Yan Lide asked as soon as he arrived. "Duan Lun, do you know whether a house is built stably and whether it is safe? Where to look?"

"I know, it all depends on how well its foundation is laid?" Duan Lun responded immediately.

"Yes, if the foundation is not laid properly, then no matter how magnificent a high-rise building is, it will collapse! If it is built, it will be in vain, and it may even cause casualties. This is not advisable for people!"

"Yes, you are right! That's it." Duan Lun responded.

"Then for the same reason, if we want to build a bridge in the sea, we must build the bridge piers firmly. The bridge piers here are equivalent to the foundation of the house.

If there are any flaws in the construction process of the bridge piers, the entire bridge will be very unstable. But if the bridge is shaky, there is a risk of collapse and falling into the sea at any time once you step on it! Therefore, the construction of the bridge piers will have a great impact on the entire bridge.

The establishment of it plays a vital role!”

There is no need to worry about the bridge deck at all.

Then the pier is the key.

"Yes, so if you want to go through such deep water to build bridge piers, what exactly do you do?"

"In the sea, we are very susceptible to the influence of sea water. Just like this sand table, there is a lot of water here. How can we carry out construction here? How can we build bridge piers well and ensure life safety. Create an extremely stable bridge

Pier! Mr. provided three plans, and I made improvements to these three plans!"

"You say!"

Duan Lun knew something important was coming.

"Three ways, or can be said to be techniques, to successfully insert bridge piers into the seabed."

"yes!"

Duan Lun listened very carefully, and then Yan Lide got to the point.

"The first is the cofferdam method. Because of the special characteristics of the sea, it is difficult for people to construct in the sea. Therefore, let's think about whether we can turn the sea into the same environment as the land. Let the foundation of the seabed be exposed. That would be

Isn’t the problem solved?”

"That's okay!" Duan Lun was shocked.

I really want to think that these were all thought up by Li Min and Yan Lide.

These bridge-building ideas are incredible.

"By the way, how to do it?"

"What I just said is the core of the cofferdam method. According to this theory, large steel plates, stone dams and other materials that can block the flow of water are first used to enclose all the places where the bridge piers are to be built. Then use pumps to drain all the water inside

Drain it. In this case, it is equivalent to building a wall in the sea to separate all the sea water. Workers can use land work methods to construct inside. After the bridge piers are built, the wall can be demolished.

But although this method is good, it has a huge shortcoming, that is, it cannot be operated in too deep sea areas. If the sea water is deep, the cost will be immeasurable."

Then Yan Lide demonstrated it again, which made Duan Lun feel amazing.

It's not possible to understand the mystery just by talking about it, but when Yan Lide operates it, it becomes very clear.

"I see."

Yan Lide started talking about his major when he came across it.

“And there are five types of cofferdam methods!

The first method is earth-rock cofferdam. This method is the most economical and the least technically difficult.

The second type is steel sheet pile cofferdam, which is the most commonly used form of cofferdam and has a wide range of applications. It has high strength and is easy to drive into hard soil; it can be constructed in deep water and has good waterproof performance;

Cofferdams of various shapes can be formed as needed and can be reused multiple times.

The third type, the steel box cofferdam, can be used as a water-retaining structure for cap construction, or as a support structure for the drilling platform. The loads it bears include the impact force of water flow, water head pressure, and the vertical force exerted by the drilling platform.

.

The fourth type is the locking steel pipe cofferdam, which has the advantages of easy overlapping and good sealing, and can fully play the role of surrounding water, soil and sand.

The fifth type is concrete cofferdam, which is generally used on the rock surface of the river bed without covering layer and where the water pressure is high. Its main characteristics are erosion resistance, high safety and good anti-water permeability, so it can be considered as a permanent

It is part of the structure, but construction is difficult.”

Yan Lide said too much at once, and Duan Lun couldn't remember it at all.

"So besides cofferdams, is there any other way to build a bridge? I heard you say that that method may be much more expensive if the sea water is too deep, and the sea water next will be very shallow, so,

I want to know if there is any other way?" Duan Lun said again.

Yan Lide nodded.

"Yes, let's talk about the second one, the caisson method!"

"What method is that?"

"Have you ever tried blowing air into the water with a reed pipe, then the water will come up, and then there will be no water in the reed pipe!"

"Yes, I have indeed done such a thing."

"Then the principle of the caisson method is the same."

"Ah? I don't quite understand!"

"How to do it specifically? It is to slowly sink a stone box with a roof and no bottom to the seabed, and then continuously input air into the box, and all the seawater inside will be drained out, and finally a space without seawater will be formed, and then

Construction is ready. Although the operating environment is similar to that on land. However, the most fatal disadvantage of this method is that it is extremely harmful to the human body. People are prone to diving sickness, and in severe cases, it can lead to total paralysis!"

"Then what's the third way?"

"Yes, the last one may be suitable for the next construction!"

"You say!"

"That's piling!"

"What is this?"

"This is like inserting a branch into the soil. As long as it is inserted to a certain length, the branch can be fixed, and then we can add things on top. The core of this method is here. However, we use boats.

Carry out piling treatment on the seabed and insert the pile body deeply into the seabed."

After Yan Lide said so much, Duan Lun was still confused.

After so many introductions, he really couldn't remember much.

But no matter what, if Yan Lide says it’s okay, then it’s okay.

"I have written down all these methods. I will go to the palace now to talk to His Majesty, and then I will talk to you about what to do next!"

"Okay, I've introduced the method, and we'll handle it in detail."

Yan Lide finally said.

"Okay, I'll go back to the palace now!" After Duan Lun finished speaking, he went to the palace.

But not long after he went to the palace, he came back again.

Yan Lide was puzzled.

"Duan Lun, why are you back again?"

"Yan Lide, I think it's better to go into the palace with you and talk to His Majesty. Otherwise, I'm afraid that His Majesty won't agree with what I say, or that I won't be able to explain some professional knowledge clearly."

Duan Lun said so.

That's because I'm afraid that I won't be able to explain it at that time and I'll have to run away again. It's better to let Yan Lide enter the palace together.

In this case, you can also save a lot of time.

It can also make things move forward more quickly.

"Okay, let's get together then!"

So, the two of them headed towards Tai Chi Palace.

When they arrived at Tai Chi Palace, the two of them talked to Li Shimin about how to build a bridge.

Li Shimin was very happy after hearing this.

So, I asked: "How much does this bridge cost?"

"Your Majesty, one hundred miles, two billion taels of silver!"

"What?"

Li Shimin was shocked. He didn't expect the cost to be so high.

And this is just the cost. If Shengtang Group is allowed to build it, it will still have to cost more. Otherwise, who will do the unprofitable thing.

"Because the risk factor involved is also extremely high, the cost cannot be reduced, and a lot of transportation costs have to be eliminated."

Yan Lide said again.

"Not only the construction cost, but also the cost of exploration and design. I haven't calculated these yet, but they will definitely not be too small."

In this way, it is really quite a lot.

After Li Shimin heard this, he was silent for a long time.

"Someone, let Dai Zhou enter the palace!"
To be continued...