Video: [Coordinate China] China span - crossing the sea Source: China News Network
China News Network Beijing, September 14th Title: "Flying Rainbow" connects the natural troughs and weaving warp and weaving, "the perfect combination" Yingluo Shenzhou
Reporter Zuo Yukun
Jiaozhou Bay , about 28 kilometers wide; Meizhou Bay , about 30 kilometers wide; Quanzhou Bay , about 42 kilometers wide; Lingdingyang, about 65 kilometers wide; Hangzhou Bay , about 100 kilometers wide...
The natural trough on the sea that was once difficult to cross, but now, in addition to the endless blue waves, there are also solid and wide cross-sea bridges .
connects the natural barriers and weaves the warp and wefts, and builds the Tianlu Network on the sea
crosses rivers, crosses lakes and seas, crosses canyons, and connects mountains. At present, world-class bridge projects are growing from all over my country.
Border of the Pearl River , Border of the South China Sea . In 2018, the world's longest cross-sea bridge, the Hong Kong-Zhuhai-Macao Bridge, , with a total length of about 55 kilometers, was officially opened to traffic. The flow of people, vehicles and logistics in Hong Kong, Macao and Zhuhai were more closely linked. The flow of factors in the Greater Bay Area was greatly facilitated and the development space was broader.
The domain of the storm, the battlefield of the strong. In 2020, my country's first cross-sea road-rail dual-purpose bridge and the world's longest cross-strait road-rail dual-purpose bridge - Pingtan Strait Road-rail Bridge "stabilizes" the storm waters with its solid body, and its large size set the largest cross-sea bridge.
A new journey, forge ahead. In August 2022, my country's first cross-sea high-speed railway - the newly built Fuxia Railway, , was completed, and China's high-speed railway achieved "no slowing across the sea". my country's high-speed railway maritime construction has been created, and an important puzzle was added to solve the "bottleneck" constraints of railways in the southeast coastal areas and build a new modern transportation pattern.
From highway bridges, road-rail dual-purpose bridges to high-speed railway bridges, from cross-river bridges to cross-sea bridges, a variety of new bridge structures and technologies have been widely used, creating a new speed in the construction of cross-sea bridges in my country.
Hong Kong-Zhuhai-Macao Bridge. Photo by Zhang Wei, China News Service reporter,
people enjoy their journey and the flow of things. The flying rainbow loads happiness to
15 years ago, Li Xinguo, who just graduated from Xiamen University, took a train to Fuzhou to start a business. "The 13-hour bumpy journey was too delayed." With the opening of the Fuxia Railway, he started "two-city life" between Fuzhou and Xiamen . "It only takes two hours to travel back and forth on the same day, which is really convenient."
The faster Fuxia High-speed Railway made Li Xinguo expect more. After the Fuzhou-Xiamen High-speed Railway was opened, the itinerary from Fuzhou to Xiamen was reduced to within 1 hour, providing strong impetus for the creation of the " one-hour economic circle " along the coast of Fujian.
"I used to be able to go to Macau once a day, but now I can go four times a day; the air cargo that takes Hong Kong Airport had to arrive at the Hong Kong warehouse two days in advance, but now it only needs to pass the bridge half a day in advance." For Zheng Tailong, who works in cross-border e-commerce in Zhuhai, the most intuitive feeling brought by the Hong Kong-Zhuhai-Macao Bridge is: it takes less time to transport goods and higher returns.
Guangdong-Hong Kong-Macao Greater Bay Area is an expansion and extension of home for local residents. The integration of soft and hard connections is an inevitable path to high-quality construction of the Greater Bay Area and building a world-class urban agglomeration. The "Greater Bay Area on the track" is accelerating its formation, basically forming a "1-hour living circle".
In Fujian, Yang Chaoping, born in Wujing Village, Suao Town, Pingtan, still remembers that when he was a child, he followed his parents from Pingtan to Fuzhou to visit relatives. He took a tractor to the dock at home, took a ferry to , Panasonic Town, and then transferred to Fuzhou city. The whole journey took at least 12 hours. Yang Chaoping, who has been seasick since childhood, is "very afraid of going to Fuzhou."
Pingtan Strait Highway and Railway Bridge section open to traffic and trial operation, adding a six-lane expressway channel with a designed speed of 100 kilometers per hour and a railway channel with a speed of 200 kilometers per hour to Pingtan. All the great roads are running endlessly, and communication is also aroused homesickness.
