During this period of time, the mine has not rested and is mining all the time.

Although the iron ore around the sanctuary is not rich, the quantity is definitely quite large. If Ankai is not mistaken, the iron ore here should have a lot to do with the iron ore on Herto's side, maybe this is it. A huge vein, but near Herto is the richest place in the whole vein, and then it continues to extend around. When it reaches the shelter, it has already reached the edge of the vein near the tail, so the reserves are much lower. .

But even so, the shelter cannot be mined in a short time.

During this period of time, I have been mining day and night, and then smelting, unknowingly, thousands of iron ingots have been saved.

An Kai had previously calculated the number of iron ingots that might be needed at one time. In fact, he was wrong at that time, and even the type of rails was wrong.

What he used to calculate at the time was steel rails, and sleepers were also made of steel. Steelmaking itself requires iron as raw material, and smelting a steel ingot, even more iron ore than smelting an iron ingot, so in the end Calculating a very large number, he felt a little scary at the time.

Later, after discovering my mistake, I recalculated it again, and finally came up with a slightly reassuring figure.

Of course, railroad tracks can also be used. Although railroad tracks are certainly not as easy to use as steel rails, the advantage of railroad tracks is that they are low in cost, and Ankai prepares wood for components such as sleepers.

This is a very old-school material. The earliest sleepers are made of wood. Although they are also easily damaged, the advantage of low cost is real. There are many reasons for the replacement of steel rails in the later period. For example, smelting technology has progressed and steelmaking costs have been reduced. For example, it is more cost-effective to use steel sleepers in a comprehensive judgment. For example, steel sleepers are far more durable than wooden sleepers, and so on.

If it is a big country, a strong government, sufficient resources, and well-developed technology, then there is nothing wrong with doing so.

But as for shelters, small businesses, don’t do that. If this is done, if one fails, the development of the shelter will be affected. Although they will not be dragged down, it is far from the time for them to pursue quality.

Furthermore, in system manufacturing, as long as the skill level is high, all items are classified by grade.

For example, the wooden sleepers of the fifth grade are not necessarily worse than the steel sleepers of the first grade.

Therefore, after comprehensive consideration, Ankai decided to use railroad tracks and wooden sleepers.

With railroad tracks, an average of two units of iron ingots and two units of wood are required for one meter. The consumption of wood is not less than that of iron, but in general, it is already very cheap.

For one hundred kilometers, a total of 200,000 units of iron and 200,000 units of wood will be consumed, which is a big number.

Fortunately, some of the wood in the wild is that even if the ground is washed by nuclear bombs, it is mainly targeted at large cities. There are many trees around the small town of Bernard. Although they were also affected by the shock wave, the trees themselves were not broken or broken. It was uprooted, and even now, some trees are still alive. It's a pity that the temperature in nuclear winter is low and there is no sunshine, so these trees must not last long.

But anyway, as long as you go out and look for it, you will have some wood. If it is a big deal, you will just demolish the house. Anyway, the last living people in the town will also go to the shelter. The various wooden buildings over there are no longer useful, and they are all flattened. If it does, it won’t be a problem to get back thousands of units of wood.

In addition, besides the rails and sleepers, there are some other trivial parts, which also require materials.

For example, ballast is laid on the roadbed and under the sleepers to hide and protect the sleepers. According to the laying position, it can be divided into two layers, the upper layer is the top ballast, and the lower layer is the bottom ballast.

It has many specific functions. First, it bears the pressure from the sleeper and distributes this pressure evenly on the roadbed. The second is to fix the position of the sleepers to maintain the correct alignment and **** of the track. It can also remove rainwater around and below the sleepers, and prevent the soil of the roadbed from being soft and deformed due to dampness. Increase the elasticity of the track, so that the rail after being crushed by the train can quickly return to the original correct position and so on.

In order to ensure the safe operation of high-speed railways, improve the strength of roadbeds, and reduce the cleaning and maintenance of ballast, modern track engineering replaces ballast, sleepers and roadbeds with concrete foundations, which is called "slag-free track". It can reduce maintenance time, maintain good quality and driving safety.

The subway tunnel made by Ankai naturally has such a configuration. In fact, he can directly pave the ballast when constructing the tunnel. The reason why he did not do this is mainly because he is convenient for riding by himself If it is laid early, the ground in the tunnel will be uneven, so the rails must be laid together and moved by rail vehicles.

But at that time, the shelter didn't have so much iron, and the tracks could not be laid far. In order to save more, An Kai gave up the one-step construction.

There is also the railway connection equipment.

For example, railway spikes, track connecting parts, rail supports and fasteners, etc., although these things are also part of the railway, but they are not in the scope of the system to make railways, but need to be made and placed separately .

In fact, it is not troublesome. It is better to use the system directly to produce, but it is just one more process. Generally speaking, the problem is not big.

Anti-climbing equipment is not needed on An Kai's side, because these people are in the shelter, and he only needs to make protective devices near the platform. In addition, things like turnouts and lane changers are also useless—at least they are useless at the moment, because Ankai has no extra sub-bases to connect with the subway. Of course, if there is one in the future, it won't be too late.

As for the means of transportation after the subway is laid, he is not ready to make the locomotives and carriages for the time being, because the number of generator sets is not enough, and the electricity consumption of a subway train that uses electricity is not a joke.

Anyway, he only needs a temporary means of transportation, so he can choose a purely human double rocker, also called a rail car, which can be seen in old movies. Two people stand face to face, constantly pressing down a seesaw like a seesaw. The same device, and then a small car moving forward gradually. This tool is good, but it's too laborious, and one trip back and forth can be exhausting.

Therefore, Ankai finally chose a rail transport trolley, which can be single-track or double-track. Considering the balance, Ankai chose dual-track.

As long as the generator on the trolley is turned on to provide power, the trolley can move forward gradually. The speed is not fast, but it saves time, labor and materials, and the transportation capacity is not bad. It is most suitable for the current Ankai.

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