FIELD: mining.
SUBSTANCE: bored auger pile installation device comprises a case with upper part made in a form of hollow faceted pin with a hole for a ball plug, and a rock-breaking tool with a skirt. Middle and bottom parts of the case are made in a form of solid cylinders with variable cross-section, where diameter of middle part is more than diameter of bottom part. Middle cylindrical part features an orifice system, a cavity for concrete injection and transverse slot, where a rotating splitter knife is installed on a vertical axis in the vertical case hole. The knife is switched into working position by a moving spring pusher with variable cross-section, located in a horizontal cavity formed by two orifices of different diameter, stopped by a plug from the outer side. Lower cylindrical part of the case has a through lengthwise slot with a stop.
EFFECT: higher capacity of bored auger pile installation in highly and medium stable grounds, and lower cost of drilling work.
5 cl, 4 dwg
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