On the 30th, the world-renowned super project, the Shenzhen-Zhongshan Corridor, was officially opened for trial operation. This is the world's first cross-sea cluster project integrating "bridges, islands, tunnels and underwater interconnection", with a total length of about 24 kilometers, and the driving time from Shenzhen to Zhongshan will be shortened from about 2 hours to 30 minutes.
It took 141 days to realize the one-time and accurate installation of 80,000 tons of immersed pipes on the seabed of the West Artificial Island...... Facing the wind and stepping on the huge waves, tens of thousands of builders have struggled in the Pearl River Estuary for seven consecutive years.
Frequent typhoons, high salt and humidity environments, and complex seabed conditions...... This is one of the most difficult cross-sea cluster projects in the world.
The Zhongshan Bridge and the Shenzhong Bridge in the Shenzhong Corridor under construction were photographed on September 22, 2021. Xinhua News Agency (Photo courtesy of the Shenzhen-Zhongshan Channel Management Center)
How strong is this sea miracle? The numbers speak for themselves
The world's largest span all-offshore steel box girder suspension bridge: the main span of the Shenzhong Bridge is 1,666 meters, and the total span is 2,826 meters with the side spans on both sides;
The world's highest navigable clear space bridge in the sea: the main tower of the Shenzhong Bridge is 270 meters high, the bridge deck is as high as 91 meters from the sea level, and the navigable clearance of ships is 76.5 meters, which can meet the navigation needs of 300,000 tons of bulk carriers and 30,000 TEU container ships in the future;
The soon-to-be-opened Shenzhong Corridor taken on June 27 (drone photo). Photo by Xinhua News Agency reporter Mao Siqian
The world's longest two-way eight-lane submarine immersed tunnel: the Shenzhong Passage Submarine Tunnel, a two-way eight-lane tunnel with a length of about 6.8 kilometers, of which the immersed section of the submarine tunnel is 5,035 meters long, which is connected by 32 pipe sections weighing 8 tons and a final joint;
The world's first underwater highway hub interchange - airport interchange: the land area of the east artificial island of the Shenzhen-Zhongshan Corridor is 343,800 square meters, equivalent to 48 international standard football fields, and the tunnel project on the island includes a 480-meter-long weir section tunnel, an 855-meter-long main line tunnel on the island, and 4 ramp tunnels to realize traffic transfer......
Have you ever seen a "glass wall" that can resist a strong typhoon of 17 levels?
Cao Dan, a reporter from CCTV, said that in the center of the bridge deck of the Shenzhong Bridge, there is a hidden glass wall. It looks like ordinary tempered glass, but they are the "secret weapon" of the Shenzhong Bridge to resist the wind.
Chen Huanyong, deputy director of the Chief Engineer Office of the Shenzhong Channel Management Center, introduced that this is our central stabilizer plate, and the main purpose is to improve the stability of the Shenzhong Bridge against wind. Hinders the development of vortices under the action of strong winds, thereby increasing the stability of flutter.
The bridge deck of Shenzhong Bridge is as high as 91 meters, which is currently the world's largest span and the highest bridge deck of the all-offshore suspension bridge, and is located in the Lingdingyang sea area where strong typhoons frequently occur, so it has particularly high requirements for wind stability. In order to solve this problem, the construction personnel jointly conducted parallel research with four universities in China, and after more than 300 sets of aerodynamic shape design and wind tunnel tests, the main beam of the bridge was optimized to adopt the comprehensive pneumatic measures of "horizontal deflector plate + upper central stabilizer plate + high air permeability railing" to minimize the risk of flutter and vortex vibration of the bridge.
Chen Huanyong, deputy director of the chief engineering office of the Shenzhen-Zhongshan Channel Management Center, said that the wind speed of the flutter criticality has increased to the world's highest 88 meters per second, and the highest to a strong typhoon above 17 levels, the bridge should be no problem and safe.
How to take the route of the Shenzhong Passage? Please keep this guide
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.
