Back in Yangzi Town, it only took a short three quarters of an hour from disembarkation to boarding Wang Qi, and without changing his clothes, he occupied the training ship and sailed away, heading straight to Guazhou Town as mentioned in the plan.

Judging from his adoptive father's plan, it seems that it is not particularly difficult to build a bridge across the river, but he still does not believe that human beings can build bridges on the Yangtze River moat.

Guazhou Town, Yangzi Town is less than ten miles to the south. Calling it a town, in fact, is a wharf on the Yangtze River, and it is not accurate to say that it is on the Yangtze River, it should be called on the Yangtze River.

Guazhou is an island, similar to Chongming Island in later generations, which is formed by silting up the sediment washed down by the Yangtze River, very close to the north shore and a little far from the south shore.

Don't look at it as just a small sandbar with a big fart, but its geographical location is very critical, just guarding the mouth of the canal, and the opposite side is Jingkou Town, which has built a city on it since the Tang Dynasty, and there are sailors stationed, which is a water fortress.

The river is relatively narrow and the current is not fast, making it the best place to sail from north to south, and there are many boats coming and going every day. On the west side of the town, there are many shops and a famous teahouse, which is a favorite place for many literati.

Wang Anshi once lingered here when he made the Yangzhou judgment, and enjoyed the river scenery while enjoying the poetry: Jingkou Guazhou is a water, and Zhongshan is only separated by a few mountains. The spring breeze and the south bank of the Green River, when will the bright moon shine on me.

As for what makes a small sandbar and a river exciting, Hong Tao, a person who is accustomed to seeing the scenery of the world by taking advantage of the convenient transportation conditions of later generations, will definitely not understand, but he can understand the importance of Guazhou Island to the construction of the bridge across the river.

Later, Hongtao came here, but it is a pity that the vicissitudes of the sea, nature has become a powerful bulldozer, Guazhou Island has disappeared, and it has been re-submerged by the river, and it has been replaced by another larger sandbar, Shiye Zhou.

In the local museum, it is said that Shiyezhou was only fully revealed in the Ming Dynasty, and Hong Tao felt that this statement was more reliable. Because in the late Northern Song Dynasty, it was indeed not fully revealed, only the small lotus showed sharp corners, and a small head emerged in the middle of the river.

There is also a broken wooden boat lying on it, it is said that someone who is not familiar with the waterways here and is in a hurry to travel at night, but as a result, it rushed headlong on the sandbar and ran aground, and no matter how much it was dragged, it could not be towed. Later generations simply hung oil lamps on the mast of the ship as a lighthouse to remind passing ships to pay attention to avoidance.

The sharp corner of the bridge is the most important thing, and after it, the Yangtze River here is no longer a moat more than four miles wide, and it is suddenly shortened to a span of less than two miles.

If there is a way to build one or two piers in the river, the hard bridge will not be built, but it is not impossible to connect three or four Hutuo River chain bridges together, at least theoretically feasible.

"Daddy's move requires a huge amount of money, food, and manpower to spend ten times more than the Hutuo River Chain Bridge!" Wang Qi walked for two whole days before coming back, and turned the south and north banks of the Zhenjiang section of Guazhou dozens of times, although he no longer said that it was impossible, but there was no joy on his face.

According to the plan drawn on the drawings, it is indeed possible to build this bridge, but the cost is too high and the difficulty is too high. Even when he had tens of thousands of engineers in his hands, Wang Qi didn't dare to pack tickets, and now, he didn't dare to do so.

"Money and food are not a problem, and manpower is not a problem, these fathers will find a way." Unlike Wang Qi, Hong Tao seems to be more enthusiastic about building this bridge, and his spirit is very high.

“…… There are still two places where the child is not sure. Seeing that his adoptive father wanted to build a bridge like this, Wang Qi would not be the top, and he would not be able to move on the top.

To tell the truth, he wants to build a bridge that can go down in history, the Hutuo River chain bridge is ingenious, but it is not enough to make the world remember, the bridge across the river is more suitable.

But reason told him that this thing was not very reliable, and it cost a lot of money, not to mention that it involved a lot, and it was really not something that could be said by the two Huai River Repair Systems. On the other side of the river is Liangzhejiang Road, and people have to say whether they cooperate or not.

Even if the adoptive father could persuade the emperor to cooperate with the officials of the Liangzhejiang Road, what was the purpose of spending so much effort to build the bridge? With the money to repair the bridge, dozens of ferries can be set up along the river, equipped with hundreds of ferries, and the efficiency of transporting people and goods is definitely higher than that of a bridge.

