Chapter 982: Do you want to blow up the dam?
"A trench is excavated in the original soil below the elevation of the auxiliary dam bottom, and grouting is carried out. The lower edge of the geomembrane is placed in it and covered with soil to isolate water from entering. At the same time, the smoothness of the auxiliary dam body is improved after grouting, which is conducive to the geomembrane to seal the water from the lower edge by gravity. The trench is slightly V-shaped, and a water collection pool is set under the geomembrane at the top corner. A pumping pipe is passed under the geomembrane to pump out a small amount of infiltrated water at any time to ensure that there is no large amount of water accumulation under the geomembrane."

“What if the dam really overflows?”

"The geomembrane is covered to the backwater surface of the auxiliary dam. The geomembrane on the backwater surface and the geomembrane on the frontwater surface overlap at the dam top or the upper edge of the backwater surface, with the backwater membrane at the bottom and the frontwater membrane at the top. The overlap depth is deep enough to use water pressure to prevent the geomembrane on the backwater surface from being washed away by water."

Gao Zhendong thought about it without hesitation. Part of it was what he saw at his relative's house, but he made some modifications. After all, this was an emergency rescue and the conditions were not as good as those for formal construction. Geomembrane is one of the commonly used means of reservoir waterproofing, and its service life can even reach more than 30 years.

The other part is the changes in construction technology he made based on existing conditions, focusing on using whatever is available, such as polyurethane spraying.

As the question-and-answer session went on, the other comrades' eyes lit up, and Shuikou's leader slapped the table and said, "Great! That's great!"

This set of plans is closely linked. Under the existing conditions, we have really come up with an effective anti-seepage plan that can be completed within 2 days. As long as the auxiliary dam can survive these few days, everything will be easy.

Moreover, every step and every problem has a corresponding solution, and the principle of this solution is clear as soon as you hear it. You know it is useful without having to delve into it. This allows other comrades to basically not have to think too much when evaluating the effectiveness, and they can make a decision just by thinking about it in their heads.

Almost as soon as the question-and-answer process was over, the comrades finished evaluating the effectiveness of this plan. This is almost the most effective plan that can be thought of in the short term. There may be other plans that can be considered, but the advantage of this plan is that it has no impact or damage to the auxiliary dam body. Even if other solutions are thought of, they will not be affected by this plan.

It can be said that no matter whether there are other methods or not, this method can be used directly without worrying about other things. While the current water level is still a considerable distance away from the elevation of the bottom of the auxiliary dam, everything is still in time.

It’s a long story, but at this time, it had not been three minutes since Gao Zhendong raised his hand to express his opinion.

"I agree!"

"I agree!"

"agree!"

"..."

With admiration for this expert in pyrotechnics and metalworking, the comrades present raised their hands in agreement in unison.

Although I don't know how this comrade combined these two professions, his ability is really real. In just a short time, he came up with a complete set of feasible plans. Everyone here is capable, and this is a rescue operation, only ability is considered, nothing else.

The leader of the water conservancy department was very happy. Only three and a half minutes after the situation was introduced, the most urgent problem got a relatively safe solution, and he immediately gave an order.

"Notify the emergency command center and immediately organize a rescue team to dig a geomembrane fixing groove below the auxiliary dam bottom elevation. Contact nearby factories and immediately organize the provision of rivets and supporting tools. I will contact the troops immediately..."

Just when he got to this point, Gao Zhendong interrupted him: "Let me arrange this matter. I can do it faster. The main reason is that you don't know where to ask for things, so it's troublesome to verify. I will directly notify the relevant units through the National Defense Work Committee and arrange for air transportation."

The leader didn't care about being interrupted by Gao Zhendong. He was undoubtedly crazy for still thinking about this matter at this time. He stopped talking and looked at Gao Zhendong.

Gao Zhendong turned around and gave orders to a comrade who came with him, not the blasting expert.

"You should contact the National Defense Committee immediately and notify XXXX Factory to remove XXXX foaming ingredients when producing polyurethane foam. The other ingredients should remain unchanged. Switch production immediately without delay. Produce one batch and airlift another batch until we notify you to stop production."

I don’t know how much I’ll need, but let’s just get them all first.

"Yes!"

"At the same time, notify the Defense Work Committee and the army comrades, and notify the nearby automobile troops to immediately transport the spare automobile tarpaulins in stock here. Transport as many as you can. The total area cannot be less than 3000 square meters. The more the better."

In fact, if it is just the auxiliary dam, according to the length of the auxiliary dam of 150 meters and the height of 3 meters, even if both sides are filled up, the total coverage area is only about 2000 square meters. However, considering the issues of overlap, loss, etc., Gao Zhendong directly increased it by 50% and wait until it is used up.

At this point, he paused and added, "At the same time, notify the nearest logistics equipment factory that large pieces of canvas for the production of military tents are also available. Everything should be based on this place."

"Yes!"

