According to the "skylight point" approved by China Railway Jinan Bureau, on June 9, 165438, the second bid section of Jining Inner Ring Elevated Project began to turn the bridge in the relevant railway section. At 1: 30 in the morning, the rotating bridge weighing18,000 tons was pulled by two jacks and began to rotate slowly in the night sky in early winter. After wandering in the air for 30 minutes by rotating 82 counterclockwise, the bridge successfully crossed the Xinyan Railway and met the pier base opposite the railway. This is also the first railway-related bridge swivel construction in Jining city. The single swivel bridge is the heaviest and has the largest swivel range.

▲? Before turning

■? The main span 120m of the swivel bridge constructed by China Railway 25th Bureau Group, and the main pier is located on the north side of Xinyan Railway. The bridge deck is 29.9m wide and120m long. The bridge has a large weight and a large slewing range, which requires high technical standards such as swivel closure accuracy and straightness. In order to ensure the safe and smooth rotation of the bridge, the construction party and the expert group made a scientific construction plan, used steel bars to bind the jig frame, used qualitative steel formwork, and completed one-time pouring on the precast pedestal, and installed an automatic sprinkler system in the box girder precast area to automatically and regularly maintain the precast box girder to ensure the quality of the box girder.

▲? After turning

■? According to the requirements of Technical Specification for Construction of Highway Bridges and Culverts (2020 Edition) issued by the Ministry of Transport, this swivel has changed the previous mode of relying on GPS measurement in bridge body measurement and positioning, and tried to integrate the measurement data by using Beidou satellite navigation system, which greatly improved the signal strength and ensured the accuracy of docking between swivel beam and pier.

▲? in turn

■? This successful turnaround is the phased achievement of winning the whole year's battle in the fourth quarter of the second bid section of the Inner Ring Elevated Road, which is the same as the whole project sprint. Recently, all sections of the inner ring viaduct are sticking to the goal of opening the main line at the end of the year. With a sense of urgency, it can't escape, can't afford to lose, can't sit still, it runs, jumps up, feels high above the ground, its hoof moves steadily, exerts its strength one after another, and advances node by node. 65438+1October 15 and 16, Jining Avenue and West Outer Ring Road respectively cross the Beijing-Hangzhou Canal Bridge, and 65438+1October 18 completed the substructure construction of the whole project.165433. At present, asphalt pavement has been fully started in the construction of the main bridge deck system of the whole project. 10 asphalt mixing station, 200 transport vehicles fired in an all-round way, and 654.38+10,000 cubic meters of asphalt paving operation was launched in an all-round way. Expansion joint construction, lighting installation and road marking followed closely, and the main line was opened to traffic at the pace of landing.

■? Vice mayor, Wu, deputy general manager of China Railway 25th Bureau Group, etc. Observe and guide the rotation of the bridge in the second bid section of the inner ring elevated bridge.

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