GEOSYNTHETICS

INTRODUCTION

Geosynthetics is the term used to describe a range of generally polymeric

products used to solve civil engineering problems. The term is generally

regarded to encompass eight main product

categories: geotextiles, geogrids, geonets, geomembranes, geosynthetic clay

liners, geofoam, geocells and geocomposites. The polymeric nature of the

products makes them suitable for use in the ground where high levels of

durability are required. Properly formulated, however, they can also be used in

exposed applications. Geosynthetics are available in a wide range of forms and

materials, each to suit a slightly different end use.

These products have a wide range of applications and are currently used in

many civil, geotechnical, transportation, geoenvironmental, hydraulic, and

private development applications

including roads, airfields, railroads, embankments, retaining

structures, reservoirs, canals, dams, erosion control, sediment

control, landfill liners, landfill covers, mining, aquaculture and agriculture.

• Separation

• Filtration

• Reinforcement

• Drainage

• Containment

GEO TEXTILE

Geotextiles are permeable fabrics which, when used in association with soil, have the ability to separate, filter, reinforce, protect, or drain.

Usually geotextiles are placed at the tension surface to strengthen the soil. Geotextiles are also used for sand dune armoring to protect upland coastal property from storm surge, wave action and flooding. A large sand-filled container (SFC) within the dune system prevents storm erosion from proceeding beyond the SFC. Using a sloped unit rather than a single tube eliminates damaging scour.

Geotextile sand-filled units provide a "soft" armoring solution for upland property protection. Geotextilesare used as matting to stabilize flow in stream channels and swales.

Geotextiles can improve soil strength at a lower cost than conventional soil nailing. In addition, geotextilesallow planting on steep slopes, further securing the slope.

Geotextiles have been used to protect the fossil hominid footprints of Laetoli in Tanzania from erosion, rain, and tree roots

In building demolition, geotextile fabrics in combination with steel wire fencing can contain explosive debris

Geogrids (Uniaxial &Biaxial)

GeotextilesWoven

GeosyntheticClay Liners

Nonwoven

GeomembranesGeonet

Woven Geotextile - Separator (Thane, Mumbai)

WOVEN GEOTEXTILES

Geogrid Wraparound Wall at CH. 48 KM & CH. 50 KM,Lucknow - Muzaffarpur National Highway Project

Filter - Woven geotextiles

Separator - Approach Embankment for Bridge across Vasista, Godavari at Chinchinada, A.P. (N H 5A)3

Reinforcement, Vishakapatnam Airport, Andhra Pradesh

WOVEN GEOTEXTILES

M.Venkataraman, GWRL.

GEOTEXTILE TUBE - SHORE PROTECTION

Geotextile Tube

HWL

Geotextile BagsWoven Geotextile

Shore Protection Works :

Shankarpur to Halda, West Bengal, India

WOVEN GEOTEXTILES

Filter Material

Geotextile Bags – Toe ProtectionGeotextile Tube

Geotextile Bags

Geotextile Tube

After installation - During High Tide

NONWOVEN GEOTEXTILES

Protection Layer,Doodhganga Canal Project, Kolhapur, Maharashtra

Lining of Dry Gypsum Pond, Coromandal Fertilizers Ltd.,Vishakapatnam

NONWOVEN GEOTEXTILES

Protection Layer in Landfills, HZL, Visakhapatnam, A.P

Tensar® Geogrid Reinforced Soil Wall System at CSEB,– Inner Side View, towards deck slab (Korba, India)

UNIAXIAL GEOGRIDS

RS Wall with Gabion Facia and Geogrid as reinforcement at Bellary, Karnataka)

Geogrid Wraparound Wall at CH. 48 KM & CH. 50 KM,Lucknow - Muzaffarpur National Highway Project

UNIAXIAL GEOGRIDS

Installation of Tensar SSLA30 Biaxial Geogrid atballast level (Kazipet-Ballarshah section,, SouthCentral Railway)

Subgrade Stabilization using Tensar Biaxial GeogridsTalasari - Udhava Major Dist. Road, PWD, Maharashtra

BIAXIAL GEOGRIDS

BIAXIAL GEOGRIDS

Ground Improvement for Tank Foundation, HPCL, Mundra, Gujarat

Reservoir Lining, Finolex Industries, Maharashtra Doodhganga Canal Project(Kolhapur, Maharashtra)

HDPE GEOMEMBRANE

Lining of Dry Gypsum Pond, Coromandal Fertilizers Ltd.,Vishakapatnam

HDPE GEOMEMBRANE

Landfill, HZL Visakhapatnam, A.P

PCMC Landfill, Pune

M.Venkataraman, GWRL.

GEOGRIDS IN PAVEMENTS

• Properties Influencing Effective Performance of the Product

Rib Thickness & Shape

Aperture Size & Shape