FIELD: construction industry, drilling of holes for erection of columnar or columnar-continuous footing. SUBSTANCE: given construction drill includes shaft, crossbeam with handles on one side and ground collector coming in the form of turn of screw with flanging on the other side. Throwing plough fitted with release and retraction system with stopping mechanism incorporating cord and tie-rod which free end is anchored on crossbeam of drill is attached in addition under ground collector. Cord is linked to tie-rod provided with saw-toothed cut. Rest engaging cut is put on shaft. Stopping mechanism includes shackle hinged to tie-rod and embracing shaft of drill with guaranteed clearance. In this case joint of tie-rod and shackle is outside of shaft, on side of plough. Cord is linked to shackle. EFFECT: drilling in hard ground, improved handling of drill. 1 cl, 4 dwg
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