Sinorock self-drilling anchor system consists of a fully threaded hollow-core steel bar which can be drilled and grouted into loose or collapsing ground without casing and acts as reinforcing element according to Ground Engineering principals e.g. Soil nail, Rock bolt or anchor. The bar features a hollow core for passing of flushing medium (air or water) and can be drilled and then post grouted as well as installed using simultaneous drilling and grouting. The bar is manufactured with a continuous left hand thread (“R” for Rope and T“ for Trapezoidal thread) and can be extended by the use of extension couplings, while connecting via standard drilling adapters to the rotary percussion drill head (also called Rock drill or Drifter) used on the feed of the drilling equipment. This rotary percussion drill head then provides and passes the rotation and impact energy through the threaded hollow steel bar down to the drill bit, which cuts the soil or rock formation to form the borehole.
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