Bridge rotating construction refers to a construction method in which the bridge structure is made and shaped at the off-design axis position and then rotated in place. It can transform obstacle-crossing operation into onshore or near-ground operation.

Mainly used for crossing canyons, rivers, railways, highways and other unsupported occasions. The swivel system of swivel bridge consists of lower turntable, upper turntable, ball hinge, slideway and traction system. In the process of turning, the traction cable is pulled by the jack to form a turning couple to realize turning.

Extended data

In the early morning of July 30th, 20 19 1: 35, the main bridge of the cable-stayed bridge took 68 minutes to turn, and it successfully turned 52.4 degrees, setting a new world record for bridge turning with a turning weight of 46,000 tons and a span of 263.6 meters.

The swivel bridge crosses the Beijing-Guangzhou railway artery 265 and 438+0 railway lines from north to south. The swivel construction adopts the international leading double swivel technology of sub-tower and mother tower to minimize the impact of bridge construction on traffic.

The diameter of the swivel ball hinge used in the swivel of the main tower is 6.5 meters, and the split structure design is adopted for the first time, which completely breaks the traditional integral ball hinge structure.

Therefore, the project team successfully realized the high-precision machining and installation of the super-large tonnage split spherical hinge through computer simulation process analysis and the design and application of auxiliary tooling, which ensured the smooth and accurate rotation of the bridge.

Baidu encyclopedia-zhuanzhuan bridge