After all, the Alexandria Lighthouse is also one of the seven wonders of the ancient world, so Li Su read history books in his previous life and at least he knew some relevant data.

So, he also knew that as long as he wanted to build a lighthouse according to Zhuge Liang's planning indicators on Yangshan Island, he could definitely grab the title of wonder of the highest building of mankind.

The total height of the tower in Egypt is about 135 meters, and the countertop height of the bonfire layer is 120 meters.

(Note: The top 15 meters is useless. The ruling class of the Ptolemaic dynasty comes from Greece and believes in Greek gods. Therefore, a bronze statue of the sea god Poseidon, more than ten meters high, was erected on the roof of the bonfire floor, praying for peace and safety.

There is no universal religious god worship in the Han civilization nowadays, and there is no sea god that sailors need to worship, so there is no need to set up statues of gods. Before Guanyin was introduced, Mazu did not start worshiping until the Song Dynasty. The prototype of Mazu was actually the daughter of a warlord in Zhangzhou and Quanzhou at the end of the Five Dynasties and Ten Kingdoms.)

During the Han Dynasty, the tallest building in the world should be the Great Pyramid of Giza, which was built by ancient Egypt thousands of years ago. That thing was more than ten meters taller than the Alexander Lighthouse.

Now, Zhuge Liang is not trying to grab wonders. He is purely aiming at objective geographical calculations. He thinks that the lighthouse in the Yangtze River Estuary of Yangshan Island must be built to more than 70 meters in height to meet the needs of use, that is, it is more than 165 meters.

This height will obviously maintain the record of the highest building on the earth for a long time. After all, according to the original history, the Giza Great Pyramids could maintain the world's highest record for more than 5,000 years until the completion of the Cologne Cathedral in Germany in 1880, setting the world record to 158 meters.

Now the Yangshan Island Lighthouse is more than 165 meters long, and even if the Cologne Cathedral is completed, it is not as tall as it is.

Of course, the 1880s was basically the time for the explosion of modern human construction engineering technology. In that decade, landmarks in developed countries around the world rose wildly. The record of Cologne Cathedral lasted for only nine years, and the world record was reduced to 320 meters by the French Eiffel Tower, which doubled directly.

Therefore, the world record of Li Su's wonder can last until at most the birth of all-metal steel structure towers (of course, the world's first steel tower may not be the Eiffel Tower).

Engineering technology can be solved, but the rest is the problem of resources and budget, which can be repaired if you have money.

In order to prevent opposition from being opposed by some traditional frugal officials in the court, Li Su considered it and prepared to write a letter to Liu Bei. In the future, this project will only be built with local resources, people's and financial resources from Yangzhou, and at most, a Guangling County, Xuzhou, on the north bank of the Yangtze River Estuary, will also benefit, and allow them to participate.

There were fewer counties participating and fewer resources, so the most part was that the construction was slower. The Ptolemaic dynasty gathered the efforts of Egyptian people to build a large lighthouse, and it was completely completed in forty years. Li Su's construction for five to ten years was not slow.

The specific way to raise is to combine shares in proportion. Kuaiji County and Wu County have a large position, while Danyang County and Guangling County can participate in a small amount. Future income and return will be solved by collecting tolls.

As long as every ship passing through the Yangtze River Estuary or this section of the East China Sea must pay tariffs and consolidate the port infrastructure usage fee, the cost of the lighthouse is also included in this toll.

At that time, all counties that hold shares will be divided into proportion from the Port Authority's fees and will feed back to the local finances. As the part of Kuaiji County is Li Su's fiefdom, the taxes will naturally be added to Li Su's independent treasury.

Li Su believes that the future industrial and commercial development of Dahan and the potential of "canal transport to the sea" will definitely be recovered by collecting tolls.

After the infrastructure and money were settled, only a few cautious officials were left, questioning Zhuge Liang's details of "setting a bell floor below the bonfire floor of the lighthouse."

On the one hand, many officials question whether such a huge copper bell can be cast. Even if it can be cast, will it waste too much copper? After all, copper can be directly minted. One million kilograms of copper is at least 100 to 200 million Wuzhu coins.

Even when Emperor Ling of Han was in power and was most luxurious, he created water in Xiyuan, Biguiyuan and other places, and each single item cost no more than ten million yuan, and the total amount was only so much.

Isn’t it too much to cast a big bell if Prime Minister Li directly spent so much copper material for the water supply and drainage system in the royal garden?

Regarding this issue, Li Su hopes to develop the copper mine on Luzon, the main island of the Philippines discovered by Zhou Yu in the future, so that the Han Dynasty can alleviate the shortage of money and make copper more abundant. What is it to use 100 million to cast a clock at that time?

Moreover, the clock is not necessary to be built with the lighthouse. You can leave space first and then use a step-by-step crane to lift it up in the future. The time will be relaxed and you will never use it too much.

As for casting technology, Li Su thought it could still be achieved that Yongle bell cast in the Ming Dynasty in history was about seventy or eighty tons, which was considered the largest bronze ware cast by ancient Chinese technology.

