Since 2024，China Railway Construction Corporation System-wide Solid Promotion of State-owned Enterprise Reform Deepening and Promoting Action，Focus on the key and difficult points of reform，A series of powerful measures have been taken.，Many effective explorations have been made.。China Railway Construction WeChat Public Number Launched《Micro-observation of reform》Special column，Deeply excavate the reform and development of relevant units、Scientific and technological innovation、Fresh experiences and typical practices in transformation and upgrading，For the whole system to learn from。Today，Let's seeHow can China Railway Construction Heavy Industries achieve 0 in 4 years?.A span of 57 meters。

From diameter 16.07m shield machine“Jinghua”，To diameter 16.64m shield machine“Jiang Hai Hao”，0.A jump of 57 meters，It is a self-breakthrough of an enterprise.，It is also the self-transcendence of an industry.，It marks a new breakthrough in the industrialization of domestic super-large diameter shield machines.。0.Behind the 57-meter crossing，What's the mystery?？

Connect the river to the sea，“Jiaolong”Shang Xin。October 31, 2024，Maximum excavation diameter up to 16.64 meters“Jiang Hai Hao”Offline in Changsha No.2 Industrial Park of Railway Construction Heavy Industry，This is the largest diameter shield machine independently developed in China so far.。September 27, 2020，The largest domestic product of the previous generation，Excavation diameter 16.07 meters“Jinghua”The shield machine is also offline in China Railway Construction Heavy Industry.。Four years.，China Railway Construction Heavy Industry Co., Ltd. broke its own record at one stroke.。

The largest diameter independently developed by China（16.64 meters）Shield machine“Jiang Hai Hao”Get off the production line of China Railway Construction Heavy Industry

The most important weapon of the country，More than big

May 28, 2021，The 20th Academician Congress of the Chinese Academy of Sciences、The 15th Academician Congress of the Chinese Academy of Engineering、At the 10th National Congress of the China Association for Science and Technology，General Secretary of the CPC Central Committee、President of the country、Central Military Commission Chairman Xi Jinping pointed out.“The shield machine with the largest diameter was launched smoothly.”。At the same time，At《Questions and Answers on the Study of Xi Jinping's Socialist Thought with Chinese Characteristics in the New Era》Medium，The first domestic 16m super-large diameter shield machine“Jinghua”It has also become from Made in China to Created in China.，Cases of promoting high-quality development。

《Questions and Answers on the Study of Xi Jinping's Socialist Thought with Chinese Characteristics in the New Era》（Page 243）June 28, 2023，“Jinghua” Perfect out of the hole，Helping the First Line of the Longest Shield Expressway Tunnel in China。“‘Jinghua’It's a good start.，16.07 has also become a spur for us to continue to overcome difficulties.、Power for developing larger diameter shield machine。”2023“Big Country Craftsman of the Year”，Project leader of large diameter shield machine project of China Railway Construction & Heavy Industry、Senior engineer Zhang Shuaikun is proud and proud.。

“Jinghua”The most important weapon out of the cave country、More than big，Beyond 16.The number 07 is not difficult.，What is difficult is the synchronous upgrade of the functional data of the equipment.，As well as a perfect fit with the engineering used。“The diameter has only increased by 0..57 meters，But the difficulties and challenges behind it are not small.。”Fan Ruiqiang, senior engineer of TBM Research and Design Institute of Railway Construction Heavy Industry, described this.“Jiang Hai Hao”The road of research and development。“Jiang Hai Hao”The Haitai Yangtze River Tunnel is the longest highway underwater shield tunnel in the world.。In the 9315 meters long distance single head tunneling，The shield machine needs to face a maximum burial depth of 75 meters.、7.Super high water pressure of 5 bar，There are also unknown geological conditions and water vapor corrosion、Sandstone wear and other challenges and tests。For example，7.Five bars of high water pressure is equivalent to an area size of a fingernail.，To bear 7.Five kilograms of pressure.。If the design is inadequate，Such a large pressure may cause the shield shell to deform.，Even break down the shield machine.。

Sketch Map of Haitai Yangtze River Tunnel Heavy Equipment Survives for Engineering，The more difficult the project is, the greater the investment in upgrading the heavy equipment.。In Railway Construction Heavy Industries，Always keep the ratio of R & D investment to total revenue not less than 7%，The total ratio of R & D personnel to employees shall not be less than 30%。2024 1- October ，The intensity of R & D investment has reached 9.44%。At the same time，China Railway Construction Heavy Industry has also set up a state-level enterprise technology center.、National Industrial Design Center、Postdoctoral Research Workstation、Provincial Key Laboratory、Academician expert workstation, etc.“Ten in one”Scientific and technological innovation platform。

