Howrah bridge ppt

1. HOWRAH BRIDGE(ESTD-1943)
PRESENTED BY
SOURAV ROY
HOWRAH BRIDGE(ESTD-1943)
PRESENTED BY
SOURAV ROY
ROLL NO. 2014-5060
Under The Guidance Of
Mr. SOUMEN ROY

2. INTRODUCTION
• Howrah Bridge is one of four on the Hoogly river
• It is a famous symbol of Kolkata and West Bengal
• From 1943-92 it was the only connector between Howrah
and Kolkata before VIDYASAGAR SETU.
• It was 3rd cantilever bridge
•Howrah Bridge is one of four on the Hoogly river
•It is a famous symbol of Kolkata and West Bengal
•1943-92 it was the only connector between Howrah and Kolkata before Vidyasagar Setu.
•It was 3rd cantilever bridge
INTRODUCTION

3. HISTORYHISTORY
•The construction of Howrah Bridge was first proposed in 1862
•Later in 1800s a floating bridge was built between Howrah and Kolkata
•The Braithwaite Burn and Jessop Construction Company Limited was
awarded the construction contract

4. Comparing

7. Specification
• It is suspention type balance cantilever bridge
• Central 457.5m span
• Suspended 172m span
• Main towers are 85m high
• Anchor arms are 99.1m each
• Bridge deck hangs from 39 pairs of hangers
• The deck system includes cross girders suspended between the
pairs of hangers by a pinned connection.

8. • Two main expansion joints, one at each interface between the
suspended span and the cantilever arms
• Total 8 articulation joints, 3 at each of the cantilever arms and 2
each in the suspended portion.
• Deck has longitudinal ruling gradient of 1 in 40 from either end
• Bridge is joined by a vertical curve of radius 4,000 feet (1,200 m).

9. • The bridge does not have nuts and bolts
• It consumed 26,000 tons of steel
• The two anchorage caisson were each 16.4m
by 8.2m with two wells 4.9m square
• Set at 31.41m at Kolkata side and Howrah Side
at 26.5m below the ground level
• Skin friction on the outside of the monolith
walls was estimated at 29 kn/m^2
• loads on the cutting edge in clay reched 100
tonnes/m
• Work on the foundation was completed on
November 1938.
CONSTRUCTION
The bridge does not have nuts and bolts
It consumed 26,000 tons of steel
The two anchorage caisson were each
16.4m by 8.2m with two wells 4.9m square
Set at 31.41m at Kolkata side and Howrah
Side at 26.5m below the ground level
Skin friction on the outside of the
monolith walls was estimated at 29 kn/m^2
loads on the cutting edge in clay reched
100 tonnes/m
Work on the foundation was completed
on November 1938.
•It consumed 26,000 tons of steel
•The two anchorage caisson were each 16.4 X 8.2m with two wells 4.9m
square
•The caisson set at 31.41m at Kolkata side and Howrah Side at 26.5m below
the ground level
•The whole weight of the caisson to be carried by the outside skin
friction and the bearing under the external wall.
•Work on the foundation was completed on November 1938.
CONSTRUCTION

12. • The bridge was erected by commencing at the two anchor span
and advancing towards the center with the use of creeper cranes
moving along the upper chords.

13. TRAFFIC
•The bridge serves as the gateway
to Kolkata
•Its average daily traffic close to nearly
1,50,000 pedestrians and 1,00,000
vehicles.
•Trams services were discontinued to
reduce load.
• It carry much more than the expected
load
•Its load-bearing capacity is 60,000

14. MAINTENANCE
•The Kolkata Port Trust is vested with the
maintenance of the bridge.
•Rash driving cause damage.
•Atmospheric phenomenon.
•Biological waste.
•On October 2008, 6 high-tech surveillance
cameras were placed
•Corrosion has been caused by bird
droppings and human spitting.
•Two coats of aluminium paint, with a
primer of zinc choromate before that, was
applied on the bridge

15. MAINTENANCE
•Spitting had
reduced the
thickness of the
steel
•Cleaning of wastes
regularly.
•Fiber Glass
covering the base
of the steel pillars
to prevent spit.

16. CONCLUSION
•These bridge hold in lieu of the city of Kolkata and its surrounding areas
•It add beauty to the Kolkata skyline and attract huge number of tourists
•Structurally, it is marvels and unique in architecture and design
•The engineering study of Howrah Bridge provide ground for
engineers to go on and build similar types of structures
all over the world.

17. References
• https://en.wikipedia.org/wiki/Howrah_Bridge
• https://www.telegraphindia.com/1080706/jsp/calcutta/story9501358.jsp
• http://www.ijser.org
• http://www.howrahbridgekolkata.gov.in/
• http://www.thehindubusinessline.com/news/national/howrah-bridge-pillars-get-protective-cover-
against-gutka-sputum/article4676279.ece
• https://www.quora.com/How-was-the-Howrah-Bridge-constructed
• http://www.mapsofindia.com/kolkata/howrah-bridge.html
• https://web.archive.org/web/20020601114245/
• http://www.roadtraffic-technology.com/projects/howrahbridge/
• http://en.structurae.de/structures/data/index.cfm?ID=s0000304
• http://articles.timesofindia.indiatimes.com/2003-05-29/kolkata/27281185_1_howrah-bridge-kopt-
birddroppings
• http://www.howrahbridgekolkata.gov.in/Traffic%20Flow.xls
• http://www.howrahbridgekolkata.gov.in/Hosanna.htm
• http://www.aisc.org/Content/ContentGroups/Documents/NSBA5/20_NSBA_LongestSpans.PDF

18. CONCLUSION
thank you