FLOATING RAILWAY BRIDGE Russian patent published in 2000 - IPC

FIELD: bridge engineering; floating bridges used for passing trains, wheel-track road engineering at destruction or reconstruction of bridges across wide and deep interceptions. SUBSTANCE: bridge has pontoons joined together in longitudinal and transverse direction by deck and bottom hitch- mechanisms, as well as railing of track. Novelty is that bridge is built up of intermediate pontoons over its length in waterside and transition sections and of intermediate and extreme pontoons river sections that form band; it is also provided with intermediate lifting poles with girders in waterside and transition sections. Transoms of medium pontoons are supplied with supporting brackets hinged to slab over girders of intermediate poles on each side of waterside and transition sections and in river sections on side facing transition sections. Slab width amounts to total width of two intermediate pontoons; longitudinal bay is formed in deck of each intermediate pontoons. Longitudinal bay axis is spaced from pontoon side facing way axis through distance S that makes up 0,28-0,38 of intermediate pontoon width. Two longitudinal bays are provided in slab of each supporting bracket which are coaxial to bays of intermediate pontoons adjacent to them in transversal direction. Track rails are installed in longitudinal bays of intermediate pontoons and in slab of supporting brackets; they are mounted for relative transverse displacement to change track gage; rail heads are arranged flush with deck of intermediate pontoons and top of supporting bracket slab. EFFECT: improved engineering and operating characteristics; reduced material input, facilitated mating of bridge railway to approach tracks. 4 cl, 13 dwg