Brief introduction of bridge
Ounan Bridge (the third Aojiang Bridge) is a Wenzhou Ounan Bridge project approved by Zhejiang Development Planning Commission [2006 54 38+0] 193. Its construction address is located between Shengli Road in Aojiang Town, Pingyang County and Wen Wei Road in Longgang Town, Cangnan County, and it crosses the Aojiang River. The project owner is Wenzhou Ounan Bridge Project Construction Headquarters.
It is a vertical open municipal traffic bridge that meets different traffic needs. The main bridge is 408m long and 24.5m wide (including 75.46m openings). The length of the north-south approach bridge is 312.9m, the length of the approach bridge is11.8m, and the width is17m. It is the largest span steel truss (open lifting) open bridge in Asia at present.
Completed and opened to traffic
At the beginning of February 2007, the main span steel beam of Ounan Bridge was ready to be closed.
On the morning of April 29th, 2007, the Ounan Bridge in Zhejiang, which people on both sides of the Aojiang River have been waiting for for 20 years, was finally completed and put into trial operation. Completely running through the banks of the Aojiang River, it began to undertake the important task of personnel and material exchange between Pingyang Aojiang River and Cangnan Longgang. From now on, Ounan Bridge will be free of tolls for passing vehicles.
The Ounan Bridge spans the Aojiang River, one of the eight major water systems in Zhejiang Province, connecting the century-old commercial port, Pingyang Aojiang River, the Pearl of Ouyue, and Cangnan Longgang, the first agricultural trade city in China, with a total investment of 65.438+65 billion yuan. Construction began in July 2003.
The steel truss beam of the main navigation hole of Ounan Bridge is bright orange. According to reports, this steel truss bridge is 75.46 meters long and 24.5 meters wide. It is composed of T-shaped steel beams with different lengths, with a total weight of1100t and a navigable clearance width of 64m. Its two ends are supported on two piers in the middle of the river. These two piers are actually two main towers, 56 meters high. After completion and opening to traffic, the steel truss girder will be integrated with the bridge body for people and vehicles to pass, with a clearance height of about10m, and ships under 300 tons can pass through the navigation hole. According to the change of tide level and passing ships, the daily hoisting of steel truss beams will be irregular. When the passing ship exceeds 300 tons, it is necessary to hoist the steel truss beam to the pier top, with the maximum clearance height of 23 meters, which can meet the one-way navigation of1100t ships. Navigation is started twice a day according to tidal conditions, each time 1 hour.
The completion and opening of Ounan Bridge is undoubtedly a great event for the residents of the two places across the river, which not only brings convenience to cross-strait traffic, but also promotes the coordinated economic development of the liquidation and even the southern part of Wenzhou.
condition
Ounan Bridge has not been hoisted since June 2009 1, due to cost and other reasons. The whole operation time is about 25 months. During this period, it will fluctuate with the change of tidal time, and because of this design, it will increase the original construction cost by 40 million, increase the construction difficulty and extend the project operation time.
It has been more than two years since the lifting of the ban. Running in good condition. Cross-river residents can travel around the clock. At the same time, the maintenance cost is also reduced. Promote cross-strait exchanges.
Yanchang Wenzhou ou south bridge
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