Prasad wrote:Pardon me for a basic question. We always hear of british era bridges. How many of these have been, are, will be replaced by 2019? I don't remember hearing about them specifically anytime.
I suppose you are referring to the Setu Bharatam project. This project aims to refurbish 1500 British era bridges and build 208 ROB's at a cost of 30,000 crores, for the refurbishment of bridges component.
I easily anticipate a decade at the rate bridges are built and refurbished in India, to fix 1500 bridges.
Simple fixes could be jacketing the piers, to more complicated ones involving re-girdering the bridge entirely with attendant mega block on a line. https://en.wikipedia.org/wiki/Setu_Bharatam
There are a large number of British era bridges carrying trunk traffic between major metros, leave alone branch lines. One can simply name 50 with no problem. After independence when doubling took place a new bridge was indeed constructed for the second line, but the old British era bridge usually a masonry construction still carries traffic. Here are some examples
1. Narmada bridge, Hoshangabad, opened in 1884.
Carries Delhi-Mumbai and Delhi-Chennai traffic.
2. Jhansi-Kanpur, Yamuna bridge at Kalpi, 1889. Second line project going
on, new bridge will be done hopefully March 2018, but old bridge will carry
3. Bally bridge/ Dakshineswar, Kolkata bridge to Sealdah, 1922.
4. Godavari river bridge, Mancherial, Delhi-Chennai, 1929, third line bridge
is almost complete, see Google Earth what happens when the third bridge
comes up, will they build a new bridge and replace the 1929 bridge?
The third bridge is part of the Delhi-Nagpur-Balharshah-Kazipet-Chennai third line project.
5. Kanpur-Ganga bridge towards Lucknow, 1880 circa. In my time carried
a Metre gauge line and a Broad gauge line, Metre gauge line was part of NER
from the erstwhile Oudh and Rohilkhand railway. These are all gauge converted
6. Netravathi River bridge, Mangalore 1908, doubling has been done, new bridge
in service since 2013, but old bridge carries down line traffic, Chennai-Mangalore and all
traffic entering or leaving Konkan railway to Trivandrum via Mangalore.
7. The most famous British era bridge of all is Pamban bridge to Rameswaram, 1914https://www.youtube.com/watch?v=oxRpej-gkWU
E. Sreedharan( Metro Man Sreedharan) first gained fame in 1964 when he very quickly restored this bridge in a near impossible time frame of 50 days after the devastating cyclone that wiped out parts of this bridge and the bridge beyond to Dhanuskodi. It was estimated the repair would take 6 months.
8. Prince Albert (consort of Queen Victoria) viaduct, Bagra-Tawa bridge on Howrah-Mumbai line via Jabalpur. This is a small single line section (7km) over the Tawa river. This is the only single line section on a fully double lined route and causes major traffic problems. This block section is finally being doubled and a bridge is being built over the Tawa river and due for completion in 2018. Board at Itarsi station, regarding Bagra-Tawa to Sonthalai patch doubling and bridge over Tawa river:https://twitter.com/wc_railway/status/7 ... 56/photo/1
Existing bridge that carries traffic between Mumbai and Howrah is 145 years old. http://www.thehindubusinessline.com/new ... 975349.ece
There are a large number of old masonry British bridges between Mangalore and Shoranur
over many rivers in Kerala. Once in a while these bridges fail with catastrophic loss of life
as in the Kadalundi bridge disaster when 57 people died when Mangalore-Chennai mail fell
into the Kadalundi river near Kozhikode in 2001. Also after gauge conversion the Perumon bridge between
Trivandrum and Kochi collapsed in 1988 when Island express was passing over with 105 fatalities.
The cause of that has never been pinned down but structural failure is a strong possibility.https://en.wikipedia.org/wiki/Kadalundi ... derailmenthttps://en.wikipedia.org/wiki/Peruman_railway_accident