GEOTECHNICAL SOLUTIONS

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Gabions

Gabion Baskets consist of Square or rectangular cells, and are made of hexagonal mesh from Low Carbon, heavily galvanized or Galfan coated wire. The Gabions, wire quality and the Coating for Corrosion protection meet international Standards, specifications such as ASTM, EN, SABS etc.
The wire mesh gabions are formed by weaving adjacent strands of wire by wisting them through one and a half turns at intervals, forming a hexagonal shaped mesh. The ends of the mesh wires are wrapped around a heavier transverse edge wire to form the panels. The tensile strength of the mesh in the direction of the weave is greater than across the weave.
The mesh gabion box is manufactured from a main panel that forms the face, base, near and lid of the unit. The mesh panels are reinforced at the edges with wires of a larger diameter (usually called selvedge wire), to strengthen the structure. Gabions are divided into cells by cells called diaphragms/partitions, these partitions help in the reinforcement of the Gabion Structure & help during the filling of stones during assembly. The side panels and diaphragms are then jointed to the base section of the main panel. The unit is then folded flat for transportation.
On site, the unit can be opened out into the required position and the sides, diaphragm and end panels are by a continuous lacing operation with the wire supplied or with 'C' rings to form the Gabion.
Once assembled the mesh gabions are filled with stone or rock as per our prescribed procedure to form a stable structure.

Applications:
  • Maraine & Hydraulic Structures
  • Retaining Walls
  • River Training
  • Soil Erosion Protection
  • Highways Protections
  • Production of Electrical Towers
  • Transmission Towers
  • Communication Towers
  • Protection of Islands
  • Coastal Embarkments
  • Recharge Dams
  • Channel & Cannal Lining Work
  • & more
Advantages:
  • Flexible
  • Permeable
  • Durable
  • Ecologically Friendly & Strength
  • Cost Effective
  • Time Saving
  • & more
Corrosion Protection:

The wire used in manufacture of Gabion includes corrosion [protection of wire by way of Zinc Coating (galvanizing) of Galfan Coating usually according to EN10244-2 Table II Class A or other international standards.
Additional Corrosion protection is sometimes required for harsh / sultry / wet conditions. In such cases, wire, prior to manufacturing the mesh, is coated with a special PVC, PP or PA coating as per EN10245 to enhance corrosion protection of the Gabions and the Structure. Better protection against possible corrosion is obtained so the gabions become more suitable for use in marine or polluted environments.
Gabions used for various applications including retaining walls, mechanically stabilized earth structures, bank protection, slope protection, weirs, drop structures etc., gabions manufactured with such technology can have a life of up to 120years.

Specifications:

Mesh Openings : 60X80mm, 80X100mm, 100x120mm (As per BS EN10223-3)
Wire Diameter : Ranging from 2.00mm to 3.2mm (As per BS EN10218-2, BS EN10223-3)
Corrosion Protection: Galvanized Wire, Galfan Coated Wire with additional option of Poly-Organic Coatings.
Stainless Steel Grade SS 304 & SS 316 Options are also available for highly corrosive environments requiring a high degree of corrosion protection.



Mattresses

Gabion mattresses are box units where typical standard sizes are 3 or 6m long & 1 or 2 m wide. Height of each unit is less than 0.5m and subdivided into compartments. Each compartment or cell so formed has an area of 2mx1m or 2mx2m in plan.
Manufactured in similar construction as that of Gabions, the mesh Sizes of Mattresses usually are 60x80mm and supplied with Zinc or Galfan coatings, with or without additional PVC coating for additional corrosion protection.
The mattresses are usually used for Riverbeds and channel lining for Erosion protection and are also used to provide under scour protection to retaining structures.

Specifications:

Mesh Openings : 60X80mm, 80X100mm (As per BS EN10223-3)
Wire Diameter : Ranging from 2.00mm to 2.7mm As per BS EN10218-2, BS EN10223-3
Corrosion Protection: Galvanized Wire, Galfan Coated Wire conforming to EN 10244-2 Class A and additional option of Poly-Organic Coatings as per EN 10245.
Stainless Steel Grade SS 304 & SS 316 Options are also available for highly corrosive environments requiring a high degree of corrosion protection.
Product confirming to other specifications can also be provided based on specific requirements.

Applications:
  • Maraine & Hydraulic Structures
  • Retaining Walls
  • River Training
  • Soil Erosion Protection
  • Highways Protections
  • Production of Electrical Towers
  • Transmission Towers
  • Communication Towers
  • Protection of Islands
  • Coastal Embarkments
  • Recharge Dams
  • Channel & Cannal Lining Work
  • & more
Advantages:
  • Flexible
  • Permeable
  • Durable
  • Ecologically Friendly & Strength
  • Cost Effective
  • Time Saving
  • & more

Sac Gabions

Sac or Cylindrical gabions are made from hexagonal wire mesh consisting of mesh twisted around in a cylindrical form & laced.
The Cylindrical core of the Sac gabions are filled on land & then placed on site for speedy installation / construction. Usually used to build dykes & groynes, they are also used to regulate water flow & for marine structures.





Slope/Rockfall Protection Netting

An economic and efficient solution for slope stabilization is to use protector gabion mattresses. Various structural modifications can be implemented, depending on the nature of the slope.
A wide range of mesh fabric is available to solve each specific problem. The netting can be used in both single and double layers, and also can be reinforced with cables and vertical, flexible catch fences. Further vegetation can therefore be encouraged to grow, thus stabilizing the loose soil and rocks.
The mesh for rockfall protection is manufactured to the same standards as gabion mesh and can be supplied in a full range of mesh sizes and diameters to suit the size and weight of debris expected.
Anchors should be used to keep the mesh close to the rock face. The optimum spacing therefore varies for each rock face. Details at the toe of the rock face should be carefully considered so that any debris reaching the toe does not cause damage.
If desired, the mesh can be secured both at the top of the slope and at the foot of the slope with high strength cables. In this instance it is good practice to allow the lower cable to be loosened, in order that the collected debris can be removed safely.
The mesh is made of heavily zinc coated, Galfan, Heavy Zinc+PVC or Galfan+PVC coated double twisted steel woven wire. Due to the characteristics of double twist, the steel wire netting can withstand the force of falling rocks without unraveling in the event of wire breakage.
In addition Gabion walls can be constructed at the toe of cliffs to protect roads, railways, buildings or other important infrastructure from falling rocks. Alternatively rolls of mesh supplied byLINK MIDDLE EASTcan be laid down the cliff face to prevent rocks falling.