The self drilling anchor bar has a unique yielding behavior that can be achieved only with the proper steel manufacturing, which results in bolts that provide a high ultimate load with a large deformation capability.
Self drilling anchor support as a way of supporting, and there is a fundamental difference in traditional way of support.Traditional way of supporting is often caused by passive collapsed rock mass under loading, but anchor bolt supporting can actively strengthening rock and soil body, effectively control the deformation, prevents the occurrence of collapse.The main function of  self drilling anchor supporting is suspensory action, cut across function, and the roles of composite beams and extrusion strengthening effect.

The self drilling anchor of foundation support applied for other buildings or streets around the foundation pit, deep foundation pit or the poor soil stability conditions.Self drilling anchor bolt through the friction of  its soil and soil pressure on the bolt, and if necessary, also anchor pipe can be added when necessary for stronger support to deal with a large area of soft soil layer. For foundation support, anchor supporting has flexible, economic and easy to operate, safe and fast these features.And in the process of the installation of the self drilling anchor bolt, which won't generate a lot of noise and strict with construction site, even if it also can complete the set up in the narrow space.
For 5 years，Sinorock has been offering the self drilling anchor bolt as a unique, safe and reliable system of rock support. As the market leader in underground rock excavation technology,Sinorock has also been developing safer and more efficient rock reinforcement products such as the Manganese line anchor bolts, which are manufactured from a special type of steel. 

http://selfdrillanchor.hatenablog.com/entry/2016/07/18/161248