Prime Minister Bizen

Chapter 557
Togawa Tatsuya agreed too quickly, and didn't give Osafune Sadan a chance to argue. Seeing Togawa Tatsuya's acceptance of the matter now, and Hideka's smile on the sidelines, the face of Osafune Sadan The helpless look of falling up and down.

Fortunately, there are a few catties in my family, and the Mixiu family knows it well, so they said to Osafune Sadakin and Togawa Tatsuya, "Let Higo be in charge of the expansion project of the main castle on the west bank of Arakawa. , Sogo, Higashi Maru, and Hanaji Maru will not be constructed.

It has been 7 or 8 years since the construction of Osaka Castle. Isn’t the construction of Sannomaru still in progress? As long as you can complete the construction task of the main country within 5 years, I will be thankful.

Fortunately, my Iwafu Castle is a ladder-style castle, and each city wall is relatively independent from other city walls. It is not like the Lunkuo-style castle in Osaka City. It is necessary to tamp the land of the outermost city wall before starting to build it. Honmaru, the progress can be faster. "

After finishing speaking, he said to the frowning Osafune Sadaki, "I know what Misakushou is worried about, so let's suspend the Waimaru and Demaru, etc., and let Higo complete the construction of the main Guo building, and then further demonstrate the following building bar.

Even if the castle town has been built, when the time comes, pay them a sum of land money or ask them to change to a larger land on the periphery, and just demolish them to the periphery. "

Hearing Xiu's statement, even though he was still unwilling to start such a big project, he could only respond, "Since Your Highness already has an idea in mind, let's implement it."

Hideka nodded, looked at Togawa Tatsuan again and said, "Although it is a Lian Guo style castle, Honmaru and Okumaru are still the tallest in the city, followed by Ninomaru and Sannomaru. , the outer pill is the main part of Guo three times, the protruding part of the edges and corners is slightly next, and the end of the pill is released.

Even Izumaru has a stone wall height of 2.5 meters compared to the castle town streets.Therefore, when you build the main gate of Yanfu City, you must reserve the height difference in advance. "

The Japanese are short, with an average height of 1.3 to 1.4 meters. The height of the stone wall with a height of 2.5 meters is enough. After all, there are water holes below, which increases the difficulty of siege.

Only in this way, the height of the outgoing pill is 2.5 meters, the protruding part of the corners must be at least 4 meters, the main body of the outer pill is 6 meters, the height of the Sannomaru is 8 meters, the height of the Ninomaru is 10 meters, and the height of the main pill must be more than 12 meters.

This is only the height of the Ishigaki ground compared to the castle town.

Sounds high doesn't it?However, the stone wall of Osaka Castle Honmaru is 32 meters high from the root of the stone to the top layer of natural stones. After deducting the 6-meter depth of Mizuhori, it is also 26 meters high.

Part of the turret, only the part above Mizubori is as high as 30 meters, which is the stone wall that is 4 meters higher than the ground of the Honmaru.

The Iga Ueno Castle built by Fujido Takatora later has a height of 29.7 meters from the root stone to the Tiandan stone.

Facts have proved that the 12-meter-high Honmaru of the Lian Guo-style castle that Hideka now recognizes is too conservative, and his retainers are much bolder than him.

Finally, through the hands of Togawa Tatsuyasu, after the actual construction of Iwafujo Castle, the Honmaru Stone is 30 meters high, the depth of Mizuhori is 6 meters, and the height of Mizuhori is 24 meters!

