An overflow dam is a dam whose top can release floods, also known as a rolling dam.
Overflow dams are generally made of concrete or mortared stones... However, in the current era, there is no reinforced concrete, but this does not prevent the people of Shanhai from using their wisdom.
If technology is not enough, witchcraft will come in handy.
Incomplete materials, support from all directions.
As long as the tribal people unite, any bird material can be obtained for you.
The workers in the mines worked hard to deliver the needed stones to the Great Flood Control City.
"This is our new method. To build a huge flood control project, it is not enough to use original earth and stone, or even rammed earth, triple earth, stone and wood embedded in the city!"
"What we have to face is the water of the river, not the residual flood. And Dazai told us the firing method of Sanhetu, and we got inspiration from it, and then we came up with something..."
As the wizard of the Yaoshan clan narrated, he gave up the right to make a grand introduction to Yu Zai, and Yu Zai obliged.
Add a wooden bucket to the iron pot, add glutinous rice and water, and simmer the glutinous rice into juice over a slow fire. Stir it with a rake at any time to prevent it from stagnating. Then use a ladle to test the consistency. Use a spoon to measure the consistency of the juice. Take it out and store it. Reserve in a clay jar.
Mixing glutinous rice juice with lime slurry is called counter slurry.
Then dissolve the lime with water to dissolve it evenly and remove impurities, then add the thick glutinous rice juice into it and mix well.
"Illustrations of River Utensils": For each forty kilograms of mortar, use two stones of glutinous rice and four liang of alum.
"This is glutinous rice slurry."
Ruanzai walked to one of the piles of earthen jars nearby. There were people working nearby, and inside was the so-called lime mortar.
This is the most luxurious adhesive in ancient times, and its strength is no less than that of modern concrete. Unless it is building some huge and important project, this kind of thing will not be used at all.
"The prerequisite for using this thing is rice production, which means there must be a lot of surplus grain."
Yu Zai looked at everyone: "Food is always the basis of everything."
"The river overflow dam is the first line of defense against major floods. Although there is still one-third of the flood diversion area in front of it, it is still the main force affected by floods."
"And it is also the key to serving as the first flood discharge. With it, all subsequent water conservancy facilities can be linked."
Therefore, the material cost cannot be saved at all.
Grain must be used on the blade. As for why cement is not made, first of all, it is limited by manpower and the scale of firing, and the firing of cement requires a higher temperature. Currently, only Akakata Blacksmith has such conditions.
Secondly, there are issues with strength and technical level. For example, in ancient times it was best to use volcanic ash and lime when firing cement. However, there are no volcanoes in the south, so cinders must be used instead.
It just so happens that the fire temperature of coal is higher than that of charcoal.
However, roads are impassable and transportation is inconvenient. Even if coal is transported from the Biyi Wilderness, the amount and time required are completely disproportionate, unless there is a giant clan to help transport it.
The reason why cement turns into a hard lump after adding water and can reliably bind sand, gravel, and steel bars together is because hydrated calcium silicate provides the required strength.
The calcium hydroxide produced is actually due to its congenital osteoporosis, which can easily lead to concrete leakage, penetration, and cracking...
Therefore, the firing technology still needs to wait for a while, which does not mean that the firing will be successful.
Although the threshold for some technical barriers is very low, as the saying goes, it is difficult for a clever woman to make a meal without straw.
But Yu Zai believes that it won’t take long. Now the blacksmith shop is divided, the tools are given to A Hong, the ceramics are given to Xiong Tao, the lathes are given to Xi Zhong, the gunpowder is given to Gu Pan, civilian and combat equipment, etc., are given to Gu Liang Wait for a bunch of friends to divide it up.
Yijun can concentrate on studying things like primitive chemistry.
In ancient Roman times, the original materials used in concrete were clay, gypsum, and lime. Volcanic ash.
In the Lingjiatan ruins in ancient China, there were also concrete-like operations of digging trenches and filling them with burned earth, and supporting mud walls with wooden bones. This technology is still used in the country of the Chengjiu clan, and the wizards of the Yaoshan clan also quickly adopted this technology. Technology is applied to the large flood control city.
