Self-drilling hollow bar is a hollow bolt, it screw-threads of the full surface, using coupling socket length, installation of a one-time of the drill on
the front end .
Due to the special structure of self-drilling hollow bar ，so anchoring construction has the following advantages:
high efficiency, self-drilling hollow prestressed anchor technology setsdrilling，grouting,and anchoring as a whole, each step in a process of construction is completed, you can save construction time.
Adapted to the difficultive hole formation, in case of relatively soft, broken wall rock, generally more difficult to hole, even if it is easy to fall into the fashioned hole, the hole is difficult to penetrate the other anchor or anchor rope, and self-drilling hollow bolt technology just to avoid the shortcomings of conventional methods, after drilling is completed, the rod without exiting to stay in the hole, so afraid of the collapse of the hole, saving time to wear into the other rod and reduce the difficulty of construction.
Adaptability, self-drilling hollow bolt full threaded rod can be cut off at any position to take a long, suitable for different construction conditions.
High anchoring force, self-drilling hollow bolt rod trapezoidal thread, and coupling sleeve coupling solid, combined with grout body good.
the front end .
Due to the special structure of self-drilling hollow bar ，so anchoring construction has the following advantages:
high efficiency, self-drilling hollow prestressed anchor technology setsdrilling，grouting,and anchoring as a whole, each step in a process of construction is completed, you can save construction time.
Adapted to the difficultive hole formation, in case of relatively soft, broken wall rock, generally more difficult to hole, even if it is easy to fall into the fashioned hole, the hole is difficult to penetrate the other anchor or anchor rope, and self-drilling hollow bolt technology just to avoid the shortcomings of conventional methods, after drilling is completed, the rod without exiting to stay in the hole, so afraid of the collapse of the hole, saving time to wear into the other rod and reduce the difficulty of construction.
Adaptability, self-drilling hollow bolt full threaded rod can be cut off at any position to take a long, suitable for different construction conditions.
High anchoring force, self-drilling hollow bolt rod trapezoidal thread, and coupling sleeve coupling solid, combined with grout body good.