After understanding the leader's intention, the people of the construction company fully understood the focus of the construction.
"After all, this is a conference venue, not a stadium." Mei Wan looked at the drawings piled in front of her. These were the drawings that her subordinates had drawn for several nights. There is no large-format wide-format printer in this time and space. It was drawn stroke by stroke on the drawing board head-on.
"Do we need to build a runway?" Li Xiaolu, who is responsible for planning and design, asked.
"The runway still needs to be built, and it will be used for military parades and mass demonstrations. The material is cinder." Mei Wan held her chin and thought about it. "The site should be paved with sand and gravel mixed with lime and rolled. It will be fine if it doesn't accumulate water when it rains. .No other facilities are required.”
Building materials were scarce, so the large terraced stands surrounding the stadium were not built for the time being. The focus is on the rostrum. According to Ma Qianzhu's vision, this rostrum must be majestic and solid, and make people admire it at first sight.
"Majestic, spectacular, and it needs to feel very stable, do you understand? Stability symbolizes the great power of our new regime and its prosperous prospects..." Ma Qianxu gestured, not knowing what language to use to describe it.
"Just like **Plaza?"
"Yes, but don't copy it."
"If you ask me to copy it, I won't be able to copy it. I'm a bit complaining," where do you get so many resources? "
"Make it as effective as possible. You can brainstorm ideas."
So in the evening everyone began to brainstorm the structure of this large rostrum. The most common one is naturally the common appearance of a stadium rostrum, with a high platform in the middle and slightly lower and extended stands on both wings. There are overhanging eaves above the rostrum. Very traditional, but quite practical. However, this design is too ordinary and obviously cannot satisfy Ma Qianzhu's ideas.
However, word of this building spread. After that, many architecture enthusiasts came to the construction company to offer suggestions. Various renderings have been released.
The last thing built was a neoclassical building. A huge masonry step, 300 meters long and 12 meters high. The top step is a colonnade that runs through the entire step. In the middle of the colonnade is a huge screen wall - used to hang the symbols of the political power, the national emblem and the like. There are 12 smaller rectangular screen walls evenly distributed on the entire colonnade, used to hang flags and things.
At both ends of the steps, a square pedestal similar to the shape of a beacon tower is set up. According to the design, two huge torch cages will be installed here.
A prototype of this design was made and presented to the executive committee meeting. As soon as the plaster model was revealed, there was an awkward silence in the meeting - everyone in this group had seen the movie of the Nuremberg Party Congress and immediately recognized this thing as the viewing platform at Nuremberg Zeppelin Airport. Reprint - it was designed by Dr. Speer.
Everyone present was careful not to mention the blueprint of this building. In fact, everyone likes the spectacular feeling in the Nuremberg Party Congress film, but they are afraid that once this layer is lifted, the universal fig leaf will force everyone to abandon it.
"It's spectacular." Ma Qianzhu agreed, "But is the structure too big?"
"It's okay. According to the scale of this stadium, we can design the steps to be 24 meters high," Mei Wan pointed to the rendering hanging on the blackboard. "Now the steps are only 12 meters high, which is half less."
Wen Desi also liked this design. It was indeed spectacular. He had already imagined what he would look like standing on the rostrum during military parades and speeches: "I think the best is 24 meters. This length is a little short with 12 meters."
"The main reason is that the materials and labor are limited, so we can only reduce the scale a little." Mei Wan said,
"I think it doesn't matter. This is a century-old plan. It would be beneficial to invest more." Wen Desi said.
"That's right. Just increase the height." Ma Qianzhu was very generous on this issue, "What about the building materials? It looks like they are made of stone. How many cubic meters of stone will it take?"
"This can't be a pure stone building. There are not enough masons. Although it is more efficient to quarry stone with black gunpowder, grinding and cutting also requires manpower. Therefore, we plan to use a rammed earth structure with simpler technology. It is similar to building a city wall, with stones on the outside. Block." Mei Wan was already prepared for this question.
"What's the color of the stone? Can it match? It's best to have an almost white effect."
"The color of the stone mined in Bairentan is blue-gray, but we can use lime to whiten it, and the effect should be okay."
"Why should it be painted white? People in this time and space think white is an evil color."
"Is it painted the same red as a**?"
"It doesn't match the style. It's ugly."
