Abou Tesht Bridge

Client: GARBL Scope: Structural Design Location: Qena, Egypt

The bridge is 550 m long with a 19 m span, adding a 300 m long bridge ramp. The first four spans represented in axes (A1, P1, P2, P3 and P4) are RC box girders cast in situ with three vents, which are supported on end diaphragm beams. The span of each box is equal to 25 m long. The diaphragm beam is connected monolithically with the RC column, except for the beams on axes A1 and P4, which are not monolithic with the column; instead, they rest on neoprene pads. The diaphragm beam on axis A1 is rested on the RC retaining wall. The superstructure of the first four spans consists of box girder beams with a thickness equal to 1600 mm. Slabs, measuring 250 mm and 200 mm in thickness, connect all box beams from top to bottom. The thickness of the box top slab increased at the box webs from 250 mm to 450 mm. At the box webs, the thickness of the bottom slab increased from 200 mm to 400 mm. All box webs are linked by end diaphragm beams that are solidly attached to the RC column, which measures 2000 x 2000 mm at the pile cap and increases to 3250 x 3250 mm where it connects to the end diaphragm beam. Each column rested on pile caps with variable thicknesses.