The prince handed over the design task of the ice cellar to Ma Ping. Ma Ping was an expert in designing imperial tombs, and it was no problem for him to design an ice cellar. Ma Ping accepted the task without saying a word, although the Imperial Tomb and the Ice Cellar are two completely different buildings, and the building requirements will not be the same. But there is one common feature that is that they are all digging holes down. Ma Ping did not prevaricate or set all kinds of conditions, and immediately returned to his husband's study to start preparations. In ancient times, there was no refrigeration equipment, so ice cellars could only be used to store ice. Ice cellars generally have to be dug to a depth of about three zhang underground, that is, ten meters. Most of them go to the nearby river in winter to collect ice, cut the ice into pieces, like square bricks, and then transport it into the ice cellar, put it neatly and neatly, cover it with wheat straw, and then press it with soil, so that it can play the role of preservation and sealing, and in the summer the ice is taken out and used.

The prince thought that as long as the floor of the ice cellar was paved with stones and hooked with cement, it would be foolproof, but he didn't expect that there would be no cement joints between the stones and the stones. Because the stones chiseled in the quarry are generally large and square, the two stones fit so closely that there is no need to hook them at all. After digging the pit, the soil next to the ground should be a layer of grass ash about two feet thick, and then two feet thick white lime, which is used to absorb moisture. The top is two or three feet of loess, but it should be tamped. The loess is topped by strip-shaped stones, and on top are square-shaped stones. In this way, the groundwater cannot penetrate.

Although the method is very primitive, the effect is quite good.

In the Qing Dynasty, the imperial court had very strict rules on the use of ice. The Ministry of Industry and Water Affairs has jurisdiction over eighteen large ice cellars, collectively referred to as "official cellars", which are specially used for the court and government ice. In addition, the royal government can license its own ice cellars to supply the royal ice for use, and the people in the market are not allowed to operate the ice cellars without authorization. In addition to supplying the palace and the government, the ice cubes of the Ministry of Industry can also be sold, and the price is still very expensive, selling for five taels of silver per 100 catties. The average catty is 50 wen. The prince wants to deal in cold drinks, and he has also obtained the emperor's approval to build an ice cellar, so the horse staff can rest assured and boldly design an ice cellar for the prince. Ma Ping is a layman who installs a rubber tire carriage, but he still understands underground construction very well.

Driven by Yun'er's latest drawing equipment, Ma Ping came up with the design of a large ice cellar within five days.

Since all the buildings of the Ruiwang Mansion were designed by Ma Ping, he was very familiar with the inside and outside of the Ruiwang Mansion, including a spring in the northwest of the mansion, where the perennial trickle was intercepted and supplied to more than 400 people in the mansion for drinking, bathing and washing.

Not far from the Nanda Wall of Nanwai Province, there is a small river, and several small fish can be seen in the clear water. The site of the ice cellar was chosen in the southeast of Nanwai Province, which is very close to the small river, and the river water is the place where the ice is taken in winter. Low groundwater levels and good water seepage are favorable conditions for the construction of ice cellars. Due to the abundant funds of the prince, the ice cellar designed by Ma Ping is all made of stone walls, and the double-layer stones are filled with rice husks and other materials for insulation. A rectangular trench with a width of one zhang and a depth of two zhang was dug from the side pillars of the cellar to five feet, and the bottom of the ditch was made of stones to form a plane, and a seepage well was dug to communicate with the outside of the cellar, so that the ice could be drained in time after it melted. The roof of the cellar is arched with bricks and covered with insulating materials such as straw. Arched doors are opened at both ends of the cellar to facilitate the loading of ice. A buffer room is provided outside the door to prevent direct intrusion of hot gas. The prince fully affirmed Ma Ping's ice cellar design drawing, and supplemented the use of building materials that were not available in the Qing Dynasty such as cement plastering on the cellar door. The ice cellar is not ornate on the outside, nor is it decorated in any way. The ice cellar is filled with ice, and there is no need to decorate it with glazed tiles like the ice cellar of the Ministry of Industry, so as not to cause trouble to yourself and attract a crime of exceeding the system.

According to this design drawing, the construction officially started. Ma Ping is the first person in charge of the ice cellar, Wang Ye is the commander-in-chief, and Tian Liang is the technical supervisor. The construction workers are all pro-soldiers in the house, taking turns digging earthwork and building stone walls. The tables played their due role as three-dimensional ladders again. What the prince is most worried about is heavy rain during this period. One is that it is not easy to construct when it rains. The pit dug is filled with rainwater, which will increase the difficulty of construction, at least the excavation of the earth will become the digging of clay; Another is that when it rains, the water table may rise.