"I think it's best to paint it golden yellow, a shining, sacred golden altar."
"The golden color is a blatant rebellion! What else are you going to use to paint it golden? If it's not painted well, it will look like a temple. What's so sacred about it?"
In the final approved design, it was decided to paint it white with lime water. Anyway, the houses of the ancients were also painted white with lime water. I didn't hear that they thought it had a sinister color.
In the formal drawings, the colonnade above this large rostrum was removed. It is really difficult to build such Roman columns in batches in Lingao. However, sufficient width was left during construction for future additions. The height of the entire building has also been raised to 18 meters.
Although the colonnade above was not built, the screen wall used to hang the badges still appears in the official drawings. As for the screen walls where flags are hung, Mei Wan decided to temporarily replace them with wooden frames. Each wooden frame is 12 meters high to hang flags. Of course, it can only be practical when the wind is relatively light, otherwise the flags will be blown like sails. Gotta cheer up.
Considering that there will be typhoons here in late summer and early autumn, these wooden frames are designed to be detachable. They can be disassembled and stored inside the building when not in use. Although it is a rammed earth internal structure, some rooms are also opened in it. and channel.
After the design was approved, Mei Wan began construction. One advantage of the rammed earth structure is that workers do not need much skills and ordinary laborers can be used on a large scale. Hakka people from Fujian generally have the habit of building earth buildings and are relatively experienced. Use these people as foremen to ram the earth. Coupled with farmers recruited from the commune and outside, the project was carried out with great vigor. At its busiest time, nearly a thousand migrant workers were working on the entire construction site. There were also two hundred people quarrying and cutting stone in various quarries. There are also more than a hundred people collecting burnt lime from oyster shells at the beach.
In order to strive for progress, Mei Wan also used construction machinery to assist. Excavation, piling and simple compaction were all done using machinery, which greatly improved the efficiency.
Limited by the mason's processing ability and technical level, Mei Wan found that some large and complex structures could not be processed by masons. The largest stone that the local masons have processed is only stone arch beams for bridge repair, and they have not been used for many years.
"It would be great if there were steel bars and we could just make prefabricated concrete parts." Mei Wan came back from the stockyard and felt very sorry.
"Steel is so scarce now that the metallurgical department is not willing to make steel bars at all," Yanquezhi said.
"How about making it out of bamboo?" Merlin said. He comes from a small background as a construction worker. In the Lingao Construction Company where there are so many talented people, it is natural that they can only serve as low-level engineering technicians.
"Bamboo reinforced concrete?" Mei Wan thought for a moment. He had indeed heard of this technology, using bamboo instead of steel bars to make prefabricated structures. It was popular for a while in the 1930s and 1940s of the 20th century. During the Great Leap Forward, in order to solve the problem of material shortage, it was also carried out in China for a period.
"No, the yield strength of bamboo is far inferior to that of steel -" Bingfeng said quickly. He himself was engaged in steel structure construction, so of course he had heard of this crooked thing. However, it has been abandoned by the construction industry for a long time and obviously cannot meet the requirements of use.
"How will you know if you don't try it?" Mei Wan thought that if the test was successful, it would be great news for the construction company and the time travelers - there would no longer be a need to waste a lot of wood to make beams, columns and floors.
"Boss, once things like cement prefabricated parts collapse, people will die." Bingfeng remonstrated bitterly. Could it be that the tofu projects of later generations haven't had enough troubles, and they have to go to a new time and space to toss.
"Ice technician, if we look at this issue from an overall perspective, it won't work to just stick to the safety standards of past time and space." Merlin said.
"What?! Safety standards are different from the modern and the past?" Bingfeng was furious.
Mei Wan dissuaded him: "Don't be angry. This is a technical issue. Let's just discuss it." He turned to Li Xiaolu who was drawing the overall structure diagram.
"This, take a look." Li Xiaolu carefully sketched the drawing, "I majored in planning and environment, but I don't understand architectural structures."
Yan Quezhi said from the side: "Boss, you have to be careful. Construction is a century-old plan. Once something goes wrong, it will be infamy for thousands of years."
Merlin was still calm: "The question now is to solve the problem of whether there is or not, right? The executive committee has many projects to be launched next, and using wooden boards is not the answer - Lingao doesn't have that much wood, so it must be built It's prefabricated. Since it's still unknown when the Ministry of Metallurgy will be able to produce enough steel bars, it would be a good idea for us to give it a try. If it succeeds, everything below will be easier to handle."
