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Chenab Bridge- J &K will be worl'd Tallest Bridge

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Dr. N. Subramanian
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PostPosted: Tue May 28, 2013 6:02 pm    Post subject: Chenab Bridge- J &K will be worl'd Tallest Bridge Reply with quote

Bridge in Kashmir - Stupendous
A wonderful project, when completed , Indian Railways can be proud of this just like Konkan Rlys or DMRC . An engineering marvel in our backyard.! Cost per km. no more than that of an elevated Metro corridor
The next man-made wonder? World's highest railway bridge being built over Chenab will dwarf the Eiffel Tower
PUBLISHED: 21:40 GMT, 14 February 2013 | UPDATED: 21:40 GMT, 14 February 2013

Touted as the next man-made wonder, the world's highest rail bridge being built across Chenab riverbed in Reasi district of Jammu and Kashmir will take at least three more years to be functional. Railway officials say the bridge, which is five times higher than Delhi's Qutub Minar and far taller than the Eiffel Tower in Paris, will be completed by December 2016. The arched structure will connect Baramulla to Jammu via Udhampur-Katra-Qazigund with a travel time of six-and-a-half hours. Currently, it takes exactly double the time - 13 hours - to reach Jammu from Baramulla in northern Kashmir, which is 60km from Srinagar.

The construction of the bridge started in 2002 when Atal Bihari Vajpayee was the prime minister. It was stopped in 2008 when the project was announced to be unsafe. However, the construction restarted in 2010, and has now been declared a national project.

When completed, the bridge will be 1,263 m (4,144 ft) long, with a 480 m (1,570 ft) trussed arch span 359 m (1,178 ft) above the river Chenab and a 650 m (2,130 ft) long viaduct on the Kauri side.

Located at Kauri hamlet, around 40 kms from Reasi, it is being implemented by Afcons Infrastructure Limited. Once ready it will beat surpass the record of Millau Viaduct in France that is the highest cable stayed road bridge in the world.

Prof K S Rao led the team of experts, railway sources said. Its construction was stopped on July 12, 2008, forcing Railways to appoint a seven-member team to examine the safety concerns. Many experts throughout the globe, based on their versatile and relevant experience, have been involved, in order to make this project a success.

The team later visited Anji bridge that, once implemented, will be country's tallest railway bridge and also the longest span railway bridge in India. It has cleared its construction as well. Its height from the bottom of the Anji gorge will be 180 meters with a span of 2200 meters.

National codes of India, Indian Railway Standards (IRS), Indian Road Congress (IRC) and Indian Standards (IS) have been supplemented with International standards; British Standards (BS), International Union of Railways (UIC) and Euro, as national codes, were found inadequate for such large spans. The Quality aspect has been emphasized, as the quantum of fabrication and welding is colossal. Mostly indigenous material has been planned to be used, whereas for the design, international codes have been referred, which means the Quality Control work is still difficult.

Regular painting of such bridges is an intimidating task; hence, a painting scheme has been developed, having life over 15 years, compared to 5 to 7 years (approx.) of life in most of the Indian railway bridges. The erection scheme for the bridge is a project in itself, where two pylons (about 130 m and 100 m high) are to be erected on either side of the river, and two auxiliary cable cranes (Capacity 80T each), consisting of self-propelled equipment, will be running on the carrying ropes across these pylons.

Railways sources said after the clearance, they will be initiating talks with Gamon India for its implementation. It had earlier been allotted the work before its implementation was stopped on safety grounds.

Raising fingers on safety norms of the track, especially the two bridges, led to a series of measures. These included engaging foreign consultants and also involving DRDO for evolving a security blueprint for safety of the wonder the Chenab bridge.

A national project, linking Kashmir with Jammu has been a long pending dream of the policy makers in Delhi. While Jammu is already linked with Udhampur, caving in of certain tunnels delayed the start of the Udhampur-Katra stretch that is otherwise ready.

The rest of the track has two sections, one connecting south Kashmir Qazigund with north Kashmir Baramulla which is functional for over a year now. Completion of the Qaigund-Katra section will complete the project but will take many more years and lot of money.

Sources in the railways said the major tunnel that is connecting Qazigund with Banihal is nearing completion. It is being implemented by the HCC.

Also See: http://www.sefindia.org/forum/viewtopic.php?p=48625
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PostPosted: Sat Jul 20, 2013 11:50 am    Post subject: chenab bridge - one of it's own kind Reply with quote

Fig.1 - Difficult terrain of Chenab River

Fig.2 - Another view at site showing difficult terrain, with Temporary steel towers

Fig.3 - Construction Temporary Steel Towers (for supporting Cable Crane) the steel "tower builder" unit is also seen.

Fig.4 - Temporary Towers completed at Kouri and Bakkal ends

Fig.5 - View from abutment, concrete approach piers are ready.

Fig. 6 - Weather conditions often make hindrances at work (though it looks scenic !)

Fig.7 - The steel structure will be pushed over these piers !

Fig.8 - Cable crane ready to get erected on the Cables

Fig.9 - Cable crane (side view)

Fig.10 - Cable crane closer look, the articulated wheels show the flexibility in the system (Cable crane is supplied by - M/s


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