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Facts about Bogibeel Bridge

 You everybody know that Bogibeel bridge is a rail-cum-road bridge and it's about 4.94 km long. It is second longest bridge in India, and first longest bridge in Assam (rail-cum-road bridge). It was constructed by Hindustan Construction Company (HCC) with an estimated cost of about 5500 crore. The construction of this bridge started from the year 2002. 


But now I am going to tell some facts about this Bogibeel bridge. Since I live in Dibrugarh, the way of entering this bridge is very familiar to me. As a Civil Engineer you must know how the exterior parts of this bridge has been made. 

So, as you enter from Dibrugarh NH-37 their is a fore lane road. By entering inside the fore lane road road you get a NH-52B which connects the road from Dibrugarh district to Dhemaji district. Before getting into the bridge you will see an Arch-bridge. 



It seems like as you have got the bridge and you enter into it. But actually not's that. By passing that arch-bridge you will have to move more 3-Km to get that Bogibeel bridge. This Arch-bridge has been made to pass the railway under it. 

You read it and go down to get to know the interesting fact: 

After passing through the arch bridge and riding for more 3 km you will get the main bridge i.e., Bogibeel bridge. Since, this is a double decker bridge, so you will get the over-deck where the vehicles run. This double decker bridge has a 3-lane road on the top and 2-broad gauge railway track at the bottom. 



Apart from all these you will also get to know the structure of the bridge, as how the girder of road part and railway part has been given. All those steel girders are used for making this tremendous structure. The bolts, the connectors, the fittings are absolutely fixed with ..............., what to say. It's fixed with such an item, such that it cannot be shacked by huge earthquakes also. 

Look at the bolts, how they are fixed and tightened. 

This is actually the bottom part of railway girder. 


This is the bottom part of road slab. How the cross girders are fixed and how are they tightened without giving any main girder. 

Any way this is about the fact of how the rail girder and road girder is being given. To make this tremendous structure, see the creativity of the Engineer's. They have made the bridge in such a way that, it neither falls nor it can give any external pressure from outside. And just imagine how the above vehicles can run, by giving this cross girders. 

After completion of the bridge, it was inaugurated by PM Narendra Modi on the birth anniversary of our former PM Atal Bihari Vajpayee on 25 December 2018. The Bogibeel bridge will connect the south bank of Brahmaputra river in Assam Dibrugarh to Dhemaji districts. The 4.9 km long bridge on the Brahmaputra river boasts on being India's second longest rail-cum-road bridge. 

The design of the bridge has 41 spans of 125 m and a superstructure of composite welded steel truss and reinforced concrete. It is designed to be able to carry a double line 1676 mm broad gauge(BG) railway line at the lower deck. Owing to it's strategic importance, it was also built with supporting the movement of tanks and aircraft in mind. It is the longest combined rail-cum-road bridge in India and first longest bridge in Assam over the Brahmaputra, after Dr. Bhupen Hazarika Setu. 

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Location: Dibrugarh, Assam, India

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