"Zhang Ping has seen His Highness, Your Highness is this?" Zhang Ping saw that Zhao Dezhao, the king of Liang, also came to teach shipping, so he quickly got up from his seat, put down the brush, and stopped the work at hand, not knowing what His Royal Highness King Liang was doing here.

"Lao Zhang doesn't have to be like this, this king came here to see the dock designed by Lao Zhang."

"Your Highness, this is the dock artwork designed by the minister, please read it." After speaking, Zhang Ping took four artworks from the table and handed them to Zhao Dezhao.

Zhao Dezhao stared carefully at the drawings drawn by Zhang Ping, the first three seemed to be the split structure of the dock, and the last one was the overall structure of the dock, but Zhao Dezhao also slightly understood the meaning of Zhang Ping's pen. Zhang Ping has drawn the design drawings of the dock, according to Zhang Ping's vision, the dock is composed of three parts, the dock head, the dock door and the irrigation and drainage system.

It's just that he still has some places where he still asks to teach Zhang Ping of the dock, the originator of the world's dockyard.

"Lao Zhang, what is this place?" Zhao Dezhao pointed to that place, and then asked Zhang Pingdao.

Following the place pointed by Zhao Dezhao, Zhang Ping suddenly understood, and said: "Your Highness, this is the dock door, and this one by one is the wood that blocks the dock door, which is used to block the flow of water." ”

"With wood? Isn't there cement now, and it's also troublesome to disassemble the wood. ”

"If Your Highness finds it troublesome, what's wrong?" Zhang Ping heard His Royal Highness King Liang talk about this problem, and he felt a little gloomy in his heart.

"Not really, but let the boatmen go into the water, even in the hot weather, in case the winter launch is harmful to the boatman's body! I have heard that the boatmen who repair ships on the beach have been immersed in water for many years, and their life span is not long, and when they get old, they either have backache or back pain, which is really uncomfortable, so this issue is still up for debate. ”

Zhang Ping heard Zhao Dezhao say that going into the water is not good for his health, and his tears were a little moist, because he had been in contact with this aspect and had often seen these people, who had a short lifespan and were sick when they got old. Alas, this is His Royal Highness King Liang, who loves the people. "Your Highness is benevolent, thank you for those boatmen."

"It's nothing, you are all the people of the Great Song Dynasty! That is, my Zhao Dezhao's parents, brothers and sisters, and the safety of the people is the safety of my Zhao Dezhao. ”

"Your Highness—"

"Alright, let's move on. Lao Zhang, it doesn't matter if this dock is headed, because there is cement, which can solve the overflow of groundwater. However, the king was worried about passing through this dock door, because the dock door was used to keep water back when pumping water, repairing ships, and building ships, so it had to withstand the pressure of water outside the dock. If you are not careful, it will cause water leakage, which will delay the speed of ship construction. ”

"Yes, Your Highness." Zhang Ping heard His Royal Highness King Liang say this, and he also felt that this dock door was not proper, His Royal Highness could take into account such details, it was really subtle.

Listening to His Royal Highness King Liang say this, Zhang Ping did encounter some trouble, but when he was thinking about the dock door in his head, the original idea was to use the stacked beam type to block the water, and the stacked beam dock door he referred to was stacked with square wood, and the two ends of the square wood were stuck in the door groove, with simple structure and low cost.

However, in Zhao Dezhao's view, it is completely unnecessary, now with cement, it is possible to build a cement dock door, and the stacked beam operation is troublesome, time-consuming and thankless, if it is winter, it is necessary to let the boatman go into the cold and biting water, which is not good for the boatman's health.

The two of them encountered a bottleneck in the design of the dock door, and the two of them stayed like this for a while, and then Zhao Dezhao said: "Lao Zhang, bring some paper and pen, this king will draw you a few different dock doors, you can see it, if you are satisfied, use this." ”

"Your Highness, there are still a lot of dock doors?"

"It's true that this king's painting skills are not good, so I'm smiling."

"Your Highness laughed." Zhang Pingxin said, His Royal Highness King Liang is so approachable, it is really a blessing for my old Zhang, and it is really a blessing for several generations to be able to work with His Royal Highness King Liang.

