Rate call for rock fall protection at bhatsa dam

Amount

Scaling of loose rock mass up to 200mm thick and disposal at 3 km from the site as directed, including all material, labour and machinery etc complete.

Design, Supply and fixing rock fall protection / stabilization system comprising of HTS cable nets / HTS wire of cable diameter of minimum 6mm twisted or straight with tensile strength of net minimum 220 kN/m, fixed by sufficient anchoring in rock as per design with arrangement of providing and fixing of boundary and intermediate support ropes 12 mm diameter of High Tensile Steel Wire rope grade 1770 N/Sq. mm with coating for corrosion resistance, 95% ZN+5% AL (+/- 1%) as per EN-10244-2-2009); Secondry mesh having minimum tensile strength of 50 kN/m, with minimum mesh width not more than 90mm with Tensile strength of wire 1770 N/Sq. mm including top & bottom support rope, lacing wire and rope required to connect the nets and all other accessories such as clamps, buckles, plates, thumbles including safety and all other ancillary works, material, machinery, labour. Drilling of 75 mm to 100 mm dia. holes and providing, fixing 32 mm diameter of Fe 500 surface steel nails/anchors of 8 m length and grouting the holes by cement grout with necessary admixtures at grid pattern of 2.00m x 2.00m c/c including all material, machinery, labour, etc. complete; or Equivalent or higher system along with detailed drawings & specifications. Equivalent or higher system wil be evaluated by IIT).

Design, Supply and Installation of High Tensile Steel Wire Mesh/Drape System having minimum tensile strength of 100 kN/m of primary net with tensile strength of wire 1770 N/Sq. mm with coating for corrosion resistance, 95% ZN+5% AL (+/- 1%) as per EN-10244-2-2009) with mesh width not more than 290mm. Secondry mesh having minimum tensile strength of 50 kN/m, with minimum mesh width not more than 90mm with Tensile strength of wire 1770 N/Sq. mm and fixing minimum 10mm diamter wire rope anchor having yield strength of 500 N/mm2 or equivalent of 3m length and grouting holes by cement grout with necessary admixtures at top and bottom at pattern of 3.5m to 4.0m c/c including top and bottom support rope and all other accesspories, material, machinery, labour, etc. complete; or Equivalent or higher system along with detailed drawings & specifications. Equivalent or higher system wil be evaluated by IIT)

Supply and installation of multi strand prestressed cable anchors with initial prestress load of minimum 1094 KN (with 6 no.s of 15.2 mm dia strands with breaking load per mono strand of minimum 260.7 kN) and drill hole dia of 150 mm with full length grouting in two phases, protective sheath for exposed part above the anchor head, centrallizers, including all ancillary items for anchoring, grouting and stressing on the slope surface along with casing (if required) for drilling in collapsible strata as per detailed technical specifications and as directed by engineer in charge.

Providing subsurface drain hole (horizontal / inclined) in the slope with perforated PVC pipe (lined with Non Woven Geotextile) of 50 mm internal diameter by drilling and inserting the perforated PVC pipe as per the drawings etc. complete.

Design, Supply, Pretensioning and installation of 2000 Kilojoule Rock fall barrier in horizontal plane for protection against vertical fall on carriageway. Energy Class : 2000 kJ, Wire Diameter Min. : 3 mm, Ring Diameter Min. : 300 mm, Rope Diameter Min. : 22 mm, Barrier Height Min. : 4 Mtr, Tensile Strength : 1770 N/mm2, ETAG 027 Certification Required. or equivalent/higher system along with detailed drawings and specifications. The equivalent or higher system will be evaluated by IIT.

Providing Supplying and pouring of Grout (1:1.5 cement mortar) including all cost of material, labour, T&P etc complete in articulating Block Fabric Form as mentionedin Cl. No. 4 (above) using Grout mix, that shall mix shall exibit a minimum compressive strength of 20 N/sqmm at 28 days. when made and tested in accordance IS:516. The sand/cement ratio shall be determined by mix designs or as per the direction of Engineer-in-charge etc. complete including all cost of labour, material and T&P etc.

Supplying and laying of Articulating blocks concreting Lining Fabric Form / Geotextile mattress upto 150 mm thick Grouted with Cement mortar Type 1 with neck narrow breakables (as per technical specification enclosed from the Indian manufacturer). The articulating block Fabric Form with narrow breakable necks connected from one block to another with 6mm galvanized steel cables, running vertically or horizontally or both, shall be procurred directly . Proof of manufacturing facilities with photos and copies of relevant industrial permissions/license to be submitted along with bills . tender as documentary evidence including all cost of material labour and T&P etc required for proper completion of work as per direction of Engineer-in-charge.