Wang Ye and Tian Liang found a large red and blue striped tarpaulin in the No. 12 treasury, and erected a steel frame around the place where the earth was to be excavated, covered with tarpaulin, and neatly stacked woven bags full of soil on the edge of the pit, one to prevent sudden heavy rain from pouring rainwater into the pit. One is to shade the soldiers who are digging the earth, and in addition, a few short logs are fixed on the wooden frame at the edge of the pit, and a rope is wound around the log, one end of the rope is fixed on the log, and the other end is suspended from the earth basket, and the earth can be lifted by turning the log. Wang Ye and Tian Liang figured out that the two ends of the rope could be suspended from the earth basket, one basket of soil was lifted, and the other soil basket fell down. This is a roller pulley. As long as the rope is wound properly, the roller can be kept working. This allows the soil in the pit to be lifted up from different angles. If the pit is very deep and the digger can't come up, he will also press the pulley to hang it up. This wheel was not invented by Wang Ye and Tian Liang, but was invented and used in the 11th century BC, that is, at the end of the Shang Dynasty and the beginning of the Zhou Dynasty. In the era of King Wu of Zhou, there were records of crossing the trench with a rope bridge. In the Tang Dynasty, there was a water lifting device called "machine drawing", which was to combine the roller and the overhead ropeway in order to lift the water from the mountain to the top of the mountain. This method is very labor-saving for watering the ground. Although the scientific and technological product invented by the ancestors is very good, everyone usually uses primitive and stupid methods. There is a building construction thing in other houses, and I haven't heard of anyone using pulleys. Moreover, the pulleys of the Rui Wangfu are from more than two hundred years later.

Ma Ping is an expert in this regard, and he said that there are too few people digging pits. The prince added more than a dozen personal soldiers to dig the earth. Anyway, this ice cellar will not be used this year, and it will be possible to complete the ice installation in winter. It is not enough for too many people to dig the earth, and the soldiers still have to stand guard and patrol.

The prince dug the first spade of soil, and the foundation work of the ice cellar began. The soldiers and guards who were dispatched took turns to work, and the ten-meter-deep pit could not be dug in three days or two days. Then do your best. But be sure to put the stones on the ground tight before the flood season. Then stone pillars were built on both sides and in the middle, and the roof of the cellar was herringbone ridged and double-sloped, which was very solid, eliminating all the possibility of collapse.

As for the collection of ice cubes in the future, there are many channels: the emperor transported it from the ice cellar of the Forbidden City, the donations of various royal relatives, the ice in the river in winter, and the ice frozen by saltpeter. There is also a secret weapon freezer to make ice.

The king's ice cellar is in full swing. There is the expert supervision of Ma Ping, the emperor's mausoleum, which can be designed, and the progress is very fast. This ice cellar has a lot of space, and if it is filled with ice, it can completely solve the problem of cold drinking ice for a year.

There are similarities between the ice cellar and the dungeon, and there are also differences because of the different functions. The dungeon is pretending to be dead, and it can't breathe air, and the ice cellar is specially refrigerated, and it's not okay if the air is not permeable, and if people outside come in, it won't be bad if there is no air inside?

The ice cellar of the prince is not conspicuous at all from the outside, but the inside is very large, and the prince plans to store vegetables if the ice cubes are not used in such a large place. There are also white sugar and candies bought from exotic places, which are afraid of heat, and iodized salt in the ice cellar will also delay the time of hardening.

Ma Ping saw cement as a building material for the first time and asked the prince for advice. The prince told him that the characteristic of cement is that it will become very hard after plastering the walls and floors.

"Then you do a good deed and set up a cement manufacturing workshop or ...... in our Daqing Dynasty."

"No! The process of producing cement is very complicated, and people in foreign countries have large-scale equipment for producing cement, power and skilled engineering and technical personnel. It's a university and a lot of money. Even if the equipment, raw materials, and personnel are available, no electricity is equal to zero. ”

"Let the emperor pay for electricity."

"Hehehe, how can you, a scientific and technological person in the Qing Dynasty, speak in layman's terms? Are you a pile of coal? That's high-end technology, it's something you can't grasp or touch, it's like lightning in the sky, can you catch it? Dare to catch it? If you don't study for twenty or thirty years, you won't be able to master it. And making cement will pollute the environment, so let's just make a little use of it. ”

Ma Ping was speechless. In the few days of "health preservation", Ma Ping personally appreciated the characteristics of cement that the prince said, it is indeed like that, and after drying, it is almost as hard as a stone. In this way, it can be strong and stable. After the four walls, floors, and columns are completely dried, Ma Ping supervises and covers the ice cellar.

