Rama IX Bridge
Coordinates: 13 ° 40 ′ 58 ″ N , 100 ° 31 ′ 5 ″ E
| Rama IX Bridge สะพาน พระราม 9 |
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| use | Road bridge | |
| Crossing of | Mae Nam Chao Phraya | |
| place | Bangkok | |
| construction | Cable-stayed bridge | |
| overall length | 781 m | |
| width | 33 m | |
| Longest span | 450 m | |
| Clear height | 41 m | |
| start of building | October 1, 1984 | |
| opening | 5th December 1987 | |
| planner | Hellmut Homberg | |
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The Rama IX Bridge ( Thai สะพาน พระราม 9 ) is a six-lane road bridge over the Mae Nam Chao Phraya ( Chao Phraya River ) in Bangkok , the capital of Thailand . As part of the Chalerm Maha Nakhon Expressway, the bridge connects the Amphoe (district) Phra Pradaeng in the province of Samut Prakan with the Khet (district) Yannawa in Bangkok.
The bridge is named after the Thai King Bhumibol Adulyadej (Rama IX.) And was opened on December 5, 1987 on his 60th birthday. It was the first cable-stayed bridge in the country and when it opened it had the second longest span of all cable-stayed bridges in the world. In 2013 it still had the largest span of all cable-stayed bridges with centrally arranged stay cables and pylons .
Originally the color scheme was black and white (pylon ropes). The bridge has been painted yellow since 2006, the color of the royal family.
description
The Rama IX Bridge was built between October 1, 1984 and October 1987 as part of the third arm of the Chaloem Maha Nakhon Expressway. It is part of a total of around 2.7 km long bridge structure, the long rising ramp bridges of which bring the expressway to the level of the bridge, for which a clearance height of 41 m was required to allow shipping to pass.
The actual cable-stayed bridge has a length of 781.20 m between the transition structures to the ramp bridges. Its 33 m wide bridge deck consists of a steel box girder with an orthotropic plate and a construction height of 4 m.
The main opening of the bridge between the pylons on the bank has a span of 450 m. This is followed by bridges with spans of 61.20 m, 57.60 m and 46.80 m on both sides. The bridge fields rest on wide reinforced concrete pillars. Above the main opening, the bridge deck is supported by centrally arranged stay cables, which are anchored in a harp shape to two pylons in the form of steel vertical stems with a right-angled cross-section, which stand on the concrete pillars in the middle of the two directional lanes. The pylons are 87 m high.
The Rama IX Bridge was designed by Hellmut Homberg . With its multi-rope inclined tensioning in one plane in the central axis, its conception is similar to that of the Friedrich-Ebert-Brücke (Rheinbrücke Bonn-Nord) designed by him in the early 1960s . The detailed planning was carried out by the British engineering office Peter Fraenkel & Partners Ltd. On the construction site, Antony Freeman worked as a resident engineer (roughly: construction manager ), the son of the renowned bridge construction engineer Sir Ralph Freeman .
Web links
- Rama IX Bridge. In: Structurae
- Rama IX Bridge Bangkok on the website of pfp consulting engineers - Peter Fraenkel & Partners Ltd.
- http://www.opacengineers.com/index.php?menu=projectsheet,RamaIX Description of the construction
Individual evidence
- ↑ a b Leonardo Fernández Troyano: Bridge Engineering. A global perspective. Colegio de Ingenieros de Caminos, Canales y Puentes, Thomas Telford 2003, ISBN 0-7277-3215-3 , p. 612
- ^ Anthony Freeman , obituary in The Independent, August 13, 1998