How Zhan Tianyou s Beijing Zhangjiakou Railway used a herringbone line to climb uphill 15

The northbound train uses two locomotives when it arrives at the south exit, the locomotive in front pulls the back and pushes, and when it comes to the herringbone fork, it is equivalent to turning it upside down. Turn the train to the northwest, and you can see pulling it in your books.

Two locomotives, one locomotive pulls and one locomotive pushes. When it comes to the fork of the herringbone line, the locomotive that was originally pulled pushes and the locomotive that originally pushed pulls.

Zigzag, two locomotives at the zigzag corner** commutation.

On September 24, 1909, the Beijing-Zhangjiakou Railway was completed two years ahead of schedule, and the cost of the project was only 1.5 estimated by foreigners. The completion of this railway connected Beijing with the northwest, and broke the dream of Britain and Tsarist Russia to seize the right to build the railway. At the same time, it has also greatly increased China's confidence in building its own railways.

At the end of the Qing Dynasty, imperialism frantically fought for the right to build railways in China. The strategically important Beijing-Zhangjiakou Railway (Beijing-Zhangjiakou) was the target of fierce competition between Britain and Tsarist Russia. Britain and Russia each made threats to the Qing Dynasty:

If China can't build the Beijing-Zhangjiakou railway with its own money and engineers, it will have to be built by them. Under this pressure, in 1905 Zhan Tianbo undertook the task of building the Beijing-Zhangjiakou Railway, which was the first arduous project built by the Chinese with their own money and engineers. After accepting the task, he overcame all difficulties and achieved a lot.

In particular, he fought side by side with the workers and opened up the world-famous Badaling Tunnel with a length of 1,091 meters, which is even more praised.

Zhan Tianyou is an expert in railway engineering in China, graduated from Yale University in the United States, and from 1905 to 1909 he presided over the construction of China's first self-built railway, the Beijing-Zhangjiakou Railway. In the construction, the "human" herringbone line was used according to local conditions to reduce the number of projects, and the "shaft construction method" was used to excavate the tunnel.

The railway had to pass through many high mountains, and tunnels had to be excavated, among which the two tunnels of Juyongguan and Badaling were the most arduous. Juyongguan is a high mountain with thick rock formations, so Zhan Tianyou decided to adopt the method of chiseling from both ends to the middle at the same time. The spring at the top of the mountain seeped down, and the tunnel was full of mud.

There was no pumping machine on the construction site, so Zhan Tianyou took the lead in carrying a bucket to drain the water. He often lived and ate with the workers and did not leave the construction site. The Badaling Tunnel is more than 1,100 meters long, which is three times the length of the Juyongguan Tunnel.

He discussed with the old workers and decided to use the central sinking method: first dig a straight well from the top of the mountain, and then dig at both ends separately. In this way, several working faces were constructed at the same time, which shortened the construction period by half.

Tunnel) The railway passes near the Qinglong Bridge, and the slope is particularly large. How can a train climb such a steep slope? Zhan Tianyou followed the mountain and designed a "human" herringbone route.

When the northbound train arrives at the south exit, it uses two locomotives, one pulled in front and one pushed in the back. After crossing the Qinglong Bridge, the train goes northeast, and the fork of the "human" herringbone line is reversed, the locomotive that was originally pushed pulled, and the locomotive that was originally pulled pushed, so that the train turned to the northwest and moved forward. This makes it much easier for the train to go up the mountain.

Talking about Zhan Tianyou's design of the "human" herringbone line).

Difficulties encountered: obstruction by foreign countries, lack of technical personnel, arduous tunnel engineering, and large railway slopes;

He is not afraid of ridicule, not afraid of danger, difficulty, accurate survey of the line, the use of both ends at the same time to the middle of the chiseling, the use of the middle sinking method, the first soldier to rush to work, the design of the "human" herringbone line.

Experience Zhan Tianyou's intelligence, bravery, perseverance and patriotism.

Landlord, I'm here to tell you a wise quote that I invented.

A textbook to solve all the problems invincible", go to your textbook to get the answer.

The ridicule of imperialism is faced bravely.