Chapter 947 Chapter 947 I admire the leader's meticulousness.
After the tasks were divided, everyone got busy quickly. Jiao Ce took the interns to assemble the machine as usual. Fortunately, mixers are not difficult to make. The mixing barrels are ready-made. All you need to do is install the base and the steam engine, and then put the drum on it.
The drum is linked by a circle of gears on the outer shell and the gears on the base, and then connected to the steam engine through gears. It supports the functions of forward and reverse rotation. Forward rotation is mixing, and reverse rotation is discharging from the back. It is basically the same as a modern small electric mixer, but this one is a little bigger and can mix more concrete at a time.
However, for large units like bridge piers, the amount of concrete required is also very exaggerated, so six mixers are directly placed here to ensure that more concrete can be produced at the same time.
As for other preparations, there was some trouble with the fresh water in the logistics department. The place where they mixed the concrete was a bit high. It was simple to dig a reservoir there, but the terrain of the living area behind the well for water digging was a little lower. Even if a canal was dug, the water could not flow through.
In order to solve this problem, they had to ask the carpentry team for help. They directly used bamboo brackets and wooden troughs to build a skybridge from the living area to the cement mixing area.
In this way, the water is first pumped to the six-meter-high water tower with a steam water pump, and the water in the water tower then flows into the water tank in the mixing area through the water trough in the air, which is equivalent to building a wooden slide in the air, which can be regarded as solving the problem of water delivery.
The last key problem left is to tie the steel bars, and Zhuping is responsible for this task personally.
It must be said that whether it is Zhuping or the prisoners of war slaves of the Xin tribe, these people are really good at tying steel bars. Perhaps as Jiao Ce said, tying steel bars is very similar to their previous construction of bamboo houses, which is just tying sticks and other things into a frame. After
Jiao Ce assembled the mixer with his men, he followed them to direct the task of tying steel bars.
There are two targets that need to be poured this time, that is, a group of bridge piers on the land at the northernmost end of the entire cross-sea bridge. There are two in total. First, fill the pre-placed wells of this pair of bridge piers with reinforced concrete. After the underground foundation part is dry and stable, use wooden boards to set up molds to pour the bridge pier columns exposed on the surface, and
raise the bridge piers section by section until they reach the designed size and height. In the pre-placed wells at the two bridge piers, Zhu Ping was personally directing the slaves to tie the steel cage. Rows of cut steel bars were stacked horizontally and vertically, and then the slaves used thin iron wires and iron hooks to wrap around the intersections and tighten them, and then raised them layer by layer. It was even simpler than building bamboo houses.
"Elder Zhu, this doesn't need to be built so high now. After pouring the concrete, we need to use a vibrator to vibrate it. If you make it too high, the vibrator can't be inserted.
"Let's build two layers first, and then continue to raise the steel cage after pouring the two layers. As long as a joint is left on the top, it will be fine. "Jiao Ce reminded Zhu Ping.
"Well, I understand. Are our bridge piers above also completely solid?" Zhu Ping asked curiously again. He was very interested in all the knowledge about architecture of the Han tribe, not to mention this kind of super-large cross-sea bridge project.
Hearing his question, Jiao Ce also explained.
"It's not like that. Only the foundation part below the foundation is a completely solid structure. As for the bridge piers above, it depends on the specific location. "
For example, the two bridge piers we have now are all located on land, and on the hillside. The height is not as high as the piers in the middle section of the bridge, so these two bridge piers can use solid piers.
"Solid bridge piers are stronger, especially in terms of impact resistance, the advantages are greater, but such bridge piers also have their disadvantages, that is, their own weight is too large. If it is too high or the foundation is not strong enough, it is best to use hollow bridge piers.
“For example, our bridge, with both ends on land, is built with solid piers; for the ordinary piers in the middle located in the sea, we can cast a solid foundation, and then use semi-solid and semi-hollow piers, with the lower ten meters solid and the upper part made hollow.
