Design & Construction of Yamuna Bridge

    Yamuna Bridge

    The building of the two-track metro rail bridge across Yamuna exemplifies the expertise, planning and attitudinal excellence that has gone into the making of the Shahdara-Tis Hazari section of the Delhi Metro Rail Network.

    The state-of-the-art 553 metres long continuous, single pre-stressed box girder, for two tracks across the river Yamuna, was completed in 2001 in a period of just 30 months by using, Incremental Launching’ – a special technique, used prior to this only in the construction of the Panvel Viaduct of the Knokan Railways.
    Yamuna Bridge
    The technique involves the construction of the bridge in segments, as opposed to constructing it in irregular parts. The entire segment is first cast on a casting bed and then pulled over the pillars of the bridge by ‘jacking. The segments were cast, prestressed and launched in increments of 23.20 metre (halfspan) each time. Total of twenty five segments were cast and launched at an average cycle time of 12 days per segment and a total weight of 15,000 metric tons was pushed by the two 400 ton capacity synchronized hydraulic jacks during final launching. The construction technique is ideal for busy cities because it allows construction without any major disruption of traffic. Since the bridge is advanced by sections, unlike conventionally built bridges, there are no joints and this has also ensured a smoother bump-free journey for commuters.

    Yamuna Bridge
    The bridge is founded on pile foundation for P16 and abutment, and on 40 metre deep wellfoundation for rest of the piers. Air-jetting, water-jetting and other modern methods like ‘Jack-down’ were used for sinking the foundations of the one metre thick and ten metre wide RCC wells. Since the length of the bridge kept moving forward section by section during construction, the Delhi Metro Yamuna Bridge has earned for itself the epithet, ‘moving bridge.’

    The Box Subways

    The making of the rail and metro corridors have provided a challenging ground for setting innovative benchmarks in the field of civil engineering. This includes the construction of two Box Tunnel Subways for allowing cars, scooters, light vehicles and pedestrians to pass through safely

    near the Welcome and Seelampur Metro Stations. The 3 metres high, 6 metres horizontal and 30 metres long boxes were inserted below the existing Northern Railway tracks without disturbing the train movement of Northern Railway. This astonishing feat was achieved in a record number of 22 days in the case of the Seelampur Box Tunnel.

    Yamuna Bridge

    • Contract of Design & Construction of Yamuna Bridge - M/s Persys Arvind Techno Private Ltd. (JV) Awarded on – September, 2005 Completion time – 31st August, 2007
    • Cost – Rs. 39.18 Crores,
    • A bridge of Length 698.8 metres has been built between Indraprastha Metro Station to Yamuna Bank Metro Station.
    • Total No. of Spans – 16 includes 2 Cast-in-situ of 26 metres
    • Length of Launching Girder – 96 metres
    • Length of Span – 46.2 metres Total No. of Segments – 224 No. of segments between 2 piers – 16 segments
    • Segments precasted at Mundka
    • Total No of Piers – 17
    • Foundation Type – Well Foundation as this is good for sandy soil Depth of Foundation – 35.5 metres
    • No. of Wells – 17
    • Outer Diameter of the well – 8 metres
    • Inner Diameter – 6 metres
    • Height of a viaduct – 11 metres Laboratories engaged for testing materials–M/s Spectro, M/s Sunbeam and M/s Shri Ram Labs.
    • Consumption of Materials (approx) Cement – 7500 metric tons
    • Reinforcement Steel & Structural Steel – 3000 metre.
    • Material as per approved list of manufactures:
    • Cement–Birla, ACC
    • Reinforcement Steel–Sail, Tata RINL Structural Steel–RINL, SAIL, TATA Guide bund for protection of bridge provided.

    NBMCW September 2007

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