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Design and Installation Guidelines for Erosion Control
Geo Products, LLC 8615 Golden Spike Lane Houston, TX 77086 Phone: 281.820.5493 Fax: 281.820.5499 2011 Geo Products, LLC www.geoproducts.org

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Erosion Control Application Overview Applications (Slopes and Channels) Anchoring Techniques and Tools Geotextiles Infill Material Selection
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Installation2011 Geo Products, LLC

Erosion Control Application Overview
Many variables affect the installation and performance of EnviroGrid confinement systems, including slope grade, subsurface stability, infill material, rainfall and artificial watering conditions, hydraulic characteristics of ground water flow and sub base anchoring quality. Due to the large number of factors, it is difficult to applyexact parameters to individual applications without depending on engineering, design and environmental inputs of on-site professionals. BASIC FORMS OF EROSION CONTROL PROTECTION 1. Granular • • • • Reduces hydraulic energy, limiting forces within cells or under cells. Directs flow at the surface of the cell, eliminating flanking and undercutting. Controls individual particle movement caused bygravity and water flow. Results in a flexible and durable system.

2. Vegetation • • • • • Reduces hydraulic energy, limiting forces within cells or under cells. Increases natural resistance and protects root system. Directs water flow over the top, rather than through the mat. Prevents gutting and rills. Helps reduce moisture loss.

3. Concrete • • • • Controls piping and undercutting byallowing cells to conform to sub grade. Acts as a series of expansion joints, providing a flexible form. Develops vent structures where needed. Provides stability for steep slopes and for continuous flow channels.

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2011 Geo Products, LLC

Applications
SLOPES Design of EnviroGrid cellular confinement systems for slopes requires analysis of several site characteristics. The length, heightand angle of the slope and the failure angle of existing fill on the slope are important factors in determining the appropriate cell depth and anchoring design. EnviroGrid improves the performance of vegetated slopes by reinforcing root systems and directing hydraulic flows over the top of cells, with the cells acting as a series of check dams; thereby preventing formation of rills and gullies.EnviroGrid improves the performance of granular filled slopes by controlling the migration of fills that would otherwise be initiated by hydraulic and gravitational forces. This is accomplished by dissipating hydraulic energy in and underneath cells and by confinement of fill materials within cells.

CHANNELS EnviroGrid cellular confinement systems offer a large array of methods for solvingdifficult situations with channel bottoms and slopes where minimal to severe erosive forces are at work, with either intermittent or continuous flows. Cellular confinement allows the use of various types of infills, including soil with vegetation, aggregate, concrete or combination thereof, for unique and aesthetic applications.

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2011 Geo Products, LLC

Vegetative Soil Infilled ChannelConfined vegetative soil performs exceptionally well in applications with low to moderate flows. EnviroGrid Cellular confinement enhances the performance of vegetation through reinforcing root zones and directing flows over the top cells; there by increasing the shear resistance of the fill and providing a finished site that is aesthetically superior when compared to conventional methods. Soilinfill with grass cover: • Peak flow velocity less than 6 m/s (20 fps) and duration of peak flow less than 24 hours. • Peak flows velocity less than 4.5 m/s (15 fps) and duration of peak flow less than 48 hours. • Channel side slopes above high water level Aggregate Infilled Channel Aggregate performs well, allowing the use of different sizes for variances in flow velocities encountered from site to...
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