The second team of the road construction team that built the road came from news that the road was about to be completed, and all the preparations for the construction of the iron bridge were completed. At this time, Yang Heng had to put down his work and go to the bridge construction site to command.

Some people may ask, just building an iron bridge, does it take so long to prepare? By the way, it takes a long time to prepare, not only material preparation, but also technical preparation is also needed. Originally, Yang Heng preferred stone arch bridges, but after careful consideration, he rejected this idea. Stone arch bridges, especially very long stone arch bridges, require precise calculations, strict construction, and take a long time, especially as such ornamental bridges, which are not very suitable for load-bearing, so Yang Heng rejected this proposal.

As an iron bridge, there is no need for such strict calculations. In short, the iron bridge that Yang Heng wants to build now is purely a bridge made of steel. Why do it this way? It saves brainpower. In the future, if you have a calculation expert, you can simplify it. Now Yang Heng mainly wants to build a stupid, big, black and thick bridge.

How was the preparation for this bridge prepared? In advance, Yang Heng asked someone to dig another river on the periphery. Now that the gunpowder has been put in place, he will explode the undigged river embankment at Yang Heng's order, so that the river water will be diverted. On the main river, Yang Heng prepared enough manpower and enough sandbags.

"Mr. Lang, you're ready. Do you see if you want to ignite the fire?" "Impulse." Yang Heng ordered, several servants quickly ignited the fuse sealed with wax with fire skewers. Why do you need wax? It's mainly for waterproofing, and for security, each gunpowder point is fired at the same time. In other words, there are three fuses, no matter if you can get one, it can play a role. This is the water inlet and water outlet.

"Boom," two loud noises. Then there was the sound of the water flowing. "Langjun, the river embankment has exploded. Should the gate be the main channel now?" Xinsheng asked forward again.

"Gate." This is a relatively stable riverbed, and the route Yang Heng chose to divide the river was a section with a drop, so the river surface dropped a lot after a while, and the water flow in the main river channel became even smoother. It was just for the gate of the river. Hundreds of people quickly threw it into the river with sandbags on their backs. A day later, the river channel gate was up.

This is a river channel that is more than 50 meters wide. For the convenience of sailing in the future, Yang Heng specially built a guide bridge of dozens of meters. In this way, the bridge will be nearly 100 meters long, but not all sections of the road are built with iron. Yang Heng directly stocks up the guide bridge at both ends. This does not waste much iron, but the money is not wasted. Why? It is because the iron production is low. If there are too many, the guide bridges will look more neat. But now it seems that there are two cement piers at both ends, which hinder the feeling.

I don't think so much. Everything is mainly practical.

Everything was running step by step. Although Yang Heng was on the scene, there was not much to ask him, because he had already trained the bridge repair personnel in advance.

"Langjun. Why are you not afraid of rotten by using wood to drive piles below?" Xinsheng raised a question that everyone is concerned about.

Yes, Yang Heng used some wood as the bottom piles of some bridge piers. Where did he learn this? It turned out that this was what Yang Heng saw from the Internet in his previous life. Even Yang Heng had seen many collapsed bridges. What are the benefits of using wood as piles? As long as these woods are not exposed to the water surface, they will not rot, and they will even be stronger than some cement-poured piles. Of course, if the foundation is really found, it is better to pour it out, but the foundation is so easy to find. Although the water above is locked, there is still a lot of water seepage below. This is why Yang Heng used wooden piles. Moreover, as long as the pile is used with enough strength, most of them will be inserted directly to the bottom, and then they will start pouring cement on dozens of wood, and a shelf to tie steel bars. If it weren't for the purpose of making the cement solid, the workers would want to pour the piers at one time.

While the workers were pouring the piers, some workers were cutting angle steel and drilling holes. In other words, Yang Heng used angle steel rivet-style construction method for this bridge, which is why the preparation time was long. In the building materials factory and the steel branch, Yang Heng specially made a furnace specialize in producing materials for bridges. In this way, materials were also needed to make the bridge without delaying life, which made the preparation time a little too long.

"Mr. Concubine, are you busy?" "Li Shaofu, why are you here when you have time?" It turned out that Li Shaofu heard that Yang Heng was on the construction site of the bridge and he came to visit the set.

"Mr. Concubine, I want to report to you about the situation in our county after you left." "Haha, I am no longer in his position, so I don't care about it. But I heard that you did a good job and continue to maintain it. When this county is upgraded, you can't escape from the sixth rank." What about reporting work? He was just an inquiry about Yang Heng's tone. It's not bad. Yang Heng was very satisfied with him. If he could not guarantee his level increase, then Yang Heng would be really incompetent.

And the county magistrate was regretting it at this time. Why, there were many things, but he couldn't do anything. "Ming Gong, the tax collection this summer has been raised. Do you want to go and have a look?" "Please go into the warehouse, I won't go." Yes, he couldn't go anymore, and it would be useless to go there. He couldn't find any sand content that he could not find in the range. Within the range, what, it's not qualified. If you say a standard, you don't have a standard, so you can follow the standards of the court.

In the training of the government soldiers, if you want to nominate the candidate for the brigade coach, you must first live for more than five years, and the top students in the past have achieved success. It is not so bad, so it will be cooler and squatted.

In short, since Yang Heng left, the new county magistrate has been unhappy in everything. Who should he ask for to complain? This proves that you are incompetent.

Similarly, for the chief clerk, he can't do anything bad. Why does the supervisor have an account, and his account is actually dispensable, but if there is anything wrong with his account, he will immediately catch the handle. Also, others remember the account, but he can't understand it, but he remembers the account, and if there is a mistake, he will catch it, but it makes him depressed. He doesn't know that whether it is the warehouse responsible or the supervisor, it is a new accounting method taught by Yang Heng.

County Magistrate Li left happily, and Yang Heng put his mind on the bridge. At this time, a tall shelf had been set up on the riverbed. People riveted corner iron on it, and for every riveting period, someone cleared the rust on it and applied anti-rust primer. While painting, people were still preparing wooden boards, waiting for the pavement with cement steel bars to be laid on it. In addition, on the lower floor, a special floor was specially prepared for the maintenance of the station people. That is to say, once the bridge is completed, a dedicated person will maintain the bridge within a fixed time.

The bridge was prepared for a long time, but it was built for a short time. It was very fast. After half a month, the bridge passed quickly. It was not a miracle. Yang Heng used a lot of people, almost reaching a foot of one person. It was not fast enough, so how could it be fast?

"Brother, why do you use a thin wooden board to separate every other section of the road?" After the bridge was built, the baby and others also came to the scene. Such a spectacular scene naturally made them feel it.

"This, think about it. Do you need to heat up some bearings when installing some bearings?" "Ah, I understand, this is thermal expansion and contraction. If you use the wooden board, the heat expansion and contraction will not cause the thermal expansion and contraction to break down, or the shrinkage will break down." The baby said loudly, why did he shout loudly? This proves that she knew something again.

It's true that Yang Heng had no cutting machine, so he could only use thin wooden boards to separate the road in advance. People who built roads in their previous lives repaired the road first, and then cut them with a cutting machine.
Chapter completed!