The principle of reaming anchor bolt:
The principle of the reaming anchor bolt is to expand the bottom of the existing concrete hole, and when the expansion piece of the anchor bolt head expands, a self-locking mechanism is formed. It is generally understood that the head of the anchor bolt has space for expansion in the concrete hole, there will be no expansion and compression stress, and there will be no slippage when subjected to external allowable loads.
Since the reaming type anchors rely on the extrusion friction force generated by the anchor bolt expansion sheet and the concrete tapered surface to form a locking key to achieve the fixing effect, there are strict requirements for the quality of concrete reaming, and the reaming accuracy directly affects the anchoring strength.
Rear expansion bottom anchor bolts are divided into:
Each expansion piece of the anchor bolt has milling cutter teeth, which can contact the chips. Because the expansion piece of the anchor bolt with this structure gradually expands when it is subjected to external pressure, it is always in close contact with the concrete hole wall during the cutting process, so the hole expansion accuracy is high. After the external load is applied to the anchor bolt, the contact compressive stress between the expansion piece and the conical surface concrete hole wall is evenly distributed. The multi-tooth design of the head of the anchor bolt can realize continuous cutting, not only can cut concrete, but also can cut and continue to ream when steel bars are encountered, forming a locking key mechanism. The LZK self-cutting and reaming anchor successfully solves the problem of inability to ream in the presence of steel bars, and is a major technological breakthrough in the field of mechanical post-anchoring.
shellyn-anchor.com