Overall Scheme Design of Bridges in Ring Ⅰ Expressways of Zibo
The overall scheme design,bridge structure design and key technology application of bridge in Ring I Expressways in Zibo are introduced.Based on the local construction conditions of Zibo,an overall design scheme of the prefabricated and assembled bridge structures such as prestressed small-box beams and composite beams is proposed for all superstructures.The double-side box composite beams and composite decks are used in the interchange area to solve the problems in the prefabrication and assembly of interchanges.The steel index used in the light composite steel plate beam structure in the demonstration construction is only 150 kg/m2.And also the composite beams of modular fold beam bottom are adopted.Various forms of composite beam for the main line and interchange enrich the structural forms of industrial bridges.The streamlined bent caps,concealed blocks and concealed drainage pipes are used for the bridge piers and the deeply buried anchoring technology is used for the bent caps to form a unique appearance of the bridge.The relevant practical experience can be referred to similar urban viaducts.
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