Then Zhao Dezhao took a pen and paper and drew drawings of various dock door designs on the paper in turn, such as this herringbone dock door, which is a vertical herringbone door is two doors that rotate on the vertical door axis, but Zhao Dezhao said that because the herringbone door is less watertight, it is still lacking.

The second is the horizontal sliding door, for example, the bottom of the door and the upper edge of one side are equipped with rollers, and the door moves left and right along the upper and lower horizontal tracks when opening and closing. However, at present, it seems that the dock is to build a warship, although most of the ships are inland waterway ships, and the size of the warship is large, if the dock door is closed and the door moves on the edge, this dock door can open a large space to accommodate the ship out of the dock. Therefore, when the dock door is closed, the door edge movement is not suitable for large vessels.

In addition, when the dock door is opened and closed, move along the horizontal track left and right, this can be considered, the people of this era want to bear the conscription, it is feasible, if it is put in the later generations because of the area occupied more, and increase the cost, so the future generations will not be like this, but at present, it is still applicable.

The next drawing is the floating box dock door, it is also known as the floating dock door, the so-called floating box dock door is a box-shaped structure that can sink and float, which is more convenient to use and maintain in later generations, not easy to fail, and is the most widely used. It's just that now for manpower, it is difficult to get the pontoons in the water up, and then empty the water inside, and the pumping link is very troublesome, so I can only sigh with joy.

And the last one on the drawing is the horizontal door, from the drawing, the horizontal door is to set up two hinges at the bottom of the door, and then connect with the dock sill, when the door is opened, the door is poured outward to the bottom door pit, does not affect the ship in and out, but in the waters with large sand content, the door pit is easy to silt, and it is not suitable to use.

However, for the land of Kaifeng, because there is the Yellow River passing through in the north of Kaifeng City, and the Yellow River has a large sediment content, it is indeed not suitable to be used in the Yellow River, and in the south of Kaifeng, the river is developed, the water transportation is busy, and the ships are the majority, so it can be used to lie down the dock door.

And Zhang Ping listened to what Zhao Dezhao said, he was already stunned, and when he listened to Zhao Dezhao's various dock doors, he was also weighing the pros and cons of various dock doors in his heart.

Fortunately, the design of the dock door has been approved, and the next step is to design the rest of the dockyard.

The third place is this drainage and irrigation system, the irrigation is not tight, as soon as the gate is opened, the water will flow in eagerly, but this drainage, it is really difficult. Nowadays, the water in the dock can only be drained by borrowing from the hand-cranked water wheels in the farmland - ancient man-powered pumps. Fortunately, there were many pumping appliances in this era, such as overturned cars, cylinder cars, rollers, etc., and then the rest was handed over to the working people, after all, this was the case in the original era.

According to the plan, the two discussed for a while, and the next thing to discuss was the indoor dock and the outdoor dock. According to Zhao Dezhao's idea and the size of the space to accommodate the ship, only a small indoor dock can be built for the time being, and the large indoor dock that needs to be built also needs excellent steel bars and large steel frames, and in order to achieve the maximum space, the top is a dome.

So far, it is impossible to make a large-scale indoor building for the time being, so only a small indoor dock can be built, and the material is made of cement steel bars as keel supports, mainly cast-in-situ.

"The period that His Highness ordered to do it was all done by the craftsmen." Zhang Pingdao.

"Good!" Zhao Dezhao nodded in agreement.

Then he told Zhao Kuangyin about the construction of the dock, the next day was the auspicious day of the zodiac, after asking the gods to pray, the construction of the dock began to break ground, taught the dock officials to start the first handful of soil, and then began to order people to dig for soil, according to the depth standard of Jinmingchi, and then 20,000 laborers began to dig out, and those clods of soil were slightly better to be used to fire ceramic vessels, and the finished ceramic vessels began to be sold, to fill the financial deficit of building the dock.

