Padma Multipurpose Bridge Project

2.3.1 Main BridgeFigure 2-3: Sub-components of the Project11. The main purpose of the main bridge over the Padma is to allow smooth crossing of road and railtraffic and take the full benefits of integrated uninterrupted fast communication network. It has thefollowing key features/characteristics:The total length of the bridge is about 6.15km of 22.5m width; the bridge will havehorizontal and vertical curves with vertical gradient being 4% for pavement and 0.5% forthe future railway.Two level composite steel truss of multiple regular spans each of 150m across thePadma River. The deck cross-section consists of a concrete top slab connectedcompositely to the upper chord of a steel truss;The two-level superstructure carries dual two lane carriageways with hard shoulders atthe upper level and the provision of a single broad gauge railway track at the lower level(Figure 2‐4); andThe superstructure of the bridge will be supported on concrete piers at 150m spacingthat will have deep pile foundations.2-7