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Ensuring Structural Integrity:
Civil Engineering Approaches for Long-Term Reliability
Dileep Kumar K K, DGM (Civil)
Madankumar P, DGM (CTR)
In Kochi Metro, the silent strength of civil infrastructure plays a crucial role in ensuring
uninterrupted operations. From elevated viaducts to station platforms, depot structures,
and water management systems, the physical backbone of the metro is entrusted to
the Civil Engineering team for upkeep, reliability, and long-term sustainability. This
article captures the interventions, innovative materials used, and improvement
initiatives undertaken over the past year by the Civil department of the O&M wing.
Preventive Civil Maintenance Framework
A structured regime of Quarterly, Half-Yearly, and Annual Preventive Inspections has
been sustained for all critical structures, including:
Elevated viaduct spans and piers
Station buildings, roof structures, and platforms
Muttom Depot facilities and administrative blocks
Ancillary systems such as ETP/STP, bio digesters, and pest control
Visual inspections, soundness checks, minor rectifications, and systematic
documentation have helped detect and address potential concerns early.
Structural Monitoring and Condition Assessment
NDT (Non-Destructive Testing): Rebound hammer and ultrasonic pulse
velocity tests have been conducted on selected viaduct piers to assess early
signs of internal or surface distress in concrete. These tests allow condition
assessment without damaging the structure.
Crack Mapping & Monitoring: Thermal cracks, honeycombs, and joint leakages
observed during inspections are being mapped, tagged, and regularly monitored.
This ensures structural integrity is maintained and helps plan long-term repairs.
Water Drainage Focus: Special emphasis has been placed on maintaining
proper roof drainage slopes, sealed joints, and periodic gutter cleaning to prevent
leakage and seepage during monsoon seasons.
Station Concrete Surface Testing: Hammer testing was carried out
across all station concrete structures to assess surface concrete hardness and
deterioration, helping to pre-emptively identify zones needing surface
strengthening or repair.