China News Service, Beijing, September 14th:

"Feihong" connects the sky, weaves the warp and weft, and "the perfect combination" reflects in China

　　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 sea moat that was once difficult to cross, now, in addition to the boundless blue waves, there are also solid and wide sea-crossing bridges.

Connecting the moat, weaving the warp and weft, and erecting a network of sky roads at sea

　　Across rivers, lakes and seas, through canyons, and even mountains.

At present, one after another world-class bridge projects are developing in the north and south of my country's great river.

　　On the banks of the Pearl River and the South China Sea.

In 2018, the Hong Kong-Zhuhai-Macao Bridge, the world's longest sea-crossing bridge with a total length of about 55 kilometers, was officially opened to traffic. The flow of people, vehicles and logistics in Hong Kong, Macau and Zhuhai was more closely linked, and the flow of factors in the Greater Bay Area was improved. Great convenience and broader development space.

　　The domain of the storm, the battlefield of the strong.

In 2020, my country's first cross-sea highway-railway bridge and the world's longest cross-strait highway-railway bridge - Pingtan Strait Road-Railway Bridge "fixed" the stormy sea area with a solid body, and its size has set a record among sea-crossing bridges. most.

　　A new journey, forging ahead.

In August 2022, my country's first cross-sea high-speed railway, the newly-built Fuzhou-Xiamen Railway, will be fully tracked, and China's high-speed railway will achieve "cross-sea without slowing down".

This is the first of its kind in my country's high-speed rail maritime construction, which has added an important puzzle to solving the "bottleneck" constraints of railways in the southeast coastal areas and building a new pattern of modern transportation.

　　From highway bridges, highway-railway bridges to high-speed railway bridges, from river-crossing bridges to sea-crossing bridges, a variety of new bridge structures and technologies are widely used, creating a new speed in the construction of sea-crossing bridges in my country.

Hong Kong-Zhuhai-Macao Bridge.

Photo by China News Agency reporter Zhang Wei

People enjoy their journeys, and things flow smoothly, Feihong is loaded with happiness

　　15 years ago, Li Xinguo, who just graduated from Xiamen University, took the train to Fuzhou to start a business. "The 13-hour bumpy road is too much time-consuming." With the opening of the Fuzhou-Xiamen Railway, he started a "two-city life" between Fuzhou and Xiamen. ”, “It only takes two hours to go back and forth on the same day, which is really convenient.”

　　The faster Fuxia-Xiamen high-speed rail made Li Xinguo's expectations even more.

After the opening of the Fuzhou-Xiamen high-speed railway, the journey from Fuzhou to Xiamen will be shortened to less than one hour, providing a strong impetus to build the "one-hour economic circle" along the coast of Fujian.

　　"It used to be only one trip a day to Macau, but now it can run four times a day. Air cargo going through Hong Kong Airport used to arrive at the Hong Kong warehouse two days earlier, but now it only takes half a day to cross the bridge." For Zheng Tailong, who works in e-commerce, the most intuitive feeling brought by the Hong Kong-Zhuhai-Macao Bridge is that it takes less time to transport goods and higher returns.

　　For local residents, the Guangdong-Hong Kong-Macao Greater Bay Area is an extension and extension of their home.

Combining both software and hardware connectivity is an inevitable path for high-quality construction of the Greater Bay Area and world-class urban agglomeration.

The "Greater Bay Area on Orbit" is being formed at an accelerated pace, basically forming a "1-hour living circle".

　　In Fujian, Yang Chaoping, who was born in Wujing Village, Suao Town, Pingtan, still remembers that he followed his parents from Pingtan to Fuzhou to visit relatives when he was a child. It takes 12 hours.

Yang Chaoping, who was seasick since he was a child, was "especially afraid of going to Fuzhou".

　　The trial operation of the highway section of the Pingtan Strait Highway-Railway Bridge has added a six-lane expressway channel with a design speed of 100 kilometers per hour and a railway channel with a speed of 200 kilometers to Pingtan.

All roads are galloping, China Unicom communicates, and nostalgia is also felt.

Pingtan Strait Railway Bridge.