The Tsar Bell King created by the Russians in the 1700s weighed more than 210 tons, which was at least half a century before the start of the industrial song. In the end, it was still traditional Renaissance technology. Li Su made a little bit of it and created something more important than the Tsarist Bell King, and then grabbed a world record, and it was permanent, so there should be no big problem.

It’s so cost-effective to build one project and grab two wonders!

After these details were resolved, there was only one question that Zhou Yu personally raised:

Although there is no earthquake around the estuary of the Yangtze River in the East China Sea, high-rise towers are not easily damaged, but there are many typhoons. The towers are too high and are prone to unstable. They can only resist typhoons by causing solid things.

If a large bell is built under the bonfire floor, the big bell is hung and will easily be blown to shake during typhoons. Wouldn't it cause the tower to collapse more easily?

The reason why Zhou Yu mentioned this is obviously because he knew too much about the typhoons in the East China Sea. When he fought against Li Su five and a half years ago, he thought about using the typhoons in the summer and autumn to deal with Li Su's huge warships with high center of gravity, but in the end Zhou Yu failed.

But it is absolutely unambiguous to say that Zhou Yu is the navy general who is good at using wind. Since he has truly surrendered to the Han Dynasty and has specialized in his profession, he has to remind the Prime Minister.

This question really caught Zhuge Liang for a while, because his understanding of typhoons was indeed not as good as Zhou Yu, who was born in the Jianghuai River, which touched Zhuge Liang's blind spots.

However, when the east side was not bright, the west side was bright, and even Zhuge Liang was confused, Li Su, a liberal arts student whose physical computing power was no longer as good as his apprentice, had a flash of inspiration and realized that the problem raised by Zhou Yu did not seem to be a problem, but could prove the rationality of "hanging heavy objects high in the tower."

Who gave Li Su a rich basic knowledge of his later generations? Before he traveled through time, he had visited the Shanghai Stock Exchange many times, and only saw the Shanghai Stock Exchange Central Building in Lujiazui, including a group of three-piece skyscrapers known as "bottle opener, egg beater, and syringe".

In later super high-rise buildings in Shanghai, there is basically no need to worry about earthquakes, because it is not on the earthquake belt, but the typhoon prevention design must be very rigorous. In addition to the appearance design to reduce wind resistance, a unified operation is to hang dampers on the high-rise.

Li Su also visited before traveling through time. The damper in the central building of Shanghai is said to weigh 1,000 tons, and it is also suspended. The principle is not

"When the building is blown and shaken, the shaking of the damper will delay the speed of the building body shaking, causing the building to shake to the eastmost point. When it turns west, the damper is still shaking eastward by inertia, thereby offsetting the overall stress of the stairs going westward."

Now, Zhuge Liang hung a 200-ton copper bell on the third last floor on the top of the tower. As long as it is well designed, it can also act as a damper? Whenever it encounters a typhoon, the speed of the bell shaking lags behind the building, and the direction of the direction offsets, the lighthouse will not be tilted easily.

Of course, a lot of precise calculations are needed here, especially to calculate the resonant frequency of each part. The most perfect state is to achieve "the shaking of the clock and tower is just half a cycle, and the force is sufficiently offset."

Moreover, to ensure this, we must prevent the clock itself from being blown directly by a typhoon. Therefore, the four sides of the bell tower must be equipped with detachable fences to ensure that the clock is wrapped during typhoon days, or simply enclose the clock as much as possible, and design the amplification, leaving only the smallest hole to transmit the amplification.

The damping calculation, acoustic design... there are more physics to calculate.

Li Su could only tell Zhuge Liang about the concepts and thinking directions of existence. How to calculate the specific details can only be made by Zhuge Liang.

Even Li Su didn't know the specific values ​​of many physics constants to be used. Zhuge Liang had to do a series of comparative experiments to deduce these physics constants by himself.

It is said that after the lighthouse was built, Zhuge Liang added another historical title: he was the first scientist in the world to measure a series of damping motion coefficients.

This is not something Li Su can do.

In the last two months of winter of 203, Li Su spent this while conducting inspections between Kuaiji County.

After the location selection of the lighthouse and port is completed, the location selection of the shipyard must also be checked separately.

Considering that the shipyard does not need to be placed with the port, the shipyard must consider the transfer of wood. If placed on the island, a large amount of wood must be transferred to the island by large ships.

Therefore, in the end, the lighthouse was chosen in Yangshan, the port was chosen in the main island of Yongdong (Zhoushan) and Daishan, and the shipyard was chosen in the northern suburbs of Juzhang County, near the entrance of the Yongjiang River.

The port of this site can ensure sufficient deep water, but it is as close as possible to the land. The transportation and supply routes for daily necessities required by the port city can also shorten the mileage several times.

After all, Yangshan is at least 120 miles away from Lou County, but the main island of Yongdong is less than 50 miles away from Juzhang County, and according to the narrowest position of the strait, it is only more than ten miles.

