Cable-Stayed Bridge (span 375 meters) Across the River Vistula, Poland
Roadway bridge across the River Vistula in Plock in Poland - 1st prize at an anonymous international competition.
The total length of the bridge is 1200 meters, of which 615 meters is the length of the main part of the bridge over the Vistula riverbed and 585 meters the length of the access part of the bridge above the inundation basin. The main bridge structure is a symmetrical steel structure, a cable-stayed bridge, composed of: a continuous girder (with 2 x 60 + 375 +2 x 60 meter spans), cable stays and two pylons.
The bridge girder has a torsionally stiff three-cell cross section of trapezoidal shape, (height 3.5 m, lower plate width 13.0 m, upper plate width 16.5 m), cantilever arms 5.5 m wide. The pylons to which the cable stays transmit their tensile force are made of steel and fixed in the girder of the bridge. The cable stays are placed in the central, vertical plane of the bridge, in what is referred to as modified harp distribution. Each cable stay consists of two individual cables (ropes), at axial distance of 750 mm.
The bridge has an approach structure in the composite system with two continuous girders on 5 spans (height: 3.0 m), with spacing between piers of 58.5 m.
The bridge bearings are neoprene – teflon. The piers of the bridge are made of reinforced concrete, rounded in shape, with clearly differentiated parts: head, shaft, and base of the pier.
The record span of 375 meters is among the largest spans in the world for cable-stayed bridges with cables in one, central plane.
The bridge is under construction and will be open for traffic in the year 2005.