Shulou(Shulou.com)11/24 Report--

CTOnews.com, November 22, according to the China Railway Construction News, in the early morning of November 22, the first super-wide and extremely asymmetric steel beam turnaround bridge in China-- Shanghai Caobao Expressway Jiamin Interchange, which was designed by the fourth Railway Academy and built by China Railway 24 Bureau, was completed, setting a new world record for a number of turnaround bridges, such as three-dimensional asymmetry, the widest deck, and the widest turnaround across the high-speed railway.

According to reports, the bridge has created a new record of "super-integration, super-width, super-conventional, super-large angle".

With regard to "super integration", the design team of the fourth Railway Hospital adopted the whole T structure of the box girder, and the bridge deck simultaneously met the requirements of the plane and elevation conditions of the five interchanges, and had super line integration ability and road dredging ability.

With regard to "ultra-width", the plane of the main bridge is a special-shaped curve, the turning weight of the bridge is about 15800 tons, the minimum width of the bridge deck is 40.5m, the widest part is 99.3m, and the maximum height difference at the end of the bridge beam is about 12m. It is the first ultra-wide asymmetric T structure at home and abroad.

With regard to "supernormal", the design team set up a temporary lattice cable tower at the location of the main pier to solve the problem of ultra-wide and ultra-high special-shaped three-dimensional asymmetric structure.

With regard to the "super-large angle", the bridge crosses seven railway lines from east to west and can rotate 110 degrees clockwise as a whole.

The T-frame rotating bridge of continuous steel box girder in the new project of Caobao Road Expressway is an ultra-wide and ultra-high special-shaped three-dimensional asymmetric (extremely asymmetric) structure. It is 190 meters long, the beam width gradually changes from 40.5 meters to 99.3 meters, the beam height is 8.2 meters, the maximum longitudinal slope of the bridge deck is 6.04 percent, the center of gravity is 8.7 meters away from the center of the pier, and the maximum height difference between the two ends of the bridge is more than 12 meters.

In the process of rotation, through a set of two synchronous automatic continuous traction equipment, the end of the beam is controlled to rotate slowly at a rate of 1.03 degrees per minute, and the bridge rotates 106.3 degrees in the "skylight point" of 210minutes to accurately dock the piers on both sides of the railway. reach the designated position of the design.

CTOnews.com learned that the new construction project of Caobao Road Expressway is a major transportation project in Shanghai's 14th five-year Plan, starting from Jiamin Viaduct in the west and Guiping Road in the east, with a total length of about 7.18km through Songjiang, Minhang and Xuhui districts. After the completion of the project, it will quickly connect Hongqiao Business District with the south of the main urban area, effectively alleviate the traffic pressure of Yan'an West Road Viaduct-Huqingping Expressway, support the sustainable development of Hongqiao Business District, and further build the backbone road system in the main urban area of Shanghai.

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