technical type

"The wood used is good..."

I don't know what the name of this kind of wood here is, but through the texture of the wood, as well as the curvature and tension felt when stepping on it, by extension, it can roughly explain why this kind of wood was chosen.

As for the structure between wood and wood, if it is completely the work of mortise and tenon, it will ignore the importance of design. If you want to say that the design is good, you have to test the professional knowledge of bridge building. Unfortunately, now, Ji Mo's professional knowledge is only five points, which is not enough to give a comprehensive answer.

How should the answer be in line with the age, and not so smart that the "monster" should be respected?

It's not that the senior brother taught him badly. In the last world, the fourth senior brother had tried his best to teach him. However, certain things, from different levels of knowledge, experience is also biased.

Just like a mathematician will split one plus one into a problem that requires reasoning and verification, middle school students have long disdain to explain why one plus one equals two.

What Ji Mo wants to learn and achieve may not be at the level of a mathematician, but it can't be lower than that of a middle school student.

Then, it is necessary to learn from a better master.

But the understanding during this period of time also made Ji Mo understand that Master Ji has many disciples, and the young and strong are the main force in building the bridge. You can guess some principles and draw inferences from one instance.

Compared with these main forces, Ji Mo is too young, short in stature, small in strength, and afraid of hitting his foot halfway if he wants to hold a brick. If such a weak person cannot make up for his shortcomings in intelligence, then, He will inevitably become a marginal figure among Master Ji's disciples.

And this critical period is the time when they first got along, when Master Ji valued him, and when they cultivated their relationship.

"...crossing each other, increasing the friction and occlusal force between each other..." Ji Mo tried hard to think about how to express it, and it was inevitable that he would inadvertently bring out some new words. It sounded very novel, and made his eyes more focused, with approval implied in his eyes.

"Master, is the reason why the bridge does not collapse due to the added load is that it can protect the bridge from rain, dry the wood and prevent mildew?"

Ji Mo selectively stated a reason he guessed, and he was confident that it was correct, because the addition of systematic knowledge points would never deceive him.

Master Ji nodded slightly. This is indeed one of the reasons, but the main reason is not this, but to stabilize the structure of the wooden arch bridge.

The pure wooden bridge is erected on the river, and there is a bottom-up force. If there is no other force to fight against it and strive for a balanced pressure, then the structure of the wooden arch bridge will be easily damaged. On the contrary, If there is a corridor house erected on the bridge, the arch structure can be compressed by increasing the weight of the bridge body, which can make the overall structure more stable.

When there is a flood, someone will move the stones at the head of the bridge to the bridge in order to increase the pressure so that the bridge will not be washed away by the flood.

Of course, another function of the corridor house is to prevent rain erosion, keep the wood dry, and prevent mold, which also has the benefit of prolonging the service life of the bridge.

Master Ji explained these words in simple and straightforward language. Ji Mo nodded from time to time, a little wanting to try, but unfortunately he didn't have chopsticks at hand, so he only gestured with his fingers, making some small movements.Master Ji laughed when he saw it, and Ji Mo laughed too.

[Main task: Bridge Builder. 】

[Current task: professional knowledge learning - (10/100)]

That night, both Ji Mo and Ge Gen lived in Master Ji's house. There were three rooms in total, one for their husband and wife, one for their two sons, and Ge Gen and Ji Mo lived in the remaining one.

This room was used by the standing disciples to come and stay. The Datong shop looked spacious and bright. Ge Gen found the place familiarly and unfolded the bedding.

When no one lives here, the quilts are piled up in a corner, and now it’s good to unfold the bedding, which is very convenient, but if no one lives here for a long time, it is inevitable that you will feel the sticky moisture , the bedding seems to be a little wet and cold.

The young man, with strong firepower, didn't care about these things, Ge Gen got into bed and fell asleep soon.

Ji Mo endured the somewhat inexplicable strange smell in the quilt, closed his eyes, thought and thought about all the recent things, and unconsciously fell asleep.

Master Ji can stay at home for a few days. In these few days, he will take them, mainly to take Ji Mo to see the bridge, walk back and forth on the bridge head, and look under the bridge. There are many people around They all knew Master Ji, and seeing him take care of apprentices so personally, some of them were watching from the sidelines.

Those who love to be funny will also tell Ji Mo with a smile about Master Ji's "great achievements". As villagers living nearby, they know the benefits of these bridges and roads best.

Ancient people didn't like to go out?

