The first domestic 16m super-large diameter shield machine

“Jinghua”Out of the hole today

On the morning of June 28th，Good news from the site of Beijing East Sixth Ring Road Reconstruction Project，By China Railway Construction Heavy Industries、First Group、The first domestic 16-meter super-large diameter shield machine jointly built by China Railway 14th Bureau“Jinghua”Perfect out of the hole，To realize the smooth completion of the West Line Tunnel of Beijing East Sixth Ring Road Reconstruction Project，It marks the completion of the first line of the longest shield expressway tunnel in China.，This national level“Science and technology demonstration project”Significant progress has been made。

The first domestic 16m super-large diameter shield machine“Jinghua”Live video of the exit

  

“Jinghua”Out of the cave

Stunning coming out and famous in Beijing

September 27, 2020，“Jinghua”Offline in Changsha No.1 Industrial Park of Railway Construction Heavy Industry。This one“Big Mac”The maximum excavation diameter of the shield machine is 16..07 meters，The whole machine is 150 meters long.，Total weight 4300 tons，So far, the largest diameter shield machine developed in China has been born.。

The equipment is huge，Like a steel dragon lying across the workshop.，Over 5 stories in height，Cutterhead painting extracts visual elements from Peking Opera facial makeup，It takes the red facial makeup representing loyalty, bravery and righteousness in Peking Opera as the design prototype.，The appearance is bright and striking，Highlight the regional cultural characteristics of Beijing。

“Jinghua”Super burning video

For a moment，“Jinghua”Message of successful offline，Attracted the People's Daily、Xinhua News Agency、China National Radio、Dozens of central mainstream media and local media, such as CCTV, concentrated on interviews and reports on the spot.，The network is bigVFollow up synchronously，Super Burning Mixed Cut Video on Sina Weibo、Bilibili and other network platforms are widely disseminated.，Read more than 50 million，More than 1.25 million video views。Same year，The largest shield machine made in China“Jinghua”Selected in Railway Construction Heavy Industry Offline“Top Ten News of China's Industry in 2020”。

  

Hard-core origin has attracted much attention

Time sequence comes to May 28, 2021.，The 20th Academician Congress of the Chinese Academy of Sciences、The 15th Academician Congress of the Chinese Academy of Engineering and the 10th National Congress of the Chinese Association of 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，“Jinghua”It has also become from Made in China to Created in China.，Cases of promoting high-quality development。

  

October 26 of the same year，General Secretary Xi Jinping Visits the Country“The 13th Five-Year Plan”Science and Technology Innovation Achievement Exhibition，“Jinghua”（Model）As a representative of the industry facing the main battlefield of the economy, it shines on the stage.，It has become a national advanced manufacturing industry and a deep integration of scientific and technological innovation.，A typical sample of boosting the technological upgrading of manufacturing industry。

  

September 27, 2022，“Jinghua”（Model）Appearance“Strive for a new era”Theme Achievement Exhibition，Once again accept the inspection of the party and state leaders。

June 2023，“Jinghua”（Model）Exhibition Hall of History of the Communist Party of China in Tibet。

Set records and win the future

East Sixth Ring Road Reconstruction Project starts from Beijing-Harbin Expressway in the south，North to Luyuan North Street，Design speed 80 kilometers per hour，The total length is about 16 kilometers.。Among，The underground reconstruction section is about 7.The 4 km tunnel is constructed by shield method.，Separate double-hole arrangement，Divided into three layers，The upper layer is the smoke exhaust channel.、The middle layer is a 3-lane highway.、The lower level is the evacuation and rescue channel.，Excavation diameter up to 16.07 meters，Maximum buried depth 75m，It is the deepest underground tunnel in Beijing.。

Shield tunnel construction of the project，Integration“Extra large diameter、Very long distance、Ultra-deep covering soil、Hypersensitive environment”And many other construction difficulties.，Can be called tunnel construction technology“The ceiling”。The R & D team of China Railway Construction Heavy Industry is“Jinghua”The shield machine is equipped with many advanced innovative technologies and many independent core key technologies.，It effectively guarantees the rapidity and safety of shield tunneling under complex geological conditions.，The shield machine passes through the sandy soil smoothly.、Water-rich and highly compact sand layer、Complex geology such as silty soil and cohesive soil alternating layer。

  

From“Jinghua”Since the start，Research and development of China Railway Construction Heavy Industry、The service team always sticks to their posts.、Overcome difficulties，Close cooperation with China Railway 14th Bureau Group Co., Ltd.，Identify and resolve field issues in a timely manner，Ensure the safety of project construction、Quality、Efficient，And achieved a maximum daily footage of 24 meters.、The maximum monthly footage is 542 meters.。

September 25, 2022，With“Jinghua”A precise exit hole.，The middle air shaft of the shield machine was successfully received by the West Line Tunnel of Beijing East Sixth Ring Road Reconstruction Project.，It marks the first section of the longest shield expressway tunnel in China.。

  

It is understood that，The reconstruction project of the East Sixth Ring Road in Beijing is the sub-center of Beijing.“Create an innovative development axis to sew up urban functions、Effectively Weaving Urban Space、Solving the problem of dividing cities by expressways”A landmark project。After opening to traffic，It will promote the integration of Tongzhou urban area and the administrative office area of the city's sub-center.，To improve the level of transportation services in Beijing，Promote the integration of Beijing-Tianjin-Hebei regional transportation，It is of great significance to build a comprehensive transportation system.。This time，“Jinghua”Help the smooth penetration of the West Line Tunnel，Significant progress has been made in the reconstruction project of the East Sixth Ring Road.。