Although self drilling rock anchor support has instant load, prestressing force,good support,low labor intesnsity, low cost of supporting and so on advantages, vigorously promoteing the technology of self drilling anchor bolt support is a effective way to realize high production and high efficiency in working face.
Quick and reliable technology is essential for Metro Rail Extension. Grouting rock anchor can solve defects that unfilled grouting of traditional mortar anchor bolt during the construction and can’t grouting with pressure. The operation is simple, cost is low, construction is convenient and efficiency is clear. Grouting rock anchor can save engineering materials and improve utilization rate. It’s a very ideal choice for metro rail projects.




In high-slope protective engineering of Hydropower Station,it is easy to occur slip and destruction along shearing surface. To keep stable of slope, there are two ways: one is to cut slopes for reaching stable; the other one is to install retaining structures. While the first way is not economical or practical, so self drilling anchor is a quite convenient and safe method for reinforcement.
At about the early 20th century, self drilling anchor had been developed and employed. So far, many countries and regions have formulated standard and specification of it. It is widely used in mine roadway, railway tunnel, highway tunnel and drainage tunnel, etc. Recent years, with the rapid development of high-rise buildings and railway engineering, the technology of self drilling anchor is widely used for reinforcement in foundation pit, slope and landslide, etc.
The foundation of the slope widening had to be comprehensively anchored in load-bearing rock. For this purpose, self drilling rock anchors were used as micropiles to stabilize the retaining structure. In this system, the tendon simultaneously serves as a drill rod as well as a micropile. This dual feature ensures a very quick installation procedure because the borehole does not have to be drilled in advance as the self drilling rock anchors are drilled and grouted simultaneously.
Self drilling anchor is a structural system transferring tension to stable stratum or soil layer. It consists of anchor head, free segment and anchorage section, which can effectively control slide, collapse and destruction. In high-slope protective engineering of railway, self drilling anchor’s install position, inclination should be designed correctly to resist slope’s instability and destruction.
Adopting the method of self drilling anchor with sprayed concrete, drilling, grouting and anchoring function can combine together, safe, high-efficient and easy to operate.