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How Mechanical Anchors Work

Posted by Admin | 20 Apr
The principle of the mechanical anchor bolt with the bottom of the reaming hole is to expand the bottom of the existing concrete hole, and form a self-locking mechanism when the expansion sheet of the bolt head expands. It is generally understood that the head of the anchor bolt has room to expand in the concrete hole, without expansion and compression stress, and without sliding when subjected to external allowable loads. Since the extruded friction force generated by the expansion piece of the anchor bolt and the cone surface of the concrete fixes the expanded anchor rod, the expansion quality of the concrete should be strictly required, and the expansion accuracy directly affects the anchoring strength.
Compared with other types of bolts, mechanical bolts with enlarged rear have better high temperature resistance and weldability, so they are more flexible and commonly used in the market. The mechanical anchor bolt at the rear enlarged bottom has a mechanical locking effect, the anchoring force will not fail suddenly, and it has good seismic performance. In earthquake tests, when the strength of the seismic fortification is exceeded, it gives people the opportunity to escape secondary disasters and can be repaired after a major earthquake.
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