The leisure time of the first month always passes quickly.

In the blink of an eye, the dragon raised its head on the second day of the second month, and the people began to work in the fields. Guan Yu brought back tens of thousands of elite soldiers who had been trained in Nanzhong, and they were also involved in the emergency repair of water conservancy.

The heavy labor work such as building cities and rivers has always been the highest "city dam" of labor punishment. If Qin Shihuang was put at that time, they were all prisoners, escaped slaves, son-in-law, and merchants in Mount Li.

These soldiers under Guan Yu were all elite soldiers who had been practicing for two years and had been fighting for years. They must be very unwilling to do so, so they must be treated and strengthened in their work, and then equipped them with exquisite tools and equipment.

Liu Bei personally inquired about the food of the troops and promised to provide soldiers with meat meals every three days. There was rabbit meat in February, and there were some chicken, silkworm pupae, and a small amount of pork from March.

In order to provide this part of the meat, the government recruited the silkworm pupae left after silk reeling, as well as a small amount of chicken, duck and live poultry from silkworms around the Chengdu Plain.

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The reason is also very sufficient: these people can get such large-scale sericulture benefits because the government organized the construction of water conservancy projects and hydraulic silk reeling workshops, which has stimulated the demand for the upstream industrial chain. Now the government wants to further develop water conservancy. Shouldn’t these people who get rich first by taking advantage of the benefits of the upstream industrial chain?

So the people in Du'an, Pi County and Chengdu did not resist. The additional tax standard is that every family with five mulberry gardens has to pay a chicken every six months (the feeding cycle of native chickens is less than half a year), and every season of ten baskets of ripe silkworm pupae are required to pay a weight of about four to five kilograms of cherry trees every year.

There are nearly 10 million mu of mulberry gardens around Chengdu, with a total of 4 million chickens and 20 million kilograms of silkworm pupae all year round.

When it comes to every soldier in Xiuhe, there are 40 chickens per person and 200 kilograms of silkworm pupae per year. You can eat one chicken for about ten days, and you will have half a kilogram of silkworm pupae every day. If you save some food, you can also marinate the chickens added to the expedition and use them as military rations for the Northern Expedition next year.

In addition to the excellent logistics support for military rations, Guan Yu's army also has complete tools for river building, and the supply of excellent iron tools is very sufficient. The shovels and shovels are sufficient. Only tools such as hammers that do not require edges can be made of stones or other heavy objects, and they do not necessarily need to be refined iron.

After listening to Li Su's suggestion, Liu Bei opened all the iron tools and machinery in the warehouse of Chengdu, because he also heard that Li Su would build a large-scale peat and gas well iron craft workshop in Jade Road and Zigong this year. Within a few years, the steel output in Shu can be increased several times, so there is nothing to be stingy about the existing iron tools stock. If you want to do a good job, you must first sharpen your tools.

What improves efficiency more than iron tools is the further large-scale application of gunpowder in engineering.

Before starting construction, Li Su also carefully explored the mountainous landscape of Leshan in Nan'an County. As long as Leshan cuts out a diversion corner on the south bank of the Dadu River estuary, the biggest trouble is not the long distance, but the mountain is too high.

If you follow the traditional construction and slowly excavate the stones from the top of the mountain and walk down, it will be too much of a waste. Because there is no need to break all the upper part of the mountain before transporting it away, it is a total waste.

The best way is to dig a little crack in the mountain, then use the gun hole to bury the medicine and explode, so that the large mountain bodies can collapse directly.

To speak human words that laymen can understand, we try our best to ensure safety while artificial landslides.

Anyone who has seen landslides in the quarry in later generations knows that a few meters deep under the cliff of the mountain explodes the cracks. The mountain above itself will not be able to withstand the structural weight and be crushed by its own weight. If you don’t learn to use the self-weight of the mountain, then Li Su’s physics class in his previous life will be gone.