Pingtan Strait Road and Rail Bridge.Photo by Wang Dongming
Pushing roads across mountains and building bridges across water, challenging the "bridge-building restricted area"
The world's longest cross-sea bridge, the world's longest dual-use cross-sea bridge, the world's highest driving speed cross-sea railway , the world's largest span of cross-strait dual-use cable-stayed bridge, the world's largest span of the sea-sea steel box girder suspension bridge... The construction of a cross-sea bridge is so difficult and the construction process is so long. Why do tens of thousands of builders have to cross the sea again and again?
"From a certain perspective, the Hong Kong-Zhuhai-Macao Bridge is a 'hot commodity', but in terms of the difficulty of engineering construction, it is a 'hard bone'." said Liu Xiaodong, general manager of of China Communications Communications Public Regulations Institute and chief designer of the Hong Kong-Zhuhai-Macao Bridge Island Tunnel Project. Under the design concept of semi-rigid structure, the immersed pipe tunnel of the Hong Kong-Zhuhai-Macao Bridge was successfully built.
to the deep-middle channel under construction, the world's largest span sea steel box girder suspension bridge - Lingdingyang Bridge will join forces with the world's first specialty two-way eight-lane undersea tunnel through artificial islands.
"The immersed pipe section of the Shenzhen-China Channel undersea tunnel is about 5 kilometers long and consists of 32 pipe sections and 1 final joint. Each pipe section realizes the "undersea hand" like a building block. But the size of a pipe section is comparable to that of a medium-sized aircraft carrier ." Xu Guoping, deputy general manager of the China Communications Communications Commission and chief designer of the Shenzhen-China Channel, introduced. Therefore, the deep-middle channel immersed pipe tunnel has adopted a steel shell concrete structure for the first time in the world.
The difficulty of spanning the sea is not only the breakthrough in length and span, but also the "challenge book" from the ocean itself.
In Pingtan County, Fujian Province, strong winds above Level 6 will exceed 300 days every year, and the winds are high and the waves are severe. "The harsh climatic conditions and complex hydrogeological conditions made this place once called the 'bridge construction forbidden area'." said Wang Donghui, chief engineer of the Pingtan Strait Road and Railway Bridge project of China Railway Bridge Bureau.
In order to overcome the harsh natural environment, China Railway Bridge Bureau adopted the whole welded steel truss holes during the bridge construction process, and the overall manufacturing and assembly was carried out in the factory. Then, after about 1,000 kilometers of sea transport to the bridge location, the on-site seafloating crane complete hole erection is the first in China, filling the technical gap in the lifting and erection of steel truss holes in large sections of cable-stayed bridges in my country, realizing a leap from single-piece erection to full-section erection to full-hole erection of steel truss bridge framing facilities.
Among them, the "Bridge Seagull" self-averse double-arm variable-amplitude lifting ship , which lasted three years, has a lifting capacity of 3,600 tons - equivalent to the weight of 2,400 cars, and the main hook lifting height is 110 meters - equivalent to 39 floors. It is the double-arm lifting ship with the largest lifting weight and the highest lifting height in China.
China's first cross-sea high-speed railway - Fuzhou-Xiamen High-speed Railway. Photo provided by
You should take a look at the silver mountains and take a picture of the sky, and open the window and put it into the river.
Not long ago, the last section of the track of the Anhai Bay Super Bridge was laid, marking that my country's first cross-sea high-speed railway, Fuzhou-Xiamen High-speed Railway, was one step closer to opening the operation.
Anhaiwan Super Bridge, which is built by China Railway Construction Bridge Engineering Bureau Group , is one of the control projects of the new Fuxia Railway. In more than four years of construction, the bridge builders have successively overcome a series of construction problems such as steel-concrete combination hanging box cofferdam in the tidal area, large-diameter deep water pile foundation, and main tower steel anchor beam positioning. Sand separator, concrete overload reminder, ultrasonic hole detector, intelligent temperature control system... There are more than 10 latest bridge construction technologies and processes adopted in the construction of Anhaiwan Super Bridge.
blueprint is slowly unfolding, and the construction is in full swing. Bridges eventually become solid roads under our feet. When we embark on these sea-to-sky roads, we are not only crossing the sea, but also heading to a common future. (End)
