ANTI EROSION WORKS

Amount

Excavation in roadway in soil using manual means for carrying of cut earth to embankment site with a lift up to 1.5 m and lead up to 50 m as per Technical Specification Clause 302.

Preparation of Foundation for Embankment by Manual Means: Scarifying granular surface to a depth of 50 mm and disposal of scarified material with a lift upto 3 m and leads upto 1000 m as per technical Specification Clause 301.4

Proving and laying boulders apron laid in wire crates with 4 mm dia wire confirming to IS:280 and IS:4826 in 100 mm X100 mm mesh (wooven diagonally) including 10% extra for laps and joint with stone boulders weighing not less than 25 kg each as per drawing and Technical Specification clause 1301

Supply and Laying of non-woven Geo-textile fabric sheets of 300 GSM manufactured from 100% virgin Polypropylene (PP) fibre with minimum properties as per IS 16653:2017 i.Wide Tensile strength (MD) ≥ 15kN/m & Wide Tensile strength (CD) ≥ 15kN/m ii.Elongation (MD) ≥ 50% & Elongation (CD) ≥ 50% iii. Abrasion ≥ 95% Trapezoidal Tear Strength (MD) ≥ 340 N & Trapezoidal Tear Strength (CD) ≥ 340 N  CBR Puncture strength ≥ 3000 N iv.Permittivity ≥ 1.25 s-1 v. Permeability ≥ 60l/m2/sec vi. AOS ≤ 75micron vii. UV Resistance @ 500 hours retained Tensile strength (MD) & (CD) ≥ 80% viii Mass ≥ 300gm/m² xi. Thickness at 2KPa ≥ 3 mm. (Each Roll of Geo Fabric Sheet should be supplied in properly packed Bundles and should be marked with the Name of Manufacturer, Batch Number & its dimensions clearly on each roll with “BRAHMAPUTRA BOARD” to be printed on it and mentioning properly the GSM and type of polymer and Test Certificate from approved NABL accredited and ISO Certified Laboratory should invariably be submitted against each batch of material).

Construction of Embankment with Material Obtained from Roadway Cutting. Construction of embankment with material deposited at site from roadway cutting and excavation from drain and foundation of other structures, graded and compact to meet requirement of Table 300.1 and 300.2 as per Technical Specification clause 301.5 NOTE: In case of earth cutting is done by dozer and pushed for filling in the embankment, the input of dozer in the cost of embankment shall be deleted as the same is already provided in the cost of excavation. However, if the earth is dumped by tippers from roadway cutting, the input of dozer for sprading is required to be provided.

Brahmaputra Infrastructure Ltd