PRE-STRESSED ANCHOR CABLE EXPANDABLE INNER ANCHOR HEAD

摘要

A pre-stressed anchor cable expandable inner anchor head, comprising a hollow flower tube (12), a thin-walled steel pipe (3), a top sealing plate (5), a bottom sealing head (6), an anchor grab (1) and a support grab (4). The hollow flower tube (12) is internally provided with a central shaft hole along the axial direction thereof. The thin-walled steel pipe (3) is disposed in the central shaft hole in the hollow flower tube (12), and the thin-walled steel pipe (3) moves back and forth in the central shaft hole in the hollow flower tube (12). While increasing the contact area between the inner anchor head and a grouting body by means of the hollow flower tube (12), under the dual anchoring action of the anchor grab (1) and the support grab (4), the anchoring force of the anchoring section of an anchor cable is greatly improved, which helps complete subsequent grouting work.