The most important weapon of the country，More than new

“Jiang Hai Hao”When crossing the Yangtze River and the levees on both sides，The settlement shall be controlled within 1 cm.，The construction is difficult。However，Shield construction needs to pass through muddy silty clay、Complex geological zones such as silty-fine sand composite strata。Clay and fine sand mixed together.，Plus silt，The shield machine is very easy“Paste the cutter head”。

Development team“A two-pronged approach”，At the same time, the scouring force and opening rate of the cutter head are increased.，Configure high pressure、Central scouring system with large flow and mud cake early warning system for cutter head，Ffectively distinguish and reduce that risk of the cutterhead caking mud cakes，Improve bottom slag discharge efficiency。

The R & D personnel discuss the design details in the workshop.

“The new intelligent assembly system of segment connection components adopted this time is also the first use in China.。”Fan Ruiqiang introduced。 Before ，The segment assembly of shield machine mainly adopts bolt connection.，This time, a new type of wedge component is used.，And axial extrusion is realize、Longitudinal tension，So that that segment are combined more closely，Achieve better sealing effect。

Fan Ruiqiang said，It looks like a small innovation.，In the case that enterprises specializing in robots can't do it.，The team tries to find ways，It took half a year to do the experiment over and over again.、Improve again，To finally find the best solution.。

“Compare‘Jinghua’，‘Jiang Hai Hao’Application of the updated fourth generation of synchronous injection of double liquid slurry technology，Added detection function，The grouting effect can be observed synchronously。”Fan Ruiqiang said。

It is understood that，“Jiang Hai Hao”Was manufactured in just 10 months.，But in the past year or so,，Research and development team's cutter head、Cutting tool、Main drive、Technical reserve of key components such as mud circulation、Special research，Solve all kinds of problems one by one，Ensure efficient and safe construction。The average age of the R & D team members is less than 35 years old.。

In Railway Construction Heavy Industries，“Go to the capable”Has become the norm，By improving the management mechanism of science and technology，Insist on scientific research projects“Uncover the list and take command”And team self-organization model，Encouraging research on frontier technologies and basic technologies，Supporting young scientific and technological talents to serve as project chief engineers，Implement two-way selection of R & D personnel and project chief designer，Stimulate innovation vitality，A total of 193 projects have been implemented.。

New blood、New heavy equipment，There's more going on here.“Make a legend”……

The most important weapon of the country，More than all

As the core enterprise of China Railway Construction Industrial Manufacturing Sector，This year，China Railway Construction Heavy Industry Co., Ltd. firmly grasps independent research and development、Innovation-driven key element，Improve the resilience and safety level of the industrial chain and supply chain.，Accelerate the pace of digital transformation of manufacturing industry，Continuously explore and build future industries，Accelerate the development of new quality productive forces according to local conditions。

The sun is blazing in the sky，The surface is an endless Gobi desert.，400 meters underground.，A large sea of coal is being mined.。This is Xiaobaodang Coal Mine in Yulin, Shaanxi Province.，33 million tons per year，Is the largest coal mine in the world.。

On the roadway working face of more than 40 square meters，Intelligent complete set of equipment for large-section rapid excavation and anchoring developed by China Railway Construction Heavy Industry Co., Ltd.，Carry out efficiently and orderly“Detective-Dig-Branch-Yun”Full-process collaborative operation。

5x more efficient，Monthly footage breaks through 1750 meters，The new product cracked the previous coal mining equipment at one stroke.“Dig”And“Anchor”The worldwide problem of asynchrony，The traditional coal mining industry is being completely reshaped by the new quality productivity.。

The first domestic complete set of rapid driving and anchoring equipment for super-high roadway

From the shield machine、Drilling and blasting tunnel equipment、Railway switch，To the digging and anchoring machine、Cotton picking and packing machine、Plateau Space Station，2024，China Railway Construction Heavy Industry Co., Ltd.“Future Industry Sailing Action”，Build the original technology source in the field of intelligent tunnel engineering equipment at a high level；Officially approved in April 2024，Take the lead in the key technology and equipment project of mine kilometer-level full-face shaft roadheader.； June ，Under the auspices of China Railway Construction Corporation，Invite 10 units in the system，Around“Kilometer-level shaft boring machine、New energy storage equipment”The new direction of the war was discussed and laid out.。

Railway Construction Heavy Industry Underground Engineering Equipment and Rail Transit Equipment“Family photo”

Focus on the development of new quality productivity，Develop new products、Open up new markets、Enter a new field。Here，More than heavy equipment upgrades，To“New”And jump，Constantly explore and build future industries，Step by step towards deep underground space，Take on the Mission of a Great Power。