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February 17th.

There are still two days until rain.

Big camphor tree base.

The morning sun comes out very early.

The sun is shining brightly these days, and the temperature rises very quickly during the day.

During the hottest time of the day, it can reach 18 or 19 degrees Celsius.

And at night, it will return to only two or three degrees.

On the concrete floors in the inner and outer cities, the rice was still placed on it to be exposed to the sun.

Some people took wooden rakes and raked over the rice to rake out some of the rice.

After being exposed to the sun all afternoon and air-drying all night yesterday, there are basically no water stains on the cement floor.

If there are a few more sunny days, these grains can be dried.

In the inner city.

Li Yu is discussing with Xu Zhen about the core drainage outlet.

"How is the drainage system upgraded now?" Li Yu looked at Xu Zhen and asked.

Xu Zhen pointed to the inner and outer cities and said: "In the past two days, I have installed additional water pumps in places where water is prone to accumulate, so that the water can be discharged faster.

In addition, the height of open spaces around warehouses and residential areas is lowered, which can effectively accommodate stagnant water and protect surrounding buildings. If the previous situation occurs again in the future, there will be no problem.

Now we only need to make some adjustments to the water outlet, expand the water outlet, and dredge the water channel, and then there will be no problem."

Li Yu looked at the deep drain and said, "What are you going to do?"

Xu Zhen thought for a while and said: "I went to see it yesterday. The iron railing at the drainage outlet outside the base had some sediment, leaves, stones and other things deposited on it, which blocked the outlet over time. It must be opened!"

Li Yu frowned and said: "Open the railing. Although it is impossible for zombies to climb up the cliff now, what if the water level below the cliff rises? During the dry season, I don't think that place is safe if there is no obstruction.

In short, no matter what, there must be an iron railing over there for protection."

Xu Zhen was a little helpless. The drainage outlet of the Da Zhangshu base was on a cliff, and the top of the cliff was a full 79 meters above the ground.

The water outlet they built is at a height of 72 meters.

The snow has melted in the past few days, and the water level under the cliff has risen to nearly 20 meters, forming a small lake.

Below the cliff is a depression, which is more than 40 meters shorter than the mountain forest next to it. However, at such a high location, if the water level under the cliff can reach this high, then the outside of the front door of the Da Zhangshu base will probably be flooded up to two meters.

It's three meters high.

The Da Zhangshu base is not at the same altitude. The side near the cliff is shorter and the side near the gate is higher.

The height difference between the highest location and the lowest altitude can reach 7 meters.

It is precisely for this reason that the drainage outlet in the base was chosen on the cliff side, which can save construction costs by adapting measures to local conditions.

Hearing Li Yu's determination, Xu Zhen really wanted to say that unless there was a terrible flood that only happened once in a thousand years, it was absolutely impossible that the other side of the cliff would be flooded to such a high height.

But he didn't dare.

Li Yu has told him twice, and he has also told Li Yu all the possibilities. Li Yu clearly expressed that he knew, but still persisted.

Xu Zhen could only frown and think hard.

Li Yu was not in a hurry and quietly watched him come up with a solution.

He didn't know how high the water would be flooded after heavy rains in the next few days, but he knew that he had to do his best to take all the protection, and the more he did, the better.

Even if the terrain at Da Zhangshu Base is relatively high and it is not flooded afterwards, what if it happens?

He doesn't dare to gamble!

Li Yu has been staying here, staring at Xu Zhen and trying to figure out a solution.

Under this terrifying pressure, Xu Zhen had a flash of inspiration.

Got it!

"I have an idea, Mr. Li. Based on your needs, I think we can bury a hidden line to control the outlet railing on the cliff side, use waterproof and insulated line materials underground, and use steel pipes on the surface of the line.

Material protection to prevent extrusion and compression.

Then, at the location of the drainage outlet, we can use waterproof material to make a switch and connect it to the base through lines, so that we can control the opening and closing of the iron fence in the base.

In addition, we can even install some cameras next to the drainage outlet, so that we can see the drainage outlet at any time. If there is sedimentation and obstruction of the drainage outlet, we will open the railing and close it after it is clear!"

Xu Zhen took a breath and hurriedly finished the flash of inspiration in her mind, fearing that she would forget it later.

Next to the two of them, Lao Lu heard the idea, thought about it for a moment, and asked: "As far as I know, there is a distance of dozens or hundreds of meters from the base wall to the edge of the cliff, and under the wall,

The foundation is completely sealed with concrete and poured to a depth of more than ten meters. If you want to lead a line there, you have to go through the drainage outlet.

