FIELD: construction engineering. SUBSTANCE: this is intended for making bore-holes in ground for laying underground service lines without digging trenches. Used for this purpose is pneumatic punch giving high productivity, accuracy and sufficient length of thus made holes. Device is made up of pneumatic punch and head-piece. Deviation of head-piece in required direction is performed directly in hole by way of short-term reversing of pneumatic punch travel from forward to backward and then from backward to forward. This action is performed by means of ratchet mechanism. At turning, changing is point of applying impact pulse which is transmitted by pneumatic punch to head-piece. EFFECT: high efficiency. 2 cl, 4 dwg
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