DYWI Drill Hollow Bar Soil Nail
Self-drilling system for loose soil, no casing required.
- Excavation Support
- Slope Stabilisation
- Face Stabilisation
DYWIDAG Dywi Drill Hollow Bar Soil Nails are ideal for loose soils, as they can be installed without the need for a casing. The system is used for mixed fills, granular material, and loose overburden. DYWIDAG Dywi Drill Hollow Bar Soil Nails allow drilling and grouting to be combined as a single operation and complies fully with EN 14490 (European standard for soil nails).
Available for any length of service life, the DYWI Drill Hollow Bar Soil Nails are a passive system suitable for installation where open hole drilling and grouting is not possible, such as in cohesionless soils.
Quicker installation as drilling and grouting are done simultaneously
Passive system suitable for use even in poor soil conditions
Left-hand thread compatible with percussive drill tooling for complete installation flexibility
Bar diameters R25-R51 supplied with rope thread; T76 supplied with trapezoidal thread
Range of drill bits for soils and rock, including tungsten carbide buttons and chisels to suit all applications
External thread enables the bars to be cut and coupled at any point, as well as terminated with a nut, for easy on-site length adjustments
Main standards for steel nuances
Europe/ Asia/ Latin America: EN 10083-1
UK: EN 10083-1
North America: Tendons with ultimate loads from 45 kips to 832 kips
Rotary injection adapters to connect between the hammer and the hollow bar, enable grout to be injected into a rotating bar
Drill bit adaptor sleeves offer the option of using larger diameter drill bits with smaller bars
Beveled washers for use on bearing plates on uneven ground support
Range of drill tooling including reducing couplers, box/pin adaptors and drill spanners
Corrosion protection options include grout cover, sacrificial corrosion allowance, hot-dip galvanizing, Duplex (hot-dip galvanizing and epoxy coating)
Bearing plates with angle compensation or shear tubes
Domed nuts, hex nuts, couplers and steel spacers