DYWIDAG-Systems International (DSI) is a specialist manufacturer and supplier of geotechnical products for ground engineering applications. DSI has specialised in the production of ground anchors for over 40 years and leads the market in the manufacture of permanent anchors with double corrosion protection (bar or strand), threadbar systems and self-drilling hollow bars.

The product range includes:

  • Temporary and Permanent Ground Anchors with Double Corrosion Protection in accordance with BS8081 and EN1537.
  • Multi-Stage Ground Anchors for weak ground
  • Removable Ground Anchors for inner city locations.
  • DYWI ® Drill Hollow Bar. Self-drilling system for soil nailing, micro piling and temporary works anchors (Øs R32-T76).
  • Soil Nails: Plain, galvanized or pregrouted DCP. Full range of articulating bearing plates for faced slopes.
  • Threadbar systems based on solid threadbar featuring a robust thread, left-hand or right-hand with two flats for self-cleaning. Threadbar range comprises of:
    1. GEWI ® Steel (Øs 16-63.5mm)
    2. GEWI ® Plus (Øs 18-75mm)
    3. DYWIDAG Prestressing Steel (Øs 15-75mm).
  • Fibreglass Bars for tunnelling and mining applications.
  • Stressing and Testing Services.

Major Projects supplied by DSI UK include:

  • M1 Widening at Luton using DYWI ® Drill Hollow Bar soil nails.
  • Rosyth Dockyard, Scotland: high capacity multi-strand anchors for dock wall stabilisation.
  • Limerick Tunnel, Co. Limerick, Ireland: DYWI ® Drill Hollow Bar for temporary anchors within the casting basin.
  • A3 Hindhead Tunnel, Guildford: GEWI ® soil nails, GRP Spiles, AT Pipe Roof System.
  • Heathrow Terminal 5. Temporary strand anchors installed with post-grouting function for bond enhancement.
  • Dublin Port Tunnel: High capacity rock bolts in tunnel roof, multi-stage strand anchors for TBM thrust frames, DYWI ® Drill Hollow Bar spiles for launch adit.
  • Gibraltar slope stabilisation: GEWI ® Soil Nails to stabilise slope face following decommissioning of water catchment facility.
  • CTRL: North Downs Tunnel, rock bolts and spiles. Ashford and Medway sections: temporary strand anchors. Gillingham section: GEWI ® Soil Nails.