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    Cellular Confinement Systems are popularly known as "Geocells".Geocells are strong, lightweight, three dimensional systems fabricated from ultrasonically welded High Density Polyethylene(HDPE)strips that are expandable on-site to form a honeycomb-like structure.Geocells are filled with compact non cohesive soils which are confined within the cellular walls.The composite forms a rigid to semi-rigid structure.The depth of the geocells as well as the size of each cellular unit can vary as per design requirements. a
    Generally, the infill is sandy or gravelly material.However the infill may be a
    plain concrete depending on the application such as erosion protection, water channel formation, etc.
    The surface of the Geocell is textured to increase soil-Geocell wall friction.The Geocell wall is punctured to assist in immediate dissipation of developed pore water pressures due to increased stresses within the infill of the individual cells.
    Types of Geosynthetic Sepration Reinforcement Filteration Drainage Containtment Protection
    Geofoam is a product created by a polymeric expansion process resulting in “foam” consisting of many closed, but gas-filled, cells.The skeletal nature of the cell walls is the unexpanded polymeric material.The resulting product is generally in the form of large, but extremely light, blocks which are stacked side-by-side providing lightweight fill in numerous applications.
    Geosynthetic clay liners, or GCLs, are an interesting juxtaposition of polymeric materials and natural soils.They are rolls of factory fabricated thin layers of betonies clay sandwiched between two geotextiles.Structural integrity of the subsequent composite is obtained by needle-punching, stitching or physical bonding. These comprise of a layer of low water permeability, high swelling sodium bentonite sandwiched between two layers of geotextiles.These are like carpets and are very effective barrier systems for waste and liquid containment.The use of GCLs are mandatory in western countries where environmental regulations are high. a
    Geosynthetic Clay Liners GCLs require soil cover of at least 300mm to provide sufficient normal force to confine the expansion of the bentonite core layer.The bentonite swells and extrudes through the geotextile fabric at the overlap, forming a seal by producing a dense and uniform clay barrier with the same hydraulic qualities in all parts of the clay liner.
    The prefabricated vertical drain is a long flat tube of woven or non-woven geotextile with a crore inside.For construction of structures on sites underlain by thick strata of soft cohesive soils, a method of foundation soil improvement is generally required to prevent bearing capacity failure and/or to avoid excessive total and differential settlements.These soft soils have a Prefabricated vertical drain (PVD) very low bearing capacity due to their saturated state; the PVDs are used to increase the bearing capacity of the soil by removing the excessive water present inside. a
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