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Geomembrane

A geomembrane is a very low permeability synthetic membrane liner or barrier commonly used to control fluid (or gas) migration in a human-made project, structure, or system.

The use of membranes in civil and environmental applications is becoming more widespread as there develops a greater understanding of the effects of contaminated ground conditions on structures and the environment. Shivsequoia International are able to offer a wide range of membranes that are compatible with the diverse range of applications and contaminants likely to be encountered. Shivsequoia International are able to advise on the most appropriate product for each specific application and geomembranes are supplied as High Density Polyethylene geomembranes(HDPE), Linear Low Density Polyethylene geomembranes (LLDPE) and Low Density Polyethylene geomembranes (LDPE).

Common Applications of Geomembranes:

Waste water treatment facilities
Landfill caps /closures
Potable water reservoirs
Tank linings
Dam/ Pond liners
Floating covers
Solutions ponds for mining
Retention ponds
Storage tanks

Geotextiles

Geotextiles are permeable fabrics, made from either polypropylene or polyester. When used in several different applications, mainly associated with soil, geotextiles have the ability to separate, filter, reinforce, protect, or drain. Geotextile fabrics come in three basic forms: nonwoven geotextiles, woven geotextiles (needle punched), or heat bonded geotextiles (structural woven).

To provide effective filtration, drainage and separation of engineering materials in a variety of construction structures associated with a range of transportation and associated infrastructure activities, the use of geotextiles has gained tremendous acceptance over the last 30 years. Geotextile materials, when selected appropriately, allow for the replacement of traditional granular filter and drainage layers, providing a significant environmental and economic benefit.

Geotextiles are a relatively inexpensive product, that when designed and installed correctly can replace traditional granular treatments with significant cost savings, both in aggregate quantities used and traditional labour costs to install such aggregate systems.

Common Applications of Geotextiles

Drainage: Geotextiles will efficiently collect surplus water from structures, such as rainwater or surplus water, from the soil and discharge it.
Filtration: Our geotextiles provide superior hydraulic flow and soil retention, which makes them well suited for filtration in subsurface drainage applications and under hard armour systems.
Separation: Geotextiles are used for paved and unpaved roads, where ground conditions have been compromised. As a separation layer, geotextiles can aid preventing the intermixing of dissimilar materials, add to the performance life of the road and reduce the overall thickness of the road section by requiring less aggregate during construction.
Reinforcement: High strength geotextiles can be used to reinforce earth structures as the strength of the tape or filament within the fabric may be increased to suit a specific application. Thanks to their high tensile strength they are an ideal reinforcement solution.
Protection: Due to the consistent thickness and weight of our Geotextiles, they provide adequate cushioning and protection for critical lining systems

Geogrids

Geogrids are geosynthetic material made from polypropylene, polyethylene or polyester. They are used in several civil engineering related applications to provide ground reinforcement.

Shivsequoia geogrids are manufactured from the extrusion, weaving or welding of a polymer to form open aperture products of varying strength, strain and load carrying capability for applications of soil reinforcement. Generally geogrids have a primary strength in one direction only (uniaxial geogrids) although in certain applications the strength may be equal in both directions of the product (biaxial geogrids). Geogrids work by interlocking with the granular or soil material placed over them. The open apertures of the geogrid allows for confinement of the material within, thereby increasing the shear strength of such materials.

Common Applications for Geogrids

Shivsequoia biaxial geogrids are designed to interlock with soil and aggregate and are ideal for applications such as:

Base and subgrade reinforcement
Construction of unpaved and paved roads

Shivsequoia uniaxial geogrids are designed to provide long term design strength and are ideal for applications such as:

Reinforced slopes
Embankments

Base/Subgrade & Rail Ballast Reinforcement – Challenging ground foundations within both the roads and railways corridors is extremely common and can lead to deep and expensive treatment remedies without geosynthetics. Global Synthetics has an extensive range of high strength and durable geogrids / geocomposite products (made from Polypropylene (PP) or Polyester (PET)) for subgrade stabilisation on soft and expansive subgrades and stiffening of road and railway asset structural layers.

Geogrid reinforcement provides interlocking with gravel, rock and ballast materials to confine the lateral movements in the overlying structural layers and in most cases can provide up to 30% reduction in depth. Furthermore, geocomposite products with a non-woven geotextile offer the additional benefits of separation and filtration benefits coupled with the stiffness and strength of a geogrid for gravel reinforcement and stabilisation of trafficked areas. Ultimately, creating a sound working platform needed for compaction, improving the subgrade bearing capacity, stiffening the gravel structural layers, controlling differential settlement, reducing the risk of cracks and deformations/rutting.