Counting the heights of 13.5 meters and 16.3 meters of the two-story stone steps of the castle tower, and the 30 meters of the five-layer and six-tier tower, the height of the entire tower is 59 meters, which is naturally not as high as the exaggerated 77 meters of the Osaka tower. But if you count the height of the Honmaru Ishigaki, it is already 84 meters above the ground. (The height of Osaka Castle is more than 105 meters including the stone wall)
Outrageous?
It is not outrageous at all. The tallest stone wall in Japan in history is the Marugame Castle built by Ieji Yamazaki in the Sanuki country. The height of the stone wall reached a terrifying 60 meters! ! !
This is no longer the Marugame Castle that Hideka conquered during the Battle of Sanuki. You must know that Marugame Castle is also a flat mountain castle. Its rammed earth layer was built from scratch on flat ground, and the height of 60 meters is even It is the highest height of many Honmaru castle towers.

You must know that this was in the Warring States Period when labor productivity was low, and having a building more than 80 meters above the ground was already an extremely shocking thing.

The specific design plan for the construction of Iwatsuki Castle was determined, but the discussion on the construction process has not yet been completed. Hideo shot at the turret, and Ueno intervened in the construction process of the stone wall.

The most important issue is the craftsmanship of the stone wall. The entire city like Xiangxiu's is considered to be a city built in a swamp. Its foundation is easily soaked by the water in the water wall, causing the rammed earth inside to become soft.

And once the rammed earth becomes soft to a certain extent, it's fine if he doesn't make progress himself, and it's easy to pull the stone wall cut on it and collapse together.

Therefore, at this time, we need to use the artifacts in the construction of Jiangnan and Fujian - wooden piles.

Talking about it, Xiujia took out another drawing, which was a cross-sectional drawing of the stone wall. I saw that under the entire stone wall and the rammed earth, Xiujia inserted wooden piles at equal distances, and there was a horizontal line under the rammed earth layer. For the layout of the stakes, the vertical and horizontal stakes will be connected with dowels.

The entire wooden pile is embedded in the ground for more than 5 meters, and there is still 3 meters in the rammed earth. The horizontal wooden piles are 8 meters long to form the foundation on the entire rammed earth layer. These vertical piles and horizontal piles are exactly Yanfucheng. A solid secret.

The whole rammed earth layer is inserted into the wooden piles embedded in the ground, just like the ground piles inserted deep into the ground, to bear the weight of the entire building on the rammed earth.

The horizontal wooden piles near the water hole are more densely arranged, and they are arranged in a cross shape along the city pool without leaving any gaps. These horizontal wooden piles will bear the main weight of the stone wall. A section of vertical wooden piles embedded in the rammed earth layer is connected with the rammed earth. One side extends at least 3 meters into the Waterbori.

At that time, the extended part of Mizuhori and the entire main part of the stone wall will be built on these horizontal piles.

Since the stone wall is trapezoidal, it is necessary to add different lengths, and the stepped vertical piles are embedded in the ground to increase the tensile force in the horizontal direction.

And because they are embedded in the ground or close to the water source, in order to prevent the wood from being rotted, the pine wood must be used, because the pine wood has a high density and high hardness, and is not easy to be corroded in water.

It just so happens that the Xiu family's current fiefdom is very close to the Northeast and Ezo, and Ezo is the Xiu family's sphere of influence, and has a stable way to obtain pine wood.

If it was still in the original Bizen, the Xiu family would not dare to use such extravagant fortification techniques.

In the handover of Ishigaki, it is necessary to calculate wood volume to bear the force of the corners of Ishigaki.The so-called counting blocks is similar to the way we play stacking blocks, which is equivalent to stably conveying the force on both sides of the right angle to the footsteps.

These are just the common technical means in the construction of city walls and stone walls in the Edo period in history, but they are not mature yet, and what the Hide family will come up with next is the real big killer.

Hideka looked up at Osafune Sadakin and asked, "I think you have repaired all the pottery and masonry furnaces at Kofutai and Chiba?"

This is what the Hide family explained before they left Iwatsu. When Osafune Sada saw the Hide family asking, he said, "I don't know if I have set up workshops for making bricks and stones and pottery at Kofudai. I have set up workshops in Tochigi and Ueno in Shimono There is also a firing workshop in Tatebayashi.