These words moved Mei Wan, the temptation was too great. He made up his mind:
"Okay, let's give it a try, starting with small pieces."
Most of the people in the Lingao Construction Company have a background in construction and have some understanding of bamboo reinforced concrete. Bamboo bars as a substitute for steel bars have been an attractive topic for a long time. After all, bamboo has a fast growth period, is cheap, and is easy to process. Its use can save a lot of costs.
However, bamboo bars have never been able to replace steel bars. The main reason is that the tensile strength is not as good as steel bars. The best bamboo bar materials are only equivalent to 80% of steel bars, and most are only 50%. Moreover, the elastic modulus of bamboo bars is only one-tenth that of steel bars. This shortcoming is quite fatal. Moreover, bamboo reinforced concrete also has problems such as corrosion, insect infestation and difficulty in adhering to the concrete, so it is not that simple to use.
First, we need to look for suitable bamboo reinforcements. There are many kinds of bamboos, but the bamboos that can be used for bamboo reinforcement concrete are basically concentrated on bitter bamboo, Mengzong bamboo and light bamboo. Among these three bamboo materials, bitter bamboo has the best tensile effect. The Japanese During World War II, a large number of bamboo reinforced concrete tests were conducted, and it was believed that bitter bamboo was the most suitable bamboo reinforced material.
Bitter bamboo is widely distributed in China. Although it is not found everywhere in Hainan, it is not difficult to find. Immediately a call was made to the Forestry Department under the Agriculture Council.
"Want bitter bamboo? No problem, I will send someone to harvest it tomorrow." Wu Kuangming said on the phone.
"No, we will put the bamboo harvesting requirements on you later. You must make it clear to the harvesting team and harvest according to our requirements, otherwise it will be useless."
The raw material of bamboo tendons, bamboo, is very particular. First of all, it cannot come from soil that is too fertile. Bamboo in soil that is too fertile will have thick walls, soft texture, and lack of elasticity. Bamboo joints are easy to break after being harvested - and the bamboo joints are the parts with the highest tensile strength in bamboo.
According to the experience of the Japanese, the bamboo used for bamboo tendons is best harvested from mountainous areas where trees such as cedar trees are mixed. The bamboo poles are tall and straight, the bamboo joints are short, the walls are thin, and the elasticity is good. The harvesting time should be carried out on a dry, moonless night, because bamboo harvested at moonlit night contains more water, and the bamboo juice has a sweet taste and is easily eaten by insects.
The harvesting age of bamboo should be 5 to 6 years. If it is too short, it will be too soft. If it is too long, it will gradually lose its oiliness and lack of elasticity. Even logging itself has certain technical requirements. I saw the information that Luo Duo found from the big library. Mei Wan smiled bitterly and said to Merlin: "This thing is not easy at all."
Mei Lin didn't know what to do. Seeing that this bamboo reinforced concrete manual was so thick, he felt guilty and was afraid that if it was too complicated, he would become the initiator. But now that the work has begun, we can’t be soft and have to act confident:
"The complicated procedures are indeed effective. Otherwise, it would be meaningless to write a book like this. This is the accumulated experience of engineering and construction predecessors."
The harvested bamboo can be used as bamboo tendons only from the 2nd to 21st sections above the roots. The bamboo sections must be dense and well-proportioned, with no signs of decay or insect infestation. The harvested bamboo is sent to Bopu for timber. Go to the processing plant, where it is first moderately dried and watered - it cannot be dried too dry, and a certain amount of moisture must be retained. Then anti-corrosion, waterproofing and alkali-proof treatment are carried out in Bopu's chemical plant.
Because of the peculiarity of the plant, bamboo bars absorb water and expand when concrete is poured. As the concrete gradually dries, the bamboo bars shrink and harden due to the loss of water. Moreover, the shrinkage of bamboo bars is greater than that of concrete. The speed is also much faster. In this way, it won't take long for the bamboo tendons to slowly drag away from the concrete, and the adhesion between the two will be lost.
In addition to the problem of water dragging, bamboo tendons also face alkali corrosion. Japanese tests before World War II showed that untreated bamboo bars were corroded by alkali and completely lost their strength after being placed in concrete for 6 months. ! ~!
