Apparatus for erecting a foundation element in the ground
AssigneeBauer Spezialtiebau GmbH
InventorChristoph Alois Harsch
Life of this patent
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Abstract
An apparatus for erecting a foundation element in a ground surface including a drilling device, a pumping device, a pressure transducer and a control unit. The drilling device includes a hollow core tube and an auger bit adapted to drill a hole in the ground surface while the pumping device is adapted to pump a solidifying suspension material under pressure through the hollow core tube and into the hole in the ground surface. In addition, the pressure transducer is mounted on the core tube and is adapted to provide a pressure signal indicative of a pressure of the solidifying suspension material in the core tube while the control unit is adapted to control the pressure of the solidifying suspension material.
Claims19
Apparatus for erecting a foundation element in a ground surface comprising:
- a drilling device having a hollow core tube and an auger bit for drilling a hole in said ground surface, said hollow core tube defining a substantially central suspension passage sized to allow flow of a solidifying suspension material therethrough;
- a pumping device for pumping said solidifying suspension material under pressure through said suspension passage of said hollow core tube into the hole in said ground surface;
- a pressure transducer mounted on said hollow core tube for providing a pressure signal indicative of a pressure of said solidifying suspension material, said pressure transducer having a measuring chamber formed by an elastic wall which at least partially defines said suspension passage of said hollow core tube;
- and
- a control unit for controlling said pressure of said solidifying suspension material;
- wherein increasing pressure in said suspension passage causes said elastic wall to be displaced radially outwardly from said suspension passage thereby increasing pressure in said measuring chamber.
Apparatus for erecting a foundation element in a ground surface comprising:
- a drilling device having a hollow core tube and an auger bit for drilling a hole in said ground surface, said hollow core tube defining a substantially central suspension passage sized to allow flow of a solidifying suspension material therethrough, said auger bit defining an increased diameter chamber in a lower area of said core tube and said suspension passage being open to said increased diameter chamber area from which said solidifying suspension material flows into the hole in the ground surface upon extraction of said drilling device;
- a pumping device for pumping said solidifying suspension material under pressure through said suspension passage of said hollow core tube into the hole in said ground surface;
- a pressure transducer mounted on said hollow core tube for providing a pressure signal indicative of a pressure of said solidifying suspension material, said pressure transducer having a measuring chamber formed by an elastic wall which at least partially defines said increased diameter chamber;
- and
- a control unit for controlling said pressure of said solidifying suspension material;
- wherein increasing pressure in said increased diameter chamber causes said elastic wall to be displaced axially upwardly from said increased diameter chamber thereby increasing pressure in said measuring chamber.
Dependencies are inferred from the claim text.