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Geo-grids
Mar 17, 2018

Geosynthetic 


Geogrid

• Geo grids represent a rapidly growing segment within the geosynthetics area. Rather than being a woven,non-woven or knit textile or textile-like fabric, geogrids are plastics formed into a very open, grid like configuration, i.e., they have large apertures.

• Geo grids are either stretched in one or two directions

for improved physical properties or made on weaving

machinery by unique methods.

• By themselves, there are atleast 25 application areas, however, their function is exclusively as reinforcement materials.

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Geo-nets

• Geo-nets, called geospacers by some, constitute another specialized segment within the geosynthetic area. They are usually formed by a 

continuous extrusion of parallel sets of polymeric ribs at acute angles to one another. When the ribs are opened, relatively large apertures are formed into a net-like configuration.

• Their design function is completely within the drainage area where they have been used to convey fluids of all types.

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Geosynthetic Clay Liners

• Geo-synthetic clay liners (or GCLs) are the newest subset within geosynthetic materials. They are rolls of factory fabricated thin layers of bentonite clay sandwiched between two geotextiles or bonded to a geomembrane. Structural integrity is maintained by needle punching, stitching or physical bonding.

• They are seeing use as a composite component beneath a geomembrane or by themselves as primary or secondary liners

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Geocomposites

• A geocomposite consists of a combination of geotextile and geogrid; or geogrid and geomembrane; orgeotextile, geogrid, and geomembrane; or any one of these three materials with another material (e.g., deformed plastic sheets, steelcables, or steel anchors).

• This exciting area brings out the best creative efforts of the engineer, manufacturer, and contractor.

• The application areas are numerous and growing steadily.

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Advantages

The manufactured quality control of geosynthetics in a controlled factory environment is a great advantage over outdoor soil and rock construction. Most factories are ISO 9000 certified and have their own in-house quality programs as well.

The thinness of geosynthetics versus their natural soil counterpart is an advantage insofar as light weight on the subgrade, less airspace used, and avoidance of quarried sand, gravel, and clay soil materials.

The ease of geosynthetic installation is significant in comparison to thick soil layers (sands, gravels, or clays) requiring large earthmoving equipment.

Published standards (test methods, guides, and specifications) are well advanced in standards-setting organizations like ISO, ASTM, and GSI.

Design methods are currently available from many publication sources as well as universities which teach stand-alone courses in geosynthetics or have integrated geosynthetics in traditional geotechnical, geoenvironmental, and hydraulic engineering courses.

When comparing geosynthetic designs to alternative natural soil designs there are usually cost advantages and invariably sustainability (lower CO2 footprint) advantages.

Disadvantages

Long-term performance of the particular formulated resin being used to make the geosynthetic must be assured by using proper additives including antioxidants, ultraviolet screeners, and fillers.

The exposed lifetime of geosynthetics, being polymeric, is less than unexposed as 

when they are soil backfilled.

Clogging of geotextiles, geonets, geopipe and/or geocomposites is a challenging design for certain soil types or unusual situations. For example, loess soils, fine cohesionless silts, highly turbid liquids, and microorganism laden liquids (farm runoff) are troublesome and generally require specialized testing evaluations.

Handling, storage, and installation must be assured by careful quality control and quality assurance about which much


GEOTRST Co.,Ltd  is one of the leading manufacturers and trading company of geosythetic in China.  Our headquarter located in Shanghai, China. We have 15 years in geosynthetic production and distribution.

 

Our main products include various size and colors of PP/PET woven and non-woven fabrics (of 91cm-620cm width), such as geotextiles, geotextile containers (geotextile bags, tubes and shipping containers), silt fence, geogird, geosynthetics and so on.


More information for Woven Geotextilehttp://www.geotrstgroup.com/geotextile/woven-geotextile/