Slope Stabilization

CHANCE® Soil Screws and MANTA RAY® earth anchors provide reliable anchoring for steep slope stabilization—for remediation or new construction. Both systems are fast to install with small equipment, create minimal disturbance, and avoid large excavations or spoils.

CHANCE® Soil Screws (Helical Soil Anchors)

CHANCE® Soil Screws develop resistance to sliding by advancing load-bearing helical plates along the anchor length into competent soils. The plates act in bearing (not friction), which reduces the uncertainties and costs associated with grouted soil nails in low-shear soils. Soil Screws install with minimal disturbance, require no grout or cure time, and can be loaded immediately.

Benefits of CHANCE® Soil Screws

  • No grout; no cure time
  • Fast, clean installation with immediate loading
  • No spoils to remove
  • Lower installed costs; one-trip convenience
  • Installs in limited-access areas
  • No specialized installing equipment required

MANTA RAY® Earth Anchors (Percussion-Driven)

MANTA RAY® anchors are percussion-driven anchors that are set and then proof-loaded at lock-off, providing on-site verification. They’re well-suited for light to moderate slope loads (soil and depth dependent), rapid mobilization, and tight-access work where small crews and minimal disturbance are priorities. Installation uses compact tools (e.g., demolition hammer, small excavator hammer) and produces no spoils.

Benefits of MANTA RAY® Anchors

  • Fast installation with small equipment
  • Proof-loaded at lock-off for verified performance
  • Minimal disturbance; no spoils to haul
  • Efficient for tight-access slopes and rapid response work
  • Note: MANTA RAY® anchors are not removable

When to Use Each Product

  • Use CHANCE® Soil Screws when you want bearing-mode capacity along the anchor length, immediate loading with no grout, and rotational installation that correlates to installation torque.
  • Use MANTA RAY® anchors when the slope stabilization calls for quick, proof-verified installs, minimal disturbance, and small-equipment access for light–moderate load demands.

Design & Support

Selection depends on slope geometry, required anchor loads, soils, access, and testing requirements. We support the engineer of record with product data, preliminary capacity guidance, and proof-testing recommendations.

Need a tiedown solution? CHANCE® and MANTA RAY® anchors are a simple, proven solution

If you’re working on projects that require secure tiedowns, our anchoring solutions are proven in these applications too:

  • Guy Anchoring — towers, poles, and guyed structures
  • Anti-Buoyancy — tanks, pipelines, and buried structures
  • Mooring — docks, barges, and floating marine structures

Ready to plan your slope solution?

Ask an Engineer or Request a Quote.

Want to learn more? Visit our Soil Screw and Helical Tieback Anchor pages.

CHANCE® Soil Screws for steep slope stabilization provide anchoring resistance to sliding forces within slopes. This earth stabilization system is fast and easy to install, requires no cure time, uses small equipment for difficult access areas, limits materials needed and creates no spoils.

Removes Performance Uncertainties

The superiority of CHANCE® Soil Screws over driven soil nails as a slope stabilization product is due to their load-bearing helical plates. Bearing plates are spaced along the entire length of the anchor and screwed into the earth with minimal soil disturbance. This slope retention system removes performance uncertainties and associated costs of grouted soil nails in soils of low shear strength. Screw anchors in soil act as bearing devices for earth stabilization as opposed to driven anchors, which rely on friction between the soil and grout. This soil stabilization equipment's speed and bearing mode can beat the delays and costs of traditional methods while providing soil slope stability.

Benefits of using CHANCE® Soil Screws for steep slope stabilization:

  • No grout
  • Fast and clean installation
  • Immediate loading
  • No spoils to remove
  • Lower installed costs
  • One-trip convenience
  • Installs in limited access areas
  • No specialized installing equipment required

Want to learn more? Check out our Soil Screw and Helical Tieback Anchor pages.