MUMBAI/SRINAGAR: A community of 16 massive and small bridges, together with two with Italian expertise — with a complete size of two.3 kms — are developing at a fast tempo on the upcoming Udhampur-Srinagar-Baramulla Rail Hyperlink (USBRL), officers right here on Monday.
The bridges are being constructed by engineering large Afcons Infrastructure Ltd. Mumbai for the USBRL on the 66-km lengthy alignment being executed by Konkan Railway Company Ltd. (KRCL) to remodel the lives of the folks of the valley and hyperlink Jammu & Kashmir with the remainder of the nation.
For the primary time in India, a collection of 16 Pre-loaded Spring Dampers (PSDs) are being put in on Bridges No. 39 and 43 to counter seismic load and improve security, ushering a brand new period in bridge constructing in such geologically advanced terrain, mentioned Alimilla Sagar, Afcons Venture Supervisor for the 16 bridges.
Imported from Italy, the PSDs set up will begin in October and be accomplished by December, on these bridges coming within the Reasi, Bakkal, Kouri and Sangaldan sector with 90 % works accomplished, he added.
The PSDs shall be put in in the principle span and two platform spans of the 2 bridges, and the Italian carpentry groups for implementing them have reached the location.
“Additionally, a tie-down mechanism is being used on Bridge 39 which is facing the Chenab Valley, to counter the high wind velocity that will hit the structure and ensure its safety,” Sagar mentioned.
The PSDs are notably mandatory for bridges 39 & 43 as a result of they’re steady composite metal girders with spans of 490m and 777m respectively, and might be susceptible to any seismic wave would possibly as they’re positioned within the Reasi district, which falls underneath most-active seismic area of Zone-V, and the Reasi fault traces move via the area, he mentioned.
The PSDs are designed to counter the seismic load within the buildings, limiting and damping the actions that come up between components of a construction throughout earthquakes, assist resist the seismic forces and improve the bridge’s power and are put in immediately between the bridge and piers, in accordance with Sagar.
For the 16 bridges, to date practically 17-lakh cubic meters’ excavation has been carried out, 25,000 tons of structural metal and 27,500 tons of reinforcement metal and over 63,000 tons of cement have been consumed, he mentioned.
Afcons’ Vice President for Core Strategies & Engineer Group Mandar Karnik mentioned that Bridge 39 has seven piers, three increased than 70 meters, the tallest is 103 meters or 30 meters increased than Qutb Minar.
“The bridge foundations are located at almost inaccessible locations, the entire superstructure of 490-metre length was fabricated in structural steel, assembled behind abutment and launched incrementally,” mentioned Karnik.
Discussing the key hurdles, Senior Supervisor, Amount Survey Ladli Prashad mentioned that these embrace opposed climate circumstances, advanced geology, excessive engineering, sudden rain, slender and landslide susceptible roads with hairpin bends to move heavy supplies, steep slopes and frequent landslides that made the troublesome job all of the more difficult.
Regardless of these obstacles, Senior Supervisor, HSE, Subash C. Satpathy mentioned that the venture achieved 17.50 million Secure Man Hours as a consequence of strict implementation of security protocols.
As soon as accomplished, these 16 bridges shall be related to the mega-marvel Chenab Railway Bridge arched superstructure, which was executed in August for the railway line on the USBRL venture to allow passengers to achieve their vacation spot safely by trains.
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