The second road construction team that repaired the road came with the news that the road was about to be completed, and some of the preparations for the construction of the iron bridge had all been completed, at this time, Yang Heng had to put down what he was doing and go to the site of the bridge construction to command.

Some people may ask, is to build an iron bridge, do you need to prepare for such a long time, by the way, it is necessary to prepare for a long time, not only the preparation of materials, but even the preparation of technical techniques is also needed, originally Yang Heng was inclined to stone arch bridge, but after careful consideration, he vetoed this idea, stone arch bridge, especially a very long stone arch bridge, which requires precise calculations, strict construction, and the time will be very long, especially as this kind of ornamental bridge is not too suitable for load-bearing load, so, Yang Heng vetoed the proposal.

And 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 you do this, save brainpower, and then let them streamline it if you have a master of calculation in the future, now Yang Heng is mainly to make a stupid big black bridge.

How to prepare for this bridge, in advance, Yang Heng asked people to dig out another river in the periphery, and now that the gunpowder has been put away, just wait for Yang Heng to give an order, the embankment that has not been dug will be blown up, so that the river will be diverted, and on the main river, Yang Heng has prepared enough manpower and enough sandbags.

"Lang Jun, it's all ready, you see if it's on fire." "Ignition." Yang Heng gave an order, and several subordinates quickly lit the fuse sealed with wax with a fire fold, why do you use wax, mainly for waterproofing. And for the sake of insurance. Each powder point is fired with three arrows. That is, there are three fuses, no matter if you can reach one of them, you can play a role, which is the water inlet and the water outlet act together.

"Boom," there were two loud bangs, followed by the sound of the water, "Lang Jun, the river embankment has exploded." Whether to sluice the main river now. The new student stepped forward again.

"Gate." This is a relatively stable riverbed, and the route that Yang Heng chose to divide the river is to take a section with a drop, so after a while, the river level will drop a lot, and the water flow of the main river will be more gentle, just used to sluice the river, I saw hundreds of people carrying sandbags quickly thrown into the river, and a day later, the river gate was up.

It is a river channel that is more than 50 meters wide, for the convenience of future boats. Yang Heng also specially built an approach bridge of dozens of meters, so that. This bridge is nearly 100 meters long, but not all sections of the road are built with iron, the approach bridge at both ends, Yang Heng is directly hoarding stone and raising the approach bridge, this does not waste much iron, but the money is not less wasted, why, or because the output of iron is low, if more, this approach bridge is built with iron, it will appear more neat, but now it seems that there are two cement piers at each end, which hinders the senses.

I don't want to be so much, everything is mainly practical.

Everything is running according to plan, although Yang Heng is at the scene, there is not much to ask him, because in advance, he has already trained these bridge repair personnel.

"Lang Jun, why do you use wood to drive piles underneath, aren't you afraid of rotting?" The freshman raised a question that everyone was concerned about.

Yes, Yang Heng used some wood as the bottom pile of some bridge piers, where did he learn this, it turned out that this was Yang Heng from the Internet in his previous life, and even, Yang Heng has seen a lot of collapsed bridges, what is the benefit of using wood as a pile, as long as these woods do not show the water, then they will not rot, and even it will be stronger than some cement poured piles, naturally, if you really find the bottom, it is better to pour it, but this foundation is so easy to find, although the water above is blocked, But there is still a lot of seepage below, which is the reason why Yang Heng uses wooden piles, and as long as the wooden piles use enough force, most of them will be directly inserted to the end, and then dozens of pieces of wood will start to pour cement, as well as the shelves of steel bars, if it is not for the cement to be solid, the workers want to pour the pier at one time.

At the same time as the workers poured the bridge piers, there were also some workers who were cutting angle steel and drilling holes, that is to say, this bridge, Yang Heng was using the angle steel rivet construction method, which is why the preparation time was long, in the building materials factory, the steel division, Yang Heng specially let a furnace specialize in the production of materials for the bridge, so that without delaying the work, but also for the bridge to manufacture materials, which makes the preparation time a little too long.

"Horse, you're busy?" "Li Shaofu, why do you have time to come here." It turned out that Li Shaofu heard that Yang Heng was on the construction site of the bridge, and he came to visit the class.

"Pony, I want to report to you on the situation in our county after you are gone." "Hehe, I'm no longer in charge, so I don't care about it, but I heard that you did a good job, keep it up, and when this county is upgraded, you won't be able to run from the sixth grade." What kind of report, he just came to probe Yang Heng's tone, not bad, Yang Heng is very satisfied with him, if he can't guarantee his level up, then Yang Heng is really incompetent.

And that county order, at this time, is regretting the jump, why, obviously there are a lot of things, but nothing can be done, "Ming Gong, this summer's tax collection is up, do you want to go and see." "Stockpile, I'm not going." Yes, he can't go, and it's in vain to go, he can't find fault with the sand content at all, within the range, what, unqualified, you say a standard, you don't have a standard, then it's good to follow the standards of the imperial court.

Government soldier training, you want to nominate a candidate for brigade commander, yes, you have to have lived for more than five years, and the top people who have been trained in the past are not successful, so it's cool where to squat.

In short, since Yang Heng left, this new county order, everything is not going well, who is he going to complain to, complain, this proves that you are incompetent.

In the same way, for the master book, he can't do badly, why does the supervisor have an account, and his account is actually dispensable, but if there is anything wrong with his account, he will be immediately caught. There is also the fact that others remember the account, he can't understand it, but he remembers the account, and if there is a little mistake, he will be caught, but he is depressed, he doesn't know what to do, whether it is the person in charge of the warehouse or the person in charge, it is a new way of bookkeeping taught by Yang Heng.

Li Xiancheng left happily, and Yang Heng put his mind on the bridge again, and at this time, a high shelf had been erected on the riverbed, and people were riveted on it with angle iron, and every riveted section, someone immediately removed the rust on it, and painted the anti-rust primer and, while painting the paint, people were still preparing wooden planks, to be in the gap, waiting for the pavement to be paved with cement and steel bars, and even, in the lower layer, a layer was specially prepared for the maintenance of the station people. In other words, once the bridge is completed, there will be a special person to maintain the bridge within a fixed time.

The preparation time of this bridge is very long, but the construction time is very short, very soon, half a month later, the bridge will pass quickly, to say, this is not a miracle, Yang Heng uses a lot of people, almost to the point of one person and one foot, so it is not fast, how can it be fast.

"Big brother, why are you separating each section of the road with a thin plank" After the bridge was built, the baby and others also came to the scene, such a spectacular scene, naturally let them feel it.

"This, think about it, when the eldest brother installs some bearings, do you want to heat it up?" "Ah, I see, this is thermal expansion and cold contraction, and if you are separated from the wooden board, this road will not let the heat and cold shrinkage be damaged, or it will shrink." The baby said loudly, why should she be loud, this proves that she knows something again.

It's true, because Yang Heng didn't have a cutting machine, he could only separate the road with thin planks in advance, and the people who built the road in his previous life repaired the road first, and then used a cutting machine to cut a section. (To be continued......)