Tunnels are not uncommon in Shenzhen
But a tunnel has two lanes
Have you seen it~
Recently, it has attracted much attention
✨ Spring Breeze Tunnel ✨
New progress!
👇
The Chunfeng Tunnel was successfully completed
With the smooth entry of the "Chunfeng" shield machine into the receiving steel sleeve, Shenzhen's first single-hole double-layer structure tunnel - Chunfeng Tunnel was successfully completed.
Before the Chunfeng Tunnel is completed, it needs to pass through the port supervision area for a long distance underground, and faces multiple risks.
On the basis of the original construction plan for high-risk areas, the project department will re-evaluate, re-evaluate and refine to effectively ensure the overall safety of shield tunneling, the surrounding environment and personnel and property.
The better news is that the next step of the Chunfeng Tunnel is to speed up the construction of the lower lane slab, side wall, upper lane slab, mechanical and electrical and decoration decoration of the tunnel, and strive to complete and open the tunnel to traffic by the end of 2024.
Single-hole, double-decker tunnel
The Chunfeng Tunnel Project starts from 🚏 the west of Binhe Avenue and connects with Binhe Avenue on the east side of the interchange, and goes east to 🚏 the east side of Beidou Road along Henan Road.
The west side of the Xinxiu Interchange is connected with the municipal connection line of the Eastern Transit Expressway, with a total length of 5,078 meters, of which the shield section is 3,603 meters long, with a design speed of 60 km/h, and a slurry balance shield with a diameter of 15.8 meters is used for construction.
The Chunfeng Tunnel is innovatively designed as the first "single-hole double-layer" structure motor vehicle tunnel in Shenzhen, and also the first municipal highway tunnel constructed by shield method in Shenzhen.
The tunnel is divided into two lanes, with two lanes in one direction and a continuous emergency parking strip, with a design speed of 60 km/h, which is a special passage for passenger cars.
The average depth is less than 20 meters
As an underground tunnel, the Chunfeng Tunnel is also very deep, with an average depth of less than 20 meters, with the deepest reaching 49 meters.
The Chunfeng Tunnel is Shenzhen
The first municipal road tunnel constructed using the shield method
Among them, the "Chunfeng" shield machine played an important role
↓↓↓
EPBs with a height of more than 5 floors
What is a TBM?
Simply put, it's like a giant earthworm
A round and large tunnel is "drilled" underground
The "Chunfeng" shield machine, which expands the territory underground and breaks rock and gravel, is a "big country heavy weapon" independently developed and manufactured by the mainland and tailored for the project.
It is more than 5 floors high, 135 meters long, weighs 4,800 tons, and has an excavation diameter of 15.80 meters.
The excavation section of the "Chunfeng" is 6.3 times that of the conventional metro shield machine, with a thrust of up to 24,600 tons, which is equivalent to 24 times that of the Long March 5 launch vehicle, and the total installed power of more than 11,500 kilowatts, which is equivalent to the total traction power of the "Fuxing" high-speed railway.
But even if it is such a "violent" spring breeze
There are also many challenges in the project
▼
At the same time, the geological layers of the zone it crosses are soft and hard, which brings great challenges to the "steel dragon" to move forward.
"Chunfeng" is arranged with 324 knives on the whole surface plate, which is equivalent to the "steel teeth" of shield construction, due to the complex geological structure of Luohu area, the highest rock strength is equivalent to about 6 times that of daily construction projects.
At present, the "Chunfeng" knives are replaced frequently, and the average ring needs to be replaced about 1.5.
In addition, the project is "commanded" by back-end experts to achieve "one ring, one research and judgment" and "one ring and one summary" to ensure construction safety.
After the completion of the Chunfeng Tunnel, a three-dimensional traffic corridor of "Chunfeng Road Elevated + Chunfeng Tunnel" will be formed, which will break through the traffic bottleneck of Chunfeng Road, greatly improve the traffic capacity, and improve the traffic efficiency of the South Ring Expressway System.
A thousand words come together into one sentence
Spring Breeze Tunnel
Come on!!
Source: Shenzhen Transportation
Overall integration: Luohu release
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