However, this job is too dangerous, and Li Su didn't want to use his elite soldiers to do it, so he suggested that Guan Yu capture some old men from Yueli County next door - they were all tribes that were the most ruthless and not very convinced when Guan Yu wiped out the barbarian king Gao Yi last year.

These people were originally labeled as "Gaoyi's best friend" and were punished as slaves. Moreover, Yueli County and Jianwei County were already bordered by the Dadu River. The dangerous work of creating landslides was done by these barbarian slaves in Daliang Mountain.

In mid-February, Li Su personally supervised the first landslide operation on the front line of Leshan. After several uncertain front blasts, the planned excavation point at the foot of the mountain had been dug into the interior of the mountain for four or five meters deep and seven or eight meters wide, and more than one person was over. More than a hundred old prisoners of war slaves still waved shovels and shovels, hollowed out all the debris and gravels that had been blown out of the trough, and then continued to dig holes in the stone with steel chisels, filling them in the black gunpowder, which had been improved for several years and had gradually increased its blasting power.

Li Su himself estimated that the blasting effect of the black gunpowder at his hand had increased from the weak point of "approximately the power of gunpowder in the Northern Song Dynasty" when he first entered Shu to the level of "approximately the gunpowder in the middle of the Ming Dynasty".

However, this time the slaves did not seem to have completed the landfill operation. They had just dug three or four holes, stuffed gunpowder, and continued to dig more holes, carefully observed the sentinels of the mountain with crystal polished fire in the distance, and found that there were blocks of soil falling on the mountain. This seemed to be a precursor to the repeated training before construction reminding them to be warned of.

The sentry immediately warned, and then the soldiers in charge of ringing the gold ringing bell to withdraw the troops. The others didn't care about landfills anymore and hurriedly ran back.

Unfortunately, after waiting for a while, there were no landslides except for some soil blocks and a few trees that were not deep rooted. The troops had to order a few slaves who had originally ordered the heaviest punishment of "snail tattooing city pounding" to take the leads and stuff them one by one into the cave where the holes had just been drilled and loaded but had not had time to set up the detonation device, and then ran far to detonate.

(Note: "Stand Tattoo City Dan Mong" is a life-long labor punishment evolved from "Stand Tattoo City Dan Mong". During the repeal of corporal punishment during the Han Dynasty, the abolition of corporal punishment did not abolish "Tattoo", that is, tattooing on the face. Until the Song Dynasty, there were tattooing punishments, but the cutting of toes and noses were changed into sticks. Until the end of the Han Dynasty, there were first punishments for sticks, and then tattooing on the face for life.)

After this blast, the originally trembling landslide was finally collapsed. Several huge rocks, several meters long, thick and weighing millions of kilograms, fell directly from the cliffs twenty or thirty meters high, and broke into gravels less than one sq. The number of each piece was reduced to the order of 10,000 kilograms, and could be dragged away by the soldiers.

The military judge also immediately announced on the spot that the prisoners who had been stolen who had been stolen the last ones who had taken the risk of getting a cannon were pardoned by one of his wives and children in their family, but these blasters themselves had to continue to take risks in the army - because the wands and children were punished by one of their wives and children as slaves, and pardoning the slaves of one family was also a good reward.

The reason why I am not directly pardoned is that every person with successful blasting experience is a valuable skilled worker. If I am pardoned directly, it means that I have to train a novice from zero practical experience, and maybe there will be more casualties and losses in construction.

Therefore, when selecting training targets, the officials always pick the children of wealthy barbarians with more relatives in the breach of the crime, so that they can have enough relatives as motivation to make them work hard to pardon. If these people are really lucky, they will successfully blast the mountain dozens of times, and dozens of relatives who have committed crimes and become slaves in the family have been pardoned as civilians, and they are not dead yet, so they have to pardon themselves, give them wages, and then change to newbies to blast. This credit is still something to say.

