Process and apparatus for dynamic soil packing

Details Process and apparatus for dynamic soil packing Process and apparatus for dynamic soil packing

1997-04-29

1998-08-25

Lisehora, James

Road structure, process, or apparatus

Apparatus

Means to agitate material

404122, E01C 1928

Patent

active

057976996

ABSTRACT:
Dynamic soil packing can be achieved by a procedure and device whereby the vibratory motion of the roller or one of the parts attached to it is determined, and whereby the vertical component of the vibratory force is diminished in the event of a disturbance (e.g., bouncing) of the basic roller vibration. The packing device is one having at least two exciter shafts synchronously rotating in opposite directions and arranged parallel to or in alignment with the roller axis for generating a vibrating motion, the exciter shafts being adjustable in their position and/or phase relationship so that the resulting centrifugal force electively exerts horizontal shearing forces and/or vertical compressive forces in the soil. A motion sensor determines the vibratory motion, such as amplitude, acceleration or periodicity thereof, and in connection with a control loop and adjustable pivot bearing adjusts the horizontal and vertical components of the motion to eliminate the disturbance.

REFERENCES:
patent: 4546425 (1985-10-01), Breitholtz

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