Protection of Dasamowa area from the erosion of river Dhansiri under SOPD (G) 2019-20 (Package 2)

Amount

Earth work in babk trimming to the desined section /slope including removing the soils at a safe distance, complete as directed.

Supply of G-mat in double layered composit Geo-textile febricatedb to form a three dimensional mattreses, the upper layer of the matress being heavily woven with pp fabric neele-punctured with a mixture of UV stabilised green fiber and cut type yarns with upper layer properties as:i)Mass per unit area=650gsm.ii) Tensile strength ≥ 70.0 KN/m. iii)Tensile strength (CD) ≥ 70.0 KN/m. iv)Tensile elongation(CD)≤25%.vi) Pore size<0.35mm. vii)Abrasion resistance≥ 35%. (viii) UV Resistance @ 500 hours ≥ 90%. ix) resistance to oxidation @100˚ C (for 28 days)≥ 80.0 %. The sewing threads should be of hightenacity polymer and perallel sitches are to be continuedpositions at350mm apartwith a stitch length not exceding 5 mm.(each roll of geo mat should be supplied in properly packed bundles and should be marked with the name of manufacture & batch number clearly on each bundle with “WRD Govt.of Assam” to be printed on it and mentioned properly the GSM and type of polymer and test certificate from appvd.NABL accredited and ISO certificate laboratory should be invariably be submitted a gainst each batch of material FOR GUWAHATI

Supply of Geo Bags Type-B (Size 2.00m x 1.50m)( pillow Type) made of composite layers of geo- textile as per specifications below : Woven Geo-textile for the outer cover. The woven geo textile is woven with UV resistant slit film tape fibre 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. v Weight (ISO-9864/ASTMD 5261) ≥300 Gms/Sqm. v Tensile strength(MD) ( ASTMD 4595) = ≥35 kN/m v Tensile strength(CD) ( ASTMD 4595) = ≥35 kN/m v Tensile Elongation ( ASTMD 4595)= ≥5% & ≤30% v Grab Elongation ( ASTMD 4632)= ≥5% & ≤30% v Tensile strength ( ASTMD 4632) = 1.5 KN v UV resistance( ASTMD 4355) = 70%/500 hrs Non woven Geo-textile for the inner layer It is needle punched non woven geo-textile made of 100% polypropylene staple fibers which are formed into a random network for dimensional stability. It should resist UV degradation, rotting and alkalis. v Weight (ISO-9864/ASTMD 5261) ≥250 Gms/Sqm. v Tensile strength(MD) ( ASTMD 4595) = ≥12 kN/m v Tensile strength(CD) ( ASTMD 4595) = ≥12 kN/m v Tensile Elongation ( ASTMD 4595)= ≥5% & ≤30% v Grab Elongation ( ASTMD 4632)= ≥5% & ≤30% v Tensile strength ( ASTMD 4632) = 1.5 KN v UV resistance( ASTMD 4355) = 70%/500 hrs (Bags are to be supplied of 100 numbers or 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 batch of material).

Supply of Sewing Thread Yam PPMF Stitching Thread(2000 Den Kapion) i/e Payment of taxes.

labour charge for laying,fitting & fixing of double layered Geo-matress fabricated to form three dimensional matreses after filling sand at a designed slope, filled up with pump,anchoring by cutting trench at the upper & lower end of the slope of depth 1m x 0.75m,placing the mat by bending it into the trench.filling the trench by earth filled cement bags,side of matress in sloping direction stiched by polester/poleypropylene thread with double locking chain stich not less than 3 stitches per 2.50 cm to achieve minimum stream strength including all handling & cariage charge complete as directed.(Polepropylene thread will be supplied by the department free of cost).

Filling and laying of nonwoven Geo Bags (Size 2.00m x 1.50m) including excavation of specified silt from flood plain or adjacent chars within a distance of 90M of the work site, filling geo bags with silt,having minimum volume 0.612 cum 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 local carriage within a distance of 100m complete as directed. ( Geo Bag and Polypropylene thread will be supplied by the department free of cost). Withboat.

Earth work in excavation of drainage channel to the proper grade and slopes as required including depositing the excavated debries/ soil to a safe distance of minimum 50 m distance as directed.

Supply of serviceable empty cement bags.

Labour charge for laying and pitching earth filled cement bags including excavation and borrowing earth breaking clods, filling in bags and supplying and stitching the mouth with jute sutli, etc. complete as directed. (cement bags will be supplied by the department free of cost).

Collection and supply of sand from approved quarry of specified grade by truck carriage free from debries and other foreign material including payment of forest royality/sales tax etc. (For initial lead beyond 1/2 km and upto 4.00 km for all lifts.)

Carriage of Geo Bags of size 2.00m x1.50 m including loading & unloading, stacking cost of P.O.L. , etc.complete and including hire charge of truck with driver and handymen completed as directed. Total distance from guwahati to work site=305 km. Rate=305x0.11=Rs.33.55/bag/km

Carriage of Geo Mat of including loading & unloading stacking cost of P.O.L. etc. complete and including hire chare of truck with driver and handyman completed as directed.otal distance from guwahati to work site=305 km. Rate=305x0.026=Rs.7.93/Sqm/km

NK AGARWALLA