Transcript EROSION CONTROL APPLICATIONS USING GEO

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APPLICATIONS OF GEO-SYNTHETICS IN
EROSION CONTROL
GARWARE – WALL ROPES LTD.
Geo-synthetics Division
GWRL- An ISO 9001 2000 Company
© 2011 GARWARE-WALL ROPES LTD. ALL RIGHTS RESERVED
SOIL EROSION

Soil erosion is a natural process which occurs due to
detachment and movement of top soil by the action of wind
and flowing water

Natural turfing does not provide required superior
performance

Erosion control measures:
 Garmat® on Slopes upto 45º
 Geocell on Slopes upto 80º
GWRL- An ISO 9001 2000 Company
© 2011 GARWARE-WALL ROPES LTD. ALL RIGHTS RESERVED
GARMAT®
• High performance product specially engineered as
surface protection treatment for slopes
• Garmat® is a composite geomat comprising a layer of biodegradable mulching material sandwiched between two
layers of polymer netting
Garmat®
GWRL- An ISO 9001 2000 Company
Pre-cultivation on Garmat®
© 2011 GARWARE-WALL ROPES LTD. ALL RIGHTS RESERVED
SPECIFICATIONS OF GARMAT®
SPECIFICATION OF GARMAT®
PROPERTY
Top and bottom layers of polymer net
Material and structure
Polymer netting comprising tensile elements of circular
cross-section in two orthogonal direction with knotless joint
Aperture size
25 ( 4) mm x 25 ( 4) mm
Tensile strength
≥ 2.0 kN/m (in both directions)
UV Stability (Percent
retention of tensile strength)
≥ 80% (500 hours exposure)
Type of joint
Firm Joint
Middle layer of bio-degradable mulch
Material
Coir fibre
Weight
≥ 250 gms/m2
Thickness
≥ 6.5 mm
Dimensions
Length
15 m (depending on site requirement)
Width
5 m (minimum)
GWRL- An ISO 9001 2000 Company
© 2011 GARWARE-WALL ROPES LTD. ALL RIGHTS RESERVED
ADVANTAGES OF GARMAT®
• Promotes growth of vegetation by retaining moisture
and conditioning the soil
• Root system interwined with the net binds and confines
the soil
• Results in higher root density of grass cover upto (4500
kg/ha) compared to ordinary turfing (typically 1500
kg/ha)
• Mulch in the Garmat® acts as porous filter to allow water
while retaining soil
• Installation is simple and easier
GWRL- An ISO 9001 2000 Company
© 2011 GARWARE-WALL ROPES LTD. ALL RIGHTS RESERVED
POND 1-HINDUSTAN ZINC LIMITED, VIZAG, A.P.
Garmat® Installed on Embankment Slopes
View of Jarosite Pond with Garmat® Installed on Embankment Slopes
GWRL- An ISO 9001 2000 Company
© 2011 GARWARE-WALL ROPES LTD. ALL RIGHTS RESERVED
POND 2-HINDUSTAN ZINC LIMITED, VIZAG, A.P.
Garmat® Installed on Embankment Slopes
View of Jarosite Pond 2 with Garmat® Installed on Embankment
Slopes
GWRL- An ISO 9001 2000 Company
© 2011 GARWARE-WALL ROPES LTD. ALL RIGHTS RESERVED
MINERAL ENTERPRISES LTD, CHITRADURGA
After installation of Garmat® on embankment slopes
Growing of vegetation on embankment slopes
GWRL- An ISO 9001 2000 Company
© 2011 GARWARE-WALL ROPES LTD. ALL RIGHTS RESERVED
MAHANADI COAL FIELDS, TALCHER, ORISSA
Before
GWRL- An ISO 9001 2000 Company
After
© 2011 GARWARE-WALL ROPES LTD. ALL RIGHTS RESERVED
MAHANADI COAL FIELDS, TALCHER, ORISSA
Slope Surface Preparation for Installation of Garmat®
Garmat® Installed for Erosion control
GWRL- An ISO 9001 2000 Company
© 2011 GARWARE-WALL ROPES LTD. ALL RIGHTS RESERVED
UDHAMPUR - MUKTHESWAR SECTION,
NORTHERN RAILWAY
Garmat® Installed on Slopes
After vegetation growth on slopes
GWRL- An ISO 9001 2000 Company
© 2011 GARWARE-WALL ROPES LTD. ALL RIGHTS RESERVED
KUNDLI - MANESAR HIGHWAY, HARYANA
Rain cuts on slope – before installation of Garmat®
Surface preparation in progress for
®
installation
of Garmat
Watering
in
progress
Compaction
of slopes in progress
GWRL- An ISO 9001 2000 Company
© 2011 GARWARE-WALL ROPES LTD. ALL RIGHTS RESERVED
KUNDLI - MANESAR HIGHWAY, HARYANA
Installation of Garmat® and soil placement in progress
After vegetation growth on embankment slope
GWRL- An ISO 9001 2000 Company
© 2011 GARWARE-WALL ROPES LTD. ALL RIGHTS RESERVED
GRIL NH - 24, EXPRESSWAY PROJECT,
MORADABAD
Installation of Garmat® in progress
After vegetation growth on embankment slope
GWRL- An ISO 9001 2000 Company
© 2011 GARWARE-WALL ROPES LTD. ALL RIGHTS RESERVED
GEOCELL

Geocell is a lightweight, expandable cellular
confinement system which creates an erosion barrier or
structural foundation

Effective erosion control measure on steep slopes
GWRL- An ISO 9001 2000 Company
© 2011 GARWARE-WALL ROPES LTD. ALL RIGHTS RESERVED
GEOCELL

Fill materials:
- Soil (both cohesion and cohesionless)
- Aggregates
- Concrete
GWRL- An ISO 9001 2000 Company
© 2011 GARWARE-WALL ROPES LTD. ALL RIGHTS RESERVED
APPLICATIONS OF GEOCELL
Erosion protection
Slope Stabilization
Stream / channel protection
GWRL- An ISO 9001 2000 Company
Retaining wall
Access Roads/Railroad Ballast
© 2011 GARWARE-WALL ROPES LTD. ALL RIGHTS RESERVED
APPLICATIONS OF GEOCELL
With GEOCELL
Without GEOCELL
Erosion Control
GWRL- An ISO 9001 2000 Company
Embankment Protection (flood)
© 2011 GARWARE-WALL ROPES LTD. ALL RIGHTS RESERVED
SPECIFICATIONS OF GEOCELL
 Cell density (cells/m2):
8.3, 12, 16.5, 21.7, 27.6, 34.3, 41.7
 Cell height (mm): 50, 75, 100, 150, 200
 Cell wall type: smooth, textured, perforated
 Colors: black, tan, green and others
 Perforations: percentages can be varied up to 16.5%
GWRL- An ISO 9001 2000 Company
© 2011 GARWARE-WALL ROPES LTD. ALL RIGHTS RESERVED
THANK YOU
Tiru Kulkarni
Vice President, Geosynthetics Division,
Garware-Wall Ropes Ltd.
Plot No. 11, Block D-1, M.I.D.C. Chinchwad, Pune- 411019, India.
Phone: + 91-20-30780000, 30780432
Fax: + 91-20-30780350.
Email : [email protected]
[email protected]
Website : www.garwareropes.com
GWRL- An ISO 9001 2000 Company
© 2011 GARWARE-WALL ROPES LTD. ALL RIGHTS RESERVED