Solar Sail bridge

Revolving Solar Sail bridge by Margot Krasojević




Solar Sail bridge
Image © Margot Krasojević

The design proposal is for a pedestrian bridge commissioned by the Ordos government to cross the Wulanmulun River, located in Ordos city, Kangbashi district Mongolia.

Solar Sail bridge
Image © Margot Krasojević

The bridge consists of a main floating section which gives buoyant support to three expanding walkways, and a carbon fiber triple sail which is raised and lowered by the buoyancy rotator, the bridge is a flexible structure and can relocate by sailing along the river to its new location, it folds with multiple sections that stack into each other.

Solar Sail bridge
Image © Margot Krasojević

A hydraulic telescopic secondary structure supports the pedestrian walkway, expanding and contracting into the main body of the primary structure this movement depends on where the sailboat bridge is berthed or sailing to.

Solar Sail bridge
Image © Margot Krasojević

The bridge can be moored along the quayside, sailed into any location along the river or permanently positioned using Caisson foundations which are floated and sunk into position stabilising the bridge, screw-in moorings provide further stabilising along with nine ton anchors to prevent drift.

Solar Sail bridge
Image © Margot Krasojević

The bridge’s flexible walkways adapt to different quays and spans across the river, expanding and folding accordingly. The hydraulic walkway is supported by the river banks landing docks whilst the main body of the bridge is kept afloat by the sail and it’s rotator, the walkway and ring frame’s weight distribution prevents capsize, the primary ring frame has eight marine floatation airbags to further stabilise the sail rotation.

Solar Sail bridge
Image © Margot Krasojević

The sails are made from a lightweight aluminum frame clad in a carbon fiber reinforced polymer, they are suspended from a rotating Mobius ballast chamber hydraulically operated by a thruster to rotate and fill with water in order to revolve the sail and relocate the bridge.

Solar Sail bridge
Image © Margot Krasojević

The rotating Mobius element is made from lightweight aluminium enveloped in stabilizer fins and photovoltaic cells which power the thruster, it consists of five ballast tanks which fill with water which rotate the sail from horizontal to vertical, the other four tanks are left filled with air so that the sail remains buoyant when used either as a bridge or sailed to a new position.

Solar Sail bridge
Image © Margot Krasojević

An array of cylindrical crossflow turbines skim the water’s surface, acting as a raft their buoyancy helps support and stabilise the bridge’s primary structure.

Solar Sail bridge
Image © Margot Krasojević

When the bridge is in use the sail is lowered and acts as a canopy over a seated area for people to enjoy the views and the platform gardens, it unhinges from the hydraulic triangular section ring frame and rotates into vertical position in order to sail down the river.

Solar Sail bridge
Image © Margot Krasojević

Solar panels line the walkway providing energy for the three electric motor generators, the bridge can be towed, sailed or motored into different locations along the Wulanmulun River. Source by Margot Krasojević.

Solar Sail bridge
Image © Margot Krasojević
  • Location: Ordos, Kangbashi, Mongolia
  • Architect: Margot Krasojević
  • Project manager: Margot Krasojević
  • Collaborators: Out to tender
  • Client: Ordos governemnt, Inner Mongolia, China
  • Year: 2017
  • Images: Courtesy of Margot Krasojević
Solar Sail bridge
Image © Margot Krasojević
Solar Sail bridge
Image © Margot Krasojević
Solar Sail bridge
Diagram
Solar Sail bridge
Diagram
Solar Sail bridge
Image © Margot Krasojević
Solar Sail bridge
Image © Margot Krasojević
Solar Sail bridge
Image © Margot Krasojević

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