Temporary bridge

A temporary bridge with several trackways, characterized in that it comprises at least one central span positioned between two end spans, each of said spans comprising at least three bridge elements (3-5) which are intended to be superposed when said bridge is in a first position known as the non-deployed position, said bridge elements (3-5) of each of said spans being articulated to one another, two consecutive bridge elements (3-5) being joined together by at least two linking arms (7-9, 12, 13) which are mounted on one and the same lateral edge of said bridge elements (3-5) between two spans,

• two consecutive linking arms (7-9, 12, 13) form, with the two consecutive bridge elements that they connect, a deformable regular parallelogram so that the movement of one bridge element with respect to a bridge element immediately below it in the stack of one span (1, 2) from said non-deployed position of said bridge causes a circular translational movement of said bridge element with respect to said bridge element immediately below it in said span,
• for at least one of said spans, at least one of said linking arms (8, 12, 13) is common to three consecutive bridge elements, said three consecutive bridge elements being connected to one another by said same linking arm (8, 12, 13),
• said bridge comprises means of moving each of said bridge elements (3, 4) which is superposed on another bridge element (4, 5) in said first position, between this first position and a second position known as the deployed position, in which said bridge elements are coupled together to form said bridge, said movement means comprising two actuators, each of these actuators being positioned at least partially between a distinct end span and said central span, the end of each of said actuators (10) being connected to one of said linking arms (7-9, 12, 13) of at least one of said corresponding spans or to a reinforcing element connecting the corresponding end span and the central span.