Chapter 896 Reinforced Concrete
Zhu Ping glanced at the sketch, then looked at the design indicators next to it, and asked in surprise, "This, this is too difficult, right?"
Yes, it is very difficult. If you really just want to build a continuous arch bridge, it is not a difficult thing. It is nothing more than connecting a series of Zhaozhou bridges together. The technical difficulty is not great. As long as you are willing to spend money, you can definitely build it.
But this bridge is not like that. Luo Chong clearly stated above that this bridge must allow the current three-masted sailing ships to pass normally under the bridge at low tide.
What is the concept?
The mast height of a general sailing ship is basically the same as the length of the ship. The three-masted sailing ship of the Han tribe is 40 meters long, and the height above the waterline of the ship is about 10 meters. In addition, the mast is nearly 40 meters high. If such a ship can pass normally under the bridge, the arch of the bridge must be at least 50 meters above the sea surface to meet the passage of the sailing ship.
If that's the case, no wonder Luo Chong asked them to erect a bridge pier as tall as a building first. It's already 50 or 60 meters high. If you add the underwater part, a bridge pier alone must be 70 meters high? !
If this isn't a tall building, what is it? !
Zhuping's eyebrows knitted together. He would not refute the opinions and standards proposed by Luo Chong. This guy is purely a technician. In his thinking mode, there is only the question of "Is this feasible?"
Zhuping immediately pondered the entire project and the technical indicators proposed by Luo Chong. He thought for a moment before speaking.
"The leader is talking about the passage of three-masted sailing ships at low tide. This is too difficult, but we may have a way to lower this standard!"
"How to lower it?! No matter how you lower it, the leader requires that three-masted sailing ships must be able to pass under the bridge. You can't let them cut the mast, right? Do you want them to paddle and row across, and then insert the mast after passing?!" Xue Qingyao also raised his eyebrows and asked Zhuping.
"No, no, no, Governor, you misunderstood. Why did we cut the mast? In my opinion, we should remove the hidden bridge.
Governor, if we can cut off a few sections of the hidden bridge under the sea water, lower their height under the water, and leave enough space, wouldn't it be possible for ships to pass through? Then our bridge piers can be built a little lower, which will greatly reduce the construction difficulty and cost, and at the same time meet the requirements of the leader." Zhuping explained immediately.
Xue Qingyao was also engaged in construction before joining the army, so he understood what Zhuping meant as soon as he heard it, and he immediately said with sudden enlightenment.
"Oh, you mean, instead of increasing the height of the piers, we lower the height of the bridge foundation, so that the 'lowest tide level' proposed by the leader is lowered by one level, thus meeting the requirements for passing ships proposed by the leader?
This method is feasible, and it can indeed reduce the technical difficulty and construction cost. As for the underwater reefs, where they need to be removed, we can just blow them up and make several deep water gaps on the entire hidden bridge for passing ships.
And our piers will still be built on top as originally planned. In this way, starting from the lowest water level, we only need to build piers of more than 30 meters on the hidden bridge to meet the needs."
"Yes, that's exactly what I mean. I think it shouldn't be difficult for the Han tribe to dig an underwater passage, right?!" Zhuping nodded quickly in response.
"Of course there are still difficulties, but there must be a way to complete it. The leader is an expert in this area. We can ask the leader for the specific construction methods when we come back.
Our current job is to conduct preliminary geological surveys, and then design detailed engineering drawings. We can ask the leader for the final construction methods.
The first step is to measure the total length of the bridge body, and then calculate the span of each arch based on the load requirements and the structure of the bridge body, and then calculate the total number of piers required according to this span.
The second step is to actually measure the location of each pier, mark the construction location for each pier, and then, while the hidden bridge is exposed to the water, use waterproof sand and stone bags to enclose the location of the pier, drain the water inside, and prepare for the subsequent construction of the pier."
After listening to Zhuping's idea, Xue Qingyao also agreed very much, and then he began to arrange specific work steps, dividing the various stages of the project into reasonable sections. He was worthy of being a contractor in the Han tribe and commanding thousands of laborers to work together.
Zhuping was more interested in this project. He dreamed of learning the new construction skills of the Han tribe. Now that he had just joined the Han tribe, he was entrusted with an important task. Although the county governor was just a figurehead, he was one of the real persons in charge of the bridge construction.
Because in the entire Han tribe, there may be many construction engineers better than Zhuping, but the one who is familiar with the local hydrological conditions and understands construction is none other than Zhuping.
"Then when will we build the bridge piers, and what materials will we use to build the bridge piers?" Zhuping was very interested. Hearing that Xue Qingyao had already made a phased plan for the project, he immediately asked about the details of the construction of the bridge piers.
"I don't know about this either, but it shouldn't be that fast. The leader mentioned in this document that he plans to use reinforced concrete to cast the bridge pier, but the Han tribe doesn't have steel bars and concrete now, and I've never even heard of them. The leader said in this document that the tribe is studying it, and it shouldn't take a long time, but even if it's faster, I estimate it will take a year and a half.
With this time, we might as well have people fill sacks first, then mark the bridge piers and surround them, and then find a way to blast a few holes. When we finish these things, the leader should be almost ready by then." Xue Qingyao said.
"Well, it seems that this is the only way, but I didn't expect that the leader would actually create new building materials and methods for this bridge. It seems that the leader attaches great importance to this bridge. This saying of tendons and soil is the first time I've heard of it." Zhu Ping also complained.
Yes, Luo Chong is indeed studying these things now. Before there was no steam engine, this thing was indeed difficult to fix, but now there is a steam engine, a small train, and a steel mill, he finally has the confidence to waste steel on infrastructure.
In addition, there is the research and development of cement. In fact, the Han tribe has long had the ability to burn cement, but Luo Chong has never wasted manpower on this matter because the traditional burning technology is too inefficient and costly to be used in infrastructure. However, with the newly developed crusher and grinder, iron ore and gypsum can be easily ground into powder, and this efficiency can naturally be applied to large infrastructure projects.
(End of this chapter)
Continue read on readnovelmtl.com
