The projects launched at the same time were artillery and railway construction. In fact, when we first arrived in Danzhou, President Meng had already spent a lot of manpower on the road. The migrant workers found in Danzhou were mainly Koreans, and there were also many natives from Northeast China. More than half of the construction corps they formed were dedicated to building roads. The railway foundation from Benxi to Dandong had long been flattened, and the gravel and sleepers were all ready, just waiting to lay the railway tracks. ∫ Please read the book Wｗ∫Ｗ∮.

ＱingＫanＳhu．

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A few days later, the No. 1 blast furnace was finally completed and put into production, with a daily output of 130 tons of iron, a coke oven was put into production, and a daily output of 440 tons of coke.

This is very scary in this era.

The hard work of the cute president has not been in vain!

Benxi's front line is bombing every day, and the cute president is working hard in the rear. The start of the steel industry will mark a more stable defense in Danzhou. The bombing on Benxi's front line is also constantly testing the quality of Danzhou's steel, and many experimental shells have been taken to the front line.

War is indeed the best medicine to stimulate production and leap in technology.

The more than 30 industrial zones in Danzhou, the cute president, are concentrated near the port, forming an industrial zone group!

Slogans and posters were posted everywhere in the industrial zone groups, most of which were slogans such as selling their heads and blood to support the Patriotic War.

Or you can defend the leader and the motherland.

Whoever dares to hit us will kill me.

All walks of life are passionate, and the sound of bombing every day is the best stimulation to the factory.

The total length of the rail is about 25 meters, and the rail is not cheap and accounts for a very important part of the railway cost.

The rails used in Danzhou are cut into a "work" shape, divided into rail heads that come into contact with the wheels, the middle rail waist and the bottom rail bottom. Please read ∮ ∫ book Ｗｗ∮ＷΩ.

∮ＱingＫanＳhu．

cC

Different routes have different requirements for the strength, stability and wear resistance of the rail.

Therefore, the rails have different specifications.

Which one should be used on a route needs to be considered economic and technical factors.

The type and strength of the rail are expressed in kg/m. The heavier the rail per meter, the greater the weight it can bear.

Danzhou's rails imitate the United States and use 77 specifications.

The rails are made of high manganese steel.

Manganese steel has a very strange and interesting temper: if 2-3% manganese is added to the steel, the low manganese steel produced is as brittle as glass and breaks as soon as it is knocked.

However, if >13% manganese is added to make high manganese steel, it becomes both hard and tough.

Therefore, people use manganese steel to make wear-resistant machine parts, rails, bridges, etc.

In addition, another kind of metal indium is added to the upper part of the rail, that is, the layer in contact with the wheel. Its addition makes the upper part of the rail more tough while ensuring hardness. This is very important for the wheels of the train. When it comes into contact with the "wheel hoop", it will have a certain degree of elasticity, ensuring the safe operation of the train.

There are many ways to connect rails into rails.

The most traditional way is to fix the rails about twenty meters above the rails, and there are joints (also known as joints) between each rail.

It is a habit in the UK that the two rails will have joints in the same place, but the United States will place them in different places. Please read the book W ∫∫W ｗ Ω Ｗ Ω Ｗ Ω ．

∫ＱingＫanＳhu．

ΩcC

Americans helped Danzhou build railways, so many of the practices of Danzhou's railways are in line with the United States.

The cute CEO also has another consideration, which is to lay the foundation for connecting the Tsarist Russian railway in the future. When the railway is built, the cute CEO thought of this!

Although the capture of Tsarist Russia is huge and far away, the cute president has already made it a goal to capture Tsarist Russia in his subconscious, so in the early days of his establishment, he considered the matter of integrating Tsarist Russia.

The rail joint is joined by a fishtail plate. It is a steel plate about 60 cm long with four or six steel bolts at both ends to be used to buckle the small holes in the rail. There is a special gap between the rails, about 6mm wide, which is called a telescopic joint.

The small holes that allow steel bolts to pass through on the fishtail plate are oval, so that the rails can have room to expand in hot weather.