The accompanying comrade saluted and turned to leave. He naturally had the relevant channels to accomplish these tasks. Before leaving the capital, the National Defense Committee had already given them sufficient authorization and support.

The comrades present looked at Gao Zhendong, somewhat surprised at what this "pyrotechnics expert" was like. However, considering his identity as a "pyrotechnics expert", it didn't seem strange that he could be directly connected with the troops.

The only special thing is that this comrade’s team is quite large.

"Good! Let us first thank our comrades in the army!" Seeing that Gao Zhendong had thought it through very carefully, the leaders of the water conservancy department took the lead in applauding. The military and the people are of one mind, and our soldiers will rush to rescue when there is danger and rescue when there is a disaster.

The comrades applauded briefly and enthusiastically, and then immediately returned to work. "Leader, I will go to the auxiliary dam to conduct an on-site survey and grasp the specific plans for the V-shaped grooves and geomembranes, so that the comrades can work more conveniently."

A hydraulic expert from the water conservancy system volunteered to help. This was necessary. The detailed plan provided by the top hydraulic experts was more feasible. There were more than one or two hydraulic experts here. Let's allocate some technical resources to implement the first plan.

"Okay, I'll leave this matter to you." The leader made the decision immediately. There was no time for nonsense.

The hydraulic engineer called the two colleagues who came with him and said, "You two, follow me!"

The three of them went out, found local comrades to cooperate, and went straight to the auxiliary dam.

At this time, it was only five minutes before Gao Zhendong started to propose the plan.

In ancient times, Cao Zhi could compose a poem in seven steps, and today an expert group can make a final decision based on five points.

The people in the room continued to work. The most urgent problem with the auxiliary dam had been temporarily solved, but the problem with the main dam, which was longer and higher, still existed. If the water could not get out from here, the danger would always exist.

"Let me first share my opinion on the main dam." Without any delay, Gao Zhendong immediately turned his attention to the main dam.

"You say!" The leader of Shuikou nodded immediately. To be honest, the reason for asking the Flood Control Committee for support from pyrotechnics and metalworking experts was originally because of the problem of the main dam.

"I just checked. Although the diversion tunnel is still there, it is simply not capable of discharging such a huge flow. My suggestion is to blast it!"

During the dam construction, different forms of construction diversion facilities will be built according to local conditions to be used for the normal diversion and discharge of river water. However, that is only limited to normal situations. Under the current abnormal circumstances, although the construction diversion tunnel of this dam has not been closed, it has lost its meaning.

"Explosion? Before the water accumulates, should we just blow up the main dam and release the water downwards to avoid the formation of a flood peak?" a comrade asked.

This is equivalent to releasing the water evenly so as to avoid forming a large flood peak. In this way, disaster relief work downstream will be easier.

In fact, this is why the water conservancy department asked for the support of pyrotechnic experts. If it doesn't work, just blast it open and cut the peak! Although the water is still the same, the loss will be smaller.

Before Gao Zhendong could answer, someone immediately objected: "No, the current flow of guest water plus runoff is not small, plus the reservoir capacity that has been blocked in the early stage, once it explodes, it will also be a large flood peak."

"But a short pain is worse than a long one. If the stalemate continues, the water will break through the main dam by itself, and then it will be completely out of control."

"There is some truth in this. You have to be willing to sacrifice as a last resort. Only by sacrificing can you gain. Relocate all the people downstream in advance and ensure their safety first."

"But the property losses will be huge, and once the water goes down, it will be difficult to eliminate evaporation in a short period of time, which will have a major impact on the upcoming spring farming!"

"Yes, it can't be blown up. It can't be blown up."

"We still need to maximize the reservoir's original storage capacity and try to control the water discharge within the normal range."

With the spillway and the bottom holes fully open, the river channel is still generally within the normal or tolerable range and will not cause a disaster.

Comrades were expressing their opinions, but Gao Zhendong shook his head: "No, I don't mean to blow up the dam, but to blow up the inspection gate that is now crushed by water!"

"Blow up the inspection gate? How is that possible? If you blow up the inspection gate, the section of the dam where the inspection gate is located will basically collapse. These bottom-hole inspection gates are at the bottom of the dam, and they are the highest section of the dam. Almost all the water in the reservoir will be released down. So it's better to blow up the auxiliary dam, where the water will be less."

A hydraulic expert immediately said that this method was absolutely not feasible, and other comrades also expressed their agreement with this view.

We have all seen blasting: with a loud bang, the earth shakes and rocks fly into the sky. What is the difference between blasting a bottom hole inspection gate and blasting a dam?

"Yes, yes, yes. It would be better to send someone behind the inspection gate to cut the inspection gate directly with cutting equipment."

"It would take a lot of time to cut such large gates, and what about the people who do the cutting?"

"That's right. It's dozens of meters from the inspection gate to the bottom hole exit. The comrades who cut it can't escape at all."

"This won't do. This won't do..."

Gao Zhendong raised his hand again, indicating that he had not finished speaking.

(End of this chapter)