A device and a method for generating percussive pulses or vibrations for a construction machine, in which a piston is reversibly reciprocated in a working space in a housing between a first reversal point and a second reversal point, wherein, for the purpose of generating the percussive pulses or vibrations, the piston is set into a reversible movement by a pressure fluid and the pressure fluid is led into and out of the working space in the region of the first reversal point and the second reversal point. The position of the piston is detected by way of a sensor, in that depending on the detected position of the piston a control unit controls at least one controllable valve, through which pressure fluid is led into and/or out of the working space, wherein by the control unit the movement of the piston is controlled.

The present invention relates to a method of power management during pile foundation having a base machine for excavating a borehole and an attachment installed at the base machine for a simultaneous introduction of a casing into the ground, wherein the energy supply for the attachment is at least partially provided by the base machine and a control of the base machine dynamically regulates the energy flow from the base machine to the attachment.

The present invention relates to a method of power management during pile foundation having a base machine for excavating a borehole and an attachment installed at the base machine for a simultaneous introduction of a casing into the ground, wherein the energy supply for the attachment is at least partially provided by the base machine and a control of the base machine dynamically regulates the energy flow from the base machine to the attachment.

A one-piece, Z shaped steel plate foundation comprising a main plate body extending the longitudinal length of the foundation from a top to a bottom of the foundation, a single rear flange extending perpendicular to the main plate body in a first direction at a rear edge of the main plate body, wherein the single rear flange does not extend past the main plate body in the direction opposite the first direction, a single front flange extending perpendicular to the main plate body in the direction opposite the first direction at a front edge of the main plate body, wherein the single front flange does not extend past the main plate body in the first direction; and a plurality of mounting holes at the top of the one-piece metal plate foundation configured for attachment to the structure to be supported.

A one-piece, Z shaped steel plate foundation comprising a main plate body extending the longitudinal length of the foundation from a top to a bottom of the foundation, a single rear flange extending perpendicular to the main plate body in a first direction at a rear edge of the main plate body, wherein the single rear flange does not extend past the main plate body in the direction opposite the first direction, a single front flange extending perpendicular to the main plate body in the direction opposite the first direction at a front edge of the main plate body, wherein the single front flange does not extend past the main plate body in the first direction; and a plurality of mounting holes at the top of the one-piece metal plate foundation configured for attachment to the structure to be supported.

Certain exemplary embodiments can provide a system comprising a frame, which comprises an outer mast and an inner mast. The outer mast slides along the inner mast. A motor is coupled to the frame. A hydraulic system is coupled to the motor. A jackhammer head is coupled to the outer mast, which outer mast allows the jackhammer head to float up and down on the inner mast as the jackhammer head reciprocates. Thereby vibrations from jackhammer motion substantially do not get transferred to the frame.

A heat transfer pipe embedded in a prefabricated pipe pile including a plurality of prefabricated pipe piles, a heat transfer pipe component and a pump assembly; the prefabricated pipe pile sealed by closing the bottom thereof and sides of which are provided with inclined holes; a locking pin provided at an inner wall of the pipe pile; a steel plate provided on the locking pin, and a steel bar structure bound on the steel plate; the heat transfer pipe component comprises a horizontal heat transfer pipe communicated with a vertical heat transfer pipe with both pipes communicated with the pump assembly, the horizontal pipe embedded and fixed via the steel bar structure, the vertical heat transfer pipe passes through the inclined holes and fixed in the pipe pile via a steel bar bracket.

A heat transfer pipe embedded in a prefabricated pipe pile including a plurality of prefabricated pipe piles, a heat transfer pipe component and a pump assembly; the prefabricated pipe pile sealed by closing the bottom thereof and sides of which are provided with inclined holes; a locking pin provided at an inner wall of the pipe pile; a steel plate provided on the locking pin, and a steel bar structure bound on the steel plate; the heat transfer pipe component comprises a horizontal heat transfer pipe communicated with a vertical heat transfer pipe with both pipes communicated with the pump assembly, the horizontal pipe embedded and fixed via the steel bar structure, the vertical heat transfer pipe passes through the inclined holes and fixed in the pipe pile via a steel bar bracket.

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.