Chapter 1125 Qitai Line Railway
If the Qitai Line Railway chooses a route with low construction difficulty, it will have to take a long detour, and the total length will be more than 600 kilometers.
Luo Chong's opinion is to go directly through the mountains, which can greatly shorten the journey, at least the total mileage can be controlled to within 450 kilometers, but this will greatly increase the difficulty of construction.
But if you want to say which route takes longer to build, it's really hard to say. After all, although the first plan is less difficult, the journey is longer.
You Fu was a little bit dissatisfied with Luo Chong's method at first, but after listening to Luo Chong's explanation and visiting the excavators and other engineering machinery of the Power Research Institute, he also thought that Luo Chong's plan was feasible, so this construction plan with higher technical difficulty was decided.
First, people were sent to survey the geology and select the most suitable route. Fortunately, the Han tribe already had a lot of experience in building railways, and they were familiar with it. The geological survey and mapping team quickly decided the route.
The planned Qitai Line is 460 kilometers long and is divided into four sections according to different regions and construction difficulties.
From north to south, the first section is Qi'an County, which is also the original location of the Baiwu tribe. From here, before going south into the mountains, the route from the plain to the mountains is 227 kilometers long. It is the easiest route in the entire project. It is basically the same as the plain route built before, but it is a gradually climbing section.
Considering the ability of trains to climb in the future, the surveying team has planned the most suitable gentle slope route to ensure that the train can climb up.
This second section is naturally the most difficult and dangerous section through the mountains.
After the surveying of the engineering team, and based on the difficulty of construction and the most economical considerations of construction cost, they planned a 98-kilometer section.
Although this section is not long, six tunnels have to be dug, with a total of 47 kilometers. These are all selected from places where the mountain is relatively weak and not prone to landslides.
In addition to these six tunnels, there are thirteen bridges, including two water bridges, six canyon bridges, and the rest are all land bridges.
The so-called water-crossing bridge is a bridge across the river, which is easier to understand; the other type of canyon bridge is specially used to cross the canyon, such as the terrain of the canyon between two cliffs.
The last type of land bridge is purely used to reduce the slope.
For example, if the slope of a certain section of the route is too large, which affects the train climbing or slowing down, then a bridge is built between the two points to reduce the slope of the route.
Among these thirteen bridges, the five land bridges have the largest number of kilometers. Although these bridges are the longest in total, they are also the easiest to build, because the bridges and bridge piers are originally on the ground, whether it is transporting materials or setting up scaffolding, it is very convenient.
As for the two water-crossing bridges, the difficulty is not too great. The current Han tribe has accumulated a lot of experience in bridge construction, especially this kind of water-crossing bridge. Moreover, the two water-crossing bridges on this section of the road are not large. One span is only 60 meters, and the other is no more than 200 meters. At most, a few bridge piers are erected in the water, and the bridge will be fine.
The most difficult to build are the six canyon bridges. This kind of terrain has cliffs below and cliffs on both sides. It is difficult to transport construction materials and it is impossible to erect bridge piers. Therefore, facing this kind of terrain, the engineering team uniformly adopts the arch bridge design, which is also the most suitable for this kind of terrain and the most familiar bridge structure for the Han tribe.
This third section of the road is from the mountain section of the second section, that is, the section from the mountain to Taigang County. The total length of this section is 73 kilometers.
From the overall point of view, this section of the route is also a slope, but the geological conditions are much better than the previous two sections, and it will not be too difficult to build.
The last 62 kilometers are specially divided into the fourth section of the route because the route of this section is more complicated. It is not that the terrain is complicated, but the route is more complicated.
In fact, from the third section, it can be regarded as the territory of Taigang County, but the entire Taigang County also has three counties under its jurisdiction, namely Pinggang County, Huangping County, and Jinshui County.
Huangping County is the northernmost of them. There is a series of mountains here, which are rich in pyrite. Because the mountains are yellow and it was once the northernmost barrier of the Tang tribe, it is called Huangping County.
This place is also the intersection of the third and fourth sections of the route. Continuing south from Huangping County, you will completely walk out of the mountains and enter the plains.
However, pyrite is iron sulfide, which can only be used to produce sulfuric acid, and iron oxide crystals, which are dyes and chemical materials, are not suitable for iron smelting.
The real main mining area of Taigang County is actually Pinggang County, the southernmost of the entire county, so the railway has to continue to go south.
Therefore, this fourth section of the road has to come out of Huangping County, go to Jinshui County, build a bridge across the Jinshui River, and finally arrive at the mining area of Pinggang County. The iron ore here is manganese iron ore, which is the most suitable material for smelting heavy-duty rails.
However, this is still not the end, because there are several secondary lines here on the fourth section of the route, such as the line leading to the county town of Taigang County. Another section of the road needs to be built to connect the railway from Taigang County to Panshi County, so that it can be connected with the Tangpan Line in the west, so that the train from Chengkang County can directly reach Tangcheng County opposite Takuhai County, which is equivalent to drawing a big circle.
This railway not only serves the mining industry, but also contributes to the economy and people's livelihood. Only by letting it pass through more counties can the economies of all counties along the line be driven. At the same time, it is also more conducive to maintaining the rule of the Han tribe over these places.
At this moment, the only road construction team of the Han tribe is now repairing the first section of the Qitai Line, which is the easiest section of the plain road to repair.
At this time, Youfu, with a group of craftsmen, is at the No. 1 tunnel of the second section of the project.
In addition to Youfu, there is also a team of more than 200 people gathered here, mainly composed of members of the geological survey and mapping team, and some are old people who once followed Youfu to explore everywhere.
Others were machinery factory workers and engineers who had just migrated from the north a while ago to help build the southern steel plant and coking plant.
However, the steel plant had not yet been built, so these technicians were brought to the tunnel construction site to guide the maintenance and use of various construction machinery.
In addition to personnel, other supplies were countless.
There were two tractors with buckets, one for coal and one for various tools, a rock drill converted from an excavator, and a loader for transporting gravel in the tunnel.
In addition, there were 300 horses, which were the means of transportation for all team members, and 20 four-wheeled carriages loaded with food, pots and bowls, and even 500 goats and antelopes, and a dozen sheepdogs to provide meat for the team.
There were plenty of grass and trees in the primitive mountains, so there was no need to worry about the sheep having nothing to eat. They only had to guard against attacks by wild beasts.
However, the team members who followed You Fu were also equipped with weapons. There were no muskets, but there were many longbows and crossbows. Most people also brought swords. Many of the tools carried by the team could also be used as weapons, so there was no problem with safety.
The team had been observing Tunnel No. 1 for two days. The engineers were still discussing the construction plan. When they received Luo Chong's order to split the railway construction team in half, You Fu did not say a word and immediately sent someone to deliver a letter to the road construction team behind. He himself found the head of the geological survey team, who was the engineer who decided the construction plan.
"Yang Xin, has the construction plan for the tunnel been finalized? The team has been in this desolate mountain for two days. When can we start work?!"
(End of this chapter)
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