Media Focus on Railway Construction Heavy Industry to Build the Largest Diameter (16.64 Meters) Shield Machine "Jianghai" Independently Developed by China

November 04, 2024

October 31，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，Refreshing the largest diameter created by China Railway Construction Heavy Industries in 2020（16.07 meters）Shield Machine record，It has been widely reported by the mainstream media.。

China Central Radio and Television Station

“Jiang Hai Hao”Less than 24 hours offline，CCTV channels include news broadcast、Live news room、China News、Economic information broadcasting and other 11 columns，Uninterrupted push of relevant content，Causing widespread concern。

General Station CCTV《News broadcast》

General Station CCTV《Live news room》《China News》《Economic Information Broadcasting》《Noon news》《Morning News》《Punctual finance》A collection of 10 reports.

Railway Construction Heavy Industry，Zan 42

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People's Daily

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This newspaper, Changsha, October 31（Reporter Yang Xun）October 31，Maximum excavation diameter of one set is up to 16.The 64-meter super-large diameter Shield Machine was launched in Changsha, Hunan Province.，This is the largest diameter shield machine independently developed in China so far.，It marks a new breakthrough in the industrialization of domestic super-large diameter shield machines.。

This shield machine is named“Jiang Hai Hao”，China Railway Construction Heavy Industry Group、Jointly built by China Railway 14th Bureau Group，The whole machine is about 145 meters long.，The total weight is about 5000 tons，It will be applied to the longest underwater shield tunnel in the world.——Construction of Haitai Changjiang Tunnel。

Haitai Yangtze River Tunnel is located in Jiangsu Province.，It has a very long distance、Extra large diameter、Super high water pressure、Super deep burial、Complex working conditions and the like.。Shield machine development team applies independent research and development technology，Millimeter-level precision control of shield tunnel settlement will be realized.，Ensure construction safety and efficiency。

It is understood that，The industry usually refers to shield machines with a diameter of 14 meters or more as super-large diameter shield machines.。“Jiang Hai Hao”Successfully offline，It marks a new leap forward for Chinese enterprises in the development and application of 16-meter-class super-large diameter shield machines.，It has formed the industrialization development capability of the whole industry chain of super-large diameter shield machine.。

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People's Daily Overseas Edition

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Xinhua News Agency

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Guangming Daily

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Economic Daily

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China Daily

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Science and Technology Daily

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People's Political Consultative Conference Daily

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China News Service

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Worker's Daily

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Weibo hot search、Tik Tok hot search is the third

Weibo hot search、Hot search on Tik Tok……Topic#China's independently develope shield machine with that largest diameter#Dominate the major new media platforms，Happy to mention the hot search，Catch countless eyes。

Weibo hot search is the third，3 million+Amount of reading

Tik Tok hot search is the third，Less than 24 hours，The number of hits broke 10 million+

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Overseas social media platforms

The whole world has blown up.“Jiang Hai”Hot，Independently developed、The largest made in China、Jiang Hai Hao……These hot search terms，AtFacebook、Twitter、YoutubeAnd other overseas social media platforms have aroused heated discussion。

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Hunan Daily

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“Jiang Hai”Offline reloader advanced

——New breakthroughs have been made in the development and industrialization of domestic super-large diameter shield machines.

Hunan Daily All Media Reporter Cao Xian Correspondent Hu Qing

Autumn in October，“Made in Hunan”Good news came。October 31，China's independent research and development、Maximum excavation diameter up to 16.64 meters super-large diameter shield machine“Jiang Hai Hao”Offline in China Railway Construction Heavy Industry Group。

Hunan's manufacturing industry continues to perform the story of self-transcendence.。September 27, 2020，Maximum excavation diameter up to 16.07 meters“Jinghua”Shield machine rolled off the production line of China Railway Construction Heavy Industry。Four years later，China Railway Construction Heavy Industry Co., Ltd. broke its own record at one stroke.。

Shield machines with a diameter of 14 meters or more are called super-large diameter shield machines in the industry.，It is a well-deserved heavy weapon of a big country.。From 16.07 meters to 16.64 meters，Heavy equipment is more“Big”Behind，What's the mystery?？

Stronger

“The diameter has only increased by 0..More than 5 meters，But the challenge is not small.。”Fan Ruiqiang, senior engineer of China Railway Construction Heavy Industry Group Roadheader Research and Design Institute, said.。

16.The large diameter of 64 meters means that the cutter head of the shield machine needs a large torque for excavation.，Higher main drive bearing load。“Jiang Hai Hao”First use in China 8.6 m main bearing，Has high bearing capacity and long service life，Achieve“A big horse pulls a small car”The effect of。

In the process of tunneling，The main drive of the shield machine cannot be replaced，If something goes wrong，Only underground.“Get down”。 Before ，It is unpredictable whether the main bearing will be damaged by the impact load caused by the vibration of the cutter head of the shield machine.，Whether the cutterhead is caked with mud cake, which affects the slagging, etc.，Operators are also required to go to the front cabin for observation under pressure.。

“To avoid overloading the main bearings，We have a telescopic function and monitoring system for the main drive.。”Fan Ruiqiang introduced。The telescopic camera device performs 360-degree rotation and vertical pitching shooting，Observe the status of the excavation section at any time；The monitoring system comprehensively monitors the working state of the main drive.，Bearing load can be found、Damage of small particles, etc.，And make timely adjustments.。

“Jiang Hai Hao”It will be used for the construction of Haitai Yangtze River Tunnel.，This is the longest highway underwater shield tunnel in the world.。You Shaoqiang, chief engineer of Haitai Yangtze River Tunnel Project of China Railway 14th Bureau, said.，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 high pressure may cause the shield shell to deform.，Even break down the shield machine.。

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。

Update

“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 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.，But in the case that enterprises specializing in robotics 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。

Smarter

“The difficulty of shield machine control is not in operation.，And in decision-making。”Fan Ruiqiang introduced，By collecting a large number of equipment operation data，The development team has established a database.，Install intelligent auxiliary system for shield machine。The shield driver shouted“Xiaotie、Xiaotie”，The tunneling parameters can be obtained.、Fault handling and other reference suggestions。

China Railway Construction Heavy Industry Group official said.，“Jiang Hai Hao”Successfully offline，It marks a new leap forward for Chinese enterprises in the development and application of 16-meter-class super-large diameter shield machines.，It has formed the industrialization development capability of the whole industry chain of super-large diameter shield machine.。

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Hunan Satellite TV

，Duration 01:58

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Liaoning Daily