Key Technologies for Design&Construction of East Main Bridge of Fengpu Bridge in Shanghai
To relieve the current traffic pressure,the water pier foundation of the main bridge on the east side of Shanghai Fengpu Bridge has been used for the continuation of Fengpu East Bridge.The span combination of the main bridge of Fengpu East Bridge is(85.15+125.00+ 125.00+125.00+85.15)m.The upper structure is a prestressed corrugated steel web continuous beam bridge,and the lower structure is a thin-walled hollow vertical pier.The main beam is a single box with double chamber section,and the box adopts the mixed arrangement of steel diaphragms and steel cross braces.The No.0 segment at the pier top is of steel-concrete composite structure,and a stud connector is set between the steel box and the concrete slab.The peripheral stud is wrapped with a rubber sleeve to avoid stress concentration.The whole bridge web is made of 1 600 corrugated steel plate.To improve the stability of the webs in the middle fulcrum section,T-shaped stiffeners are set along the longitudinal direction,without the need for cast-in-place concrete lining.A double perforated plate connector is used between the corrugated steel web and the concrete top plate,and a plum blossom shaped opening structure is added at the front end of each section,and welding studs are mixed to improve the stress of the connector;the web plate and concrete base plate adopt the flange joint of welded angle steel.The superstructure of the main bridge adopts the construction technology of industrialized segmental prefabrication and on-site cantilever assembly,which improves the construction efficiency and safety.
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