A Record of the Construction of a Super Engineering Deep and Medium Passage for a Bridge Flying Frame Deep and Medium Cross Sea Missile Finger
2024-07-02
Seven years of sharpening a sword, thousands of builders strive for the wonders of the world. On June 30th, another highly anticipated super project was announced to be completed and opened to traffic! On the vast sea surface, during the day, in the golden sunshine, the deep middle passage that infiltrates from the water pierces through clouds and waves, like a diving dragon going out to sea. On this magnificent "transportation backbone", the development of the Guangdong Hong Kong Macao Greater Bay Area has entered the fast lane, which is the pride and progress of Guangdong's high-quality development; At night, under the bright moonlight, the 24 kilometer deep channel of Changhong lies on the waves, like a resilient pole. In the "High Quality Development Project of Hundred Counties, Thousand Towns, and Ten Thousand Villages", the Pearl River Delta has lifted the eastern part of Guangdong and the western part of Guangdong, with infrastructure aimed at solving the pain points and difficulties that constrain urban-rural development. This is the equal and warm development of the Guangdong region. A flying bridge is deep in the middle, and "little ocean" is no longer "little ocean". From a satellite perspective, the integration of Guangdong Hong Kong Macao Greater Bay Area is accelerating, and both sides of the the Pearl River are poised to take off! Seven years of sharpening a sword to build a dream, "the most in the world", and "sighing in the ocean of small people". Over 700 years ago, the patriotic poet Wen Tianxiang of the Southern Song Dynasty once sighed here. Nowadays, more than ten thousand builders from the north and south of the Yangtze River have honed their swords in seven years, building the Tianlu, the Great Wall, and the Shuangdao in the Lingdingyang area, one after another, creating a "miracle" in infrastructure construction, turning "sighing for the small" into "crossing a huge change". The Shenzhen China Channel is the most critical "horizontal" of the main framework of the "A" shaped traffic around the Pearl River estuary. It integrates "bridges, islands, tunnels and underwater hubs" and is one of the most difficult cross sea cluster projects in the world. The underwater immersed tube tunnel of the Shenzhong Channel, captured on June 27, 2024, is the world's longest and widest underwater steel shell concrete immersed tube tunnel, with a length of 5035 meters and eight lanes in both directions. Xinhua News Agency reporter Mao Siqian captured the world's first bidirectional eight lane underwater immersed tube tunnel, the world's largest span offshore mid sea suspension bridge, and other fields. The Shenzhong Passage has set more than ten world records. The Shenzhen Zhongshan Tunnel fully leverages the strategic leading position and fundamental supporting role of technology, and has developed 10 world leading technologies, including the "Steel Shell Concrete Immersed Tube Tunnel Design Method". Since its construction, the Shenzhong Tunnel has obtained over 200 invention patents, dozens of industry association awards, and has repeatedly received international acclaim. In April 2024, the Shenzhong Bridge won the George Richardson Award at the International Bridge Conference, and the Shenzhong Tunnel was awarded the "50 Iconic Projects in the Global Tunnel and Underground Engineering Field". "Guangdong will enhance the accessibility and service efficiency of the road network with new quality productivity, promote the further improvement and smoothness of the high-speed road network along the Shenzhen Zhongshan Corridor and surrounding areas, and provide efficient and safe 'hard connectivity' support for the development of the Greater Bay Area." Lin Feiming, Director of the Department of Transport of Guangdong Province, said that the Shenzhen China Channel has the most cutting-edge technology in China's infrastructure construction, which is a vivid portrayal of accelerating the construction of a transportation power. Its completion and opening to traffic will completely change the overall road grid of the the Pearl River Estuary, which is of great significance to the economic and social development of the Guangdong Hong Kong Macao Greater Bay Area. As one of the key control projects of the Shenzhen China Channel, the Shenzhen China Bridge has adopted the world's largest offshore suspension bridge with a main span of 1666 meters to meet the navigation needs. The bridge deck is 91 meters high, and it is also located in the open waters of the the Pearl River Estuary, where strong typhoons frequently occur. The wind resistance problem is prominent. "In the face of technological challenges, we have organized multiple universities and research institutions to conduct parallel research using a four in one approach of production, education, research, and application for over three years. We have developed a new type of combined aerodynamic control technology, which significantly improves the wind resistance performance of large-span integral steel box girder suspension bridges for the first time in the world." Song Shenyou, Director and Chief Engineer of Guangdong Transportation Group's Shenzhong Channel Management Center, said that the project has raised the critical flutter wind speed of the large-span steel box girder suspension bridge from the globally recognized 70 meters/second to 88 meters/second, breaking foreign authoritative judgments in one fell swoop. Cable is one of the key components under stress in suspension bridges. How to ensure durability in harsh environments such as high temperature, humidity, and salt? In order to make the lifeline of the suspension bridge stronger and