FIELD: civil engineering. SUBSTANCE: device comprises conical end piece, flexible link and mechanism for driving end piece into ground. End piece has symmetrical outer ribs on which revolving blades are secured. A through cavity is formed along the end piece axis. The driving-in mechanism is made of conical rolls which are slipped on eccentric shaft and, when assembled, form a cone. The larger cone is accommodated inside the endpoint. The shaft is connected to drive rod. The link is of the two-branch type and is secured to blades. EFFECT: improved design. 2 cl, 6 dwg
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