“The only way to discover the limits of the possible is to go beyond them into the impossible”
-Arthur C. Clarke
Introduction
On 13 Aug 2022, the bridge on the River Chenab in the Reasi District of J&K was finally completed. It was a case of the impossible becoming possible. It all happened because of a very high degree of self-belief of those who planned it and the sincerity of thousands of those who worked hard for the last 18 years. Indeed, it was the best gift the Indian Railway in general and Indian Engineers, in particular, could give to India on the 76th Independence Day of India. It is also highly symbolic that it is located in the State of J&K and in a way appeared to be a giant step towards the integration of J&K with the rest of the country.
The Bridge over the River Chenab is part of the Jammu-Udhampur-Baramulla Railway line, which is being constructed. While Sections of Jammu-Udhampur, Udhampur-Katra and Banihal-Baramulla are already completed and opened for traffic, section Katra- Banihal is still not complete. The degree of difficulty in this section is enormous. Besides this Bridge on Chenab (more about it a little later), the Bridge on Anji Khad (which is under construction) and a total of 35 tunnels and 37 bridges make this section of 111 km in the mountainous terrain extremely challenging and an engineering marvel in the making.
Progress of the Project – It is a 356 km railway project, starting at Jammu and going up to Baramulla. It was started in 1983 with the objective of connecting Jammu Tawi to Udhampur. Construction of the route faced natural challenges including major earthquake zones, extreme temperatures and inhospitable terrain. Finally, in 2005 The 53 km long Jammu–Udhampur section opened after 21 years with 20 tunnels and 158 bridges. The cost of the project had escalated to ₹515 crores from the original estimated cost of ₹50 crores. In 1994 The railway accepted the necessity to extend the track to Baramulla. However, at that point it was thought that the project will have two disconnected arms; one from Jammu to Udhampur and the second from Qazigund to Baramulla. In 2002 the GoI declared this project to be a national project. This means hereafter, the entire funding will be from the Central Budget. At that time the necessity was also accepted to connect the two disconnected arms. The estimated cost of the project assessed then was ₹6,000 crore. In 2008 the 66 km section between Anantnag and Manzhama (outside Srinagar) was opened for traffic. In 2009 this Service was extended to Baramulla. During the same year, the line from Anantnag was extended to Qazigund.
Also Around the same time, an extension of the track from Baramulla to Kupwara was proposed, and its survey got completed in 2009. In 2009 itself, work on the section between Katra and Qazigund resumed after a review based on geotechnical studies. In 2011, an 11.215 Km long Banihal Qazigund tunnel across the Pir Panjal Range was completed. This paved the way for a trial run in Dec 2012 from Banihal to Qazigund. In 2014 the train route from Udhampur to Katra was also operationalised. Now the only missing link in this nationally vital rail line was Katra-Banihal. Finally, in 2018 the GoI approved the extension of the railway line to Kupwara.
Degree of Difficulty in Katra- Banihal Section – This is a 111 km long stretch. 97.34 km of this stretch will be through tunnels. There are 20 Major (including the bridge across the Chenab river and a bridge on Anji Khad) and 10 minor bridges on this stretch.
Bridge Across Chenab
Location: The Chenab Rail Bridge is a steel and concrete arch bridge between Bakkal and Kauri in the Reasi district of J&K, India. It needs to be noted that it is the highest railway bridge in the world. After many hick-ups, finally in 2012 excavation of the foundation of the bridge commenced. The tender was with Afcons Infrastructure Limited. The alignment crosses a deep gorge of the Chenab River, which necessitates the construction of a long-span railway bridge with a viaduct for approaches on either side.
Details: It is a 785 meters long single arch bridge where the main arch is 467 meters. The total span of the bridge is 1315 meters including a viaduct of 650 meters on the Northern side, Deck height is 359 meters above the river bed and 322 meters above the water surface which is 35 meters more than the height of the Eiffel Tower. The project also entails the construction of 203 km of access roads. The deck is 13.5 meters wide, where two rail tracks will be available. The total cost of the Bridge is Rs 1486 Crores.