more durable, the builders of the deep middle channel project focused on the core key technology that restricts the durability of the main cable of the suspension bridge. The team has developed for the first time internationally a 6mm to 2060 megapascals zinc aluminum multi-element alloy coated steel wire strand, which has twice the corrosion resistance of the previous hot-dip galvanized aluminum alloy steel wire. The underwater tunnel of the Shenzhong Passage is about 6.8 kilometers long, and the total steel consumption is three times that of the National Stadium's Bird's Nest. The steel shell concrete immersed tube tunnel is about 5 kilometers long, divided into 32 pipe sections and 1 final joint. The standard pipe section is 165 meters long, and standing up is a 55 story building. The final docking of the joint is like a needle piercing through the seabed, with an error controlled at the millimeter level. In order to achieve this high difficulty goal, the builders have gone through 2 years of technical demonstration and 1 year of joint design, and have pioneered a new technology for prefabricated underwater final joints of sunken pipes worldwide. "Through a control system based on Beidou measurement, we have achieved a 'millimeter level' flat installation accuracy of 15 pipe joints." Song Shenyou said that the steel shell concrete immersed tube tunnel has achieved multiple original innovations in design theory, manufacturing technology, new materials, large-scale equipment, and final joints, effectively promoting the technological progress of China's immersed tube tunnels and enriching the "Chinese plan" and "Chinese standards" of the world's cross sea immersed tube tunnels. Does "Golden Inner Bay" increase gold content? The report of the 13th Party Congress of Guangdong Province on the acceleration of integration of the Greater Bay Area pointed out that we should improve the level of integration, take the integrated development of the east and west sides of the the Pearl River Estuary as a breakthrough, deepen the integration of infrastructure, industrial development, social governance, etc., promote the integrated high-quality development pilot of the the Pearl River Estuary in the Greater Bay Area of Guangdong, Hong Kong and Macao, and strive to create a 100 km "golden inner bay" around the Pearl River Estuary, so as to drive the coordinated development of the three metropolitan areas of Guangzhou, Shenzhen, and the west bank of the the Pearl River Estuary and gather momentum for take-off. On June 19, 2024, a night view of the soon to be opened Shenzhong Passage was taken at the top of Dajian Peak in Cuiheng New District, Zhongshan. As a major transportation artery connecting the urban agglomerations on both sides of the east and west banks of Jiangkou, the importance of the deep middle channel is self-evident, as photographed by Xinhua News Agency reporter Liu Dawei. Deng Xiaohua, chairman of Guangdong Communications Group, said that as a new "traffic backbone" and a key "A-shaped" transport network framework in the Guangdong Hong Kong Macao Greater Bay Area, the Shenzhen China Channel, at the stage of self conception and design, is shouldering the important mission of promoting better connection and integration between the east and west sides of the the Pearl River Estuary. With the opening of this channel in the near future, the "gold content" of the "golden inner bay" at the mouth of the the Pearl River River will be greatly improved, which will have a profound impact on the regional development pattern of the Guangdong Hong Kong Macao Greater Bay Area. After the completion and opening of the Shenzhen Zhongshan Passage, the travel time between Shenzhen and Zhongshan will be shortened from 2 hours to less than 30 minutes, and the two places will join hands to enter the "half hour living and transportation circle". "I remember when I was a child, my parents took me to Zhongshan Hot Springs. It took me an hour to travel from Hong Kong to Macau, then transferred to Zhuhai Special Economic Zone, and finally passed through customs before transferring to Zhongshan. It took me almost a day to walk from Hong Kong to Zhongshan. Now, I take my child to Zhongshan in less than an hour." Huo Qigang, a deputy to the National People's Congress and a member of the Hong Kong Legislative Council, said, "The Guangdong Hong Kong Macao Greater Bay Area has changed the living habits of a generation." Shenzhen and Zhongshan are facing each other across the Pearl River estuary. More and more enterprises are performing the story of "A Tale of Two Cities" in Shenzhen and Zhongshan. The industrial chain and innovation chain of the two places are deeply integrated. Established in 2006, Shenzhen Xinyichang Technology Co., Ltd. is an enterprise mainly engaged in the research and development, production, and sales of intelligent manufacturing equipment in industries such as LED, semiconductor, and capacitor. Due to business expansion, the company has to travel back and forth between Shenzhen and Zhongshan multiple times a week, from leaders to employees. "The soon to be opened Shenzhen Zhongshan Passage is the Golden Avenue for us. Previously, it took over two hours from the R&D center in Nanshan District, Shenzhen to the factory in Zhongshan. After the opening of the Shenzhen Zhongshan Passage, the travel time will be shortened to less than 30 minutes." According to Yuan Moli, Director of the President's Office of the company, since 2017, the company has entered a stage of rapid development, with annual sales rising from 500 to 600 million yuan to over 1 billion yuan. In order to expand industrial space, the company has built a nearly 100 acre factory in Zhongshan City. In the future, a layout will be formed with headquarters located in the central area of