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.

The present invention relates to an attachment for drilling and/or foundation work, in particular a casing oscillator or casing rotator, comprising a receiving apparatus for clamping at least one pipe and a drive for generating a rotational movement of the clamped pipe, wherein the attachment comprises at least one integral control unit for an independent carrying out of control functions of the attachment.

The present invention relates to an attachment for drilling and/or foundation work, in particular a casing oscillator or casing rotator, comprising a receiving apparatus for clamping at least one pipe and a drive for generating a rotational movement of the clamped pipe, wherein the attachment comprises at least one integral control unit for an independent carrying out of control functions of the attachment.

The invention relates to a vibrating ram arrangement comprising a hydraulic assembly, a vibrator which is connected to the hydraulic assembly via hydraulic tubes, and a controller which is paired with the hydraulic assembly. The hydraulic assembly has a hydraulic pump which is driven by an internal combustion engine, and the vibrator has imbalances and an adjustable hydraulic engine for driving the imbalances. A hydraulic fluid is conducted through the hydraulic assembly, the hydraulic tubes, and the hydraulic engine in a circuit. A frequency sensor for determining the frequency of the vibrator is connected to the controller, and the controller is designed to control a volumetric flow rate conducted through the circuit dependent on the signal of the frequency sensor. According to the invention, the vibrator has a device, which is independent of the controller, for automatically adjusting a displacement volume of the hydraulic engine dependent on a pressure within the circuit.

The invention relates to a vibrating ram arrangement comprising a hydraulic assembly, a vibrator which is connected to the hydraulic assembly via hydraulic tubes, and a controller which is paired with the hydraulic assembly. The hydraulic assembly has a hydraulic pump which is driven by an internal combustion engine, and the vibrator has imbalances and an adjustable hydraulic engine for driving the imbalances. A hydraulic fluid is conducted through the hydraulic assembly, the hydraulic tubes, and the hydraulic engine in a circuit. A frequency sensor for determining the frequency of the vibrator is connected to the controller, and the controller is designed to control a volumetric flow rate conducted through the circuit dependent on the signal of the frequency sensor. According to the invention, the vibrator has a device, which is independent of the controller, for automatically adjusting a displacement volume of the hydraulic engine dependent on a pressure within the circuit.

A method for detecting and controlling compaction when compacting a soil by a depth vibrator which has a rotationally drivable imbalance (3) and at least one sensor (6, 12, 13, 14, 19), comprising the steps of: inserting the depth vibrator (2) into the soil (17) up to a desired final depth (Tm); compaction of the soil (17) during which the forward angle () of the imbalance (3) as well as the oscillation amplitude (A) of the depth vibrator (2) are determined; detection of a soil stiffness profile from soil stiffness values (k) determined over time (t); determination of a first soil stiffness value (k1) and a second soil stiffness value (k2) from the soil stiffness profile (k), for which it applies that a rate of increase (k2) of the second soil stiffness value (k2) exceeds a rate of increase (k1) of the first soil stiffness value (k1) by a defined factor; calculation of a transition soil stiffness value (k12) which is between the first soil stiffness value (k1) and the second soil stiffness value (k2); and storing the transition soil stiffness value (k12) detected in the respective compaction step to the associated depth (T).

A vibrator for generating vibrations. An exciter cell having rotationally drivable unbalanced masses that are rotatably supported in an exciter cell housing and having an adjustment unit for adjusting the phase position of the unbalanced masses relative to one another. The adjustment unit is configured as a planetary gearing that has at least two input trains to which the unbalanced masses of the exciter cell are coupled that are adjustable in phase relative to one another and that has an adjustment input train for changing the phase position of the output trains of the planetary gearing.

A vibrator for generating vibrations. An exciter cell having rotationally drivable unbalanced masses that are rotatably supported in an exciter cell housing and having an adjustment unit for adjusting the phase position of the unbalanced masses relative to one another. The adjustment unit is configured as a planetary gearing that has at least two input trains to which the unbalanced masses of the exciter cell are coupled that are adjustable in phase relative to one another and that has an adjustment input train for changing the phase position of the output trains of the planetary gearing.

An unbalanced sub-assembly includes a turbine and a shaft coupled to the turbine at a first end of the shaft. The unbalanced sub-assembly is capable of rotating and imparting a vibration to the casing in response to a fluid being passed through the casing. A rupture disc is positioned on one end of the unbalanced sub assembly. The rupture disc is configured to rupture above a specified differential pressure threshold caused by fluid flowing through the vibration assembly. The rupture disc is capable of allowing the fluid to bypass the unbalanced sub assembly when the rupture disc is in a ruptured state. The rupture disc directs fluid through the unbalanced sub assembly when the rupture disc is in an un-ruptured state.