"Ballet dancing" in the air of 14500 ton bridge Xiaogan North crossing Beijing Guangzhou railway interchange

At 14:35 on December 12, after a 75 minute "leap" in the air, the 14500 ton dasui-hanshi section of Wuhan city circle ring expressway (referred to as "Xiaogan north section") across the Beijing Guangzhou railway overpass project successfully realized the air turnaround.

Beijing Guangzhou railway is a national class I passenger and freight railway connecting Beijing and Guangzhou, connecting North China, central and South China in series, which is one of the three horizontal and five vertical trunk railway networks in China. At the intersection of

Beijing Guangzhou railway and North Xiaogan section, there is an average of one train passing every five minutes. It is difficult to build a railway bridge here with high technical difficulty and safety risk. In order to minimize the impact on railway transportation, the bridge is constructed by turning and erecting. During the construction, the left and right beam bodies are poured along the railway direction on both sides of the railway, and the turntable is set in the middle of the bearing platform under the pier body in advance, then the beam body is pulled to turn by the turning device such as Jack, steel strand and so on, and finally cross the railway. The north section of

Xiaogan is a key project of the provincial ” 12th Five Year Plan ”, and is the first batch of ” escrow + epc” integrated management project of Hubei Communications Investment and construction group. It starts from Yangzhai Town, Guangshui City, connecting with Dazong section of Mazhu expressway, connecting with the south section of Xiaogan section of Wuhan City Circle Expressway, crossing three railways, namely Beijing Guangzhou, Anwei and Handan, and has three railway bridges, At present, one swivel construction and one cast-in-place construction have been completed, and the other is expected to be completed by the end of December, when the main line of Xiaogan North Expressway will be connected. A 6031 a 6031 extended reading: a 6031 a 6031 turning bridge method is a bridge construction method, referred to as turning bridge, which is mainly used for crossing rivers, railways, expressways and other situations that can not be supported, or is not suitable for long-time operation above. For example, the Xiaogan north project crosses the Beijing Guangzhou railway overpass. In order to reduce the interference to the railway, the turning method is adopted for construction. In the construction of

railway crossing bridge, a 57 + 57M T-frame box girder with full support is first erected on the east side of the railway line to form a T-frame. After the T-frame is formed, the girder rotates 63 degrees in the air and is in place. Finally, a 3M closure section is cast at both ends to achieve closure.