Howrah bridge ppt

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 3 rd 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 3 rd cantilever bridge INTRODUCTION

3. HISTORY HISTORY 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

5. 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.

6. 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).

7. 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

8. 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.

9. TRAFFIC The bridge serves as the gateway to Kolkata I ts 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

10. 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

11. 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.

12. 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.

13. 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

14. CONCLUSION thank you