The Shenzhen-Zhongshan Channel officially opened to traffic
Release time:
2024-07-01
On June 30, the world-class cross-sea cluster project, after 7 years of arduous construction, was fully opened to traffic. The Shenzhen-Zhongshan Channel has been completed, connecting the golden inner bay. Shenzhen and Zhongshan have officially entered the "same city moment", and travel between the east and west banks of the Pearl River Estuary no longer needs to detour via the Humen Bridge, with travel time shortened to within 30 minutes.
On June 30, the world-class cross-sea cluster project, after seven years of arduous construction, was fully opened to traffic, connecting the golden inner bay of the Shenzhen-Zhongshan Channel. Shenzhen and Zhongshan officially entered a "same-city moment," eliminating the need to detour via the Humen Bridge for travel between the east and west banks of the Pearl River Estuary, reducing travel time to within 30 minutes.
The Shenzhen-Zhongshan Channel is a world-class cross-sea cluster project integrating bridges, islands, tunnels, and underwater interchanges. It is 24 kilometers long, with a total bridge length of approximately 17 kilometers. In April this year, the bridge project of the Shenzhen-Zhongshan Channel successfully passed the load test and received the "George Richardson Medal" from the International Bridge Conference, known as the "Nobel Prize" in the bridge engineering field.
The Shenzhen-Zhongshan Channel project is large in scale and has high comprehensive construction technical difficulty, making the construction process challenging. To solve the problem of anchor construction in the fully offshore marine silty area of the Shenzhen-Zhongshan Bridge, the project team of the China Communications Second Harbor Bureau proposed a self-balancing flexible cofferdam of "lock-bolt steel pipe piles + I-shaped sheet piles + parallel steel wire ropes," achieving rapid island formation in 45 days and setting a precedent for the construction of large-span suspension bridge structures in wide sea areas.
"Anchors, like large weights, are deeply embedded in the sea. The two anchors on the east and west sides jointly bear the tension of the main cables and steel bridge deck. We use diaphragm wall construction to break through the weathered rock layer at the bottom of the bridge, and the anchors located on the hard rock layer can form a more stable structure." said Xiao Wenfu, the technical director of the Shenzhen-Zhongshan Channel project of the China Communications Second Harbor Bureau.
"The summer months are the active period for tropical cyclones and typhoons in the Greater Bay Area. Considering the safety of the upper structure construction, it is necessary to ensure that the main bridge is closed before the typhoon strikes." introduced Yang Guangwu, a senior expert from the China Railway Major Bridge Engineering Group Co., Ltd.
The design team innovatively adopted technologies such as "ultra-wide steel box girder design," "ultra-wide steel box girder erection," and "pre-tensioning of inclined cables and phased welding of main girders," successfully solving the technical problems of large deformation during main girder erection and small space for inclined cable tensioning, ensuring the smooth closure of the Zhongshan Bridge.
During the construction of the bridge foundation platform, China Communications Second Highway Bureau adopted a modular design of prefabricated drilling platforms, enabling assembly and disassembly as needed, greatly reducing material loss. The project team significantly improved construction efficiency and quality through numerous innovations and optimizations of the construction technical scheme.
The completion of the Shenzhen-Zhongshan Channel will greatly accelerate the overall development of the Guangdong-Hong Kong-Macao Greater Bay Area. Shenzhen and Zhongshan, as core cities of the Guangdong-Hong Kong-Macao Greater Bay Area, are located at important nodes in the region, and their development level and influence directly affect the prosperity of the entire bay area. With the goal of "building a world-class sustainable cross-sea channel and creating a century-old gateway project for the Greater Bay Area," the Shenzhen-Zhongshan Channel has achieved multiple innovations and breakthroughs, contributing the Shenzhen-Zhongshan model, Guangdong experience, and China's solution to world cross-sea channel engineering.
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