49.6 meters!The world's widest public railway two -use Duta Cold Bridge main crossing dragon

Jimu Journalist Ma Qingni

Correspondent Xie Zhen Meng Qinghu

At 10:18 on September 5th, the key project of the Guangdong -Hong Kong -Macao Greater Bay Area, which was invested by Guangzhu City Company, the design of the Fourth Court of China Railway Council, and the China Railway Bridge Bureau -the main cross -steel beam successor of the Golden Hait Bridge of the Pearl Macao City Essence As the world's first public railway, the same -layer Daga Cold Bridge, the Jinhai Bridge also created the world's record of the widest public iron dual -use Deta cable bridge with a 49.6 -meter bridge surface width.

Bridge aerial photography

The Golden Hait Bridge of Zhuji City is 1369 meters in length. It starts from Zhuhai Hengqin New District, across the West River Mo Daomen Waterway, and finally to the East Road of Zhuhai Airport. For the first time, the bridge adopts the multi -tower -rigid structure system of the public railway dual -use cable bridge structure. The main span of the four -tower cable bridge of the same layer of the public railway with 3 × 340 meters, the double -line intercity railway in the middle A two -way six -lane highway for 100 kilometers/h.

"Accuracy control is the biggest work difficulty in the Heilong stage. The accuracy error of Helong must be controlled within 1 mm." Chen Xiaojian, deputy general manager of the Five Company of the China Railway Bridge Bureau and the manager of the Jinhai Bridge project, introduced that the temperature was 20 to 25 degrees during the manufacturing of the bridge. At night, the temperature of the steel beam is 28.5 to 32 degrees. Because the pier on both sides is the tower beam pier solid, it is affected by thermal expansion and contraction, which makes the width of the Heilongkou smaller than the manufacturing length of the Helong section. To this end, the project team applied to the top force by adopting the method of the top device at Helongkou to adjust the longitudinal gap to offset the elongation of the temperature difference. At the same time, the corner and elevation of the two ends of the dragon mouth is fine to ensure that the rushing nails can be smoothly inserted, and the high -precision Heilong is finally achieved.

Heilong Live

It is reported that the steel structure of the Jinheter Bridge consists of 4 steel main tower, 8 large sections of steel beams, and 39 standard steel box beams (including 3 co -dragon blocks), with a total of 52,000 tons of steel beams and steel towers. Among them, the main tower of four steel and 8 large sections of steel beams are independently designed by the China Railway Bridge Bureau. The largest and highest rising heights of the armier rack "Bridge Seagull" 3,600 tons of heavy bakers.

Different from the construction of the ordinary bridge tower, the Jinhai Bridge steel tower is installed with overall vertical rotation in the air. The entire vertical transfer process is divided into 73 steps in order to turn the horizontal steel tower 90 degrees, and the attitude is like "ballet" in the air. The manufacturing of the bridge steel box beams has the characteristics of "large -scale, factory, standardization, and assembly". The steel box beam is manufactured as a whole in the factory. It is transported to the bridge site through water and then adopts the overall installation of the "Bridge Seagull". "Compared with the section of the score section, the entire section of the section will turn high -altitude operations to low -altitude operations, and on -site operations to factory operations, which effectively ensure the quality of the project, reduce the risk of water and high -altitude operations, and shorten the construction period for more than half a year." Chen Xiaojian said.

The bridge started in April 2018. Since the construction of the construction, it has faced many typhoons and high -temperature rainstorms, and many difficulties brought about by the epidemic. The spirit of hard work and dedication, successfully complete the goals and tasks of each node. At present, the bridge has fully entered the construction stage of the bridge deck, ensuring that it will enter the rail paving project in October and meet the traffic conditions next year. At that time, only 10-15 minutes from Zhuhai Jinwan to Hengqin, only 25 minutes from Zhuhai Airport to Gongbei, will greatly shorten the transportation time in the main urban and western urban areas.

It is reported that the intercity rail transit project from Zhuhai to Zhuhai Airport to Zhuhai Airport is located in Zhuhai Airport. This project is an important part of the Pearl River Delta rail transit network. Essence After the completion of the project, it is conducive to achieving a convenient connection with the Macau light rail, effectively alleviating the pressure of passing people, and innovating the clearance model of the port. It is of great significance to integrate the national strategy of integrating the Guangdong -Hong Kong -Macao Greater Bay Area and integrate into the Guangdong -Hong Kong -Macao Greater Bay Area.

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