"It is better to buy than to build, and it is better to rent than to rent." , I don’t know if you have heard of this term. It can be said that China’s science and technology community has been doing this from the beginning. From the beginning, we can see that many devices are There are too few products imported from abroad and developed by ourselves.
As a result, the facts gave us a loud slap in the face. Because we lacked core technology, we suffered heavy losses and were sanctioned many times. This sanction of Huawei has already illustrated the consequences of China not having core technology.
Academician Ni Guangnan once said that technology cannot be obtained, begged or bought. You must have your own technology. Academician Ni Guangnan’s words make sense.
This is not the first time that we have been sanctioned and restricted by other countries. Even the imported goods are higher than the market price. Of course, this also makes us understand that we cannot buy real technology at all. If we cannot, we will be killed sooner or later.
This shield machine is the best example.
I believe that everyone is no stranger to TBMs, because there are more and more construction projects in China, and many people have seen projects such as caves and subway tunnel lines.
Nowadays, China's shield machines have completely broken through foreign technical barriers. They are also among the best in the world. China's shield machines are the best proof.
China and Nepal are going to build an extension of the Riji-Japan Railway, but building this railway has encountered the Himalayas.
The Himalayas are a big problem, because it is necessary to open up the Himalayas and build a tunnel that can allow trains to pass. This is still open to debate, but if this tunnel can be opened, then China-Nepal Railway will not be a problem .
How can we pass through the Himalayas? requires a huge shield.
If this happened in the past, China would definitely spend a lot of money to import some backward products from abroad, even ten times higher than the market price, and in order to prevent domestic technical personnel from intervening, they would also refuse.
Without core technology, this feeling is really uncomfortable, so we decided to develop our own shield machine.
To get through the Himalayas, it would require at least 4,300 tons, and our country just has it. This kind of shield machine made in China is Jinghua, which is the best shield machine in the world.
"Jinghua" is a 16-meter giant shield machine jointly developed by China Railway Construction Heavy Industry and China Railway 14th Bureau. Its maximum excavation diameter is 16.07 meters, the fuselage length is 150 meters, and the total weight is 4,300 tons. It is currently the largest in China. It is also the largest machine in the world.
"Jinghua" was officially put into production in Changsha, Hunan, mainly for the reconstruction of the East Sixth Ring Road in Beijing, and made a huge contribution in the construction of the East Sixth Ring Road.
In April, Jinghua Hao had appeared 59 meters underground in the East Sixth Ring Road West Line Tunnel. At this time, Jinghua Hao had completed 1,646 laps of work and was 22.7 meters away from the bottom of the central hub project. , 1646 laps of work were carried out.
The performance of the Jinghua is very good, and the red Peking Opera mask is also impressive. This has also made China the most advanced ship in the world.
It can be said that the "making is worse than buying" thing has been completely broken. The key is to master your own core technology.
Moreover, with this kind of shield machine, the Himalayas project on the China-Nepal Railway will be more convenient, and the construction of the China-Nepal Railway will also be more convenient.
As for whether the Himalayas should be crossed, everyone has different opinions. Do you think that after the Himalayas are pierced, what impact will it have on our country?
