Patent ID: 6238142
Filing Date: 2001-05-29
Classification: E02D

Abstract:
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; anda 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.