Vaigai Basin Crossing
Vaigai River High-Level Prestressed Girder Bridge
24-span prestressed concrete girder bridge on bored cast-in-situ piles, carrying two lanes of traffic across a seasonal flood river with full scour protection.
Scope of Work & Structural Compliance
Structural design and construction supervised to Indian Roads Congress bridge codes and PWD specification, with independent third-party material testing.
Pile Foundations & Substructure
- arrow_right_altBored Cast-in-Situ Piles:Large-diameter piles driven through seasonal flood beds with cross-hole ultrasonic integrity logging on every shaft.
- arrow_right_altWell Foundations:Steining sunk under bentonite with pneumatic sinking where the riverbed demanded.
- arrow_right_altPier & Abutment Works:RCC piers and abutments cast in lifts with controlled temperature curing.
- arrow_right_altScour Protection:Launching aprons and geotextile mattresses sized to the design flood velocity.
PSC Girder Superstructure
Multi-span prestressed concrete girder deck erected over the active waterway using launching trusses during low-flow windows.
Third-Party Independent Testing
Direct oversight and QA verification conducted by the Department of Civil Engineering, National Institute of Technology (NIT) Tiruchirappalli.
Bridges & Flyovers Code Compliance
Executed to the applicable Indian Roads Congress, MoRTH or RDSO specification for this class of work, with records available for departmental audit.
Dedicated Machinery Fleet Mobilised
Vögele Super 1800-3
High-compaction tracked asphalt paver with AB 500 TV screed, capable of continuous 8.5 m paving widths with laser sensor grade control.
Hamm 311 Tandem Rollers
11-tonne heavy tandem vibratory compactors with integrated HCM asphalt compaction meters, used to guarantee 98% laboratory density.
SANY 150T Crawler Crane
Heavy-duty lattice boom crawler crane mobilised for tandem lifting and millimetre-accurate placement of 72-tonne PSC bridge girders.
Schwing Stetter M1.25
Fully automated on-site concrete batching plant with aggregate moisture sensors, chilled water dispensing and computerised micro-dosing.
Execution Milestones & Phasing Velocity
Chronological phasing of the critical path operations for this contract.
Riverbed Survey & Cofferdam Mobilization
Bathymetric survey across the crossing, access bunds formed and piling rigs mobilised ahead of the monsoon window.
Bored Pile Foundations Completed
All pile shafts cast and integrity-tested by cross-hole ultrasonic logging before substructure works began.
Piers, Abutments & Bearing Plinths
RCC piers and abutments completed with controlled-temperature curing through the summer months.
PSC Girder Launching & Deck Slab
Precast girders erected span by span using launching trusses during low-flow conditions, deck slab cast continuous.
Wearing Course, Approach & Handover
On TimeWearing course laid, approach embankments finished and the bridge opened to traffic on schedule.
“The bridge was delivered within the sanctioned programme despite two monsoon seasons inside the contract period. Pile integrity records and cube results were complete and available at every stage of inspection.”
Er. R. Muthukumar, B.E. (Civil)
Executive Engineer, Public Works Department, Government of Tamil Nadu
Vaigai High-Level Bridge Alignment
Total corridor length: 650 M
Paramakudi Approach to Ramanathapuram Bank
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