Design: The steel arch has been planned because the construction of the pillar was difficult and the load had to be distributed. Chords have been provided to cater for the swaying load. The steel structures of the bridge were manufactured in workshops built in the mountains. The workshops had been moved to the building site because there is no proper road network in the challenging terrain. The longest building parts that could be delivered to the site were 12 meters in length. Therefore, four workshops were established in the mountains. Workshops and paint shops were built on both sides of the valley. All steel materials, except for the smallest rolled profiles, were delivered to the mountains as steel boards. The insufficient infrastructure of the area caused additional problems. There was no electricity and the water of the river was not suitable for manufacturing concrete. All electricity had to be produced at the site and the water was delivered from further away in the mountains. The job was also challenging because the track had a curvature in the approach bridge. In this section, the construction stage bearings had been designed in such a way that it was possible to launch the steel deck in the curvature portion as well. The bridge consists of about 25000 tonnes of steel structures, the main portion of which was used for the arch bridge section. It is a unique design and as such none of the Indian codes fully catered for the design validation. Therefore it was decided to follow the BS Code. The design also caters for wind load effects as per wind tunnel tests. It can cater for wind pressure of 1500 Pa. It is a blast resistance design. The design of the decking has been checked for fatigue as per the BS Code. The most important aspect is that it caters for redundancy within the structure, for a lower level of operation during mishaps and against collapse in extreme cases of one-pier failure. The area has high seismicity and the design was planned to withstand earthquakes of the severity of 8 on the Richter Scale. The bridge design is for a rail speed of 100 kmph. This means it can withstand very high-intensity of vibrations. The designed life of the bridge is 120 years and to take care of assessed steel fatigue the fatigue design selected is BS:5400 Part-10. The bridge will be able to withstand a temperature of minus 200C and a wind speed of 266 kmph.
Team: The viaduct and foundation have been designed by M/s WSP(Finland) and the Arch design has been made by M/s Leonhart, Andra and Partners (Germany), the foundation protection has been designed by IISc Bangalore. The executing agency has been M/s Konkan Railway Corporation Limited.
Status of Katra-Banihal project
Although, the construction of Chenab Bridge is a major milestone in the progress of the project, however, still many more landmarks are required to be crossed before the completion of the project. Foremost of them is the Anji Khad bridge which is expected to be ready only by Dec 2022. It is expected that this rail Section will finally be operational by the middle of 2023.
Conclusion
The Jammu-Udhampur-Katra-Banihal-Srinagar-Baramulla Rail project is a vital national project which has a major bearing on national security and nation building. It is a matter of pride that Indian Engineers have achieved what at one point had appeared impossible. It will help in the integration of J&K with the rest of the country and will help strategically in many ways. The completion of the project will also give confidence to expeditiously complete other projects of national importance like; the railway line to Leh and the Railway line to Tenga in the North-East.
End Note:
1. Conceptual Design of the Chenab Bridge in India by Pekka Pulkkine WSP Finland, S Hopf and A Jutila. Available on Research Gate: https://www.researchgate.net/publication/257725212_Conceptual_Design_of_the_Chenab_Bridge_in_India.
2. An internet upload: https://byjus.com/current-affairs/chenab-bridge/
3. A Report by OT Staff, “Once the bridge is completed, it will provide all-weather connectivity between Kashmir and the rest of India” reported on 07 Apr 2021 and uploaded on https://www.outlookindia.com/outlooktraveller/travelnews/story/71397/all-about-the-chenab-bridge
4. An internet upload: https://en.wikipedia.org/wiki/Jammu–Baramulla_line
5. An internet upload: https://en.wikipedia.org/wiki/Chenab_Rail_Bridge
6. An internet upload: https://www.pib.gov.in/PressReleasePage.aspx?PRID=1709652
7. Zee Media Bureau, “Indian Railways: Delhi-Kashmir, Katra-Banihal train route to open soon, project nears completion” dated 08 Aug 2022 and uploaded on https://zeenews.india.com/railways/indian-railways-delhi-kashmir-katra-banihal-train-route-to-open-soon-project-nears-completion-2494827.html
Image 1 Credits: Arun Ganesh
Image 2 Credits: Indian Railways
Image 3 Credits: Indian Express
Image 4 Credits: Indian Railways
Feature Image Credits: The Indian Express
2 comments
A very elaborate and a descriptive write up, with abundant information . It is great to read and get all the difficulties faced during the initial planning and construction of the bridge. My complements to the writer who has great pains to ascertain all the minutest details and put it in a systematic manner.
It sure is a marvelous piece of engineering, thanks for bringing out this well researched article, sir. The bridge has great looks and provides the much needed railway link.
But sir, I wonder why it is just a railway bridge, I read in some reports that more than 200kms of approach roads have been built to construct this railway line of approx 350kms. So why the GoI did not consider a road cum railway project from the beginning as the road network connecting Jammu to hinterland in Kashmir is woefully inadequate.
Another facet is the security of the railway line and the bridges which would have been much simpler and cost effective with a combined rail/road project keeping in mind the anti-national elements active in the region.
And lastly sir, the train frequency; will we able to achieve an adequate train frequency in the region to get back the costs incurred in creating this infrastructure which will only be used by the railways??
Well, my queries above may be ill-founded as I am not privy to the raison-de-etre of the railway line so please take this as queries of an uninitiated and ill-read person.