And I don't know if it's brick and ceramic workshops, but the iron workshops in Shimoso Furukawa and Saitama Matsuyama have already started construction, and they can be basically completed before the arrival of Kibi craftsmen next year. "

Hearing Osafuna's report, Hideka nodded, took out the blueprints and instructions for making porcelain and cement from his bosom, and handed them to Osafuna Sadaon, saying, "Pottery and bricks don't have to wait for the artisans who make Bizen porcelain. , I also have the craft of making porcelain here. You choose some trustworthy Kanto potters and fire them in Guanlin, Tochigi and Kofutai first.

After the first kiln comes out, pick out the defective products and mix them according to my instructions above to make city cement, which will then be used in the construction of Iwafu City.

In order to increase the water release and strengthen the tension of the stone wall, I request that between the rammed earth and the stone wall, and between the stone wall and the stone wall, weave them together like a net, and then pour cement between the stone gaps, and wait for the cement to solidify. The rugged performance has improved a lot. "

After all, the Xiu family pretended to be mysterious and said to Osafune Sadakin, "When making cement, the craftsmen in each process must be staggered, and there must be no intersection. You must keep the cement formula strictly confidential."

Then he said to Togawa Tatsuan: "Tell the cement builder that this is a new wall paste, and the color may be different. After the wall is pasted, he will wait for 30 days. After that, he will take care of it like a stone. During this period, every Splash water on it on the 5th, but don't tell them it's cement."

Although the two had never seen cement, Xiujia's ideas and measures that surpassed the times had indeed led Yuxijia to progress. Therefore, when Xiujia asked for secrecy and the efficacy of cement, both of them believed in it.

The two agreed in unison: "Yu Ming"

After discussing the construction of Iwafu Castle, Hideka turned his attention to the renovation of Arakawa.

"Last time when I said I was leaving, I said that I would start preparations for the renovation project of the Shimoso, Musashi, and Saitama rivers, right? Has the plan come out? This time, the water and swamp will be drained and the ground piles will be laid again while the Iwafu Castle is being built. , tamping the land, expanding the area, etc., simply straighten up the river course of Arakawa."

The Arakawa at this time was not a tributary of the Tone River seen on the satellite maps of later generations. At this time, the Arakawa started from the deep mountains of Chichibu County, spanned the entire former Musashi territory, and flowed into Edo Bay through the east of Musashi. The mother river of Saitama and Musashi.

And because the current Arakawa is still a primitive river, the east and north of Musashi are not the core territory of the Hojo family, so the Arakawa has not been well rectified. In fact, the Arakawa was still flooding year after year until the Edo Shogunate, otherwise the Edo Shogunate would not Trying to divert the water flow of Arakawa.

At that time, it was the flooded Arakawa that brought sufficient sediment to the lower reaches of Edo, and the fertile Edo Plain was created under the impact of thousands of years.

"The plan has been made." Nasafune Sadakin took the map of the Kanto River Basin, unfolded it in front of Xiujia, and said, "The lower reaches of the Arakawa and Tone River will be dredged in the first three months of the year, the river channel will be expanded and the embankment will be raised, and the water flow will be increased. outflow space.

Starting in October after the autumn harvest next year, the project will gradually extend upwards. The renovation work of Tone River is expected to take 10 years, and the maintenance of Arakawa, Watarase River, Sumida River, and Ayase River will be completed. "

Watarase River is the Edo River of the later generations. It was originally just a part of the lower reaches of Watarase River. Real name.

Seeing that Xiu's family was looking at the river preparation plan for a long time but did not speak, Changchuan Zhenqin asked Xiu's family, "Is there any problem, Your Highness?"

Hideka was not satisfied with Nasafune's answer, and after thinking for a long time, he said, "Arakawa's problem is actually very big. The reason why the original Iwafujo Castle's water marshes were placed on such a large area has the function of flood discharge.

