Rama IX Bridge

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Rama IX Bridge

สะพานพระราม ๙
Rama IX Bridge (I).jpg
Coordinates13°40′55″N 100°31′08″E / 13.682058°N 100.519001°E / 13.682058; 100.519001Coordinates: 13°40′55″N 100°31′08″E / 13.682058°N 100.519001°E / 13.682058; 100.519001
Carries6 lanes of roadway
CrossesChao Phraya River
LocaleBangkok, Thailand
Characteristics
Designcable-stayed
Total length781.20 m
Width33 m
Height87 m
Longest span450 m
Clearance below41 m
History
Construction start1 October 1984
Opened5 December 1987
Location

Rama IX Bridge (Thai: สะพานพระราม ๙, RTGS: Saphan Phra Ram Kao, pronounced [sā.pʰāːn pʰráʔ rāːm kâːw]) is a bridge in Bangkok, Thailand over the Chao Phraya River. It connects the Yan Nawa District to Rat Burana District as a part of the Dao Khanong – Port Section of Chalerm Maha Nakhon Expressway.[1][2][3]

The bridge was named in the honor of King Bhumibol Adulyadej's 60th birthday. The opening date coincided with the king's birthday, with a million people walking over it.[4] It was the first cable-stayed bridge in Thailand[1] and had the second-longest cable-stayed span in the world when it opened in 1987.[5][6]

The original colour scheme, with white pylons and black cables, was replaced with an all yellow scheme representing the king in 2006.[7][8]

Bridge structure[]

View of Rama IX Bridge

The steel superstructure includes the bridge, rigged mast, and cable. The main span of the bridge, which is stretched between two poles, has a length of 450 meters. The main span is a trapezoid 33 meters wide. The bridge has a walkway along its side. The bridge has two main pylons 3 x 4.50 meters. This serves to hold the tension of the cable and weight into the pylon pier. The 121 – 167 mm diameter cables consist of many small wires wound together. The cables vary in length from 50 to 223 meters can absorb the tension for 1,500–3,000 tons.[9]

Approach viaducts[]

The gradually sloping viaducts on each side of the river are dual-double-T, post-tensioned, concrete structures with thirteen 50-metre double spans on each bank cast in-situ with a steel travelling shutter, up to 40 metres above the ground for sufficient shipping clearance.[10]

The Senior Engineer [11] overcame a major construction problem: On releasing the 950-ton travelling shuttering, the suction of the shutters could pull the new concrete off. I suggested that as we were only carrying the dead load at the time, we should stress the work to about 2/3rds the finally required stress so that the material would not “hog” (rise in the middle) so much – this worked well. After removing the shuttering, we applied the full stress.[12]

See also[]

References[]

  1. ^ a b "Rama IX Bridge". Expressway and Rapid Transit Authority of Thailand. Retrieved 1 February 2008.[permanent dead link]
  2. ^ https://www.terrabkk.com/news/154572/%E0%B8%AA%E0%B8%B0%E0%B8%9E%E0%B8%B2%E0%B8%99%E0%B8%9E%E0%B8%A3%E0%B8%B0%E0%B8%A3%E0%B8%B2%E0%B8%A1-9-%E0%B8%99%E0%B8%A7%E0%B8%B1%E0%B8%95%E0%B8%81%E0%B8%A3%E0%B8%A3%E0%B8%A1%E0%B8%81%E0%B9%88
  3. ^ https://www.homenayoo.com/pr-1219/
  4. ^ Beanz means Hines / Peter Hines — the worldwide civil engineer ISBN 978-1-71-456394-4 pages 17 and 18.
  5. ^ "Rama IX Bridge – 10th Year Inspection & Evaluation". OPAC Consulting Engineers. 2001. Retrieved 1 February 2008.
  6. ^ https://today.line.me/th/pc/article/%E0%B8%81%E0%B8%97%E0%B8%9E+%E0%B9%80%E0%B8%9A%E0%B8%B5%E0%B9%88%E0%B8%A2%E0%B8%87%E0%B8%81%E0%B8%B2%E0%B8%A3%E0%B8%88%E0%B8%A3%E0%B8%B2%E0%B8%88%E0%B8%A3%E0%B8%9A%E0%B8%A3%E0%B8%B4%E0%B9%80%E0%B8%A7%E0%B8%93%E0%B8%AA%E0%B8%B0%E0%B8%9E%E0%B8%B2%E0%B8%99%E0%B8%9E%E0%B8%A3%E0%B8%B0%E0%B8%A3%E0%B8%B2%E0%B8%A1+9+%E0%B8%97%E0%B8%B2%E0%B8%87%E0%B8%9E%E0%B8%B4%E0%B9%80%E0%B8%A8%E0%B8%A9%E0%B9%80%E0%B8%89%E0%B8%A5%E0%B8%B4%E0%B8%A1%E0%B8%A1%E0%B8%AB%E0%B8%B2%E0%B8%99%E0%B8%84%E0%B8%A3-v93p6j
  7. ^ "Strength in yellow". The Nation. 10 May 2006. Archived from the original on 1 August 2017. Retrieved 1 February 2008.
  8. ^ https://www.thairath.co.th/content/394647
  9. ^ Ramkhamhaeng University Library staff (5 November 2008). "Rama9 Bridge" Ramkhamhaeng University Library.Retrieved 20 October 2013.From http://www.lib.ru.ac.th/journal/bangkok/rama9.html
  10. ^ Beanz means Hines / Peter Hines — the worldwide civil engineer ISBN 978-1-71-456394-4 pages 17 and 18.
  11. ^ 26 January 2021 obituary and his photo on page 27 of London's Daily Telegraph.
  12. ^ Beanz means Hines / Peter Hines — the worldwide civil engineer ISBN 978-1-71-456394-4 pages 17 and 18.

External links[]


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