TNGN/Tangani (2 PFs)

टंगानी

টঙানী

Track: Construction - Double-Line Electrification

This may be the reason ..
but contruction consyraints were alsoanother reason ..
after 2014 this bridge opening deadine has overshooted twice ..
following are the constraints faced as quoted
Guwahati: Originally scheduled to...
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be inaugurated in 2009, Bogibeel Bridge, the country's longest rail-cum-road bridge, is facing numerous challenges which have made the progress of work slow.
The stiffest challenge so far is the construction of guide bunds on the turbulent Brahmaputra river within the short time of four to five months a year because of the rainy season and flood, a top official of the Northeast Frontier Railway said.
"Construction of guide bunds has been the most challenging task of this project as it has to be completed up to the safe level ...... during the very short working period of four to five months," N F Railway General Manager, Construction R K Singh.
Singh said that early flood in the river restricts the working season to a very short period of approximately five months, from November to March only.
"It demands huge mobilisation of equipment for execution of the massive work of the project," Singh explained.
Another major challenge is transportation of concrete across river channels of 600m to 900m width from both the banks. However, it has been overcome by adopting pumping of concrete through pipeline laid over buoys with multiple concrete pumps, he says.
"The width of the river at the alignment location of the bridge was approximately 10.30 km. Approach embankments inside the dyke up to the abutments of the bridge were constructed before placing the guide bunds at the approaches of the bridge," the railway official said.