This is the traffic flow on the west artificial island section of the Shenzhen-Zhongshan Corridor on the first day of opening. Photo by Xinhua News Agency reporter Liu Dawei
This is the traffic flow in the subsea immersed tunnel of the Shenzhong Passage on the first day of opening. Photo by Xinhua News Agency reporter Liu Dawei
After the opening of the Shenzhen-Zhongshan Corridor, drive west from the Shenzhen side, the first exit on the west bank is the Cuiheng East Exit, which can go to Zhongshan Cuiheng New District, and go straight from the main line to Zhongshan, Jiangmen and Yangjiang, Maoming, Zhanjiang and other cities in western Guangdong, and after transferring to the Zhongshan East Outer Ring and Guangzhou-Macao Expressway through the Zhongkai Expressway, you can go to Guangzhou, Foshan, Zhuhai, Macao and other cities.
Drive eastward from the Zhongshan side, pass through the Shenzhong Bridge and the undersea tunnel, set up the first high-connection 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.
At present, Nansha is speeding up the construction of the Wanqingsha branch line of the South-Central Expressway, which is planned to be completed and opened to traffic within the year. After the opening of the South-Central Expressway, eastbound and westbound vehicles will be transferred to the Wanqingsha branch line through the Shenzhen-Zhongshan Corridor, which can reach Zhongshan city and Jiangmen and other places through the South-Central Expressway, and can reach Nansha, Panyu and urban areas in Guangzhou after transferring to the Nansha Port Express through the South-Central Expressway. The supporting Wanqingsha service area is planned and constructed as a gateway-type service area integrating transportation, tourism, leisure and business functions. After the opening of traffic, the driving time from Nansha to Shenzhen will be shortened to about 20 minutes.
The Shenzhen-Zhongshan Corridor connects the two major urban agglomerations of "Shenzhen-Dongguan-Huizhou" and "Zhuzhongjiang". Photo by Xinhua News Agency reporter Liu Dawei
What super-effects will the mega-project bring?
"I used to be from Zhongshan, but now I am from Shenzhen, and I will soon be from 'Shenzhen + Zhongshan'." This is the introduction of many Zhongshan people working in Shenzhen in the interview. The half-hour commute time makes the road to Shenzhen, the city of the future, faster, and people are more looking forward to the new life of "working in Shenzhen and living in Zhongshan", and the round-trip between the two cities will be more frequent.
In order to turn the "flow" brought by the Shenzhen-Zhongshan Corridor into "retention", Shenzhen, which is a "city club with a consumption of one trillion yuan", is stepping up its efforts, and many commercial core areas are actively carrying out consumption promotion activities to prepare for the consumption tide that will come after the opening of the Shenzhen-Zhongshan Corridor; In Zhongshan City, a number of construction projects, including commercial residences and workshops, have been capped, waiting for more people or enterprises to "move in", becoming an important position to undertake the industrial spillover of Shenzhen and other eastern coast cities and attract investment.
With convenient transportation and interconnection, the "half-hour living circle" of Shenzhen-Zhongshan and the "one-hour living circle" of the Greater Bay Area have gradually become a reality of life from a development vision, and the "sense of the same city" of the people on the east and west sides of the Pearl River Estuary has become stronger.
Transportation is connected to life and production.
Since ancient times, transportation location has been an important factor affecting the industrial pattern and economic development. The Pearl River Estuary, as a natural barrier, profoundly affects the industrial structure and economic development path of the urban agglomerations on the east and west banks.
The eastern coast urban agglomerations represented by Shenzhen, Dongguan and Huizhou have advanced manufacturing and strong scientific and technological innovation capabilities, but the cost of space and land use is high. The urban agglomerations on the west coast, represented by Zhuhai, Zhongshan and Jiangmen, are just the opposite. The industrial development of the two sides of the strait is complementary, but there is no "heavenly road" that can cross the Pearl River estuary.
Now, the Shenzhen-Zhongshan Corridor has been officially opened to traffic. It is not only the traffic that is speeding up on the channel, but also the development of enterprises between the two sides of the strait; It is not only the flow of vehicles, but also various elements such as technology and finance between the two urban agglomerations.
(Source: China Science and Technology Network integrated from CCTV news client, Xinhua News Agency, etc.)