Flood Prevention of Pahumara River in Bajali District, PACKAGE 1 RETENDER

Amount

Supply of geo-textile Tube (Mega containers) of fill height of 2.5 m and 25 m length made of geo-textile with minimum properties as mentioned below. i. Tensile strength of geo-textile materials > 200kN/m ii. O95 (pore size) of the geo-textile materials < 180 microns. iii. Seam strength > 70% of the material tensile strength. iv. Elongation of the material at the ultimate tensile strength should not be more than 20% v. CBR Burst Strength > 10.5 vi. Abrasion resistance (BAW Rotating Drum) >75% of strength retained. vii. UV Resistance (ASTMD4355-500Hrs) > 80% of strength retained. viii. The geo-textile mega containers must resist the pressure created by stacking the tubes in 3:2:1 manner.

Filling of geotubes (25m long and 2.5m filled ht.) with sand by using mud pump as per drawing and technical specification, binding the tube with 9mm nylon rope to jati bamboo pegs of length 2m placed 2.5m c/c along both sides of the tube and at both ends to keep the tube in position during filling, as specified and directed including all loading, unloading and handling charges and local carriage upto a distance of 250M, etc., complete as directed

Earth work in excavation by hydraulic excavator, to proper grade and slopes as required including utilizing the spoils for filling works in the vicinity including removing roots & vegetation, dressing to design section etc. complete as directed. Ordinary Soil, For depth up to 3.00 m

Earth work in embankment by mechanical means by truck carriage in ordinary/normal soil excluding sandy and rocky soil free from roots & vegetation and stacking in regular measurable stacks at suitable places including clearing debris, breaking clods up to 4 cm cube, excluding payment of forest royalty if any, etc. (12.50 % deduction will be made from measured quantities on account of shrinkage).

Spreading of earth stacks over the crest and slope of embankment and places as directed in uniform layer of 22 cm. thick including breaking clods, dressing, ramming etc. complete where necessary including dressing of the embankment, etc. complete as directed.

Prasanta Bayan