|
Tender For The Lifting And Lowering Of Bridge Superstructure For Bearing Replacement: Lifting Of Box Girder (Till The Height Required For Repairing Of Pedestal And Bottom Of Girder), Carefully Examination Of Placement Of Bearing As Per Actual Design/Drawing, Shifting Of Bearing On The Actual Design Location, Including Holding Of Span Till The Damage Pedestal And Bottom Of Box Girder Repairing And Completion, Lowering Of Box Girder At Its Original Position, Cleaning Of Bridge Bearings, Removal Of Rust, Dirt And Old Grease; Inspection For Wear, Corrosion And Damage, Lubrication Of Moving Parts, Tightening/Replacement Of Fasteners As Required, Application Of Anti-Corrosive Coating On Exposed Steel Surfaces, And Ensuring Smooth Functioning Of The Bearings, Complete As Per Irc, Morth Specifications And The Directions Of The Engineer-In-Charge.,Chipping/Grinding Of Existing Concrete Carefully By Low Impact High Frequency Hammer Without Damaging The Existing Concrete Including Cleaning The Surfaces By Air Blower Etc. The Rate Is Inclusive Of All Materials, Labour, Tools & Tackels Etc Complete., Cleaning The Rusted Reinforcement And Exposed Surface By Wire Brush, Mechanical Device Or Any Other Established Method And Applying Rust Removing Solution Of Approved Make And Quality With Cotton Wastes Wap To Reinforcement And Allowing To Dry The Same. The Rate Is Inclusive Of All Materials, Labour, Tools & Tackels Etc Complete., Applying Two Coats Of Anti Corrosive Epoxy Phenol Of Approved Make And Quality Comprises Of Resin And Hardener Mixed In Equal Proportion By Volume And Ensuring Air Curing Of Minimum 1 Hour After The Top Coat Before Any Subsequent Treatment Etc., M&L (Material & Labour) For Providing And Applying A Priming Cum Bonding Coat Of Two Component Epoxy Resin Etc.,, Drilling And Fixing Teflon Nozzles In Rc/Psc Members Including Drilling Holes (Drilling 12 Mm Dia., 40 Mm Deep Holes In Structural Members At The Intervals Of 600 Mm In Staggered Manner Or As Directed By The Engineer-In-Charge In Rc/Psc Structural Element) And Cleaning Of Holes (To Clean The Holes By Air Blower Prior To Fixing Nozzles) And Fixing Of Nozzles (To Insert 12 Mm Dia. Teflon Nozzles In Cleaned Holes). External End Of Nozzles To Be Machined To Receive Outlet Of Grouting Gun And Fixing It Inside The Holes By Applying Thixotropic Epoxy Putty To Ensure Complete Sealing And Curing The System For Min. 12 Hrs) And Cutting Of Nozzles (To Cut The Nozzles By Chisel After Completion Of Grouting Without Damaging Structural Elements) Etc. Complete., Injecting Low Viscosity (3 -5 Cps) High Molecular Weight Monomer By Pressure And Using Mechanized Injector Gun With Accessories, Till Nozzles Refuses To Accept The Grout Including Mixing Of Materials( Mixing Material Components (Part A & B) In Required Quantities As Per ManufacturerS Instruction By Weigh Batching) And Grouting ( Filling The Grouting Gun With Monomer. Maintain Desired Pressure In The Gun By Air Compressor; Maintain The Pressure At Exit (4 To 5 Kg/ Cm2) By Monitoring Pressure Gauge At Exit. Grouting The Material Through Prefixed Nozzles In The Structural Elements Till Its Refusal. Sealing The Nozzle With Epoxy Putty After The Refusal. Monitoring Leakages Through Other Nozzles While Grouting And Seal Them As Per The Requirement. Repeat The Process For All The Nozzles. The Operation To Be Within Pot Life Of The Material.)And Cleaning Of Gun And Accessories ( The Gun And Accessories Like Valves, Pipes And Other Fixtures To Be Cleaned With Thinner After The Operation To Avoid Jamming Of The Gun.) Etc. Complete., Strengthening Structural Elements With Non Metallic Composite Fiber Wrapping System Comprise Of Uni -Directional Carbon Fiber Sheet (400 Gsm) And Compatible Saturant, By Wet Layup System Including Surface Preparation ( Grinding/Moulding Concrete Substrate, Cleaning It With Wire Brush, Removing Oils, Laitance If Present, Rounding Sharp Edges To Min 25Mm Radius) Etc. Complete Including Profiling, Applying Compatible Primer On Prepared Substrate, Filling The Holes And Uneven Surface With Thixotropic Putty Etc. Complete, Mechanized Wetting Of Fiber Sheet: Cutting The Fabric To Required Size. Mixing Of Saturant And Filling In Tub Area Of The Saturation Machine. Placing The Fiber On Metallic Rods And Pass Through The Rollers Of Machine And Saturant Tub Ensuring Complete Wetting (65% Fiber Volume Fraction) Of Fibers. Remove The Fiber On Rod And Place The New Fiber Sheet. Wrapping: Wrapping The Fiber Sheet To Structural Element At Desired Orientation Using Tamping Roller To Avoid Any Air Voids Etc. Repeat The Same Procedure For Multiple Layer With The Interval Of 8 Hrs. Second Coat: Applying Second Coat Of Saturant After Min. 12 Hrs, Rectify Air Voids If Any. (Mode Of Measurement: Per Sq.Mt Of Carbon Fiber Sheet Consumed And Not Surface Area Of Application)., Providing And Fixing Carbon Fiber Anchor Including Drilling Hole In The Base Concrete Fixing The Anchor Using Epoxy 50X55 System Spreading The Anchor Fibers In Star Pattern Including Appication Of Saturant Etc. Complete., Providing & Applying High Strength Carbon Fiber Reinforced Polymer Composite Pultruted Plates (2800Mpa Tensile Strength, 1.4Mm Thickness, 100Mm Width) Per Running Meter, Including Solvent-Free Epoxy Resin Adhesive Conforming To Specified Standards For Bonding To Concrete Substrate., Material & Labour For Encasement Of Structural Elements Using Free Flow High Strength Non-Shrink Micro Concrete M-35 With Aggregate Mix, Formwork, Tapping, And 14 Days Curing As Directed., Providing And Fixing High-Grade Aluminum Anchor Plates For Stressed/Non-Stressed Laminates, Including Drilling And Mechanical Anchor Bolts., Providing And Applying Anti-Carbonation Aliphatic Acrylic Coating To Bridge Soffit And Piers, Including Surface Cleaning, Primer, And Two Coats., Scaffolding And Platform To Execute Work For Each Span., Load Testing Of Bridge.
|
