Bridge construction

Details Bridge construction Bridge construction

E - Fixed Constructions

01

D

94/29, 14/9, 20/

E01D 21/00 (2006.01) E01D 11/00 (2006.01) E01D 11/04 (2006.01) E01D 19/14 (2006.01)

Patent

CA 1311094

- 1 - Abstract The invention relates to a method of constructing a cable-stayed bridge extending between at least three towers. Initially, a horizontally extending truss spanning from a first tower to a second tower is moved longitudinally to be projected from the second tower to a third tower. The truss is then elevated. A plurality of stay cables are then strung from an elevated location on the second tower to a series of temporary connections to the truss on both sides of the second tower. A deck portion is then constructed on the truss on both sides of the second tower, and the cables that are not connected to the truss are connected to this deck portion. Finally, the cables are disconnected from the truss and the truss and hence the deck portion are lowered, causing the cables to support the weight of the deck and to acquire the desired tensional stresses. The procedure is faster than hitherto known methods of constructing this type of bridge. The truss, which could be used to aid in the construction of any bridge over a body of water, has air filled tanks that can be moved vertically. This enables the tanks to be lowered and submerged in the body of water to provide upward supporting forces on the truss while it extends between the towers.

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