For such an uncomplicated building as the ice cellar, Ma Ping is still very sure. Therefore, the construction of the ice cellar progressed quickly and smoothly under the supervision of Ma Ping.

Ma Ping knew that in addition to his own ice cellar construction site, the prince also had a greenhouse construction site under construction. I was very interested and found an opportunity to come to the greenhouse construction site.

It feels like the greenhouse construction site is a little earlier than the progress of the ice cellar, and the soldiers are building a kang on the dug foundation.

The prince bought the frame of five greenhouses in a foreign land, one for raising seedlings, one for cultivating potted flowers, one for raising goldfish, one for planting out-of-season vegetables, and one for planting southern vegetables.

In a foreign land, Wang Ye has been learning various techniques in agriculture from Mr. Zhong, an agricultural expert. Before returning home, Mr. Zhong designed a geothermal greenhouse for the prince with a steel pipe assembly structure for raising seedlings.

The building materials bought back by the prince are also high-grade in foreign lands. On the surface, it looks very simple, it is just a glass house. According to Mr. Zhong's drawings, it is necessary to dig a pit in advance and build an underground heating network. This heating network is the same as the brick kang in the countryside, forming an underground heating surface that is both ventilated and dissipated. The greenhouse of the prince is based on the experience summed up in the foreign land in the past few years, the shed is 100 meters long, the shed is 10 meters wide, the shed is 3 meters high, facing due south, east and west, and the most light is seen throughout the day.

The first greenhouse built by the prince is specially used to raise seedlings, and it can be planted in the wax moon before the new year, and when the weather warms up in February and March, the seedlings have grown very tall, and at that time transplanting into the earth is not a few months earlier than sowing seeds in the earth. When fresh vegetables are on the market at a time when there is a shortage of greens, the price can be increased exponentially.

It is a large, full-daylight glass greenhouse with a square seamless steel tube frame and screw connections. The glass is an ultra-thick tempered glass embedded in the steel tube frame, and small stones, hail, and light vibrations pose no threat to it. Because of the good light transmission, the plant receives sunlight all day in the greenhouse, and with proper water, fertilizer and careful care, do you still need to worry about it not growing well?

The drawings of the greenhouse were designed by Mr. Zhong himself, although they are not very complicated, they are very novel, novel and reasonable.

The site of the greenhouse is selected under a high wall in the northwesternmost part of Nanwai Province without trees to block it, and every one meter of length there is a strong square steel column, and each column has a groove to inlay the steel pipe frame. Due to the precise dimensions, the entire steel tube frame is not misaligned when it is connected together, which can be said to be a perfect fit. Each small frame is pre-framed with tempered glass. The light visibility of the greenhouse is 100%, and the north wall is supported by the original courtyard wall, and there are trapezoidal brick stacks built of blue bricks of the Qing Dynasty to rely on, which can block the north wind and low temperature in winter.

The ground is heated by geothermal heat. After the pit is leveled, the four frames of the pit are built with red bricks brought back from foreign lands at the edge of the pit, and the pit is built with red bricks like a fire kang to build a passage through fireworks. The bricks are paved with a layer of clear green bricks. Equal to the length of the entire greenhouse. Stove doors and chimneys have been set aside outside facing the passage, and firewood, leaves, dead branches, horse manure, corn cobs, etc. can be used as fuel, so that the heat can spread through the smoke passage throughout the underground heating network of the greenhouse. In the coldest weather of winter, there is plenty of sunlight on the ground, warm heat underground, and a thick wall at the back to block the wind. At the same time, straw curtains and quilts are also prepared for the glass greenhouse to keep warm at night. It's very hot in the greenhouse, but there are ventilation windows that can be opened and closed.

There is a well in the northeast corner of the alloy greenhouse, which was originally a flower house, and the well was used for watering flowers, which was enclosed in the greenhouse, so that the water temperature for watering various seedlings in winter would not be too cold, and it would not freeze.

It can be said that this facility is relatively high-end in foreign lands. The good thing is that you can disassemble it freely, if you don't use this shed site, you can disassemble the small alloy frame and build a shed elsewhere. Then the glass is better protected than the plastic film, which lasts longer than the plastic film. Plastic film always has to age, of course, the price of plastic film is much lower than that of glass, and the service life is much shorter.

The soil used for planting on the kang can be taken from the fertile soil with more humus in the mountains and forests, or the soil can be taken according to needs. They took the soil from the col of the West Mountain, in other words, they took the rotten leaves, bird droppings, and other fertilizers that were almost all humus, and when they returned, they mixed a certain percentage of the soil and did not dig up the surface of the West Mountain. Wang Ye and agricultural experts have been together for a year, and they still understand soil desertification.