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DRAINAGE FILTER

 

Where applicable

Sometime road fails due to improper drainage particularly in the hills, where space is a problem as well as in the congested city areas. In such cases concealed drain using jute filter by the side of the road as well as across the road helps drain out the water.

The approach of bridge and flyovers, when filled with fly-ash or similar fine materials, filtration of the fines is a problem, application of granular filter is expensive and it may be replaced partially by jute filter to reduce cost.

Why applied

   Saves time, space and money.
   Easy construction and handling
 
Product specification
 

Code

Weight
(gsm)

Width
(cm)

Thickness
(mm)
Pore size AOS
(micron)

Strength
(kN/m)

Elongation 
at break (%)

Water Permittivity
(m/sec.)

MD CD MD CD
BGN 500 500 150
(max)
4 300 4 5 20 25 3*10-4
BGN 1000 1000 150
(max)
8 200 7 8 25 30 4*10-4


How to apply

Excavate earth according to the size of the drain to be constructed. Lay the fabric covering bottom, sides and extra fabric for over lapping as shown in the plan. Put rubbles of suitable size and cover with the fabric.

Filtration of fine material may be carried replacing a portion of granular filter by the fabrics.

After degradation of strength the filtration continues until it is disturbed.
 

Plan of Installation of Jute Geotextile for Construction of Concealed Drains

 
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