A locking device of a latticed reinforce member used to the concrete structure includes a spacer and a rivet-type anchor pin, with a groove for inserting reinforcing composite is lengthily formed at the thickness portion of the spacer and a hole for inserting reinforcing composite formed at the center of the spacer, while the anchor pin has a ground plate head formed at its upper portion and the hitting (tension) rod projected at its center and its expansion part at its bottom portion.
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