This is very important for rails: if there is no room for expansion, the rails will need to withstand 1.6 tons of pressure or tension whenever the temperature changes for a certain degree.

If the maximum and minimum temperature difference between a place is thirty degrees apart every year, this force can reach fifty tons.

A rail may become crooked and oblique, affecting driving safety.

Although this can solve the problem of cold and shrinkage and heat expansion, the small joints left on the rails make the train pass by "click, click" sound.

Unless the rails are well maintained, such jointed rails are not suitable for high trains to drive; passengers will also feel that the driving is not stable. Many countries that reach railways will still use this rail connection on low routes, and non-important routes or branch lines.

Fishtail boards are also common in the lack of modern investment routes.

Most routes in the United States belong to this category, and most of them use wooden sleepers (i.e. sleepers); in part, the reason is that the railway level in the United States is not high and the price of wood is also very low.

Another newer method of connecting rails is to continuously weld the track, also known as seamless tracks or long welded tracks. This method welds the rails several kilometers long into a continuous one. Since there is no joint, the strength of the rails increases, less maintenance is required, and the vehicle is driving smoother.

The cost of welding joint tracks is more expensive than using fishtail plates.

However, because of the high strength, the vehicle can drive at a higher height on the continuous welding track, and the friction is reduced.

To solve the problem that seamless tracks may be distorted when they shrink and heat, rails need to be tightly locked on the line, so that their freedom of expansion and contraction is limited.

The general method is to use concrete sleepers, buckle the rails with solid fasteners, and apply enough ballast below.

Each time the rails are replaced or laid, the rails are first stretched to expand and then locked on the sleepers.

In this way, even if the temperature increases in the future, the expansion of the rail will also decrease.

The temperature of the locked track is also very important. Generally, each track will refer to the local maximum and minimum temperatures, and then calculate the appropriate temperature. If the temperature in the future is based on the initial budget (such as a historical hot summer or cold winter), the seamless track may bend or break.

Using tracks that are constantly welded can still use joints where needed.

However, most of these joints are not crossed by a 90-degree straight line, but are connected at a very oblique angle. In this way, the vibration and noise of the wheels passing by will be greatly reduced, but the rails will still have room for expansion. This joint is called an adjustment switch.

Danzhou Station mainly handles some passenger and freight transportation tasks in Danzhou city and its jurisdiction.

At the same time, it is responsible for the important transportation task of exporting Danzhou goods to North Korea.

The total construction area of ​​Danzhou Station is 153oo square meters, and can accommodate more than 2,000 passengers at the same time. The station building has an entry and exit hall, a domestic waiting room on the first floor, a domestic waiting room on the second floor, an international waiting room on the second floor, a VIP room, a soft seat waiting room and a ticket hall.

Each waiting hall has a drinking water room for passengers and a bathroom, which is elegant, simple, comfortable and convenient.

Passengers can enter the platform directly or through the underground lane when traveling from the spacious waiting hall, through the ticket gate, and directly or through the underground lane. Passengers can check tickets directly or through the underground lane when leaving the station.

These were designed by Mrs. Catherine. In the past year, the young Mrs. Catherine, who had already had architectural knowledge, has constantly absorbed the experience of construction engineers from all over the world and has become the general manager of Danzhou's construction industry. National engineering is done by Mrs. Catherine, and the cute president also trusts Mrs. Catherine very much.

"It seems that no matter what I say, you can understand it, and the drawings drawn are the same as what I say." The cute CEO smiled faintly and looked at Mrs. Catherine. He had not talked to Mrs. Catherine for a long time.

The main reason is that the cute CEO is busy. Moreover, before his relationship with Princess Catrina Kaif became better and better, the cute CEO was like a little male dog who was suffocated all day long, thinking about eating women's tofu all day long. Now, thinking about it, sometimes I feel embarrassed, especially Mrs. Catherine. He once longed for Mrs. Catherine, but now I think about it, this is not immoral. While the cute CEO blamed himself, he had already given up this idea.

It depends on love and ritual. This is the traditional Chinese morality. The cute president is pretty good, so he sticks to it.
Chapter completed!