Hamm Ag

Plasser & Theurer Export Von Bahnbaumaschinen Gmbh

Johannes Pistrol

Fritz Kopf

Werner Völkel

Sebastian Villwock

Florian Auer

Bernhard Antony

Mario Hager

Dietmar Adam

Tobias Fehr

Olja Barbir

A method for providing information related to the compaction state of soil when performing a compaction operation with a soil compactor includes: a) detecting a vertical acceleration and a horizontal acceleration of a vibratory roller when moving a soil compactor over soil to be compacted, b) determining a measurement relationship between a ground contact force and a deflection of the vibratory roller for one vibration cycle using the vertical acceleration and horizontal acceleration detected in operation a), c) determining a simulation relationship between the ground contact force and the deflection for one vibration cycle using a ground model taking into account at least one simulation parameter, d) comparing the simulation relationship to the measurement relationship, and e) determining that a default value of the at least one simulation parameter taken into account in the ground model substantially represents a corresponding soil parameter of the soil to be compacted when the simulation relationship substantially corresponds to the measurement relationship.

Method for providing information related to the compaction state of a soil when performing a compaction operation with a soil compactor

A method for compaction of a track ballast bed uses a tamping unit including two oppositely positioned tamping tools which are actuated with vibrations and are lowered into the track ballast bed during a tamping operation and moved towards one another with a squeezing motion. A progression of a force acting upon the tamping tool over a path covered by the tamping tool is recorded during a vibration cycle by sensors disposed at the tamping unit for at least one tamping tool. At least one characteristic value is derived therefrom and used to carry out an evaluation of the tamping operation and/or of a quality of the track ballast bed. The tamping unit is thus used as a measuring apparatus during operative use. A device for performing the method is also provided.

Method and device for compaction of a track ballast bed

A method for determining the compaction state of a subgrade to be compacted using a roller compactor comprising at least one compactor drum having an oscillation-inducing arrangement and rotatable about a drum axis of rotation comprising the following steps: during at least one period of oscillating movement of the compactor drum, repeatedly determining the acceleration of the compactor drum in an first direction, representing a first acceleration value; in association with each first acceleration value, determining an acceleration of the compactor drum in a second direction representing a second acceleration value in order to provide acceleration value pairs, each consisting of a first acceleration value and a second associated acceleration value; and for at least one oscillation period, defining a compaction state value representing the compaction state of the subgrade based upon the period of oscillation determined for said acceleration value pairs.

Method for determining the compaction state of substrate

A method is provided for the correction of a measured value curve by eliminating periodically occurring measurement artifacts. The method includes steps of

Method for the correction of a measured value curve by eliminating periodically occurring measurement artifacts, in particular in a soil compactor

A method to determine a slip state of the compactor roller of a soil compactor caused by an oscillation motion of a compactor roller, comprising the steps:

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Mödling, Austria

Johannes Pistrol