Helical Tiebacks & Soil Screws

The CHANCE Helical Tieback Anchor and Soil Screw System is a segmented deep foundation system with helical bearing plates, welded to a central steel shaft. Load is transferred from the shaft to the soil through these bearing plates.

Tieback anchors and soil screws are installed by rotating the anchors into the ground with rotary drilling equipment. Once the minimum depth is obtained, the capacity can be determined by reading the installation torque and correlating it to the holding capacity ratio.

Benefits of CHANCE Helical Tieback Anchors and Soil Screws:

  • No vibration during installation
  • No excavation spoils to remove
  • Low mobilisation costs
  • Install in any weather
  • Highly corrosion resistant
  • The CHANCE Helical Soil Nail installs in limited access situation – hand-installation in some cases
  • Ability to be installed in close proximity to underground services
  • Capacity of each helical pile is accurately measured using installation torque
  • Pile can be loaded immediately after installation or, in the case of a Helical Pulldown Micropile,  when the grout has set
  • End-bearing/friction composite pile
  • High-capacity: tested to 1,335 Kns
  • Transfers load through weak soils to high capacity end bearing helical plates
  • 100mm to 255mm diameter grout columns

Gallery

Belgium limited access soil screw installation (2) Belgium limited access soil screw installation (1)