Rama IX Bridge

13.682725113333100.51803588861Koordinaten: 13 ° 40 ' 57.8 "N, 100 ° 31' 4.9 " E

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Chao Phraya

The Rama IX Bridge ( Thai สะพาน พระราม 9) is a six-lane road bridge over the Chao Phraya River in Bangkok, capital of Thailand. The bridge connects Chalerm Maha Nakhon as part of the Expressway Amphoe ( district ) Phra Pradaeng in Samut Prakan province, with the Khet (district) Yannawa in Bangkok.

The bridge is named after the Thai King Bhumibol Adulyadej (Rama IX ). Named and was opened on his 60th birthday on December 5, 1987. She was the first cable-stayed bridge in the country and had at its opening, the second longest span cable-stayed bridges all around the world. It has 2013 still the longest span cable-stayed bridges with all centrally located stay cables and pylons.

Originally the color scheme of black and white ( pylons ropes ). Since 2006, the bridge is painted yellow, so the color of royalty.

Description

The Rama IX Bridge was built between 1 October 1984 and October 1987 as part of the third arm of the Chaloem Maha Nakhon Expressway. It is part of a total of about 2.7 km -long bridge, bringing its long sloping ramp bridges the Expressway to the height of the bridge, for a clear height of 41 m was required to make the shipping happen.

The actual cable-stayed bridge has between the transition structures to the ramp bridges a length of 781.20 m. My 33 m wide bridge deck consists of its steel box girder with an orthotropic plate and a height of 4 m.

The main opening of the bridge between the standing at the shore pylons has a span of 450 m. This is followed on both sides close spans with spans of 61.20 m, 57.60 m and 46.80 m at. The bridge spans store on wide reinforced concrete piers. About the main opening the bridge deck is supported by centrally arranged stay cables, which are anchored shape of a harp on two pylons in the form of steel vertical stems with a rectangular cross section, which stand on the concrete pillars in the middle of the two carriageways. The pylons have a height of 87 m.

The Rama IX Bridge was designed by Hellmut Homberg. With their frequent Rope Schrägabspannung in a plane in the central axis of their conception is similar to that of the early 1960s, he designed the Friedrich- Ebert-Brücke ( bridge over the Rhine Bonn -Nord). The detailed planning was done by the British engineering company Peter Fraenkel & Partners Ltd.. At the construction site was Antony Freeman as Resident Engineer ( roughly: site manager ) operates, the son of the renowned bridge construction engineer Sir Ralph Freeman.