Darrang/SDMF/6

Clearing and grubbing road land including uprooting wild vegetation, grass, bushes, shrubs, saplings and trees of girth upto 300 mm, removal of stumps of such trees cut earlier and disposal of unserviceable materials and stacking of serviceable material to be used or auctioned, upto a lead of 1000 m including removal and disposal of top organic soil not exceeding 150 mm in thickness as per Technical Specification Clause 201. By Manual Means In area of non thorny jungle

Excavation for Structures (Earth work in excavation of foundation of structures as per drawing and technical specification, including setting out, construction of shoring and bracing, removal of stumps and other deleterious matter, dressing of sides and bottom and backfilling with approved material. I) Ordinary soil A) Manual Means (II) With dewatering

Providing and fixing of self-drilling anchors of min. 32 mm diameter on cut slope with attached sacrificial drill bit, nut, washer plate, coupler for connecting bars with suitable corrosion protection coating for bar and accessories and full length grouting including all ancillary works for soil nailing/surface anchoring including all ancillary material, machinery, Labour etc. as per detailed technical specifications and as per Engineer - In - Charge.

Providing and laying one layer of Non-Woven geotextile of minimum mass per unit area of 280gms/sqm. having minimum roll width of 5.0m treated with carbon black with physical properties as given in clause no 702.2.3. over 25mm thick compacted sand layer on a prepared subgrade as a filter media with necessary overlaps as per drawing and technical specification and as directed by the Engineer in charge complete.

Providing and laying of high strength flexible geo-grid as primary reinforcement at site store maintained by contractor with a high quality coating like LDPE or equivalent. Latex or Polymer coating or geo-textile or any other coating shall not be permitted. Selection of geo-grid be strictly based on long term design strength values for a design life of 120 years at 30°C. GEOGRID shall have High Strength Flexible Uniaxial with low creep characteristics consisting of polyester (PET) & having an outer protective coating of low density polyethylene sheath. It shall have Ultimate tensile strength as mentioned below against each sub item for reinforcement in Flexible Retaining Wall etc. complete as per detailed technical specifications attached and as directed by Engineer-in –charge.

Supplying and installation of stone facia unit with integrated tail as secondary reinforcement of length 2 m that is made of mechanically woven, double twisted, hexagonal shaped wire mesh, Mesh type 10x12 as per IS 16014:2018, having D=100mm with tolerance of +/-10%, wire dia ID/OD 2.7/3.7mm, Zinc+ High Abrasion Resistant Polymer class A coated, mechanically edged/selvedged and shall have minimum 10 numbers of mesh openings per meter of mesh perpendicular to twist, with partition at 1 m interval etc. (exclusive of supply and filling of stones) complete as per detailed technical specifications attached and as directed by Engineer-in –Charge.

Providing and laying boulder apron for bed protection with stone boulders of minimum size and weight as per Table1300.1, no fragment weighing less than 25 kg laid dry complete as per drawing and technical specifications Clause 1301

Backfilling behind abutment, wing wall and return wall complete as per drawings & technical specification Clause 1204.3.8 Sandy material

Supplying and laying drainage composite for use behind walls, between two different fills etc. having three dimensional composite with thermobonding a draining core having “N” configuration in extruded monofilaments of minimum thickness 8mm, with two filtering UV stabilized polypropylene nonwoven geotextile of minimum thickness of 0.75mm charactersitic opening size (O90) of 150 micron and tensile strength of 8.0 kN/m that will be working as separation or protecting layer, Geocomposite having in plane flow capacity of 2.1 L / (m.s) at hydraulic gradient of 1.0 & 20 kPa pressure and tensile strength of 28 kN/m, with mass per unit area of 1400 gsm, having minimum creep reduction factor of 1.15 for 100 years life at 100 kPa, at easily accessible location including top and bottom, with all leads and lifts, manpower and machinery, materials, labour etc. complete as per detailed technical specifications and as directed by Engineer - In - Charge.

Providing and installation of Cruciform shaped horizontal consolidation units of size 3.1m (height) X 3.6m (width) made of HE 120B/E275 grade as defined in IS 2062 steel beams (min.) connected to single anchor by universal ball joint having the min. breaking load of 300kN and having 8 no's of steel wire ropes connected to front beams and tubular tie and having front facing rhomboidal steel wire rope panel made of 8mm diameter of mesh size 300 mm x 300mm with steel wire knot connection at joint Zn+Al5% class A coated of min. wire rope grade 1770 MPa and nominal punching resistance not less than 250kN when tested in accordance with ISO 17746 and mechanically woven double twisted hexagonal shaped Zn+Al5% class A coated wire mesh panel with mesh wire tensile strength 380-550mpa when tested with IS 16014 : 2018 attached to the cruciform frame as per Particular/technical specification.