Self-drilling hollow anchor consists of drill bit, hollow anchor bolt, plate, nut, centralizer and couple. It integrates drilling, grouting and anchoring and has the characteristics of reliability, high efficiency and convenient construction.
Self drilling hollow anchor bolts emphasize the construction of a flexible support system drilled in a suitable place on the construction surface. It is drilled in a suitable place on the construction surface. During the drilling process, multiple revolutions, repeated sweeps, and drilling slowly, until the intended hole depth. The grouting is performed at the same time as drilling, and the grouting material is removed from the drill hole through the hollow anchor body. When returning the pulp from the anchor hole, it indicates that the anchor hole has been filled, stop the grouting, and plug the end of the anchor rod with a stopper plug. After grouting, when the grouting material does not reach the design strength to avoid knocking, vibration and suspension, when the requirements are met, tighten the nut and apply stress. The foundation will become very strong through support of self-drilling hollow bolt .
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