The award winning park Gardens by the Bay is located in the immediate vicinity of Marina Bay Financial District in Singapore and was designed by the world renowned architects Grant Associates and Wilkinson Eyre. Extending over 101 ha, the park accommodates two giant, dome-shaped conservatories containing more than a quarter of a million rare plants that are native to Mediterranean and semi-arid subtropical climates.
In view of the large scale architectural planning and the efforts spent on energy conservation, structural design issues were only of secondary importance in this project. Notwithstanding, the construction of the giant conservatories posed some very challenging engineering problems. In order to provide a large amount of column free space and to allow maximum sunlight into the two conservatories, a decision was made not to use any vertical supports for the architectural steel-glass structures of the giant structures.
The floors of the 3-storey Flower Dome and 6-storey Cloud Forest were also designed with minimum column supports. For this purpose, the floors were post-tensioned using DYWIDAG Strand Tendons. Utracon, DSI's licensee in Singapore, supplied Ø 0.6″ DYWIDAG Strand Post-Tensioning Systems with 12, 15 and 19 strands for the slabs and beams.
At the Flower Dome, a 17 m long cantilever platform projects out majestically. This elegant engineering structure would not have been possible without the use of a post-tensioning design.