Why not build a cross-sea passage between Yantai, Shandong and Dalian? The following two points or the key

If you want to drive from Dalian to Yantai, or from Yantai back to Dalian, you need to drive at least more than 1,000 kilometers, and you have to pass 10 expressways in the middle, which means that you have to pay more than 600 yuan for the toll, not counting the fuel cost. , Why is it so far between Yantai and Dalian?

In fact, the straight-line distance between the two places is only more than 100 kilometers, and it takes 1 hour to arrive by plane, but if you want to drive by yourself, you have to detour more than 1,000 kilometers, because the Bohai Sea is separated between the two places, which is very inconvenient. Since Dalian and Yantai are separated by the Bohai Sea, why not build a sea-crossing bridge between the two places? Wouldn't it be much more convenient.

The cross-sea bridge promotes exchanges between the two places.

Dalian is known as the "Pearl of the North" of the three eastern provinces and belongs to Liaoning Province. It is a tourist destination with pleasant scenery and mild climate. It is also a key port city in China.

In addition, its geographical location is very special. For example, the north of Dalian is connected to the old industrial base of Northeast China, and the east of Dalian is the economic and trade circle of Japan and South Korea. Therefore, Dalian has an important strategic position, but Dalian also has a drawback, that is, It is blocked by the Bohai Sea to the south, causing it to be far away from Central China.

On the other hand, Yantai, an important prefecture-level city in Shandong, is connected to the Shanghai-Nanjing-Hangzhou Economic Belt to the south and is an important port city in the Bohai Rim region. The north is also due to the Bohai Sea, which cuts off communication with the Northeast.

But it just so happens that the two important economic cities are separated by the Bohai Strait, blocking the economic development of the two places and even the Northeast and Central China. Therefore, how to connect the two places and promote economic exchanges is very important, and it is obvious that a bridge should be built. Ah, otherwise I would be sorry for the title of China's "infrastructure madman".

If a cross-sea bridge is really built, it will be able to connect the two places, which will not only make use of the economic development of the two places, but also promote the economic development of Central China and Northeast China, which is of great significance.

It stands to reason that the state should be very active in the construction of sea-crossing bridges, but why has never heard of the construction of a sea-crossing bridge between Yantai and Dalian?

A sea-crossing bridge between the two places is unrealistic.

First, high investment. The straight-line distance between Dalian and Yantai is about 150 kilometers. At present, the longest sea-crossing bridge in the world is not half of the distance between them. Take the famous Hong Kong-Zhuhai-Macao Bridge in China as an example. The Macau Bridge, according to incomplete statistics, cost a total of about 100 billion yuan and took more than 9 years to complete. The sea-crossing bridge to be built between Yantai and Dalian is about three times that of the Hong Kong-Zhuhai-Macao Bridge. It can be found that the investment is really too big, and the longer the distance, the more difficult it is to build the bridge.

Second, the geographical location is not good. The bottom of the sea area of ​​the Bohai Bay has trenches and fault layers, which are located in the earthquake zone. If you really want to build a sea-crossing bridge, if there is a submarine earthquake one day, the high-investment bridge will be destroyed. Said, more importantly, it is too dangerous. There is also a more important point. This sea area is a breeding area for natural seafood, and the species of marine products are extremely rich. If a cross-sea bridge is to be built, it is bound to start construction in this sea area, which will definitely cause certain damage to the local marine ecosystem. influences.

Third, the weather is bad. Dalian and Yantai are connected to the Bohai Strait, and the Bohai Strait has a temperate monsoon climate, resulting in constant waves all year round, and several typhoons occur every year. In addition to being located in the north, there will be blizzards in winter, not only The construction is difficult, and the safety of the construction workers cannot be guaranteed. Even if the construction is successful, it is very dangerous to drive on the bridge whenever a tsunami or typhoon occurs, and the safety is not guaranteed.

In addition, Dalian and Yantai are not only coastal cities, but also trade development zones. There are a lot of ships transporting between the two places, and most of them are ships of great size and quality. If a cross-sea bridge is built between the two places, When these boats drive under the bridge, it is very dangerous. It is no joke that the big boat accidentally hit the bridge.

No matter how you look at it, building a sea-crossing bridge between Yantai and Dalian is an inappropriate business, and the key construction is still very difficult. Therefore, if Dalian and Yantai have to be connected, the country will be more willing to build an undersea tunnel. .

Undersea tunnel construction is difficult.

The construction of this submarine tunnel has actually attracted much attention. It was reported before that the state intends to build a submarine tunnel between Dalian and Yantai. According to the plan, the length of this submarine tunnel should be between 104-114 kilometers. It will be twice as long as the Seikan Tunnel in Japan, which is currently the longest in the world.

But year after year, there is no news of preparation for construction. Why? In the final analysis, it is still difficult, and it faces almost the same problem as the construction of the cross-sea bridge.

First of all, the subsea tunnel between Dalian and Yantai is more than 100 kilometers long. It is estimated that 260 billion yuan will be invested, which is too high. Considering all aspects, if you want to recover the cost, it is conservatively estimated that it will take 100 years.

Secondly, there is the problem of affecting the ecological environment. Although the impact of the submarine tunnel on the submarine ecological environment is smaller than that of the sea-crossing bridge, this does not mean that there is no impact. However, according to the current domestic and foreign research, it will still have many impacts on the marine ecology, such as geological exploration. At times, explosives need to be used, which will more or less cause the death of seabed creatures and cause pollution to the seabed environment to varying degrees.

Finally, the submarine tunnel built by Yantai and Dalian is located in the Tanlu earthquake zone. It is not necessary to elaborate on how dangerous it will be. Although the tunnel is relatively resistant to earthquakes, it is still unable to withstand a major earthquake. The distance is not short, and various emergencies are not easy to grasp.