“Such semi-solid piers have three advantages. The first is that they are light in weight, which can reduce a lot of burden on the foundation. The second is that the center of gravity is stable, with a light head and heavy feet, like a tumbler, and can withstand greater impact and swing amplitudes. The third is that they have good lateral impact resistance.
"For example, during the windy season, a strong wind can blow a sailboat into the middle of the bridge pier. The solid lower half of the pier can withstand such an impact. If it is completely hollow, the pier will probably be broken and flooded.
"Similarly, the piers on both sides of the six waterways in the middle of the bridge will be thicker, and the height of the solid lower half will be increased to 20 meters, and the upper part will be hollowed so that they can obtain stronger impact resistance, because the piers on both sides of these six waterways are most likely to be hit by ships." Jiao Ce explained the various properties of the piers to Zhuping in detail.
"I see, I didn't expect that a small pier would have to consider so many things when building it, not only the bearing capacity of the foundation, but also whether the weight of the pier is too large, and the lateral sway and longitudinal support, and even the possible accident of a sailboat hitting the pier. There are so many things to consider, Master Jiao, did you think of all these by yourself? "Zhu Ping said with emotion, and finally looked at Jiao Ce with admiration.
Jiao Ce smiled bitterly, "I am just a mechanical researcher, how can I know so many things about construction? These are what our leader specifically told me before I came here, and several of the considerations were also highlighted by the leader.
"Later, when I told others about these standards proposed by the leader, they immediately regarded them as treasures. The School of Architecture seemed to have said that they would write the leader's standards on bridges into the textbooks!"
"So it was the leader who proposed it. Our leader is really amazing. Not only does he know everything, but he is also so proficient in every aspect. However, to say that he is proficient in everything is not entirely true. Do you know what I admire most about him?" Zhu Ping just said halfway, then refuted his own words and asked Jiao Ce back.
"What do you admire about the leader?" Jiao Ce asked cooperatively.
"I admire the chief for his thoughtfulness, meticulousness, and careful considerations. Take this bridge pier for example. Such a large bridge has never been built by either the Han tribe or our previous Xin tribe, and our current chief is no exception.
"But he seemed to have seen this kind of bridge before. He could think of so many possibilities, including the possibility that a sailboat lost control and hit the bridge during the windy season. The chief could even think of it. If it happened to you and me, could we think of it?
"So this is what I admire most about the chief. I don't know whether to say that he has a broad vision or that his ideas are wild and imaginative, but the word foresight is always appropriate.
"I found that no matter what our leader does, he will first set a clear goal, then make a thorough plan, and finally make each link of the plan clear to each person in charge. It is hard not to succeed if we do things in this way."
When it comes to the leader of the Han tribe, Luo Chong, Zhu Ping couldn't help but sigh again. This young man, who is only 18 years old, is simply a natural leader. He is really good at developing tribes. He can manage a tribe of hundreds of thousands of people in an orderly manner, especially the county system. The management system of the county system, which treats the entire Han tribe in a hierarchical manner, is a genius.
Jiao Ce also nodded in agreement. He recalled what happened this year in his heart. It was indeed as Zhu Ping analyzed, from Luo Chong's proposal of the Great Life Storage Plan, the storage of strategic grain for the entire tribe, to the subsequent train development plan.
How many trains do you need to produce in total is Luo Chong's goal. How long will it take to manufacture and produce, how many new railway workers will be trained, and who will be equipped with them first after production, this is Luo Chong's plan.
Who is specifically responsible for the specific implementation steps? Isn't this to clearly define the person responsible for each link? !
After hearing what Zhuping said, he felt that it was true.
Then Jiao Ce instantly looked up to Zhuping, the former elder of the Xin tribe.
This old man is not simple either. This guy has never even seen the leader, but he can analyze the leader's way of doing things from hearsay and the policies issued by the central government. Obviously, he is not a simple person.
These days, people with such clear logical thinking and good at thinking and imagination are already capable people. Isn't the reason why humans can rise because they have learned to use their brains?
