On June 30, the Shenzhen-Zhongshan Corridor was opened for trial operation. After 7 years of hard work by the builders, the construction of the world-class cross-sea cluster project has been successfully completed, the whole line has been opened to traffic, the Shenzhen-Zhongshan Passage has opened up the golden inner bay from "Y" to "A", Shenzhen and Zhongshan have officially entered the "same city moment", and the east and west banks of the Pearl River Estuary can no longer detour to the Humen Bridge, and the driving time is shortened to less than 30 minutes.
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The Shenzhen-Zhongshan Passage is a key control project of the national highway network G2518 across the Pearl River Estuary, about 30 kilometers away from the Humen Bridge in the north and about 31 kilometers away from the Hong Kong-Zhuhai-Macao Bridge in the south. The world-class cross-sea cluster project, which integrates bridges, islands, tunnels and underwater interconnection, has a total length of 24 kilometers and a total length of about 17 kilometers.
The Shenzhen-Zhongshan Bridge is one of the key control projects of the Shenzhen-Zhongshan Corridor, with a total length of 2,826 meters and a main span of 1,666 meters, which is one of the key and important control projects of the Shenzhen-Zhongshan Corridor. The height of the two main towers is 270 meters, the height of the bridge deck from the sea is 91 meters, and the navigable clearance is 76.5 meters. The two anchor blocks of the bridge each adopt two "8" shaped ground wall foundations with an outer diameter of 65 meters, and the total weight of a single anchor block is about 1 million tons. The bridge has set five world records, including the largest span of steel box girders, the highest navigable clearance, the largest anchorage volume in the sea, the highest strength of the main cable wire, and the highest wind speed in the flutter test.
In April this year, the bridge project of the Shenzhong Passage passed the load test with a high score, and won the reputation of "Nobel Prize" in the bridge industry and the "George" awarded by the International Bridge Conference. Richardson Award", showing the industry's affirmation of the internal quality and external quality of the Shenzhen-Zhongshan Channel. In order to better distinguish the location and facilitate future operation and management, each key structure of the Shenzhong Corridor has its own name. Fan Chuanbin, deputy director of the Shenzhen-Zhongshan Channel Management Center, introduced. According to the Regulations of Guangdong Province on the Administration of Geographical Names, the Shenzhong Corridor spans the Pearl River Estuary, and the suspension bridge and undersea tunnel as key structures are named "Shenzhong Bridge" and "Shenzhong Tunnel" respectively, which is in the same vein as the name of the whole line.
Since the start of construction, the project team has fully mobilized resource elements, strengthened on-site management, carried forward the spirit of hard work, and completed the construction tasks safely, with high quality and efficiency, in order to ensure the steady progress of the project.
- In order to solve the problem of anchorage construction in the offshore marine silt area of the Shenzhen-Zhongshan Bridge, the project team of CCCC Second Harbor Bureau proposed a self-balancing flexible cofferdam of "locking steel pipe pile + I-shaped sheet pile + parallel steel wire cable", which realized the rapid formation of an island in 45 days, and created a precedent for the construction of a large-span suspension structure system bridge project in a wide sea area.
- In order to reduce the labor intensity of workers and improve work efficiency, the research and development and application of the first integrated intelligent tower building machine in China, the construction speed of the tower column can reach up to 1.2 meters per day, reducing the number of high-altitude operators by nearly 60%, and the innovative research and development of integrated intelligent tower building equipment and complete sets of construction technology has been achieved The traditional construction technology of the ultra-high concrete bridge tower has been upgraded to industrial construction technology, replacing labor with machines, moving the factory facilities to the construction site, and integrating industrialization, intelligence, informatization and standardization into the bridge construction. It will once again bring revolutionary transformation and upgrading results to the construction of bridge ultra-high cable towers;
- In view of the ultra-wide and oversized steel box girder segments and complex structural forms, an 850-ton intelligent cable crane was developed and constructed, which solved the problems of poor synchronous stability of lifting of box girder segments of large-tonnage and long-span suspension bridges, and the problems of unguaranteed lifting capacity and lifting speed.
At the beginning of the project, the project was formulated to build a demonstration of "Ping An Centennial Quality Project" and a major project benchmark of "transportation power" and "quality power", fully implement modern project management, actively promote industrialization and intelligent construction, vigorously implement technological innovation and process innovation, etc., and successively build key technologies for super-large span suspension bridges in the offshore sea, and rapid island building technology for large-scale anchorage anchors in the wide sea area. Major breakthroughs have been made in the fields of concrete bridge tower reinforcement parts and intelligent tower construction, filling the gap in the industry, and promoting the high-quality construction of the project with high quality, high precision and high efficiency.
The Shenzhen-Zhongshan Corridor connects Guangzhou-Shenzhen Yanjiang Expressway, Jihe Expressway and Guangzhou-Shenzhen Expressway in the east, Zhongkai Expressway, Guangao Expressway and Zhongshan Eastern Outer Ring Expressway in the west, and connects with Nanzhong Expressway (under construction) and Nansha Port Expressway.
After the opening of the Shenzhen-Zhongshan Corridor, drive eastward from the Zhongshan side, pass through the Shenzhen-Zhongshan Bridge and the undersea tunnel, and set up the first high-connection high-ramp in the tunnel under the water, and connect to the Guangzhou-Shenzhen Yanjiang Expressway after exiting, which can go to Humen, Qianhai and Hong Kong; After driving straight out of the undersea tunnel, the first toll station exit can go to Shenzhen Airport and Shenzhen Bao'an District; The independent line goes straight and connects to the Jihe Expressway, which can go to Shenzhen City, Longgang District, Huizhou, etc.; After going forward, you can transfer to Guangzhou-Shenzhen Expressway and go to Shenzhen City or Dongguan.
Reporter Zuo Jian, correspondent Wang Xinzhou, photographer Du Cailiang