This is probably a modern misunderstanding of ancient times. Not to mention those celebrities who visited friends in the middle of the night and returned while they were happy, but ordinary people, there are a few who don't need to travel around for their livelihood.

Can farmers get enough food just by farming?Don't need something extra that you can't produce yourself?I am afraid that this is true during slash-and-burn farming, but with the court, the government, and unified taxation and corvee, it is still possible for girls to keep their nests, but it is absolutely impossible for men.

I can't finish the vegetables grown in the fields, do I need to exchange for something I want to eat?Every household in the same village has them. No one wants them, and they can’t exchange them. Do you need to go further and sell them in neighboring villages or towns?As for meat, there are still a small number of hunters in the village. The meat they can provide is often not sold in pieces, but sold whole to the butcher. The butcher buys?

There are also things for women’s households. It is obviously unrealistic to expect every family to weave and make clothes. Skills are scarce at any time, so you need to leave the house to buy them.

Ancient times are not as good as modern times. There are various sales platforms, and you can buy what you want without leaving home, and enjoy the service of door-to-door delivery.

People here, if they want to buy something, they have to walk a long way. Even the nearest market is not available every day. It takes a while, and those who are far away need to leave the house early. Go to the market.

These are still common. If there are unusual ones, such as daughters marrying far away, sons settling in other places, and coming and going, don’t they need to walk across the bridge to communicate?

Therefore, even the villagers who can't read the big characters still have a big box of chatterboxes waiting for them when they talk about the bridge and the road.

Ji Mo listened to these non-technical words and nodded from time to time. Master Ji seldom spoke to these villagers, and seemed a little indifferent, but just because he didn't interrupt the other party's interruption, he knew that he still treated these villagers. I miss you very much.

The ancients had a clearer concept of the township party than the modern ones. If there is something, the whole village will join the battle.

After the man finished speaking, Master Ji continued to ask Ji Mo what he thought after seeing the bridge.

"Great!"

Ji Mo didn't immediately talk about knowledge points. He is a layman when it comes to bridge building, but he is also different from ordinary laymen.

Whether he is a violin maker or a mechanism engineer, he is not too unfamiliar with wood-related skills, and he is familiar with how to choose good or bad wood. Even if the world is different, wood itself is not divided according to the world. Hardness, flexibility, elasticity, bending tension... Take out various indicators to measure, feel it with your hands, try to pinch it to see if it can leave a mark, tap it to listen to the sound, see if the texture is fine and judge the density... After the most basic and simple manual measurements, there is a general range and standard for the timber used in bridge construction.

Even if you don't know what kind of wood it is and what its name is, you still know what kind of similar wood you should choose if you want to imitate such a bridge.

Wood is also different from wood, and there is a comparison between the advantages and disadvantages of the same kind of wood. In this regard, wooden arch bridges are inevitably more picky.

"It's really not easy for Master to build such an arch bridge."

It was only after I personally engaged in technical work that I learned many things. What seemed simple actually contained great learning.

In terms of bridge building, in Ji Mo's view, it is an inevitable choice for science and engineering. The span, arc of the arch, and the horizontal thrust at the fulcrum are involved, and the pressure generated by the inner and outer pressure of the arch. The force between the intersection of arcs... Ji Mo's science is somewhat weak, and he doesn't know what to call this force, but the combination of these is like a physics problem mixed with a lot of calculations. What is the interaction between force and force? Yes, those who have not worked hard for this class can continue to smile.

It seems that there is no technical content, and it is enough to build wood piece by piece. If someone like Master Ji solves an equation, he may not be able to do it, but it is this simple splicing and construction that makes this seemingly ordinary wood. The arcade bridge stood for ten years without falling down.

How should we evaluate this "great cause"?

Ji Mo seems to have turned on the rainbow fart mode, constantly expressing an outsider's views on this matter, but the completely off-topic answer made Master Ji's ears feel hot.

"It's all made by the government..."

He may have never thought about it that much. He happened to know this skill, and the government asked him to build a bridge, so he built it. The location here was not selfish for his own convenience, but it was more suitable here.

Even if the villagers praised him a lot, he just listened politely. He really didn't take it seriously. He eats every day, and he doesn't think it's rare to eat. That's probably how he feels, but hearing Ji Mo's sincere praise , Looking at his upturned face, those eyes seemed to be shining brightly at himself, Master Ji avoided his gaze, coughed twice, and completely forgot what he was asking before.