BRIDGE METAL FRAMEWORK WITH CONTINUOUS WELDED RAILROAD TRACK

摘要

FIELD: bridge construction; in particular, structures of bridge metal framework with continuous welded railroad track. SUBSTANCE: bridge metal framework has two primary trusses braced with each other and resting on supports through movable and fixed bridge bearings, bridge floor consisting of ballastless bridge floor proper in the form of reinforced concrete blocks with rails secured thereto and longitudinal beams bolted to transverse beams in units of track chord of primary trusses. Blocks on section I of framework are rigidly secured to longitudinal beams and blocks on section II are laid on longitudinal beams through pads of antifriction material with arrangement on lower surface of block of metal embedded part provided with limiters. EFFECT: reduced longitudinal forces in rails of continuous welded railroad track developed by combined action of framework and rails due to variations of ambient air temperature and nonadmission of large gaps in points of accidental breakage of rails. 4 dwgo