At the beginning of December, Chongqing Rail Transit Line 15 construction project site, dozens of bridge piers volleyed 100 meters in the air, standing in a line between the mountains, the top of the pier on both sides of the symmetrical blue "box", the construction site is empty from a distance, but in fact, all the people, materials and machines involved in the construction are in this "box", it is a "self-balancing intelligent hanging basket" jointly developed by the three companies of China Construction Third Bureau and China Academy of Advanced Building Technology Through the development of a full set of intelligent control systems and one-key control, the bridge deck structure continues to grow and close, which can reduce labor by 50%, and become another "artifact" in the field of infrastructure construction of "built in China".
"Bridge Building Machine" is accelerating the construction process of Chongqing Rail Transit Line 15. Photo courtesy of correspondent Zhong Sansan.
On December 28, the Yangtze River reporter learned at the high-quality development and innovation forum and the 70th anniversary summary meeting of the three companies of China Construction Third Bureau that from the "residential building machine", "bridge tower building machine" to various "construction artifacts", since its establishment 70 years ago, the company has always been committed to scientific and technological innovation, and has formed a key equipment and technology in many fields such as airport station building, bridge tunnel road, petrochemical industry, etc., of which more than 100 have reached the international leading and international advanced level.
Science and technology self-improvement continue to expand the height span of buildings.
Since its establishment, the enterprise has been flowing with the blood of innovation, and its development is also the road of scientific and technological self-improvement.
Chongqing Shancheng Widescreen Cinema. Photo courtesy of correspondent Zhong Sansan.
In 1953, under the background of the construction of the national "First Five-Year Plan", the company's predecessor, the Fourth Company of the Southwest Construction Management Bureau of the Ministry of Construction and Engineering, was established in Chongqing, and then successively built a series of important projects in Chongqing, such as eight arsenals, the first thermal power plant in southwest China - 507 power plant, and the "architectural structure monument" of the world cinema - Shancheng wide-screen cinema, and accumulated profound construction technology and experience in the military, industrial, civil and other construction fields.
In particular, the Yamashiro widescreen cinema was known as an "architectural structure monument" at that time, and the "eggshell-shaped roof" with five arches in front and three arches in the back was the world's leading, and compared with similar buildings in China, the cost was the lowest and the shortest period.
In 1971, with the opening of the "three-line construction", the company, as the main force of construction, was transferred from Chongqing to Guizhou Shuicheng (now Liupanshui) to build an important base for "large third-line" power and building materials. Because the project is located in the deep mountains, the necessary river sand for the construction of the project needs to be transported from the Guizhou-Guizhou border hundreds of kilometers away, which is time-consuming and laborious. The builders turned their attention to the mountain sand at their fingertips, through hundreds of tests, overcoming many technical problems, successfully realized the replacement of river sand with mountain sand, which was widely used in the "three-line construction", and in 1978 was awarded the first "National Science Conference Award" of the Third Bureau of China Construction Bureau.
With the development of the times, reform and opening up have given rise to the demand for a large number of engineering construction, and the structure of buildings is more complex and more diverse, and new construction technology support is urgently needed. In the 80s of the 20th century, in the construction of Xiamen Fushan International Exhibition City, the three companies completed the construction period of 450 days according to the national quota in only 157 days, creating a rare "Fushan speed" in the construction history of Xiamen Special Economic Zone.
In recent years, the three companies have formed more than 1,000 patents and construction methods in the fields of airport station buildings, bridges and tunnels, petrochemical industry, and super high-rise construction, providing solutions for continuously expanding the height, span and depth of buildings. In East China, the world's largest span of spoke-type double-layer cable-membrane structure professional football stadium - Hangzhou International Sports Center, in the southwest construction of 458 meters of Chongqing's tallest building - Chongqing Luhai International Center, in South China construction of the world's largest single airport - Guangzhou Baiyun Airport T3 terminal, the world's rare island airport - Xiamen Xiang'an International Airport, in Central China construction of the world's largest span steel truss girder cable-stayed suspension cooperation system road and rail dual-purpose bridge - Jingzhou Libu Yangtze River Road and Railway Bridge, The first kilometer-level Yangtze River bridge with a main span of China State Construction Group, the Wujiagang Yangtze River Bridge in Yichang, has won a total of 58 Luban and National Excellence Awards.
Renderings of the Yangtze River Railway Bridge in Libu, Jingzhou. Photo courtesy of correspondent Zhong Sansan.
Intelligent construction stands at the forefront of the trend.