Photo by Wang Dongming

Open roads in mountains and build bridges in water, challenging "bridge construction forbidden areas"

　　The world's longest sea-crossing bridge, the world's longest road-rail dual-use sea-crossing bridge, the world's fastest cross-sea railway, the world's longest-span cross-strait road-rail dual-use cable-stayed bridge, the world's longest-span sea-crossing bridge Steel box girder suspension bridge... The construction of a sea-crossing 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 point of view, the Hong Kong-Zhuhai-Macao Bridge is a 'sweet pastry', but in terms of the difficulty of engineering construction, it is a 'hard bone'." General Manager of CCCC, Hong Kong-Zhuhai-Macao Bridge Island Liu Xiaodong, chief designer of the tunnel project, said.

Under the design concept of semi-rigid structure, the immersed tunnel of the Hong Kong-Zhuhai-Macao Bridge was successfully constructed.

　　When it comes to the deep-middle channel under construction, the Lingdingyang Bridge, the world's largest span mid-sea steel box girder suspension bridge, will join forces with the world's first ultra-long two-way eight-lane submarine tunnel through an artificial island.

　　"The immersed pipe section of the subsea tunnel of the deep middle channel is about 5 kilometers long and consists of 32 pipe sections and one final joint. A medium-sized aircraft carrier," introduced Xu Guoping, deputy general manager of CCCC and chief designer of the Shenzhen-Zhongshan Channel.

As a result, the deep channel immersed tunnel is the first large-scale steel shell concrete structure in the world.

　　The difficulty of crossing the sea, in addition to the breakthrough in length and span, also comes from the "challenge book" from the ocean itself.

　　In the area of ​​Pingtan County, Fujian Province, strong winds above level 6 exceed 300 days a year, with high winds and waves.

"The harsh climatic conditions and complex hydrogeological conditions made this area once known as a 'bridge construction forbidden area'," said Wang Donghui, chief engineer of the Pingtan Strait Highway-Railway Bridge Project of China Railway Bridge Bureau.

　　In order to overcome the harsh natural environment, China Railway Bridge Bureau adopted the whole-hole welding of steel truss girder during the construction process of the bridge, and the whole assembly was manufactured in the factory. Then it was transported to the bridge location by sea for about 1,000 kilometers, and the whole hole was erected by floating cranes on site. It is a domestic initiative, filling the technical gap of the whole-hole hoisting and erection of large-section steel truss girder in my country's cable-stayed bridges, and realizing a leap in the construction of steel truss bridges from single-piece erection to whole-section erection to whole-hole erection.

　　Among them, the "Bridge Seagull" self-propelled double-arm luffing crane ship built by China Railway Bridge Bureau for three years has a lifting capacity of 3,600 tons - equivalent to the weight of 2,400 cars, and the lifting height of the main hook reaches 3,600 tons. 110 meters - equivalent to a 39-story building, it is the double-jib crane vessel with the largest lifting capacity and the highest lifting height in China.

my country's first cross-sea high-speed railway - Fuzhou-Xiamen high-speed railway.

Photo courtesy

　　To see the silver mountain shooting the sky waves, open the window and put it into the big river.

　　Not long ago, the last section of the Anhaiwan Bridge was laid, marking my country's first cross-sea high-speed railway, the Fuxia-Xiamen high-speed railway, which is one step closer to its operation.

　　The Anwan Bay Bridge, built by the China Railway Construction Bridge Engineering Bureau Group, is one of the control projects of the new Fuzhou-Xiamen Railway.

In more than four years of construction, the bridge builders have successively overcome a series of construction problems such as steel-concrete composite hanging box cofferdams in tidal areas, large-diameter deep-water pile foundations, and positioning of steel anchor beams for the main tower.

Sediment separator, concrete overfill reminder, ultrasonic hole detector, intelligent temperature control system... There are more than 10 kinds of the latest bridge construction technologies and processes adopted in the construction of Anhai Bridge.

　　The blueprint is slowly unfolding, and construction is in full swing.

Bridges eventually become solid roads under our feet. On these sea roads, we are not only crossing the sea, but also heading for a common future.

(Finish)