COLLAPSIBLE BRIDGE OVER SMALL RIVERS Russian patent published in 2025 - IPC E01D15/12 

FIELD: construction of bridges.

SUBSTANCE: invention relates to bridge construction and can be used in erection of collapsible bridges with girder span structures through small rivers with width of up to 25.0 m with stable indestructible channel. Collapsible bridge over small rivers contains the first, intermediate and terminal span sections, each of which is made with length of 5.0 m and width of 4.5 m, is equipped with telescopic supports, It includes stiffness beam and roadway plate with ledge of roadway plate 0.5 m to the side opposite to bridge assembly direction, coastal retaining cables, two gangways connected to the first and terminal span sections, respectively. Main bearing elements of each telescopic support comprise a housing with a mounting flange, a lower, internal and external intermediate sleeves, made in the form of hollow cylinders of the same height and equipped with toothed bushings, retaining ring installed on the lower end of the housing, a pusher, lifting screws, a mounting cage with a mounting sleeve with a height of each of them equal to 0.2 of the height of the housing, and with a tetrahedral head on the upper end of each of them, a support plate made in the form of a rectangle with an oval shape of its sides located perpendicular to the axis parallel to the axis of the span section, with ends bent upwards, crosswise thrust is rigidly attached to the telescopic support housing perpendicular to the axis of the first, intermediate and terminal span sections, respectively, and is directed after erection of the bridge to the axis of the span sections, as well as flexible links fixed on the support plate and the mounting flange.

EFFECT: faster erection of a bridge across small rivers and possibility of its multiple use.

9 cl, 19 dwg