The wave of digitalization has swept the construction industry. 20 years ago, the construction of super high-rise buildings generally adopted construction technologies such as sliding formwork, climbing formwork, and lifting formwork, but as the building is getting higher and higher, the structure is becoming more and more complex, not only to bear a large vertical load, but also to bear a large horizontal load, and the traditional formwork has been difficult to meet the construction requirements.
In order to solve this problem, the company participated in the independent research and development and updated iteration of the super high-rise building intelligent construction equipment integration platform (referred to as the "aerial building machine"), has applied a number of domestic "first tallest buildings", to achieve hundreds of meters of cloud factory construction, the fastest three days can build a floor, and the construction workers do not need to be exposed to the sun and rain, in the platform of each layer of relay to complete the reinforcement binding, formwork support, concrete pouring and maintenance, etc., thousands of tons of heavy equipment can complete the jacking of a layer in 2 hours. Since then, the three companies have extended the "aerial building machine" technology to the construction of high-rise residences, and created the first "residential building machine" in the country, which greatly improves the efficiency of high-rise residential construction.
A new generation of "aerial building machine" helps the construction of Wuhan Taikang Financial Center. Photo courtesy of correspondent Zhong Sansan.
During the construction of the Wujiagang Yangtze River Bridge in Yichang, the company and the China Institute of Advanced Building Technology jointly created the world's first "overall adaptive intelligent jacking tower platform" (referred to as the "tower building machine"), and its working principle is also inspired by the "aerial building machine" to achieve efficient and collaborative construction of multiple operating layers, increase work efficiency by more than 30%, and walk on the ground at an altitude of 100 meters. "Aerial Building Machine", "Residential Building Machine" and "Tower Machine" also appeared in the 2022 and 2023 China International Smart Expo one after another, among which, the "Residential Building Machine" was selected as the "Typical Case of Intelligent Construction New Technology and New Product Innovation Service" issued by the Ministry of Housing and Urban-Rural Development.
At the construction site of Guangzhou Baiyun International Airport and Xiamen Xiang'an International Airport project, a series of intelligent revolutions are taking place: robots become "workers", and automatic pay-off, masonry, welding, spraying and other processes are in the line.
The construction industry is a pillar industry in China, but for a long time there are problems such as large energy and resource consumption, increasing shortage of labor, and low level of science and technology.
Green development contributes to the "dual carbon" movement.
The construction industry continues to transform and upgrade to embrace green development.
Xiangyang Yuliangzhou ** Ecological Park. Photo courtesy of correspondent Zhong Sansan.
Yuliangzhou in Xiangyang City was once a barren island, China Construction Third Bureau No. 3 Company and Huazhong Agricultural University set up a joint research and development team, by optimizing the acidic impurity soil structure, transforming the terrain and water system, improving 1.35 million square meters of soil, equivalent to the area of two Forbidden City, planting 1 million square meters of vegetation, turning it into an oasis of birds and flowers.
In Xiong'an Yuerong Park, the first large-scale comprehensive park in Xiong'an New Area, and in the construction of Wuhan East Lake Greenway, a demonstration project for improving urban public space in China, the three companies independently developed a series of green technologies to allow people to enjoy a poetic habitat in nature.
During the construction of the Wujiagang Yangtze River Bridge in Yichang, the project team adopted a one-crossing scheme to protect the water quality and rare biodiversity of the Yangtze RiverThe construction of the bridge tunnel anchor innovates the "micro-blasting" process, performs "minimally invasive surgery" on the mountain, and relies on manual and small mechanical precision operation to protect the integrity of the surrounding rock mass to the greatest extentUnder the condition of basically not disturbing the original ecological environment, a bridge will be "grown" in situ.
Yichang Wujiagang Yangtze River Bridge. Photo courtesy of correspondent Zhong Sansan.
The company is also in the field of large-scale public construction, new energy plants, photovoltaic power generation and other hundreds of projects, the full introduction of green construction concept, Wuhan Zhongjian Optics Valley Star and other projects by China Green Building "three-star green building label" and LEED gold certification, Chongqing Yaou auto parts factory new project as the country's first zero carbon emission auto parts manufacturing base, saving electricity consumption of 1158 per year50,000 degrees.
Science and technology are the primary productive forces, and innovation is the primary driving force. "China Construction" is accelerating its global journey along the "Belt and Road", and China Construction Third Engineering Bureau and Three Companies will inherit the innovative genes and use the most outstanding construction solutions to benefit the world.
Correspondent Zhong Sansan, Yangtze River ** reporter Gong Ping).
Editor: Ding Hui].
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