Geotextile Reinforced Soil Bridges
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Fish and Wildlife Friendly No Concrete Footings No Pile Foundations Rapid Installation Scour and Piping Resistant Low Maintenance Improved User Safety PRE-ENGINEERED OPEN BOT TOM BRIDGES ail.ca © 2015 Copyright Atlantic Industries Limited

About GRS Bridges The AIL GRS Arch is a patented buried bridge system developed for the forestry and resource sectors. GRS buried bridges are typically constructed using local materials and conventional road construction equipment. Fish and Wildlife Friendly: GRS buried bridges maintain the original streambed, reducing the impact on fish and wildlife. Where the streambed does not exist, streambed reconstruction is part of the GRS bridge design. Structures can be sized wider than the natural streambed to permit passage of other wildlife. Flexible headwall designs help to minimize the...

Benefits of GRS Solutions GRS structures are available in spans up to 8.3 m, supporting L-100 logging trucks/CL-800 vehicles. All shipped components are standardized with custom bridge lengths available to accommodate the desired road widths. GRS 20S AIL SUPER•COR LOW PROFILE ARCH PERIPHERY = 20S END AREA = 9.51 m2 6636 INSIDE BOTTOM SPAN 6750 C/C BASE CHANNEL Scour and Piping Resistant: The structural backfill is wrapped in an envelope of geotextile which reduces the risk of backfill materials piping or foundation scouring during high water events. Low Maintenance: Walls “green up” with...

How it Works GRS buried bridges are a soil-steel geotextile composite structure. Dead and live loads are supported by the reinforced soil, structure and natural or improved subgrade soils. GRS Buried Bridge – Cross-section View 3 1. Anchor Rods – The arch structure is connected to the GRS soil mass composite with soil anchor rods. The anchor rods ensure the structure maintains shape during backfilling. 2. GRS – Closely spaced geotextile between layers of compacted backfill act to confine the soil particles. 3. Boulder layer foundation – Used in lieu of conventional strip footings or pile...

Standard Pre-Engineered Designs Geotextile Reinforced Soil Bridges *Note - other custom designs available - larger spans/live loads/different foundation systems can be considered. Design Guidelines Maximum Live Load = L-100 or CL-800 (200,000 lbs) ► Medium-dense coarse-grain foundation soil or better (0 > 38 degrees) ► Minimum 0.5 m deep x 3 m wide boulderfoundation with sand and gravel compacted in voids ► Durable, well graded engineered backfill with low fines ► AIL design guideline drawings are available on request. Scope by others includes: - Foundation investigation and design by a...

1. Following installation of a stream diversion 2. Lift pre-assembled arch sections onto the leveled 3. Place non-woven geotextile to envelope the first and culvert removal, construct the boulder foundation after placing armour material and layer of backfill and create a wick drain. foundation and scour resistant stream channel in stream channel structures (i.e. groins) along the lieu of conventional footings or piles. Voids are to length of the structure. be filled with clean sand/gravel. 4. Scribe wire forms to accommodate the curve of 5. Drape woven geotextile over the forms, taut to 6....

Custom Designs In addition to standard, pre-engineered designs, GRS Bridges can also be custom designed to suit a wide variety of spans, covers, live loads and subsurface conditions. Consulting services can be provided to review the applications on a project specific basis. Example projects are shown below: Image courtesy of British Columbia Ministry of Forests, Lands & Natural Resource Operations 7 m span Super•Cor Arch 17 m of cover Foundation was a compacted layer of gravel encased in non-woven geotextile Partially constructed in sub-zero weather Permitted wide running surface for the...

FOR PROJECT GUIDANCE AND ASSISTANCE, CALL TOLL-FREE 1-877-245-7473, OR EMAIL INFO@AIL.CA Canada, we have your bridges. And more. If you have a crossing, we can bridge it. Atlantic Industries Limited (AIL) offers a wide range of efficient bridges – Structural Plate, Prefabricated, Culvert – all engineered to deliver optimum performance and value for your application. We also provide supporting products like Retaining Walls, Abutments and Sound Walls to make your bridging projects even more convenient. By design, our complete line of value-engineered bridging solutions are easy to ship and...