A little bit later, it was transported to the salt plains outside the city, where it was laid and dryland crops were planted. After more than half a month, a pool that can accommodate two large ships has been excavated, and the next person is to build a reinforced concrete cofferdam around the pool, and then pour cement on the bottom and all around the pool to prevent groundwater overflow and surface water infusion, and the entire pouring construction project will last for more than a month without interruption, and then wait for the cement to completely dry before implementing the construction of surface buildings.

The dock began to be built under the guidance of Zhang Ping, because of the matter of cement, Zhang Ping's method of operating the dock was even simpler, according to his idea and with the improvement and assistance of Zhao Dezhao, he designed two kinds of docks - dry dock and floating dock.

Zhang Ping ordered people to build a dock in a place in Kaifeng, of which the dry dock is connected to the land on three sides and faces the water on one side, which is divided into a dock mouth, a dock chamber and a dock head.

The dock mouth is equipped with a water retaining dock door for entering and exiting the ship, and the drainage and irrigation equipment is built in the dock piers on both sides of the dock mouth;

The dock chamber is for placing the ship, and the keel pier and the side pier supporting the ship are arranged on the bottom plate of the dock chamber;

The head of the dock is opposite to the mouth of the dock, and its plane shape can be rectangular, semicircular and diamond-shaped, and the space of the head of the dock is part of the dock chamber, where the propeller and the tail shaft are disassembled and assembled.

When the ship enters the dry dock for repair, first fill the dock with water irrigation and drainage facilities, and when the water level in the dock is level with the outside of the dock, open the dock door, lead the ship into the dock, and then drain the water body in the dock, so that the ship sits on the keel pier. It's just that pumping is now done manually.

When the ship is undocked after repair or construction, water is first poured into the dock, and when the water level inside and outside the dock door is level, the dock door is opened and the ship is undocked.

The other is the floating dock, which is a concave cabin that can be moved and floated and sunk. It is used for repairing and building ships.

At the same time, the widening project of Jinming Pond outside the city has been successfully completed, and Zhao Kuangyin, the emperor of the Great Song Dynasty, and Zhao Dezhao, the king of Liang, as well as the hundreds of officials and people present, are all watching the scene of entering the water.

When Zhao Kuangyin ordered someone to dig the cofferdam and introduce the flow of the Cai River, the water could not wait to pour in, and it was still a huge pit in the dark. Suddenly, there was a splash of water at the bottom, and everyone present was amazed.

The people present looked forward to the early filling of this pond, and after waiting for a day and a half, the bottom of the huge pit, which was originally still dark and swarthy, was now rippling, and the yellow water surface was turbid for ten miles, and the city wall looked like a great river.

And next to another waterway in Kaifeng, the construction of the dock is also in progress, seeing this situation, Zhao Dezhao is not only happy and a little sad, he feels that if things develop according to his expectations, the Great Song Dynasty will definitely be stronger.

And now it is only a small step, and then in the sting season, Zhao Dezhao went to the home outside the city to check the planting of rice in Zhancheng, and found that the rice was green and green, and the growth was gratifying, and it seemed that the situation was very good.

At the same time, there is a statue of the god of agriculture Houji in the temple of the view of crops, the eyes of the god of agriculture are smiling, as if celebrating the success of rice planting in Zhancheng, since then the Great Song Dynasty has been in good weather, and the country and the people are safe.

In the fields outside the hall, when Zhao Hongyin, Du Shi and Zhao Kuangyin, who experienced the life of old farmers, saw this crop, they sighed in their hearts, why didn't they discover this rice earlier.

However, in order to compare the difference between Champa rice and local rice, Zhao Kuangyin, the thoughtful emperor of the Great Song Dynasty, immediately instructed the inner attendant to summon Si Nongqing, who was in charge of the country's warehouse, and then asked how the rice near Kaifeng was, and then compared the Champa rice in the Guanjia Hall with other rice, and the careful Si Nongqing found that the rice seedlings from the new type of Champong were growing well, and they were slightly thicker than other rice outside Kaifeng.

And after listening to Si Nongqing's advice, Zhao Kuangyin suddenly regretted why there were not many more. And the Emperor Taishang on the side advised the emperor to wait for the autumn harvest to compare, and then everything will be easy to talk about.