Supplying and laying of Articulating blocks concreting Lining Fabric Form / Geotextile mattress upto 200 mm thick Grouted with Cement mortar Type 1 with neck narrow breakables (as per technical specification enclosed from the Indian manufacturer). The articulating block Fabric Form with narrow breakable necks connected from one block to another with 6mm galvanized steel cables, running vertically or horizontally or both, shall be procurred directly . Proof of manufacturing facilities with photos and copies of relevant industrial permissions/license to be submitted along with bills . tender as documentary evidence including all cost of material labour and T&P etc required for proper completion of work as per direction of Engineer-in-charge.

Supplying and laying of Articulating blocks concreting Lining Fabric Form / Geotextile mattress upto 250 mm thick Grouted with Cement mortar Type 1 with neck narrow breakables (as per technical specification enclosed from the Indian manufacturer). The articulating block Fabric Form with narrow breakable necks connected from one block to another with 6mm galvanized steel cables, running vertically or horizontally or both, shall be procurred directly . Proof of manufacturing facilities with photos and copies of relevant industrial permissions/license to be submitted along with bills . tender as documentary evidence including all cost of material labour and T&P etc required for proper completion of work as per direction of Engineer-in-charge.

Supply and laying of Fabric Formed Concrete (FFC) Mattress of uniform section with minimum thickness of 75 mm with unilateral galvanized steel reinforcements excluding supply and pouring of fine aggregate concrete etc. complete.

Supply and installation of end bearing anchors(Type-Anchor-2 MT capacity) and of minimum length 3m, made out of high tensile cables as per approved drawings or as per direction of Engineer-in-charge @ c/c spacing 0.50 m etc. complete including all cost of labour, material and T&P etc.

Providing and fixing of ETA-Category A- Dynamic Rockfall Barrier, composed of a system comprising of steel meshes and cables coated in Zn‐Al 5% Class-A(EN 10244‐2, EN 10264‐2), minimum 5000kJ capacity, 6m height, consisting of posts, anchor bolts, plate for fixing anchor bolts, base anchors, cable anchors, cables/support ropes, clamps, retention panels, energy dissipaters etc. complete with post to post distance of 10m and energy absorption by deformation, etc. Completion of work as a whole. The equivalent or higher system will be evaluated by IIT.

Providing and fixing of ETA-Category A- Dynamic Rockfall Barrier, composed of a system comprising of steel meshes and cables coated in Zn‐Al 5% Class-A(EN 10244‐2, EN 10264‐2), minimum 5000kJ capacity, 7m height, consisting of posts, anchor bolts, plate for fixing anchor bolts, base anchors, cable anchors, cables/support ropes, clamps, retention panels, energy dissipaters etc. complete with post to post distance of 10m and energy absorption by deformation, etc. Completion of work as a whole. The equivalent or higher system will be evaluated by IIT.

Design, Supply and installation of Debris Flow Barrier with double mesh i.e high tensile wire mesh or high tensile roll cable net with posts having Impact absorption energy of the system must be minimum of 100 KN/SQM in dynamic loading conditions and as per drawings, Technical Specifications and the direction of Engineer-in-charge. Material used for manufacturing the Debris Flow Barrier should be equivalent to the material used in ETA/ETAG certified mesh of high tensile steel not less than 1770N/mm2. (Equivalent or Higher System will be technically evaluated by IIT)

Supplying, Providing and Laying of Geosynthetic Cementitious Composite mat comprising a special blend of minerals encapsulated between a woven (100 grams/sqm) and two non-woven needle punched geotextiles (200 grams/sqm) having min mass per unit area 7600grams/sqm (+/-20%) before curing and 9100 grams/sqm (+/-20%)after curing as per EN 14196, Having Nominal Thickness of 9mm (+/-15%) as per EN ISO 9863, Tensile strength of 22 kN/m (+/-15%) in Machine direction & 25 kN/m (+/-15%) in cross machine direction as per EN ISO 10319 including safety, all other ancillary works, material, machinery, labour, etc. complete at easily accessible location including top and bottom, with all leads and lifts and as directed by Engineer - In – Charge. (Equivalent or Higher System will be technically evaluated by IIT)

Supplying, Laying and fixing in position of 10 MM thick Geosynthetic Cementatious composite mat, specified as per ASTM: D 8364 – GCCM Type - III specification. flexural strength (28 Day) should be >4MPa and 28 days compressive strength as per ASTM D8329 should not be less 60 MPa. (Equivalent or Higher System will be technically evaluated by IIT)

Spar Geo Infra Pvt Ltd (BID ID -6466090)

Naik COnstruction Company (BID ID -6464074)

R.K.Drillers (BID ID -6464031)

Maccaferri Infrastructure Private Limited (BID ID -6464717)

Pioneer Foundation Engineers Pvt Ltd (BID ID -6454136)