Hollow anchor rod for anchor rod frame beam construction

The invention discloses a hollow anchor rod for anchor rod frame beam construction, and relates to the technical field of engineering support, the hollow anchor rod comprises an anchor head, a front rod body, a connector, a rear rod body and a stop-grouting plug, the front rod body is connected with the rear rod body through the connector, a base plate is welded on the rear rod body, the stop-grouting plug is sleeved in the rear rod body, and the front rod body is connected with the rear rod body through the connector. Centering devices are welded to the rear rod body at equal intervals and comprise bases, supports, semi-permeable membranes, annular grooves, double-layer frames and blocking air bags, the double-layer frames are fixed to the bases, the annular grooves are fixed to the bases through the supports and located between the double-layer frames, the blocking air bags are arranged in the annular grooves, and the semi-permeable membranes are arranged between the bases and the supports; a sleeve is arra