Add two new recruits in a day! The latest version of the "Underground Family" in China shows the iron | diameter | family

On August 8th,

Two shield tunneling machines from China Railway Corporation

"Yong'an" and "Longrun"

Offline in Jiangmen, Guangdong and Deyang, Sichuan respectively.

"Yong'an" is for the Guifengshan Tunnel

Tailored ultra large diameter dual-mode shield tunneling machine,

Excavation diameter of 14.29 meters,

Approximately equivalent to a 5-story building height,

For the largest diameter earth pressure/TBM dual-mode shield tunneling machine in China.

"Longrun" serves

The construction of the Dianzhong water diversion project,

Excavation diameter of 4.6 meters,

It is the world's smallest diameter single shield TBM for water diversion projects.

Two national treasures, one big and one small

On the same day, I embarked on my journey to the center of the earth.

"There is a divine boat in heaven, a dragon in the sea, and a shield in the earth."

As a powerful tool for entering the ground,

Shield tunneling machine is the construction of a great country

Essential core equipment.

In the 1990s,

Almost all domestic shield tunneling machines rely on imports.

Without technology, one must be slaughtered by others,

We have suffered this kind of loss for 20 years.

Are we Chinese people

Can't we make our own shield tunneling machine

This is not just the collective voice of engineers,

It is also a helpless feeling of being choked by the throat.

In this context,

The manufacturing of shield tunneling machines in China has gone through

20 years of development, catching up, and competition.

Ultra large diameter, ultra small diameter

Key technologies such as equipment design and manufacturing under extreme operating conditions,

We will conquer one by one.

From self-reliance and independent research and development,

To go abroad and expand overseas,

And then to breakthroughs in key technologies

Let the national shield be equipped with "Chinese chips",

Domestic shield tunneling completed

From nothing to something, from something to excellence

A comeback from excellence to strength.

Not long ago,

Domestic maximum diameter shield tunneling machine

The "Jinghua" broke through the wall,

This marks the longest shield driven highway tunnel in China——

The western tunnel of the Beijing East Sixth Ring Road renovation project has been successfully completed.

↓↓↓↓

A shield tunneling "driver" team that has been passed down for four generations

For the technological self-reliance and self-improvement of China's shield tunneling industry,

With decades of perseverance, focus, and relay,

The most inspiring performance of "Four Generations Together" by central enterprises.

Nowadays,

Shield tunneling machines are no longer just a source of pride for the Chinese people,

To become a more tangible tool for creating beauty,

Widely used in various types of infrastructure construction.

Just taking this year as an example,

Xiaoxin will take stock of your cultivation in various regions of the north and south of the Yangtze River,

Suitable for various working conditions and application scenarios of various types of shield tunneling machines.

The business map of China's strongest "underground family",

It can be seen that——

Applied to urban rail transit——

On July 20th, the composite TBM for the left track of Chongqing Metro Line 24 from Zhuyuancun Station to Chongqing East Station, constructed by China Railway Construction Kunlun Group and China Railway 20th Bureau Group, successfully departed. This is the first ultra large slope shield tunneling construction in China's urban rail transit industry.

The composite TBM Flame No. 7 has a total length of 82 meters and an installed power of 1750 kilowatts. The starting section will enter a circular curve section with a slope of 43 ‰ and a radius of 500 meters.

Applied to intercity railways——

On March 12th, at the construction site of the Shenzhen Dalian Intercity Railway Section 1 project undertaken by China Energy Construction Gezhouba Municipal Engineering Co., Ltd., the shield tunneling machine "Zhumeng" slowly started and successfully started. "Zhumeng" is a composite earth pressure balance shield tunneling machine that undertakes the excavation task of the 2693-meter tunnel on the right side of the shield tunneling section from T4 hub station to Airport East station.

The shield body of the "Dream Building", along with its supporting equipment, has a total length of about 125 meters and weighs about 1260 tons. The maximum propulsion speed is 80 millimeters per minute, and the excavation diameter is 9.14 meters. The entire process of propulsion, excavation, and assembly is automated, forming in one go, reducing the risk of shield tunneling construction and achieving fast, efficient, and safe excavation.

Applied to mountain tunnels——

On June 16th, the "Yangtze River" shield tunneling machine of the Chongqing Qianjiang section of the Chongqing Hunan high-speed railway slowly rotated the cutterhead inside the 149 meter deep tunnel in the Nanshan area of Chongqing, initiating the most difficult river crossing operation, marking the official entry of the country's first high-speed railway tunnel crossing the Yangtze River into the shield tunneling construction phase.

The Chongqing Yangtze River Tunnel is the longest underwater high-speed railway tunnel in China and the first high-speed railway crossing the river in the upper reaches of the Yangtze River. It is known as the "First Tunnel of the Yangtze River High Speed Railway with a Distance of 10000 Miles". Its shield tunnel section is 3845 meters long and the crossing section is 1282 meters long. To overcome the difficulties, China Railway 14th Bureau has tailored a mud water balance shield tunneling machine, which is the first shield tunneling machine in China that is completely assembled, started, received, and dismantled inside a mountain tunnel.

Applied to underwater tunnels——

On June 9th, in the receiving well on the right line of the Shenzhen Mawan Cross Sea Passage, a 15.53 meter diameter "Mawan" mud water balance shield machine broke through the rock, marking the completion of the largest diameter underwater shield tunnel under construction in China, the right line of the Shenzhen Mawan Cross Sea Passage, jointly constructed by China Railway Southern and China Railway Tunnel Bureau.

The shield tunnel section on the right line of the Ma Wan Cross Sea Passage, which is connected this time, has a total length of 2063 meters, including 1100 meters in the sea area, and is a control project for the entire line. During the sea crossing excavation process, the project achieved a national record for the highest daily excavation of 10 meters for underwater large shield tunneling.

Chinese Shield Tunnels Going Abroad——

In July of this year, the longest underwater road tunnel in Poland, the Hivino Ujchche Tunnel, was officially opened. The cross river commuting time for residents on both sides of Uznan Island and Wallin Island in Poland was reduced from 40 minutes to 4 minutes, completely rewriting the local century long history of commuting by ferry.

To ensure the smooth completion of excavation tasks, China Railway Equipment, a subsidiary of China Railway Industry, has customized a super large diameter slurry water balance shield machine for it. The equipment has a cutterhead diameter of 13.46 meters, a total length of about 105 meters, and a total weight of over 2700 tons.

Chinese shield tunneling, precise innovation;

The important weapon of the country, gathering momentum to move forward;

Central enterprises in infrastructure construction, with ingenuity passing through;

Digging through the ground and crossing the sea, reaching through tunnels and passages.

Give a thumbs up to the "shield tunneling family"!