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Project in Detail

The Helix Bridge

Transport
Singapore, Republic of
Cox Rayner Architects, Brisbane, Australia
Architects 61, Singapore, Republic of
2010
World Architecture Festival 2010 - Category Winner

Christopher Frederick Jones - Christopher Frederick Jones 


The Helix Bridge is one of the few, if any, bridges in the world to be named after its structure. In addition to its uniqueness of structure and form, it was designed to respond to its particular setting at the opening of the Singapore River to Marina Bay, a large inner harbour on which much of the city is now focussed.

The concept derived initially from the desire to curve the plan of the bridge so that it sweeps down onto promenades either side. This ‘arc’ was also means of curving the pedestrian bridge away from an adjoining new vehicular bridge, also designed by the same team, while enabling the two to connect at a mid-point.

The brief required the Helix Bridge to be canopied for shade and shelter in the tropical climate. The notion of a tubular cross-section, which allowed the canopy and deck to be integrated, evolved from this requirement. The team found that a double spiral structure would utilise up to five times less steel than a conventional box girder bridge, and equally became excited about the prospect of such a structure making an iconic statement about Singapore as a ‘green’, walking city.

Having selected the design in a 36 entry international design competition, Singapore’s Urban Redevelopment Authority decided that it should be constructed entirely in stainless steel. This decision enabled the tubes, struts and ties to be finely crafted, the multiple connection joints being designed to appear organic. These details, and the helix form overall, led to the bridge being popularly compared to the DNA molecule, with its connotations of ‘life-giving’ and ‘sustainability’.

The great intrigue of the structure is derived from its ability to curve in plan and section while maintaining continuity of its dual spiral over the 280 metre length. This achievement was the result of a process of highly sophisticated 3D computer modelling, through which the proportions and connections were progressively refined. To accentuate the ribbons of structure, LED lighting is incorporated along both spirals, and in ground lighting embedded to highlight the combination of glazed and perforated steel canopy segments.

The final pieces of the design are a series of ovular-shaped cantilevered viewing ‘pods’, each with a capacity of 100 or so people, that extend out on the bay side to create ‘ring side’ viewing for water events. These decks reinforce the design intent of the bridge to optimize pedestrian experience of the bridge as new urban place as well as of its role as a vital connector between Singapore’s major existing and emerging urban precincts.

Lead Architect »

Cox Rayner Architects
Brisbane
Australia
 

Professional Credits »

Architect
Architects 61
Singapore, Republic of

Client / Developer
Urban Redevelopment Authority, Singapore
Singapore, Republic of

Environmental Engineer
ARUP Limited
Singapore, Republic of

Landscape Architect
Tierra Design
Singapore, Republic of

Structural Engineer
ARUP Limited
Singapore, Republic of