Our know-how is the result of over 40 years of experience in the production and global supply.
The system features a hollow bar, which is used as a drill string for drilling either with water flush, air flush or cement grout flush.
All system components are rigorously tested according to stringent factory standards and ISO 9001 to ensure that the specifications are met. The sacrificial drill bit significantly enhances the productivity of the installation process. In order to improve performance and cost-effectiveness, project data are being collected from around the world.
Continuous optimisation of our drill bits is a primary concern to further improve the penetration rate and bit quality while at the same time reducing manufacturing costs. For improved corrosion resistance, Self Drilling Anchor components are either hot dip galvanised or fitted with a TwinCoat coating (hot-dip galvanisation with an additional dual epoxy coating).
Drill bit adapters increase flexibility by allowing the use of drill bits designed for other dimensions of hollow bars.
Spacers are used to centre the hollow bars within the borehole and to ensure the correct grout cover of the load-bearing element according to the relevant standards and as specified in the approvals.
The grout swivels consist of a grout body and a swivel shaft and are attached to the shank adapter. A large variety of grout swivels for all standard types of shank adapters is available. The grout swivels are suitable for simultaneous drilling and grouting.
Coupling boxes (crossover couplers) must be installed between the shank adapter and the hollow bar during the drilling operation.
A CE-approved pull tester is available to test the self-drilling nails and piles after installation of the system and curing of the grout body.
We recommend the use of the M400NT grout pump to produce a grout mixture with a controlled water/cement ratio.
For geotechnical applications, we recommend M440GE pump to produce a grout mixture with a controlled water/cement ratio.
Micropiles are small diameter grouted piles (typically less than 300 mm in diameter) transferring compressive, tensile or alternating loads into the surrounding ground. Dependent on the ground conditions, Self Drilling Micropiles are designed either as end-bearing or friction piles.
Self Drilling Micropiles are typically installed via simultaneous drilling and grouting using cement grout as the flushing medium. Particularly in cohesionless or unstable ground conditions e.g. sand, clay or gravel, this is the fastest and most efficient installation method for micropile systems.
SRNs are typically grouted along their entire length. In geotechnical engineering, they are used to stabilise natural or artificial slopes or to support structures e.g. retaining walls. To further stabilise the surface of the slope or rock, various support systems e.g. flexible reinforcing meshes or geotextiles may be installed that are held in place by the head plates of the nails.