While the two were chatting, the progress of the project was also advancing rapidly. The gravel on the quarry side had piled up into a small hill and was being transported to the mixing area one by one. The water reservoir in the mixing area was also full of fresh water for mixing sand and gravel. The two ships of cement brought by Jiao Ce were also pulled to the mixing area. Now only the sand has not been transported to the right place.
Finally, a few days later, the first ship of sand from the mouth of the Qingshui River on Qiongzhou Island arrived, and Jiao Ce and his team were ready to start work immediately.
It took another two days to transport the sand to the mixing area, and Zhuping and Jiao Ce discussed, "Let's start now. According to the design drawings, the two bridge piers are not very high, so it's just right for us to practice with these two first."
"Okay, I agree. Now we are all ready and can start at any time." Jiao Ce also nodded and expressed his opinion. "
There is no problem here. If there is a shortage of water, just give a call, and the water will be supplied to you at any time as soon as the machine is turned on over there."
"It's the same here. The wooden boards are also prepared for you, but I heard that the part below the ground seems to be unusable, which is a bit of a pity."
"What's a pity? We will use those wooden boards sooner or later. It doesn't matter if we prepare them first, but if you have time, it would be better if you can make a few sections of molds specifically. When we pour the bridge piers, we can directly splice them together with the molds. In this way, we don't have to build the molds back and forth, and it will be more convenient when pouring." Jiao Ce suggested again.
"Then listen to Master Jiao. Give us a drawing and standard, and we will prepare it right away. We will make sure that the mold is made before you finish pouring the bridge pier foundation." The leader of the carpentry team also patted his chest and promised.
"Okay, then I will have someone send you the drawing in a while." Jiao Ce immediately agreed.
"I have prepared the sand and gravel here. Now I have two ships of sand in reserve. It will definitely not be used up for pouring two foundations. If the gravel is not enough, there are still productions over there day and night, and it can be replenished at any time. There is no need to worry about this."
"I have also tied up the steel cage here. The horizontal and vertical surfaces are all No. 14 steel bars, all tied into steel mesh at a spacing of 15 centimeters. The inner and outer columns are made of No. 50 threaded steel bars. The iron rods look as thick as a child's arm. I think it is absolutely safe to use this thing to make the skeleton of the bridge pier." Zhuping also explained his character progress.
"Okay, then let's start now!" After listening to all the preparations, Jiao Ce immediately issued the order to start work.
The mixing area not far from the bridge pier immediately became bustling with the roar of machines.
Six steam mixers were turned on at the same time, and a huge drum with a diameter of two and a half meters was rotating at a constant speed. At one end of the drum's feeding port, the cement had been completely untied and poured onto the ground into a small hill.
Slaves wearing masks were adding cement shovel by shovel. Although it was added manually, the proportion was still the same, one shovel of cement, two shovels of river sand, and finally four shovels of gravel, and then add water and let it roll and mix by itself.
As for how much water to add, this is mainly determined by visual inspection, depending on the fluidity of the finished concrete. As long as it can flow freely like mud and fill every gap in the mold, it will be fine. If the fluidity is not enough, then continue to add water, otherwise add materials.
Wuuwuwuwu————
The drum keeps rotating, stirring cylinders of concrete. When the mixing is almost done, the air intake direction of the steam engine is controlled to make the drum reverse, and the already mixed concrete will be spit out from the back of the drum. A large number of iron bucket carts are waiting in line at the back. When they are full of concrete, they will be quickly pushed to the bridge pier, and then the concrete slurry will be poured into the pre-set well of the foundation along a wooden trough.
There are also several workers busy in the pre-set well. They use shovels to constantly dig out the concrete that has not flowed cleanly in the wooden trough, and then level the surface of the concrete in the well. Then, they use pneumatic vibrators to insert into the concrete to vibrate evenly and expel bubbles. After the poured concrete covers the surface of the steel cage, they will put in another layer of pre-bound steel cage, and then continue to pour concrete, and repeat this process until the pre-set well of the bridge pier is filled.
(End of this chapter)
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