How difficult is it to get from Dalian to Yantai?

How difficult is it to build a cross-sea bridge? Yantai to Dalian is only 150km. Why not build a bridge?

Fanfeikop

2022-8-27 15: 44 Liaoning

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Text/Extraordinary Popular Science

Do you know how close Yantai in Shandong and Dalian in Liaoning are? The straight-line distance is only 150 km, but we need to detour from Dalian to Yantai 1400 km, which is simply terrible. At this time, many people will ask, why not build a cross-sea bridge between Dalian and Yantai?

How difficult is it to build a cross-sea bridge?

From the map, Shandong Peninsula and Liaodong Peninsula are like "two arms" encircling Bohai Bay, so the straight line distance between Dalian at the top of Liaodong Peninsula and Yantai in Shandong Peninsula is very short.

Dalian, backed by the old industrial base in Northeast China and close to Japan and South Korea, can be said to be an important link in the trade circle of China, Japan and South Korea.

If a cross-sea bridge can be built between Dalian and Yantai, it is equivalent to opening up the links between Northeast China and Central China, and it can further give play to the foundation and labor advantages of the old industrial base in Northeast China.

For Yantai at the other end, it will become a link between Northeast China and Central China, South China and even the whole South. After that, whether it is transportation, industry or tourism, it will be greatly improved under the influence of links.

For example, in order to promote the interconnection between Hong Kong and Zhuhai, China has built the longest sea-crossing bridge in the world-the Hong Kong-Zhuhai-Macao Bridge, which directly shortens the journey from more than four hours to 30 minutes, making people's travel very convenient.

If Dalian and Yantai were changed, the time gap would definitely be larger than Hong Kong, Zhuhai and Macao. But since such a project is beneficial to the development of both places, why has there been no news of this bridge? We continue to look down.

Do you think there is a chance to build a cross-sea bridge between Dalian and Yantai?

In fact, this idea is not without. Many factors have been taken into account for the delay in starting work.

The first is the difficulty of project construction. The longest sea-crossing bridge in the world mentioned above is only 55 kilometers, and the whole project cost is about 70 billion. The straight-line distance from Dalian to Yantai is also150km, which is three times the total length of Hong Kong, Zhuhai and Macao, but the construction is far more difficult than three times, and the cost may reach 300 billion.

Secondly, the location of the bridge is also very special. It happens to be located on the Tan-Lu fault zone, which is a main fault zone in a series of giant fault zones in Northeast China on the East Asian continent.

Since ancient times, the seismic activity here has never stopped, which can be regarded as an active fault zone. Once an earthquake occurs, it will inevitably bring certain dangers and losses to the bridge.

In addition, the weather in Bohai Bay is also known as "smelly face". Although the four seasons are distinct, the monsoon climate is very strong and the waves are obvious. Most importantly, sea fog often appears here, so even if the bridge is completed, it will have a great impact on the traffic on the bridge.

In addition, building a bridge on the Bohai Bay will directly affect many cities on the Bohai Bay, such as Tianjin, Tangshan and Qinhuangdao. Most of these cities are mainly industrial, including steel machinery, resource smelting, shipbuilding and so on. They all need to rely on Bohai Bay for transportation. If the bridge is built, it will inevitably affect the passage of bulk carriers.

What's more, Bo is a semi-closed inland sea surrounded by industrial cities on three sides, and the seawater has been polluted a lot. If another cross-sea bridge is built, the ecological environment of the Bohai Sea will be even worse. However, the most serious problem facing the Bohai Sea is not the construction of the bridge, but another problem. Let's look down

Can you believe it? One day, the Bohai Sea may disappear completely.

In recent years, it has been found that the area of Bohai Sea seems to be shrinking year by year. As the northernmost coastal area of China, it consists of Liaodong Bay, Bohai Bay, Laizhou Bay, Central Basin and Bohai Strait. The coastline is 3800 kilometers long and the average depth is only 18 meters.

However, there are more than 40 rivers in the Bohai Sea, which belong to the three major water systems: Liaohe River, Haihe River and Yellow River, and a large amount of sediment rushes in from the Yellow Sea every year.

Because of this, the topography of Liaodong Bay, Bohai Bay and Laizhou Bay is inclined to the Bohai Strait, and the seabed of the Bohai Sea is basically silt and soft mud.

Coupled with the development of cities around the coastline, the coastline has expanded a lot, but the statement that the Bohai Sea will disappear in a short time is not credible.

Although the Yellow River injected about 6543.8+600 million tons of sediment into the Bohai Sea every year before the 1990s, it was impossible to turn the Bohai Sea into a plain overnight.

Then, based on the topography of Bohai Bay, it seems that the construction of the cross-sea bridge has basically been ruined, but people have come up with another way, that is, the cross-harbour tunnel.

This scheme was put forward as early as 1992, but it was not implemented at that time due to geographical conditions and technical limitations. With the development of science and technology in China, this plan is gradually put on the agenda. By 20 19, the plan has been successfully incorporated into national and local plans.

Although it is very difficult and the cost will not be less, the value brought by the completion is also very considerable. I believe that China, as a "infrastructure madman", will soon make this passage to Haiti debut.