Self-drilling Anchor Bolt Installation
First, we must use a drill rod to drill a hole with a rig in the rock or soil. And then, we pull out the drill rod and put the hollow bar in. What’s following is grouting and anchoring. The whole construction is very complex. What’s worse, when processing at unstable ground, the drilling hole will probably collapse and no way is the hollow bolt put in. If this happens, the entire program would be postponed, and we can’t ensure the anchoring effect for further use.
On contrary, the installation of self-drilling anchor bolt system is much easier.
We can only drill once to complete the grouting and anchoring process since the hollow bar of self-drilling anchor bolt is not only a drill rod but also an anchor bar. It is hollow, so we can drill and grout at the same time.