Construction scheme of Bailey composite steel bridge

The bridge abutments on both sides are constructed first, the site is leveled for steel pipe pile construction, and finally the general beam assembly and welding and bridge deck auxiliary construction are carried out. temporary bridge. (First, remove the river slope protection and the dam)

Main construction process

Construction preparation Construction lofting Construction steel pipe piles Welding pile top I-beam main beams Installation Bailey frame longitudinal beams Welding pile top I-beam beams Laying traffic lanes Anti-skid steel plates Other ancillary facilities.

Measurement stakeout

The position control of steel pipe piles is the key to the measurement and control of the entire bridge. The position of steel pipe piles is set out and measured with a total station. The steel pipe piles on land can be directly released and marked on the ground. The verticality is mainly controlled by the guide frame, the measurement is checked, and the plane position check is carried out by the prismless polar coordinate method. Polar coordinate stakeout, which is displayed as declination and distance. After commanding the position of the steel pipe pile to be aligned with the center line of the prism crosshair, measure the distance with no prism, and instruct the steel pipe pile to move back and forth along a straight line according to the measured data until the position is accurate. The verticality check of the pipe pile can be seen directly with the prism crosshair.