The main bridge of Xiamen Xiang'an Bridge Successful Heilong

On September 12, after the Hong Kong -Zhuhai -Macao Bridge, the second domestic and first full bridge prefabricated cross -sea bridge in Fujian Province -Xiamen Second East Channel (referred to as "Xiang'an Bridge" participated in the construction of the Second Aviation Bureau of China (Xiang'an Bridge " ) The main bridge successfully coexist, laying a solid foundation for ensuring the achievement of traffic.

The Xiang'an Bridge is a key project of Fujian's first demonstration of the transportation country. It is an important part of the "one vertical" of the "six vertical and ten horizontal" planning high -speed road network in Fujian Province and the "two -ring eight -shot" express road network in Xiamen. Xiamen Bridge, Haicang Bridge, Jimei Bridge, Xinglin Bridge, Xiang'an Tunnel, and Haicang Tunnel seventh in and out of the island bridge tunnel cross the sea.

The Xiang'an Bridge project west of the cross -section of Jongzhong Road and Jinshang Road, and eastward to the east of the waters of Xiamen with a continuous beam bridge. Finally, Xiang'an Avenue is about 12 kilometers in length. Essence The cross -sea bridge is a single -frame transition section continuous beam bridge. The main line is constructed according to the standard of two -way 8 -lane highway. The design speed is 80 kilometers per hour, and the design period is 100 years. The prefabrication rate of the bridge pier and steel box beams in the bridge in the bridge is 100%. There are 35 prefabricated pier and 36 steel box beams on the entire line. Among them, the prefabricated pier platform adopts vertical dried sewing and matched pre -system method. It is the second domestic and Fujian Province after the Hong Kong -Zhuhai -Macao Bridge.

The China Communications Second Aviation Bureau undertakes the A2 bidding section of the Xiang'an Bridge with a length of 3,300 meters. The main construction content includes the interoperability project around the East Road of the island, the pile of cross -sea bridge piles, the lower structure and the transportation of steel box beams. Among them, the a2 maritime section of the sea bridge is 2190 meters in length, including 23 pier pier and 24 knots of steel box beams. The overall lifting volume exceeds two -thirds of the entire line.

In order to solve the problem of hanging steel box beams in large sections, the China Communications Second Aviation Bureau independently developed and created a special patch for the entire large section of the large section of the large section of the large section of the wide curve, weighs 560 tons The biggest piano. The pipement through the modular design, add and decrease the complex section on each beam, and open and close through the three hydraulic oil cylinders and guide devices. It can be free to retract and apply various types of steel box beams to change. "At the same time, some node components of the piano use a flexible connection, which can effectively shorten the lifting time and reduce the construction risk.

The main bridge is 72 meters long, 53 meters wide, 3.5 meters high, and weighs about 2197 tons. It is the widest steel box beam section of the bridge. The safety risk is high, the craftsmanship is complicated, the balance, safety of the lifting, safety, safety, safety The accuracy is made higher requirements.

Before Helong, the project team combined with the special structure of the steel box beams in Helong section to optimize the piano to optimize the stress state by increasing the adjustment block to balance the steel box beams; organized the steel box beams to hang the desktop deduction in advance, closely track the transportation dynamics of the steel box beam, deploy the beam beams of the beam beams More than 10 large -scale equipment such as a 4,000 -ton -class steel box beam transportation ship in the same sea in the same waters are used to achieve an anchoring position in the same waters. "It provides necessary conditions for precision cranes for steel box beams.

After the steel box beams of Helong section are located, the project adopts a three -way hydraulic jack. Through the intelligent sensor and the adjustment control system, the adjustment data will be integrated on the information platform, and the millimeter error is finally achieved.

The Heilong of the Xiang'an Bridge realizes that the bridge in the middle of the bridge seas runs through, and the opening of the entire line will go further. After the completion of the Xiang'an Bridge, it will further improve the Haixi Economic Zone Road Network and Xiamen City Road Network, reduce the gap between the islands, promote the development of the regional economic integration of the west coast of the Strait, and accelerate the construction of the “Belt and Road” national logistics channel and the new “Belt and Road” national logistics channel and International comprehensive transportation hub cities are of great significance.

Source: China Water Transport Network

Author: all -media reporter Chen Jialun He Hongpeng Du Cailiang

Responsible editor: Miao Shixiong

Review: Hongbo

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