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Erosion control and slope vegetation at Kolaghat Bridge, near Kolkata, West Bengal



control of erosion on slopes and vegetation using TENAX GEOMATS




Kolaghat Bridge: Km 72

March, 2013

Ashoka Buildcon Ltd

Independent Engineer:
AARVE Associates
Design Consultants:
EPC Contractor:
Dinesh Chandra & Co
HMBS Textiles Pvt Ltd
National Highway Authority of India
Designed in accordance with IRC 56:2011



installation of TENAX Geomats for erosion control and slope vegetation

Installation of TENAX Multimat 30 Geomat with
Plastic L Pins;
service Road work going on without any hindrance.





Project description

Kolaghat is an Indian town situated on the banks of the Rupnarayan River in the Midnapore East district of West Bengal.

The Kolaghat Bridge (namely Sarat Setu) is a 30 year old bridge built in the year 1980 and situated on the river providing the main East-West highway connection across India.

Owing to its important connection the highway is being extended to hold six lanes on each side.


To limit the land usage, the resulting embankments on either side of the carriageway have been steepened to inclinations of 1 in 1.5 slopes.

The traditional solution for erosion control on these slopes was to provide “stone pitching” to the surfaces.


example of stone pitched slope

Example of stone pitched slope.


However, the use of Tenax Multimat Geomats (as per IRC 56) has enabled a 50-60% saving in overall costs against stone pitching with remarkable results.


erosion control and slope vegetation using TENAX geomats

control of erosion and vegetation on slopes embankment using TENAX geomats

Final Dressing with seeding over TENAX Multimat with Cohesive/Good Earth and the slope completely vegetated.





Erosion control and slope vegetation at Kolaghat Bridge, West Bengal




Slopes with vegetative matrix

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