Initially, a site survey was carried out in detail. Then, design and site specific construction drawings of TechRevetment® mattress system were prepared.
TechRevetment® solution consists of one layer of non-woven geotextile, then laying of Filter Point fabric form concrete mattress and fine aggregate concrete pumped into the fabric form. The TechRevetment® was installed over the embankment of the bund at not more than 1:1 slope.
After studying the geotechnical and hydrological data of the location, Terre Armée in India decided to use Filter Point (FP) 400 mattress for the application. FP 400 is a 100mm thick (nominal) woven double layer synthetic fabric made of polyester with nominal mass per unit area of 500 gms/sq m and shear resistance of minimum of 100 kg/sq m. The mattress also has filter points at specified intervals to release water pressure. After concreting, this mattress acts as a single unit / mass providing better stability to the embankment.
The project took off in the presence of senior government officials.
Terre Armée in India initially completed a 56m pilot stretch in 36 hours. Later, a 1.2 km stretch was executed in 15 days’ time.
The installation took place under guidelines of experienced engineers of Terre Armée in India.
For underwater installation, divers were used to hold back the fabric form mattress.