Bao'an, Shenzhen, research and development center located in Nanshan Science and Technology Park, and production base located in the Cuiheng New Area of Zhongshan. Meng Fanli, Secretary of the Shenzhen Municipal Party Committee, said that by leveraging the key role of major projects such as the Shenzhen China Corridor, Shenzhen will launch more new measures to facilitate the travel of citizens between the two cities, further facilitate the flow of people, logistics, information, funds and other elements, and promote industrial innovation cooperation in a coordinated manner. Combining the resource endowment and industrial foundation of the two cities, Shenzhen and China will jointly build innovation chains, industrial chains, and supply chains on a larger scale, and accelerate the cultivation and development of new quality productive forces; Jointly building world-class advanced manufacturing clusters, vigorously developing modern service industries, and accelerating the construction of a modern industrial system oriented towards the future; Strengthen exchanges and cooperation in business environment, cultural tourism, livelihood undertakings, social governance and other fields, and create a production and living environment that is "cross city without feeling"... Shenzhen is promoting the integration and interaction between the east and west sides of the the Pearl River Estuary, and making new and greater contributions to the construction of the Guangdong Hong Kong Macao Greater Bay Area and the overall development of the province. In the Zhongshan Shenzhen China Economic Cooperation Zone, modern factories have sprung up one after another, and the construction of BYD Zhongshan Factory Phase II has been accelerated, and the Chengyi Flat Panel Display Device Project has been successfully topped out. With its location and spatial advantages, as well as a good industrial foundation, 71 high-quality enterprises have been attracted so far. Shenzhen is holding hands with Zhongshan and working together to cultivate new productive forces, jointly cultivating several billion dollar industrial clusters such as electronic information, health medicine, and new energy. A 20 minute drive not only shortens the geographical distance between Shenzhen and Zhongshan. "The Shenzhen China Channel has realized the integrated and interactive development of the east and west sides of the the Pearl River Estuary, and let Shenzhen and Zhongshan, facing each other across the river, shake hands closely together, opening a new milestone of Shenzhen China integration and urban integration development." Guo Wenhai, Secretary of the CPC the Pearl River Municipal Committee, said that Zhongshan will resolutely implement the experimental zone for integrated development, reform and innovation of the east and west sides of the Pearl River Estuary, and more actively promote the "six integrations" of Shenzhen and China planning, business environment, industry, transportation, innovation, public services and social governance. "The Shenzhen Zhongshan Corridor is also a golden avenue for Zhongshan to enter the world and the world to enter Zhongshan. Zhongshan will seize this historic opportunity of the Shenzhen Zhongshan Corridor, transform its geographical advantages into a high-quality development advantage, and make positive contributions to the construction of a world-class bay area." Guo Wenhai said. At present, the total length of expressways in the Guangdong Hong Kong Macao Greater Bay Area has exceeded 4500 kilometers, and a rapid transportation network has been basically formed. When the Shenzhen China Channel is completed and opened to traffic, it will be linked with Humen Bridge, Nansha Bridge, Guangzhou Shenzhen Expressway, Guangzhou Zhuhai East Line, Guangzhou Zhuhai West Line and other channels to form a chain of cities in the Guangdong Hong Kong Macao Greater Bay Area, build a new pattern of one hour economic circle in the Greater Bay Area, and further promote the interconnection of people, goods, capital and information flows on both sides of the the Pearl River. Overlooking the Guangdong Hong Kong Macao Greater Bay Area, Nansha District of Guangzhou is located at its geographical center. Through the Wanqingsha branch line of the Nanzhong Expressway, Nansha will achieve direct connection to the Shenzhen Zhongshan Corridor, holding hands with Shenzhen and Zhongshan on the Lingdingyang River. It is expected that after completion and opening to traffic within this year, the travel time from Nansha to Shenzhen will be shortened to less than 20 minutes, and the travel time to Zhongshan urban area will be shortened to less than 15 minutes. "The completion and opening of the Shenzhen China Channel has further facilitated the transportation links between Nansha and the east and west sides of the the Pearl River Estuary, helped Nansha build a comprehensive transportation three-dimensional system that integrates the world, connects Hong Kong and Macao, and connects the Bay Area directly, and created a strategic fulcrum for the integrated development of the east and west sides of the the Pearl River Estuary." Liu Wei, member of the Standing Committee of the Guangzhou Municipal Party Committee and Secretary of the Nansha District Party Committee, said that the opening of the Shenzhen Zhongshan Corridor also helps Nansha better integrate into the "Yellow River"
Edit：Li Ling Responsible editor：Chen Jie
Source：Xinhuanet
Special statement: if the pictures and texts reproduced or quoted on this site infringe your legitimate rights and interests, please contact this site, and this site will correct and delete them in time. For copyright issues and website cooperation, please contact through outlook new era email：lwxsd@liaowanghn.com
Greater Bay Area
Recommended Reading Change it 
Home
