Kolia Bhomora Setu

Kolia_Bhomora_Setu কলীয়াভোমোৰা সেতু
A View of The bridge just After Sunset
Locale	Between Tezpur, Assam, India and Kaliabor, Assam, India
Official name	Kolia Bhomora Setu
Maintained by	Government of Assam
Characteristics
Material	pre-stressed concrete
Total length	3015 metre
History
Construction begin	1981
Construction end	1987
Opened	1987

Kolia Bhomora Setu is a pre-stressed concrete road bridge over the Brahmaputra River near Tezpur and Kaliabor in Assam, India. It is named after the Ahom General Kolia Bhomora Phukan.

This bridge connects Sonitpur on the north bank with Nagaon District on the south bank. The length of this bridge is 3015 meters. The construction of the bridge took place from 1981 to 1987.

The bridge helps the development of the North-East India. The Brahmaputra not only splits the state of Assam along its length but also cuts off the seven sister states of the North-East from the rest of the country.

The river having a catchments area of 280,000 km² flows in the most unpredictable manners, occupying 12 km to 16 km of space at places and poses a challenge to the bridge engineers. Despite the pioneering efforts of the Railways at Saraighat, the Northeast continued to suffer from the long-felt lack of transportation network. Around 25 years later, Indian Railways have turned yet another dream into reality. The 2nd Brahmaputra Bridge has greatly accelerate march of the North eastern states towards 21st century.

Brahmaputra, one of the longer rivers in Asia with a total length of 2880 km – 920 km of which lie in India – had been bridged only at one place, the only link between the North Eastern states with the rest of the country. This 1.3 km rail-cum-road bridge, completed in 1962, was also constructed by Indian Railways. Road Bridge, Guwahati.

Out of 27 foundations, 25 are open wells. The North abutment and pier No.1 are on raft foundations. The wells have been sunk to 56 m below L.W.L, mainly from scour and seismic considerations. The strata encountered were dense sand mixed with pebbles. During sinking, obstructions in the form of wooden logs and boulders were overcome; this was possible with armoured well curb having shoe-brackets and 12 mm thick steel plates.

With elaborate monitoring at each stages of sinking, it has been possible to position all the wells within permissible limits of tilt (1 in 80) and shift (150 mm) each well costing of Rs. 8 million and involving 5,000m of concrete was completed within an average period of 90 days.

Two of the well foundations required launching of Caissons in depth of water ranging from 8 m to 12 m 290 t of steel was required to be fabricated for these caissons. Water-ballasting of sinking-pontoons. To ferry across the construction materials, for simultaneous working on a number of foundations, a large fleet of marine craft was deployed. it consisted of tugs, 20 barges and a number of country boats. For concreting, batching plants of 950 m³/day capacity were installed. nine SLD cranes, three crawler cranes and stand cutter – dredger pumps were used for sinking of well foundations.