In case of a flood, part of the flood can be accommodated here, so as not to directly submerge Yanfu City.

But Iwazuki will be my main city from now on, and Arakawa will absolutely not allow the main city to be submerged.So I think that even the rectification of Tonegawa can be put on hold for a while, and Arakawa must start immediately. "

"In addition, I wonder if the Sumida River is too close to the middle and lower reaches of the Ayase River. There are four rivers in the east of Edo, Sumida River, Ayase River, Arakawa, and Watarase River. It will be flooded and cannot be effectively used at all.”

Changchuan Zhenqin was really frightened by his lord's unconstrained imagination, he tentatively asked the Xiu family: "Your Highness, do you want to?"

"I remember that the river on the edge of Kawagoe Castle is the Asama River. If you use part of the Asama River's channel, then open an artificial canal to bring the water of the Sumida River from the east of Edo Castle to Edo Bay.

Then divert the water of Ayase River to the existing Sumida River, and the upstream of Ayase River is not far from Arakawa. If the original river of Ayase River can be used to divert the flow of Arakawa upstream, the problem of flooding in Edo Bay will be eliminated. , the four rivers each perform their duties to feed the plain. "

The more Xiujia talked, the more excited he became, and he even directly accepted Zhuhong to draw the changed river course on the blueprint.In fact, this is a supplementary version of the Tokugawa shogunate's plan to change Arakawa in history.

In history, Tadashi Ina's plan to manage Arakawa and divert the Sumida River and Ayase River is not without boldness, but this plan was not implemented well.

It directly caused the Ayase River to be unable to withstand the water flow caused by the Arakawa River, and directly diverted to merge with the Sumida River, causing a larger-scale flood in the downstream, so that the Edo Shogunate had to ask for a second general request. 200 meters west of the New Arakawa River, A new Sumida River was artificially excavated, and the two rivers were artificially separated.

The Sumida River and the Ayase River were closer to Edo, which directly caused Edo to be flooded as soon as it met the flood discharge from the upper reaches. The river channels of Sumida River and Shinarakawa could not accommodate such a large flood peak, which directly caused large areas of farmland on both sides of the river to become flood discharge areas.

Correspondingly, the water flow of Motoarakawa was indeed greatly reduced, and eventually even dried up.

But later the Motoarakawa River found its own place, that is, it became a discharge tributary of the Tone River from the upper reaches, but such changes still make the current Arakawa River more than 8% narrower than before.

The original Arakawa was the most important main stream of Musashi, with a width of [-] meters at its widest point, but the current Motoarakawa is just a flood discharge tributary of the Tone River.

In Hideo's view, Ina Tadharu's biggest problem is that he miscalculated the water flow speed of Arakawa, and Hideo's plan is to directly excavate the canal manually, which will divert the Sumida River to the west of Edo Castle, and effectively relieve the flood pressure in the east of Edo Castle. Nurturing the area west of Edo where water resources are somewhat scarce.

The Ayase River can directly invade the Sumida River channel. The Sumida River is wider than the Ayase River, so there is no need to worry about flood discharge, and the original Ayase River directly becomes one of the flood discharge channels of Arakawa.

Looking at the blueprint given by the Xiu family, Changchuan Zhenqin is now one of the first and two big. The Xiu family's ideas are indeed a bit wild, but he does see the huge benefits in the future.

But the biggest problem lies in the artificial excavation of a canal west of Edo, which is estimated to exceed 80 miles from the drawings!
This matter may not be a big deal in the Ming Dynasty. Thousands of miles of grand canals have been dug, but this is Japan. Have you ever heard of a river that is more than 10 miles long, or the main road?
You can guess the manpower and money spent without careful calculation, and money is exactly what the Toyotomi family in Kanto lacks the most.

Nasakami raised her head and looked at the Xiu family with innocent eyes, um, the meaning was very clear, "Your idea is very good, but my family has no money now~!"

(End of this chapter)