Because the project has just started, senior generals also visited the scene in person. After Guan Yu saw it, he couldn't help but sigh at Li Su: "This time, I'm afraid that a total of millions of kilograms of mountain rocks had collapsed. If the soldiers dig down from the top of the mountain, I don't know how much labor would be spent. Fortunately, the gunpowder method you thought was so mature, could it be that it was where you practiced before?"

Li Su smiled proudly when she heard this: "It's also considered that after two years of engineering experience. It was the autumn of the previous year. When I opened the fire salt well in Zigong, I used blasting to dig deep in the project for the first time. There were too many landslides and the well walls were not flat, but it was indeed dug deeper and faster.

Later a few months ago, I asked Xiaozhi to take some people to secretly learn the salt well blasting method in Zigong, and improve it. I dug an old landslide at the diversion of the Western Han River Valley between Hechi County and Sanguan County. He did a good job there. He had no time to go to farm in winter, and had already dug more than half of the old dam dam that blocked the north flow of the Western Han River."

The project mentioned by Li Su has actually been working on it one after another since he accepted the application of Fazheng and established Sanguan County. However, it is not that urgent. It is the slack season every year, and the civil servants from Sanguan and Hechi have been mobilized for several months. When Dong Yue and Fan Chou entered Chencang Road last year, in order to cover up the Han army's small actions, Li Su also asked Fazheng to disguise himself and eliminate the flaws on the construction site, which delayed a lot of time.

The winter of 192 and 193 was the stage of full-scale construction, and it reached the point where gunpowder blasted and loosened the soil.

In recent years, Li Su also sent people to carefully survey, including using simple earth methods to measure the altitude of the Chencang Road and the turning points of the Western Han Dynasty. It confirmed that the Western Han Dynasty water diverted caused by the "Wudu Earthquake in the second year of Empress Lu" more than 300 years ago did not have the overall uplift of the mountain, but only the "lands collapse" blocked the estuary of the Western Han River flowing north. Therefore, Li Su hoped that "let the Western Han Dynasty water flow north again and flow to the city of Chencang" could be completely done.

Because if the mountain crust plate rises directly due to an earthquake, it will be completely out of the blue. If you want to dig a rising crust plate several meters lower, then unless you dig the entire mountainous area of ​​more than 100 miles in the northern section of Chencang Road, the project volume is too large and there are still hard mountain rocks below.

But if the landslide is collapsed, it means that the old path is still lower than the turning point of the Western Han Dynasty. Even if it gradually accumulates later, it is all things that are easy to dig out like soil. As long as the big stones at the landslide are washed away, the river will be changed back.

These are all later stories, and Guan Yu didn't know it, but he heard Li Su say that his blasting technology was used in other projects to create landslides and excavate landslides, and it was constantly improved and improved, so he felt more confident.

It seems that this Leshan Yan doesn't need to die many people to be repaired. All that is left is to pile up money and manpower as planned.

The only thing Guan Yu is worried about at the moment is that the iron tools are damaged too much due to excavation of the mountain. The shovels and shovels in Chengdu's warehouses were almost scrapped in less than half a year at the current wear rate.

Li Su was also optimistic about this concern: "Isn't the smokeless peat ironmaking workshop on the other side of the road under construction? I will go back to Chengdu in March to preside over the tax reform of the rent and mediocre tax regulation. Before the end of February, I will go to the road to see it to ensure that the large-scale steelmaking will be smooth and will never delay the ironware demand here.

More gunpowder workshops will be built on the other side of the road, because there is still a lot of earth and nitrogen in the minerals transported from Nanzhong, and there is no shortage of charcoal and sulfur needed to make gunpowder. The most scarce is that there is soil and nitrogen supply in the south. In the future, our army's steel gunpowder distribution center can be built around the road.

The Shu brocade in Chengdu, the salt and iron gunpowder from Zigong and Wudao, and the raw patent leather transported from Nanzhong will be missing in Shuzhong in the future."

——
Chapter completed!