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The Sinorock Self Drilling Hollow Injection Anchor System is today’s solution for a fast and efficient anchoring system into virtually any type of soil. The system has historically been known as a “self-drilling anchoring” because the hollow fully-threaded bar serves as both the drill string and the grouted anchor, thus installation is performed in a single operation. The sacrificial drill bit is threaded onto the end of the Sinorock-Drill bar and left in place following drilling. The drilling fluid (air, water, or grout) is introduced through the hollow bar and allows the spoils to flush from the borehole.

The Sinorock-Self Drilling Hollow Injection AnchorSystemtem is particularly suitable for soils that do not allow for open-hole drilling (i.e. granular soils that are collapsible in nature). In such cases, drilling with a grout fluid serves the purpose of flushing spoils from the borehole and prevents looser, surrounding material from collapsing due to the higher relative density of the grout. Sinorock-Self Drilling Hollow Injection Anchor System should be considered on any project requiring fast production that would otherwise need to involve a casing system in order to maintain borehole stability.

The Sinorock-Self Drilling Hollow Injection Anchor System is an ideal choice for soil nailing in difficult soils as it offers high installation rates. Hollow bar elements have gained approval for permanent soil nail use in Europe and have also been used extensively for permanent soil nails in the United States.

The Sinorock-Self Drilling Hollow Injection Anchor System offer an excellent choice for micro piles in difficult ground conditions where open-hole drilling isn’t possible.

In general, Sinorock recommends using the Sinorock-Self Drilling Hollow Injection Anchor System in difficult soils that do not allow for open-hole drilling.