Virudhunagar Junction – LC 380
Virudhunagar Composite Railway Overbridge (ROB LC-380)
Composite bowstring steel girder railway overbridge erected in synchronised night blocks under live overhead electric traction, eliminating level crossing LC-380.
Scope of Work & Structural Compliance
Executed to RDSO drawings and Southern Railway safety norms, with every erection stage cleared by the railway engineer before the line was reopened.
Rail Overbridge Substructure
- arrow_right_altRail-Side Foundations:Pile and open foundations cast under railway supervision, clear of the running line and OHE masts.
- arrow_right_altBox Pushing for Underbridges:Reinforced box sections pushed through live embankments on jacks within possession windows.
- arrow_right_altPSC Girder Fabrication:Precast girders cast off-site to RDSO-approved drawings with certified tendon stressing records.
- arrow_right_altApproach & Retaining Works:Reinforced earth walls and approach embankments built to railway formation standards.
Girder Launching Under Live Traction
Composite girder spans launched in synchronised night blocks under live overhead electric traction, with zero disruption to scheduled services.
Third-Party Independent Testing
Direct oversight and QA verification conducted by the Department of Civil Engineering, National Institute of Technology (NIT) Tiruchirappalli.
Railway Civil Works 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.
Railway Boundary Survey & Safety Plan
Crane placement studies, block plans and OHE clearance drawings approved by the divisional engineer before mobilisation.
Foundations & Piers Inside the Railway Boundary
Pile and open foundations cast clear of the running line and OHE masts, with continuous track monitoring.
Steel Girder Fabrication & Trial Erection
Bowstring girders fabricated off-site, trial-assembled and dimension-checked before being moved to the block.
Night-Block Girder Launching
Spans launched in synchronised traffic and power blocks under live traction, with the line restored each morning.
Deck, Approach & Commissioning
Zero PenaltyDeck slab, approach roads and signage completed and the new bridge opened for road traffic over the railway.
“The overbridge was erected entirely within the notified blocks, and the line was handed back on time after every possession. Documentation and safety compliance were maintained without exception.”
Er. S. Balakrishnan
Divisional Engineer, Southern Railway, Madurai Division
Virudhunagar ROB Alignment
Total corridor length: 420 M
Virudhunagar Junction Approach to Bypass Link Road
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