High! Really high!

What does a 70-story high bridge pier look like?

recently

Liangshan Yi Autonomous Prefecture, Sichuan Province

Jinyang River Three Gorges Lianxin Bridge completed and opened to traffic

This bridge is for the Yi people

Build a "fast track" for rural revitalization

Jinyang River Bridge is located in Jinyang County, Daliangshan, Sichuan.

Crossing the deep valley of Jinyang River

Although the bridge is only 757.7 meters long

But one of the piers is 196 meters high.

Equivalent to the height of a 70-story building

Let’s follow the perspective of the drone

What does a 70-story bridge pier look like?

Image source: Xinhua News Agency video screenshot

The Catwalk is here!

Flying in the air, crossing Lingding

Not long ago

Shenzhen-Zhongshan Link Lingdingyang Bridge

The “Catwalk” is fully connected

What is a "catwalk"?

A passage for cats to cross the river?

No, no, no!

This "cat path" is not that "cat path"!

So, what is a "catwalk"?

The "catwalk" is a bridge constructed during the construction of the suspension bridge.

Installed under the main cable

Temporary construction access road parallel to the main cable

The highest point of the "catwalk" is about 270 meters above sea level.

The lowest point is 105 meters from the sea surface

It is currently the highest "catwalk" in the world.

The “catwalk” is laid in a U-shaped arc

The total length of a single "catwalk" is about 3,000 meters

The bottom is made of hollow steel mesh

Workers work on the offshore construction catwalk of the Lingdingyang Bridge of the Shenzhen-Zhongshan Link (photo taken on June 7).

(Photo by Xinhua News Agency reporter Deng Hua)

The "catwalk" is a suspension bridge superstructure operation

Extremely important high-altitude construction platform

Also known as: the hanging "lifeline"

Use of the “Catwalk”

Almost throughout

The whole process of construction of the suspension bridge superstructure

A container ship passes through the Lingdingyang Bridge of the Shenzhen-Zhongshan Link under construction (photo taken on June 7).

(Photo by Xinhua News Agency reporter Deng Hua)

On the "Catwalk", builders will complete

Bridge cable traction and cable tightening

Cable clamp, sling installation, main cable winding

And a series of subsequent processes such as steel box girder hoisting

It can be called "high-altitude scaffolding"

How was the “Catwalk” built?

Facing a vast ocean

How to lay the “catwalk”?

How to take the first step?

It turns out that before the catwalk was laid

A pilot cable is needed to "explore the way" across the river

In the construction of domestic large-span suspension bridges

Usually used

Ferry pulling, rocket launching, hot air balloon

Or drone traction, etc.

Complete the pilot cable crossing the river

Considering that the bridge is located in the open waters of the Pearl River Estuary

Monsoon and gusty weather are frequent

Finally, the ship pulling solution was adopted

February 15, 2022

The tugboat is pulling

A 2000m long leader cable

Crossing the Lingdingyang Channel

The two main towers are connected by a line

Laying an important foundation for the construction of the "catwalk"

With the guide rope, we can "matchmake"

The construction of the "catwalk" can be gradually carried out

"Catwalk" is an important passage for superstructure construction

There must be reliable load-bearing support

The load-bearing cable plays such a role

There are 12 load-bearing cables on one side of the bridge.

Single load-bearing cable

54 mm in diameter and about 3,000 meters long

The ultimate tensile strength is 1960 MPa and weighs about 36.6 tons.

(Photo by Xinhua News Agency reporter Deng Hua)

With load-bearing cables

A surface layer (also called "surface net") is also laid on it.

To fill the gaps between the load-bearing cables

And install the side nets on both sides to form a "guardrail"

For construction workers

The role of safe passage and operations

The catwalk on one side of the Lingdingyang Bridge is about 4 meters wide

The surface mesh is composed of two layers of galvanized hollow steel wire mesh.

The length of a single side net is about 3000 meters

Lingdingyang Bridge

Mainly from the top of the tower to the bottom

Install the mesh step by step by dragging it in sections

The surface net is laid and the "catwalk" is connected

Builders can

Walking between the two main towers

It creates a spectacle of people shuttling across the sea!

Look how awesome China’s bridges are!

The total number of modern bridges in China

More than 1 million

The world's top 100 newly built buildings by humans in the 21st century

There are 90 in China

In addition to the "Catwalk"

And these bridges

Amazing

【 Beipanjiang Bridge 】

Beipanjiang Bridge (taken on January 29, 2022, drone photo).

(Photo by Xinhua News Agency reporter Tao Liang)

A bridge across Yunnan and Guizhou

Turning natural barriers into thoroughfares

Vertical height from bridge deck to valley floor: 565 meters

Equivalent to 200 floors

Beipanjiang Bridge is built on the clouds

The world's tallest bridge

Beipanjiang Bridge starts from Duge Town in the north

Cross the Nizhu River Grand Canyon

South to Lalong Village

Total length: 1341.4 meters

Driving on it

Traveling between mountains and valleys

Walking above the clouds

It's like being in heaven

【 Hong Kong-Zhuhai-Macao Bridge 】

(UAV photo, taken by Xinhua News Agency reporter Liang Xu on July 11, 2018)

Crossing the Lingdingyang

East to Hong Kong

Connected to Zhuhai, Guangdong and Macau in the west

The 55-kilometer Hong Kong-Zhuhai-Macao Bridge

Due to the high difficulty

It is called the "Mount Everest" of the bridge industry.

It has the world's longest undersea tunnel of 6.7 km

The 33 immersed tubes that make up the tunnel

Every section is comparable to

The size of an aircraft carrier

【Lhasa-Nyingchi Railway Zangmu Yarlung Zangbo River Bridge 】

(Photo taken by Xinhua News Agency reporter Jue Guo on September 20, 2020)

Zangmu Yarlung Zangbo River Double-track Bridge

Located in Jiacha County, Shannan City, Tibet Autonomous Region

Standing tall in the reservoir area upstream of the Zangmu Hydropower Station in the Sangda Canyon

Crossing the Yarlung Zangbo River with a depth of 66m

Total length 525.1m, two-way connecting tunnel

This bridge created

Multiple new records in the bridge field

Representing the same type in China and even the world

Bridge construction at the highest level

The main arch span of the bridge is 430m

It is the world's largest railway steel arch bridge.

The main arch diameter of 1.8m ranks first in the world among bridges of the same type

The one-time lifting volume of concrete in the pipe is up to 1022m³

Set a world record

For China

There is no bridge that cannot be built

Build roads through mountains and bridges over rivers

China's infrastructure continues to improve

"Longest, Highest, Biggest" Record

Showing the world China's speed and quality

"China Bridge"

It has become a bright business card of China

and an important symbol of comprehensive national strength

Witness the vigorous pace of building a strong transportation nation

Outlining the solid footprints of China's development

Awesome! Chinese Bridge!

Source: Communist Youth League Central Committee

Editor: Wang Zengyi

Proofreading丨Wang Yixun

Proofread by Chen Yuwen

On-duty editor: Dong Junjie