Although it is impossible to have steel bars now, it is entirely possible to use cement as the outer layer of protection for the Shicheng Dam.
And the problem of coal must be solved. Not to mention the growth of the ceramic industry, the smelting of cement, ironware and other items, coal will become a very important thing in the future.
This is why Yu Zai must open up the thirty-six wilderness areas, including the seven wilderness areas in the Land of Shangliang.
Everyone accepted the overflow dam, and there was a huge slope in the distance. It was an area specially raised to alleviate the flood. It was a large earth embankment divided into three parts, namely, the strand embankment (which restrained the river channel) and the grid embankment (which restrained the river channel). The square area behind the Ludi) and Yaodi (the earth and stone embankment far away from the river) are still under construction, and the Hongshui Monument stands here.
Standing on the flood wall of the flood control city, the wizard of the Yaoshan clan specifically mentioned the issue of the foundation.
The collapse of Chongbo's dyke started from the foundation...
"Please take a look, Da Zai!"
The wizard of the Yaoshan clan explained the structure of the overflow dam to everyone one by one, and from time to time he let Yuzai express his opinions. The cement and glutinous rice lime mortar mentioned in it were naturally the focus of his instructions to Yijun.
Yijun's expression was crazy.
Danzhu was very unhappy.
When I need someone, I am Xiao Honghong, and when I don’t, I am Dong Factory Owner.
What a spectacle, this thing is much more powerful than Chongyong Fortress!
This is a "wonder". Specifically speaking, the Great Flood Control City is a complex of buildings consisting of an overflow dam plus numerous flood blocking facilities, dams, and canals. Because it looks like a city from a distance, it is called the "Flood Control City". ".
"However, the overflow dam has only been built in two areas, with a total of fifteen drainage holes. Only seven of them have been completed now..."
"After the overflow dam, there are three giant canals (spillways), and then there are nine water gates (culvert gates). The reason why there are nine gates is because the emperor came out of Tanggu and divided nine rivers..."
"However, the three giant canals are still under construction, as is the big slope. These are the second and third projects. The nine water gates are the fourth project. It may take a lot longer. Only one giant gate has been repaired so far."
That's right!
Yuzai whispered!
It’s all a tribute to his mother!
It’s just for good luck!
But having said that, asking the Emperor to protect this dam is like worshiping Confucius in the 21st century Chinese Language Examination, or worshiping Zhang Tang in the Law Examination. Although they are professional counterparts,...
Don't you see, before the exam, I paid homage to Confucius. The old master ate apples and nibbled senbei, and by the way, he smoked some Chinese seeds.
Wen Ming followed everyone, and Chong Bo gave them additional explanations on the side. Wen Ming's hands were shaking with excitement and he could no longer hold the board.
Being able to participate in the construction of water conservancy projects of this level is...this!
From now on, if you go out to submit your resume and look for a job, don’t hang your nostrils on your forehead!
The qigong masters nearby, acting as special advisers, murmured to each other. According to Liang, he was an honest man and shouted that he could not understand.
"The nine water gates are where floods are directed away. When the water level of the river does not rise, canals can be built to divert water..."
"This way, there will be plenty of water available in the south at any time."
Chongbo explained to Wen Ming, and he was very pleased to see Wen Ming drooling!
This kid looks like me! Where can women have fun with water conservancy projects!
"Tuo, Sui, open Watergate No. 1!"
Shu Jun was demonstrating from a distance, and Tuo Hesui had already called many people to use a huge winch to open the first gate of the nine water gates!
Behind the water gate is the water network from the fifth to the fifteenth stage!
These water networks are composed of countless guide canals and control canals, as well as various water conservancy facilities, to transport the water to the areas where they should go!
Although now, it is just a wasteland!
The giant gate rumbled, making a shocking sound, and as the gate was opened, in Wen Ming's eyes, there was a new era of flood control that was coming!
