SOIL STABILIZATION channel protection OVERVIEW

The Presto GEOWEB® system provides a wide variety of economical, flexible protection treatments for open channels and hydraulic structures. The system delivers stability and protection of channels exposed to erosive conditions ranging from low-tohigh flows, either intermittent or continuous. GEOWEB® System Benefits • Confinement in the GEOWEB® cellular structure greatly improves the hydraulic performance of conventional protection materials such as topsoil/vegetation, aggregate and concrete. • Supports vegetation in intermittent flow channels. • Local aggregates may be used in low-tomoderate...

DESIGN OPTION Vegetated Channels - Single-Layer GEOWEB® cells with vegetated topsoil infill GREEN-ENGINEERED CHANNEL LINING SYSTEMS GEOWEB® Vegetated Channels offer protection in continuous low-flow channels, as well as high-flow intermittent channels, allowing lower-maintenance, aesthetically pleasing vegetation in place of rip-rap. The 3D cellular network creates check-dams that protect the upper soil layer from hydrological erosive forces and resulting erosion that impacts unconfined soils. With an overlying Turf Reinforcement Mat (TRM), the vegetated GEOWEB® system can withstand velocities...

Vegetated Channels - Multi-Layer NATURAL ALTERNATIVE TO WIRE-FRAMED GABION BASKETS Multi-layer GEOWEB® side slopes with vegetated infill GEOWEB® Multi-Layered Channels can withstand higher flows for short durations, allowing naturally vegetated channels to be designed in place of hard armoring (gabions or concrete). GEOWEB® multilayered channels tolerate reasonable differential settlement without loss of integrity so they perform well in soft-soil environments. • Green and tan fascia panel options allow natural blending with the environment. • Under extreme flows, the system with wrapped-coir...

Aggregate Channels AGGREGATE/RIP-RAP FOR LOW- TO MODERATE-FLOW CHANNELS GEOWEB® Aggregate Channels are designed for low-to-moderate flow conditions. Aggregate confined in the GEOWEB® 3D structure is far more stable than when unconfined. Channel Depth GEOWEB® with aggregate infill Bottom Width As a result, smaller, less expensive aggregate can be used instead of large, difficult-to-place rip-rap. GEOWEB® confinement reduces the rock size up to 10 times while still delivering the same protection. Unconfined Aggregate Performance backed by Colorado State University Testing. Presto incorporates research-based...

Hard-Armored Concrete Channels PORTLAND CEMENT CONCRETE FOR CHANNELS WITH HIGH HYDRAULIC STRESSES GEOWEB® Concrete Channels are a poured-in-place, hard-armored solution for channels exposed to severe velocities and hydraulic stresses. The system becomes a flexible slab that conforms to minor subgrade movement and is more economical than pre-formed concrete systems or Articulated Concrete Blocks (ACBs). GEOWEB concrete channels are proven* to withstand sustained flow velocities in excess of 36 ft/s (11 m/s) ® Channel Depth Bottom Width GEOWEB® with concrete infill and shear stresses of 20.9 psf...

DESIGN CRITERIA Channel protection details are influenced by the embankment and bed slope length and angle, flow depth and velocity and shear stress. Presto's free project evaluation service can help determine suitable cell size and depth for your project. The complete GEOWEB® channel protection system may include some or all of the following: OPTIONAL COMPONENTS • ATRA® Anchors & Speed Stakes • Polymeric tendons • ATRA® Tendon Clips • Geomembrane TYPICAL COMPONENTS • GEOWEB® sections • Cell infill materials • Geotextile separation layer • ATRA® Key connection device The following accessories...

COMPREHENSIVE SERVICES AND RESOURCES Presto GEOSYSTEMS® and its distributors/representatives offer the most-complete services in the industry to support project design and installation requirements. Free Project Evaluation Service: RESOURCES: • Engineering analysis/technical overviews We analyze specific project needs and provide recommended preliminary designs for each project. • SPECMaker® specification development tool Construction Services: • Technical resources binder/case studies Qualified on-site field support specialists can be available for construction training, and start-up installation...