MOTOR ROAD BRIDGE WITH CONTINUOUS REINFORCED CONCRETE SPAN STRUCTURES AND METHOD OF ERECTION THEREOF Russian patent published in 2006 - IPC E01D2/00 E01D12/00 

FIELD: bridge building, particularly span structures for reinforced concrete bridges.

SUBSTANCE: motor road bridge comprises piers and one or several continuous reinforced concrete span structures installed on piers and including ribs extending in transversal span direction. The bridge also has roadway panel and reinforced concrete balustrade. Extreme ribs and balustrade are formed as single vertical load-bearing member. The balustrade is split and has through joints in zero moment zone between piers. The joints divide span structure into above-pier parts arranged in negative moment zone over piers and central parts arranged in positive moment zone. Method of bridge construction involves erecting abutment and intermediate piers; forming temporary piers in area of composite span structure sections connection; mounting span structure sections and grouting thereof. Span structure division into sections in longitudinal direction is carried out in correspondence with bridge division into over-pier and central parts. Central part lengths are equal to that of central parts of span structure. Over-pier section length within the boundaries of reinforced concrete balustrade is equal to over-pier part length, wherein within the bounds of lower rib and roadway panel the length is decreased for value a. The a is determined from prestressed reinforcement rod bundle anchor location conditions and adjacent sections reinforcement joint convenience.

EFFECT: increased load-bearing capacity of span structure, reduced material consumption due to decreased number of span structure beams.

3 cl, 8 dwg, 1 ex, 1 tbl