The reporter learned from the Provincial Transportation Engineering Construction Bureau that at 2:43 today, the first expressway swivel bridge in Hainan Province, the Haikou Ring Expressway from Meilan Airport to Yanfeng, crossed the Hainan roundabout high-speed railway swivel bridge successfully swivel , this move marks a significant progress in the construction of the project.
Photo courtesy of Provincial Transportation Engineering Construction Bureau
The main line from Meilan Airport to Yanfeng of Haikou Ring Expressway is 15.07 kilometers long. The airport on the east side of the bridge is connected to the airport, turning south in the form of a ramp, the end point is , Yanfeng Town, , the main line is , two-way six-lane , and the design speed is 100 kilometers per hour.
Photo courtesy of the Provincial Transportation Engineering and Construction Bureau
The high-speed rail swivel bridge across the Hainan roundabout is located at the Meilan Airport, and the traffic organization is complex. The body beam is 170 meters long, with a single frame weighing 13,000 tons and a total weight of 26,000 tons.
It is reported that this is the first expressway swivel bridge in Hainan Province. It is difficult to construct and is a key control project on the whole line. It is also the T with the largest span, the highest technical difficulty, the largest seismic fortification intensity and the largest total swivel weight in Hainan Province. Swivel bridge. In order to reduce the impact on the operation of the existing high-speed railway during the construction process and reduce the construction safety risk, the beam body T structure is first cast-in-place using the parallel railway cantilever casting method on both sides of the railway, and then the jack , ball hinge bearings, upper and lower Combined traction swivels such as turntables.
In order to ensure the safe and stable operation of the bridge rotation, under the guidance of the Provincial Department of Transportation and the Provincial Transportation Engineering Construction Bureau, the construction team set up a scientific and technological research team, compiled a detailed rotation plan and a safety risk plan, and repeated simulation calculations. At the same time, strengthen communication with the railway department and apply for the "skylight point" for swivel construction.
Photo courtesy of Provincial Transportation Engineering and Construction Bureau
The swivel started at 1:18 today. The swivel structure with a total weight of 26,000 tons on both sides of the railway line was pulled in series by the jack group and turned counterclockwise, rotating 75.5° respectively. And 89°, which lasted about 85 minutes, smoothly "turned" to the predetermined position, achieved precise aerial docking, and made significant progress in the project construction.
It is understood that the Meilan Airport to Yanfeng section of the Haikou Ring Expressway is the first major transportation infrastructure project in Haikou Jiangdong New Area. After completion, it will improve the comprehensive transportation hub function of Haikou City and enhance the interconnection of the expressway network in Hainan Province. It is of great significance to realize the effective connection and rapid transformation of transportation modes such as highways, waterways, railways, and aviation, as well as to promote the integrated development of "Haikou Economic Circle" and the construction of Hainan Free Trade Port.
[Source: Haikou Daily Rong Media]
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