TUNNEL TYPE BRIDGE Russian patent published in 2006 - IPC E01D18/00 

FIELD: bridge building, particularly to build tunnel bridges.

SUBSTANCE: bridge comprises span structure, approach slopes and abutments made as support walls including backwall and support platform with bearing parts moving in all directions. Span structure is made of beams installed at predetermined intervals and supported by bearing parts. The beams are connected one to another in upper parts thereof by reinforced concrete roadway panel. The span structure is divided into several gripping parts across the span structure width. The gripping parts move one relative another in horizontal plane and have transversal diaphragms dissymmetrical relative longitudinal bridge axis. The diaphragms unite several span structure beams and are provided with rests located at diaphragm ends. Mating rests are installed on one support wall platform to cooperate with diaphragm rests. Tangential bearing parts are arranged on the mating rests in rest joint area and on backwalls in interfacing area between backwall with span structure ends, wherein the bearing parts may move in all directions.

EFFECT: simplified bridge structure due to elimination of moving joints forming.

3 dwg