Protection of Dakhin Gandhibari from the Erosion of River Borolia under

Amount

Geo Bag Protection Work:

Earth work in bank trimming to the designed section /slope by manual means including removing the trimmed soil to a minimum distance of 30 m lift complete as directed.

Supply of Geo–textile bags of type-A (1.03M x 0.70M) made of Geo- textile non-woven fabric sheets of 400 GSM manufactured from 100% virgin Polypropylene (PP) fibre with minimum properties as (i) Tensile strength > 12.4 KN/m (ii) Mass > 400.00 Gm/m2 (iii) CBR Puncture strength > 1550N?m 2 (iv) Elongation @ break (Warp) > 54% (v) Elongation @ break (Weft)> 52% (vi) Abrasion > 70% (vii) UV Resistance @ 500 hours > 70% (vii) AOS < &% MICRON (ix) Permittivity > 1.25, (x) Trapezoidal Tear Strength < 340 N (xi) Permeability = 2.00 x 10-3 m/sec (xii) Seam Strength = 80% of geo textiles strength. Stitching of Bags should be Ring Spun Yarn stitches with 2500-3000 denier double line chain stitch with overlap with stitches along the edge @ minimum 15 stitches per 100mm. (Bags are to be supplied of 100 numbers of part in a bundle, properly packed with name of Manufacturer and Batch number is to be marked on each bag with “WRD Govt of Assam” to be printed on each bag and mentioning properly the GSM and type of Geo bag polymer. Test Certificate from approved NABL accredited and ISO certified Laboratory should invariably be submitted against each bag of material).

Supply of Galvd. WN Sheet made of 8G wire of 152 sq mesh in sheet overall size 2.57m x 1.60 m incl. projection of each wire on all sides beyond the net size of 2.42m x 1.51m incl. loading, unloading and stacking properly complete as directed by Deptt. Wt. of each sheet should not be less than 6.30Kg.

Filling and laying in cage with sand / silt filled Geo Begs of size 1.03 x 0.70 M including excavation of sand/ silt from flood plain or adjacent char with in a distance of 90 M from the work site and filling with sand/silt , having minimum weighing 126 KG and minimum volume 0.084 Cum after filling . double locking chain Stitching the mouth of the filled bags with Polypropylene thread by power driven double needle machine stacking the same in batches of 100 carrying the same to the dumping site including all handling charges and any local carriage within a distance of 150 M and laying properly in cages made of wire 2.57x1.66m of 8G galved wire making the cage from 2nos of wire netting sheets by tying the projected wire complete as directed (Geo bags, wire netting sheet and Polypropylene thread will be supplied by the Deptt. free of cost ). Without boat

Filling and laying Geo Begs of size 1.03 x 0.70 M including excavation of sand/ silt of size more than 80 micron from flood plain or adjacent char within a distance of 90 M from the work site and filling with sand / silt, having minimum weighing 126 KG and minimum volume 0.084 Cum. after filling double locking chain stitching the mouth of the filled bags with Polypropylene thread by power driven double needle machine stacking the same in batches of 100 carrying the same to the dumping site including all handling charges and any local carriage within a distance of 150 M and laying properly as directed (Geo bags and Polypropylene thread will be supplied by the Deptt. free of cost )

Supply of Geo–textile bags of type-B (2.00M x 1.50M) inner dimension made of composite layers of Geo textile as per specification bellow : Woven Geo- textile for the outer cover. The woven Geo textile is woven with MAVR values of the following properties . Geo textile used to manufacture Geo textile bags should have high mechanical properties for enhanced durability along with enhanced puncture, abrasion and U.V. resistance characteristics. Geo textile should be inert to biological degradation and resistant to naturally encountered chemicals , alkalis, and acids. Weight (ISO-9864/ASTMD-5261) 250Gms/Sq.m, Tensile strength (MD) (ASTMD-4595) 35 KN/M, Tensile strength (CD) (ASTMD-4595) 35 KN/M, Tensile elongation (ASTMD-4632)5% & 30%, Tensile strength (ASTMD- 4632)= 1.5 KN. UV resistance (ASTMD- 4355)= 70%/500Hrs non woven Geo textile for the inner layer. It is needle punched non woven Geo textile 100% polypropylene staple fibers which are formed into a random network for dimensional stability. It should resist UV degradation, rotting and alkalis. Weight ( ISO-9864/ASTMD 5261)300Gms/Sq.m, Tensile strength (MD) (ASTMD 4595) 12KN/m Tensile strength (CD) (ASTMD 4595) 12KN/m , Tensile elongation (ASTMD 4595) 5% & 30%, Grab elongation (ASTMD 4632) 5% & 30%, Tensile strength ( ASTMD 4632)= 1.5 KN , UV resistance ( ASTMD 4355) = 70%/ 500Hrs ( Bags to be supplied 100 numbers or part in bundle , properly packed with the name of Manufacturer and Batch number is to be marked on each bag with “WRD Govt of Assam” to be printed on each bag and mentioning properly the GSM and type of Geo bag polymer. Test Certificate from approved NABL accredited and ISO certified Laboratory should invariably be submitted against each bag of material).For Guwahati

Geo Bag Protection Work:

Filling and laying of nonwoven Geo textile bags of dimension 2.00m x 1.50m including excavation of silt from flood plain or adjacent char with in a distance of 90 M from the work site and filling with silt having minimum volume 0.612Cub.M after filling double locking chain stitching the mouth of the filled bags with Polypropylene thread by power driven double needle machine laying at proper site including all handling charges and any local carriage within a distance of 100 M complete as directed (Geo bags and Polypropylene thread will be supplied by the Deptt. free of cost). Without boat

Supply of sewing threads for Geo bags to meet 4 rows of type 101 stitch on the top/open end of bag after filling the materials and specification etc. complete as directed. (Inclusive of 1% labour cess)

Construction of whole bamboo double screen with matured Bhaluka bamboo stacks 75mm to 100mm dia, placed 30 cm clear apart ( i.e. 40cmc/c ) driven 4.00m to 4.50m bellow ground and 3.00m to 3.50m above with hydraulic driving equipments including hire charges of equipments, cost of POL, etc. and providing with 1 (row) of horizontal half jati bamboo kamies tied with galvd. Wire of 16G to 18G etc. complete as directed (Using Bhaluka bamboo ( at the rate of 240.00 nos /RM & Jati Bamboo at the rate of 9.60 nos /Rm )

BHARAT BORO (BID ID -258333)