Table of Contents
BASICS REASONS BEHIND THE TRAGEDY PROGRESS OF NER
• Geographical Factors: Hills account for about 70 % area of NER
and accommodate about 30 % of the population. Floods and
Landslides in Brahmaputra and Barak Valleys of Assam.
•Infrastructural Factors: NER has about 6 % of the
national roads and about 13 % of the national highways,
quality is not good.
NOTES
The Railways hopes to reach all state capitals in the Northeast by March 2020.
IMPHAL, Manipur.
MANIPUR
• For its supplies, Manipur is dependent solely on either NH2 from Numaligarh via Nagaland, or NH37 from Silchar. NH2 is mostly shut due to bandhs and blockades; NH37 is no more than a dirt track.
•The planned railway line from Jiribam to Imphal will link the capital with the rest of India through Silchar, Haflong, Lumding and Guwahati in Assam.
NOTES
World’s tallest girder railway bridge is being built in the North East as part of the upcoming 111-kilometers long JiribamTupul-Imphal railway line.
At the project site, around 1,500 security personnel from across security forces, including from Assam Rifles, Manipur Rifles, Indian Reserve Batallion, state police and the Railway
Police Force, are present. The project was sanctioned in 2008 and has a deadline of December 2020 to be operational.
PROBLEMS
•* 33 militant groups operate in project area
•* Economic blockades, bandhs are common
•* Kidnappings, firing at work site common
•* NH37 in bad shape, affects transportation of materials and machinery.
WORLD’S TALLEST GIRDER RAIL BRIDGE.
•World’s tallest girder railway bridge is being built in the North East as part of the upcoming 111-kilometres long Jiribam-Tupul-Imphal railway line.
WORLD’S TALLEST GIRDER RAIL BRIDGE.
• Called Bridge No 164, the world’s tallest girder railway bridge, will have a pier height of 141 metres.
• At present, Europe’s Mala-Rijeka viaduct is the world’s highest at 139 metres.
• At 141 metres, the bridge over river Iring will be as high as two Qutub Minar’s stacked on top of each other.
COST?
The final cost of the bridge is assessed to be around Rs 400 crore including the safety work.
The cost of the complete project up to Imphal is expected to be around Rs 13,800 crore.
GIRDER BRIDGE
A girder bridge, in general, is a bridge that uses girders as the means of supporting
the deck.
A girder bridge is very likely the most commonly built and utilized bridge in the
world.
THE SUPERSTRUCTURE CONSISTS OF SEVERAL PARTS:
• The deck is the roadway or walkway surface. In roadway applications it is usually a poured
reinforced concrete slab, but can also be steel grid or wood plank. The deck includes any
road lanes, medians, sidewalks, parapets or railings, and miscellaneous items like drainage
and lighting.
• The supporting structure consists of the steel or concrete system supporting the deck. This
includes the girders themselves, diaphragms or cross-braces, and (if applicable) the truss or
arch system. In a girder bridge this would include only the girders and the bracing system.
The girders are the primary load support, while the bracing system both allows the girders
to act together as a unit, and prevents the beams from toppling.
• The job of the bearing pads is to allow the superstructure to move somewhat
independently of the substructure. All materials naturally expand and contract with
temperature – if a bridge were completely rigid, this would cause unnecessary stress on the
structure and could lead to failure or damage. By fixing the superstructure at one end, while
allowing the other end of a span to move freely in the longitudinal direction, thermal
stresses are alleviated and the lifespan of the bridge increased.
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