April 7，《Seeking truth》Chen Yangyong, Editor-in-Chief of the Magazine, and His Delegation Came to Railway Construction Heavy Industry for Investigation。April 8，The research group published the title in Qiushi.《Railway Construction Heavy Industry：“Dig”Win Technology“No man's land”》The article，The original text is as follows：

《Seeking truth》Chen Yangyong, Editor-in-Chief of the Magazine, and His Delegation Investigate Railway Construction Heavy Industry

Railway Construction Heavy Industry：“Dig”Win Technology“No man's land”

“Practice tells us again and again，The key core technology is not to come.、I can't buy it、I can't get it.。Only by grasping the key core technology in their own hands.，Only in this way can the national economic security be fundamentally guaranteed.、National security and other security。”China Railway Construction Heavy Industry Group Co., Ltd.（Hereinafter referred to as“Railway Construction Heavy Industry”）Exhibition Hall of Original Technology Origin Achievements，General Secretary Xi Jinping's important exposition is very striking.。

Tiejian Heavy Industry was founded in 2007.，Focus on the research of underground construction equipment and rail transit equipment、Design、Manufacture、Service。In recent years，Enterprises insist on promoting the independence of major technical equipment.、Localization，Pay close attention to tackling key core technologies，It has become one of the few roadheaders in the world.、Drilling and blasting method、It is a professional enterprise capable of developing various tunnel construction equipment such as cold excavation.，High-end underground engineering equipment enterprises with completely independent intellectual property rights。2022，The company ranks first among the global tunnel engineering equipment manufacturers.、No.1 professional manufacturer of construction machinery in China。Recently，The research team of Qiushi Magazine entered the Railway Construction Heavy Industry in Changsha City, Hunan Province.，Understand the development process of the enterprise on the spot，Feel the brave technology“No man's land”Innovative practice。

April 7, 2023，Railway Construction Heavy Industry Changsha No.2 Industrial Park，Workers work on the shield machine production line.。Reporter of Hunan Daily  Gu Pengbo/Photograph

May 28, 2021，General Secretary Xi Jinping at the 20th Academician Congress of the Chinese Academy of Sciences、The 15th Academician Congress of the Chinese Academy of Engineering、In his important speech at the 10th National Congress of the China Association for Science and Technology, he expounded“New breakthroughs have been made in high-end industries”Shi pointed out，“The shield machine with the largest diameter was launched smoothly.”。

“This is the largest diameter shield machine developed by our country so far mentioned by the General Secretary.——‘Jinghua’”。Stand in front of the model in the showroom，The commentator introduced。“Jinghua”The excavation diameter of the shield machine is 16..07 meters，The whole machine is 150 meters long.，Total weight 4300 tons，Successfully applied in the reconstruction project of Beijing East Sixth Ring Road，And selected countries one after another.“The 13th Five-Year Plan”Science and Technology Innovation Achievement Exhibition and“Strive for a new era”Theme Achievement Exhibition，It marks that China's super-large diameter shield complete technology ranks in the forefront of the world.。

September 27, 2020，“Jinghua”Offline in Changsha No.1 Industrial Park of Railway Construction Heavy Industry。Reporter of Hunan Daily  Gu Pengbo/Photograph

Shield machine is the highway in our country.、High-speed rail、The core complete set of equipment for urban underground transportation construction and strong infrastructure capacity output.。Once upon a time，Shield machine technology has long been monopolized by foreign countries.，“Foreign brand”The shield machine almost occupies the domestic market.，The price is high。Zhang Shuaikun, vice president of TBM Research and Design Institute of Railway Construction Heavy Industry, told us.：“The core technology does not come by begging.。China Railway Construction Heavy Industries started from scratch.，Independent innovation，If you don't have a drawing, you can draw by yourself.。Everyone is holding a breath.，It is to develop a shield machine belonging to the Chinese people.。”

Through unremitting efforts to tackle key problems，Researchers have successively broken through from the cutter head to the hydraulic system.、Control system and a series of key core technologies，The construction technology of various complex geological environments has been mastered.，Overcome one world-class problem after another。Let's talk now“Jinghua”，Zhang Shuaikun is full of pride，“This is the first time that Chinese enterprises have successfully realized the industrial manufacture of 16 meters super-large diameter shield machine.，The development and application of the equipment has effectively consolidated the autonomous and controllable ability of the core technology of the domestic super-large diameter shield machine.”。

General Secretary Xi Jinping stressed that：“Independent innovation is the life of an enterprise，It is the enterprise that climbs the slope and crosses the barrier、The root of development and growth。”China Railway Construction Heavy Industry Co., Ltd. has continuously intensified its efforts to innovate key core technologies.，It has independently developed different types of shield machines.，It has successfully realized the shield machine from scratch in China.、From import to export、From“Run with”To“Lead the race”A leap forward。

November 29, 2022，By China Railway Construction Heavy Industries、The world's largest shaft boring machine jointly built by China Railway 15th Bureau Group“Dream”Offline in Changsha No.2 Industrial Park of Railway Construction Heavy Industry。“Dream”Set excavation、Slag tapping、Support、Guidance and other functions are integrated.，The whole machine is about 10 meters high.，Excavation diameter up to 23.02 meters。TBM used in tunnel construction generally advances in a lateral direction，The shaft boring machine, on the other hand, digs deep from the ground.。In order to meet the needs of super-large diameter excavation，Meanwhile, the excavation efficiency shall be ensured.，The R & D team has broken through the design technology of complete sets of mechanical caisson equipment for super-large diameter shafts.，The overall technology has reached the international advanced level.，It marks a new step in the scientific and technological research and application of underground engineering equipment in China.。

November 29, 2022，By China Railway Construction Heavy Industries、Jointly built by China Railway 15th Bureau Group“Dream”Offline in Changsha No.2 Industrial Park of Railway Construction Heavy Industry。Reporter of Hunan Daily  Gu Pengbo/Photograph

Continuous Evolution of Shield and Tunneling Technology，It is a microcosm of the independent innovation process of Railway Construction Heavy Industry.。China Railway Construction Heavy Industry insists on building full-face tunnel boring machine、Tunnel construction equipment and other 8 major industries，Establishment of National Enterprise Technology Center、National Industrial Design Center, etc.“Ten in one”Kechuang Platform；The proportion of R & D personnel is no less than 25%，Reaching more than 2000；The scale of R & D investment has increased year by year.，In recent years, the proportion of R & D expenditure has reached 7.27%、7.33%、9.19%。This series of scientific and technological research，It has brought about breakthroughs in key core technologies and enhanced the ability of independent innovation.。The world's first complete set of intelligent equipment for tunnel drilling and blasting method is applied to Zhengzhou-Wanzhou high-speed railway、Plateau railway and other projects；The world's first shield digging and anchoring machine creates a new record in the industry；The First Domestic Intelligent Six-line Cotton Picking and Baling Machine Breaks the Monopoly of Foreign Markets；Deepest subsea tunnel shield machine“Shenjiang No.1”；First research and development of digital prototype platform and digital twin system for underground engineering equipment；Carry out research on multi-mode rock breaking technology；Launch the world's first driverless self-wetting spraying trolley，Wait，Leading China's underground engineering equipment to high quality、Efficient、Green、Intelligent development。

“The report of the 20th National Congress of the Communist Party of China emphasizes that it should be guided by the strategic needs of the country.，Gather strength to tackle original and leading scientific and technological problems，Resolutely win the battle of key core technologies。This is the fundamental reason for our continuous development.。”Long Bin, Executive General Manager and Chief Engineer of Roadheader Division of Railway Construction Heavy Industry, said with emotion.。