"According to Daddy's drawings, this bridge should be divided into two parts: the north bridge and the south bridge, the north bridge has three piers, and the south bridge has four. The child surveyed on the spot, and although the river was no more than two feet deep, the bottom of the water was so thick that it was impossible to pour the foundation. ”

Wang Qi really didn't deliberately find an excuse to shirk, otherwise he wouldn't have wandered around the boat for two days before coming back. There are indeed many technical problems found, and if the two biggest ones cannot be solved, the adoptive father will not be able to build this bridge even if he kneels on the ground and kowtows to himself.

"Dam the river!"

“…… The North and South waterways are released in turn? ”

......The first technical difficulty was solved in just four words, and Wang Qi gasped when he heard it. I've seen a loser, but I've never seen a loser father who worked so hard, and in order to build a few bridge piers, he had to build a dam to block the river.

It's technically possible, but it's a huge amount of work. However, it also highlights the unique vision of his adoptive father, who made full use of the small sandbar in the center of the river, and if it did not divide the Yangtze River into two channels, north and south, the amount of work would have to be doubled.

"Once the bridge is completed, the bridge deck will not be more than two feet from the nearest part of the river, and the larger sailboats will not be able to pass, how can you explain?" Wang Qi accepted the construction plan of the bridge pier, and then asked a second problem that seemed more difficult to solve in his opinion.

In order to increase the overall height of the bridge deck, all the piers had to be heightened. Heightening the pier also means that the proportion is thickened, and the calculation will be known to raise the bridge deck to the extent that all sailboats can be navigable, and the bridge pier must be more than ten zhang high, and the diameter is larger than that of Kaifeng Fantai.

This is equivalent to building five huge towers in the Yangtze River, and it is a bit too embarrassing to resist the erosion of the river every moment and maintain it for a hundred years.

"You also built the Wusheling Fortress, don't stick to traditional methods when designing the construction plan, and be flexible. Who stipulates that the bridge deck must be higher than the mast to cross the ship, there is also a flat bridge in Kaifeng City, and the ship needs to lower the mast to avoid the bridge deck when passing. On the other hand, can the bridge deck actively avoid the mast? ”

Don't look at the fact that in terms of civil engineering technology, Hong Tao is more than ten streets worse than Wang Qi, but he often has a flash of inspiration in solving technical problems. This kind of ability is useless by accumulation of experience alone, it is all based on knowledge.

Hong Tao has seen almost all the bridge models in later generations, even if he has not experienced it, there are TVs and computers available. In the face of Wang Qi's question, there is no need to think about it at all, just rummage through the memory.

As soon as you turn the page, anyone who has been to London has definitely seen Tower Bridge, which was built on the busy Thames River and has problems with boat access.

The British made a 70-meter-wide split suspension bridge between the two piers, and when there was no boat, it was the bridge deck, which could pass through cars and horses, and if a boat came, the bridge deck would not affect the navigation of the ship if it was lifted in a figure of eight. Very clever design, I think the British will not have an opinion on using it myself.

"No wonder the two piers in the middle of the river are so close to each other, and the child thinks that his father has drawn the wrong ......" blushed and admitted his mistake with adoring eyes. Wang Qi can't afford to talk to his adoptive father about whether the bridge should be built anymore, and he still hasn't been a teacher, so let's study hard.

The design of the suspension bridge is imaginative, and it is by no means extraordinary. This simple structure is common in most city gates, but no one thought it could be used on large bridges.

In this way, the Hongqiao in Kaifeng City is a design error, in order to allow ships to pass through the bridge deck into an arch, the result is to increase the difficulty of vehicles and pedestrians to cross the bridge.

"It's also very likely that you will make a mistake as a father, so don't make too much of a big deal about this matter, and you need to find Lord Shen to carefully scrutinize it. The construction is not urgent, first do the preliminary preparations, prepare the lime kiln, stone mining and material yard, and then step by step, not fast but safe. ”

In the face of his son's compliment, Hong Tao smiled, and then understated his modesty and modesty, so as to make his image more tall, who doesn't like to listen to heartfelt praise.

“…… The child has one more thing to mention, Jiangnan is under the jurisdiction of Liangzhejiang Road, does Daddy have to say hello in advance? ”

In fact, Hong Tao's actions are useless, in Wang Qi's eyes, he already needs to look up and the dragon can't see the end, it doesn't matter if it's 10,000 meters or 50,000 meters high, it's all invisible.