Soil Screws

Faster, with fewer steps, the CHANCE SOIL SCREW™ system gives you the following economic advantages:

• Install quickly by the same hydraulic rotary equipment commonly used for soil nail wall construction
• Immediate loading
• No spoils to remove
• Install in any weather
• Easy to store, reusable

To remove the performance uncertainties and associated costs of grouted soil nails in soils of low shear strength, the CHANCE SOIL SCREW™ system employs screw anchors. When placed in the soil a screw anchor acts as a bearing device. This is its fundamental difference compared to a grouted anchor, which relies on friction between the soil and the grout.

In a soil nail application, the SOIL SCREW™ system constructs a gravity wall to reinforce in-situ soil with screw anchors nearly horizontal. Anchor sizes and grid spacing are determined by soil conditions and load requirements. A reinforced-shotcrete veneer often is applied to the face.

Predictable results - Capacity is proportional to installation torque Helical bearing plates are spaced along the entire length of SOIL SCREW™ anchors. These true-spiral helices install with ease and minimal soil disturbance. Monitoring torque during installation accurately indicates expected holding capacity.

Technical support and pre-engineered system for design flexibility and standards compliance The SOIL SCREW™ Retention Wall System is based in more than 80 years of earth-anchor research and development by ISO-certified manufacturer A. B. Chance Company, which also markets to electric utilities, telecommunications and pipeline industries worldwide.