SELF DRILLING ANCHORS SDA Rock Drill Systems

SELF DRILLING ANCHOR SDA Systems

High Standard Fully Thread Hollow Bar

SELF DRILLING HOLLOW BAR ANCHORS

The systems have been called as "self-drilling anchoring" or "injection piling" because the hollow fully-threaded bar serves as both the drill string and the grouted anchor, thus the installation is performed in a single operation.

The Drill-Grout systems includes several parts as below:

Hollow Anchor Rods

Hollow Anchor Rods-Rope Thread Bar

The anchor rod features a hollow bore for flushing, or simultaneous drilling and grouting.

It is manufactured in accordance EN10210-1:2006 standard.

(EN10210-1:2006: Technical delivery requirements of Hot finished structural hollow sections of non-alloy and fine grain steels.)

And the Standard thread profile is according to ASTM A615 and ISO 10208. This makes the bond between the rod and grout concrete strong enough.

R-thread Φ32-38 mm according to ISO 10208

The manufacturing process assures the balance of yield strenght and ductility. Prevent hollow bar anchors from sudden fracture while drilling.

Bending Test for hollow bars

All parts of the system can be supplied with surface treatment, with a hot-dip galvanised finish or with a duplex coating.

HEXAGONAL AND SPHERICAL NUTS

Hexagonal nut

The hexagonal and spherical nuts are made from high precision steel (40Cr,HRC 20-25) to meet the stringent demands on anchor specifications and the daily uses of reinforcement work.

All nuts exceed the ultimate strength of the rod.

EXTENSION COUPLINGS

Couplings

The hollow bar is continuously threaded, it can be cut and coupled anwhere along its length.

The coupling enables direct end-to-end energy transmission between each bar, reducing losses and ensuring maximum percussive engergy at the drill bit.

DRILLBITS

Cross/Button Drill Bits

The sacrificial drill bit is an important part of the self drilling anchoring system.

Choose suitable bits according to different soil type.