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Please look at the information and related sources for Geosynthetics below, or, post a question in the Geotechnical Forum. Scroll down on the right column for numerous technical guidance in other areas of geotechnical engineering.

Geosynthetic Publications Available for Downloading

FHWA NHI-00-044 - Corrosion/ Degradation of Soil Reinforcements for Mechanically Earth Stabilized Walls and Reinforced Soil Slopes. Discusses corrosion of metals, corrosive soil environments, geosynthetic durability and degradation, monitoring and testing for soil reinforcements.

FHWA RD-97-142, 143, 144, and 00-157 - Durability of Geosynthetics for Highway Applications. This research document was intended to predict long-term strength loss of geosynthetic tensile capacity, primarily for mechanically stabilized earth (MSE) retaining walls, reinforced soil slopes and foundation applications.

NAVFAC 7.01 - Soil Mechanics. This publication includes soil/ rock identification and properties, field exploration, field testing, instrumentation, laboratory testing, distribution of stresses, settlement analysis, volume expansion, seepage, erosion control, drainage filters, slope stability and slope protection.

USACE TL 1110-1-189 - Use of Geogrids in Pavement Construction. Manual for utilizing geogrids in all types of flexible road and airfield design. Includes design examples for gravel and flexible pavement roadways.

USACE TL 1110-2-286 - Use of Geotextiles Under Riprap. Includes general guidance of bedding, preparation equipment and placement of geotextiles under riprap. Also, includes provisions for groundwater and surface water.


Geosynthetics Technical Guidance

Geosynthetics are sometimes separated by two specific categories: geofabrics and geogrids. Other related synthetics, or symantics are geotextiles, geomembranes and geonets. Sometimes, geosynthetics are necessary for a particular design, beneficial by increasing the design life, reducing future maintenance costs, or reducing construction costs. Basically, geosynthetics are used as filtration, drainage, separation, reinforcement, and erosion/ sediment control.

Geofabrics are woven or non-woven. Woven geofabrics may be utilized to separate engineered fill from fine soils by preventing the infiltration of fine soils into the fill. Applications include preventing fine soils in a road base coarse material, preventing fines from clogging drain pipes, or used as fencing to reduce sedimentation and erosion.

Geogrids can be utilized to increase the strength, stability, and reinforce engineered fill. Geogrids are sometimes used to increase the structural number in a pavement analysis when the road subgrade is composed of soft compressible soils. Other applications include reinforcement for Mechanically Stabilized Earth (MSE) designs.

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