fixed to the floatable body and that is configured to drive the pile from the floatable body into the underwater bed. A method of driving a pile into an underwater bed includes the steps of: positioning a floatable body; arranging a pile in a pile guide configured to guide said pile in a downward direction; and driving the pile from the floatable body into the underwater bed by an actuator that is fixed to the floatable body.

A method, system and apparatus for plasma blasting comprises a borehole in soil, a blast probe comprising a high voltage electrode and a ground electrode separated by a dielectric separator, wherein the high voltage electrode and the dielectric separator constitute an adjustable probe tip, and an adjustment unit coupled to the adjustable probe tip, wherein the adjustment unit is configured to selectively extend or retract the adjustable probe tip relative to the ground electrode and a blasting media, wherein at least a portion of the high voltage electrode and the ground electrode are submerged in the blast media. The blasting media comprises wet concrete. The adjustable tip permits fine-tuning of the blast. The blast is used to force the wet concrete into a customized shape within the borehole.

A method, system and apparatus for plasma blasting comprises a borehole in soil, a blast probe comprising a high voltage electrode and a ground electrode separated by a dielectric separator, wherein the high voltage electrode and the dielectric separator constitute an adjustable probe tip, and an adjustment unit coupled to the adjustable probe tip, wherein the adjustment unit is configured to selectively extend or retract the adjustable probe tip relative to the ground electrode and a blasting media, wherein at least a portion of the high voltage electrode and the ground electrode are submerged in the blast media. The blasting media comprises wet concrete. The adjustable tip permits fine-tuning of the blast. The blast is used to force the wet concrete into a customized shape within the borehole.

A hydraulic impact hammer for striking a pile has a main housing, a ram supported, a coupler rod, a conversion housing, a hydraulic actuator, and a ram connector. The hydraulic actuator defines an actuator rod, a lifting head, and a lift connector. The lifting head defines an upper wall and a lower wall. The lift connector attaches the actuator rod to the upper wall of the lifting head. The ram connector attaches the coupler rod to the lower wall of the lifting head. Operation of the hydraulic actuator raises and lowers the ram to strike the pile.

A pile driver configured to drive a pile into an underwater bed includes a floatable body with a pile guide configured to guide the pile in a downward direction, and an actuator that is fixed to the floatable body and that is configured to drive the pile from the floatable body into the underwater bed. A method of driving a pile into an underwater bed includes the steps of: positioning a floatable body; arranging a pile in a pile guide configured to guide said pile in a downward direction; and driving the pile from the floatable body into the underwater bed by an actuator that is fixed to the floatable body.

A guide system for allowing a diesel hammer to be supported by a plurality of support systems comprises a primary channel system and a pair of first and second channel adapter assemblies. The primary channel system rigidly connected to the diesel hammer to define a pair of primary channels and a primary spacing distance. Each first channel adapter assembly defines a first secondary channel. The guide system operates in a first configuration and a second configuration. In the second configuration, each of the first channel adapter assemblies is detachably attached to the primary channel system such that the first channel adapter assemblies define a first secondary spacing distance between the first secondary channels, the first secondary spacing distance is different from the primary spacing distance, and portions of a second support system of the plurality of support systems are received within the first secondary channels.