JOINT STRUCTURES FOR CONTINUOUS BRIDGE SPAN ASSEMBLIES IN OVER-PIER AREAS Russian patent published in 2007 - IPC E01D19/06 

FIELD: construction of bridges and overpasses, particularly span assemblies.

SUBSTANCE: joint structure comprises composite slab ribbed girders with transversal monolithic reinforced concrete joints and connection slab spaced from girder ribs in over-pier areas. The connection slap is supported by girder ribs in support areas of connection slab ends and is spaced from girder slab along span assembly length. Vertical pads, for instance made of steel and rubber, are laid in the created spaces. The slab is connected to girder slab in longitudinal direction by means of horizontal rods arranged in connection slab and girder slab bodies or in transversal monolithic joints of composite slab ribbed girders and made as a single whole therewith along girder lengths. Horizontal rods in vertical spaces have protective resilient coverings. Connection slab length is to be not less that distance between axes of adjacent girder support areas. In the case of connection slab length insufficient for horizontal rod embedding in it adjacent rods located in single plane are connected with each other. In periods characterized by higher ambient temperature vertical pads are located in lower parts of vertical spaces. In periods with low ambient temperature and in the case of insufficient connection slab length vertical pads are arranged for the full length of connection slab.

EFFECT: reduced construction costs, increased reliability of join structure.

4 cl, 5 dwg