Although this port on the islands outside the Yangtze River Estuary serves the shipping of the Yangtze River, the living supplies required for its port maintenance are not provided by cities at the Yangtze River Estuary, but by areas on the south bank of the Qiantang River.

The shipyard directly chose the site in Juzhang, obviously in order to directly discharge the wood harvested on Kuaiji Mountain and Tiantai Mountain along the Yongjiang River and transport it directly to the shipyard.

...

After completing the long-term transportation infrastructure planning, Li Su took advantage of the last time before the New Year to ask about the immigration matters he handed over to his staff.

After all, many internal affairs are promoted in parallel. While he is busy here, his subordinates dare not neglect them.

Since the autumn grain was put into the warehouse in September and the tax work was over, the people entered their winter leisure, and Qingzhou and Yanzhou have begun to organize immigration to set off south at the same time.

Your Majesty’s permission, who dares to delay the things assigned by the Prime Minister? Moreover, Li Su did a good job in the early mobilization, and he explained all the various considerations of the layout to the local officials.

Everyone unified their thinking, knew the benefits of immigration as soon as possible to the people involved, and also fully promoted the people:

First of all, if northerners want to immigrate south, they will definitely try to choose winter. This time window is very precious. If it delays, it will harm itself.

Because even though the land of Wu and Yue belongs to a habitable area for the Han people, with the medical and health conditions and population immunity and adaptability of the Han Dynasty, the poor people in Qilu migrated south for more than a thousand miles. When they arrived in Wu and Yue, they would more or less be disagreeable and some diseases would occur.

When traveling south in winter, the advantage is that it does not delay farm work and does not affect production. At the same time, it also takes advantage of the fear of heat in northerners. After arriving in the south, the winter is still relatively cold, so it can be used to adapt to multiple buffer periods of climate adaptation.

If I had arrived in the south for the first time in summer, many people might have died of plague caused by the heat.

Of course, there is also a difficulty in immigration in winter, that is, many people have to take away the harvest of the year, especially Qingzhou and Yanzhou are still in a tax-free period this year, and all grain harvests are theoretically owned by the people.

The local people have been suffering from high pressure for several years before. They finally had a better life in the first year. If they want to immigrate, they will definitely not be willing to throw away any bottles and jars, which puts great pressure on the government to transport.

After all, Liu Bei's court was quite kind. Organizing immigration must prepare ship capacity, and when he arrived at the local area, he had to fund the production materials to resume production. If the transportation losses were large, it would be very unprofitable.

Fortunately, during the handling of this matter, Li Su and his staff were quite flexible. They discussed with Zhuge Liang and came up with a way to use the financial credit and prestige accumulated by the court over the years to allow the local government to publicize and issue a "food stamp" printed on the Prime Minister's Mansion in immigration.

The format is similar to the citation bonds issued by the imperial court a few years ago, but the texture is worse. After all, the printing cost is controlled and ordinary mulberry and hemp paper is used.

The way to obtain food coupons is as follows: all people who want to immigrate can only carry about a month-long ration as food on the road, and all the remaining grains will be paid to Qingzhou and several local official warehouses responsible for military supplies in Yanzhou.

Zhuge Liang and Taishi Ci were responsible for collecting this grain. In the future, it will be used for the war expenses of sending troops from Qingzhou and Xuzhou Donghai County and crossing the sea to conquer Gongsun Du.

After the people received the food coupons, the Prime Minister's Office came forward to guarantee that as long as they arrived in Yangzhou, the local government would directly use the local rice to accept the food coupons in the hands of the immigrants at a discount of one to one, 5. The extra food earned was regarded as the government's additional subsidy support for the first year of immigration.

Therefore, anyone with a discerning eye can see that there is still a difference between this "food coupon" and "bills" and "bonds". It is more like a "bill of exchange" and a "passbook for depositing and withdrawing from other places" relying on the government's guarantee, allowing people to deposit and withdraw food in other places.

As for the high interest rate given, on the one hand, it is to subsidize immigration, and on the other hand, it is also because of "bills of exchange" that appeared in the world for the first time. In order to encourage everyone to participate, you should always give more sweetness.

Moreover, considering the loss of grain transport for thousands of miles and the expenses of additional transportation capacity, the government's actual expenditure did not increase after directly reaching the south.

After all, Yangzhou has been peaceful for five or six years, while Qingzhou and Yanzhou have only been peaceful for two years. The southern rice-farming area is also blessed with double-season rice, so Yangzhou's grain reserves are already abundant and the grain prices are still low. The government has no loss in doing so, but the people have made money in vain.

Unfortunately, in fact, because the illiteracy rate of ordinary people exceeds 90%, many people are illiterate and do not understand the imperial decrees, and do not believe in any new things.

Even though Li Su offered such preferential conditions, at least a half of the people insisted on carrying their own food on the whole journey of immigration, and did not trust the government's grain bills at all. After all, even in the 20th century, there was still rural elderly people who did not even trust money in the bank and had to bury them in their own cellars. There was nothing we could do about it.
Chapter completed!