Either we have to go above ground, which means we have to break through a five- to six-meter-wide wall. Of course, it’s the same underground. I feel like the construction is not a very simple task.”

Li Yu thought for a while and said: "There is no need to open another hole. Just run the line directly from the drainage outlet, make sure it is stable, and walk against the top of the drainage outlet hole. Xu Zhen, can this be done?"

Xu Zhen looked at the wellhead with a diameter of more than two meters and the flowing water inside. After thinking for a few seconds, she said: "No problem. Mr. Li, as long as the waterproof material and the door that controls the iron railing can be fixed, there will be no problem."

question."

"Okay!" Li Yu said with satisfaction.

Then let Li Hang and Ding Jiu come over.

Ding Jiu has been a contractor before, so he is very familiar with many building materials, and naturally knows how to make them and whether they can be made.

After hearing Li Yu's needs, Ding Jiu nodded slightly and said: "I have done this before. I took on a weird project before, which was to install some gorgeous lights at the bottom of the swimming pool. His pool has water all year round, and the lights installed below

, it has never been broken. It can be fixed, but I need someone to make the control system for opening and closing the door."

This chapter is not over yet, please click on the next page to continue reading! Li Hang studied mechanical and electrical maintenance in college, so he is naturally involved in this area.

He opened his mouth and said: "Okay, brother, I will ask He Bing and Zhou Ran to work on this system together later. It won't be a big problem."

Seeing the three of them solving the problem while chatting, Li Yu felt slightly relaxed.

Then he said to the three of them: "Okay, then you start taking action now, Xiaohang, on your side, go and fix the iron fence and control system now."

Li Hang asked: "Do you want to modify the original iron fence?"

Li Yu thought of the iron fence he made before. It had been used for two years. He didn't think much about it when he built the base. Now it's a little rusty.

So he said: "To make it again, my requirements are that it is waterproof and not easy to rust, and it must be stronger and more stable. Otherwise, if we press open in the base, the iron fence will not move at all, and we will be in trouble!"

Li Hang said seriously: "Okay, when will it be used?"

Li Yu glanced at Xu Zhen and said, "The sooner the better, tonight at the latest."

"In such a hurry?" Li Hang said in surprise.

He didn't understand why he had to be in such a hurry to do this.

Naturally, Li Yu would not explain to him that there would be heavy rains in the future, the dam would be submerged, and floods would come over.

So he explained: "This long-term snowstorm and the waterlogging caused by melting snow did not cause any damage, but it showed very big problems.

If there is a problem, we must solve it immediately without delay!"

To put it this way, it is in line with Li Yu's vigorous and resolute style and personality.

After calculating the time, Li Hang said: "It's a bit difficult. After all, it's not an iron railing. We also need to fix the wiring and waterproofing and heat insulation. We have the materials, but we don't have enough manpower. It's definitely not enough for just the three of us. We need more people."

"

Li Yu thought for a while, thinking about which manpower would be more suitable.

At this time, Ding Jiu said: "Mr. Li, Lao Zhou was a mechanic before. When I built a greenhouse last time, I felt that he was very professional."

When Ding Jiu said this, Li Yu suddenly remembered Uncle Qin and the others from the previous lathe factory.

So he said: "Okay, Lao Zhou, and ask Uncle Qin and the others to come over and help you."

There are more than 30 people in Lao Qin's group, all of whom have been transferred from the military. They used to work in a state-owned lathe factory, so there should be no problem in doing this.

Li Hang quickly said: "We don't need so many people, right? You can come here, it's faster. If they all come to help, it can be done in three hours, at most three hours."

Li Yu said happily: "OK, I will take a photo later, tell them about the situation here, and start working quickly."

"good."

After solving the problems with the iron railing control system and wiring, Li Yu said to Xu Zhen: "What now? Is there no problem?"

When Xu Zhen saw that Li Yu was so forceful and asked someone to solve the problem, she naturally nodded and said, "No problem."

"Okay, let's go over and remove this iron railing now, and then clean up all the sand and leaves inside." Li Yu said.

Lao Lu quickly said: "Mr. Li, please don't go in. Just let me and Lao Xu go."

Li Yu did not refuse and asked Xu Zhen to enter the inner city. In addition to his previous contributions, he was also asked to take charge of the drainage problem. He would definitely be the first to go.

You can't always be at the forefront of everything.

So he said: "Okay, let's act quickly now."

When Xu Zhen and Lao Lu heard this, they immediately changed their clothes, took tools and flashlights, and tied ropes around their bodies, and slowly went down to the drainage outlet.

The drainage outlets in the base will all converge into this square well, with culverts connecting everywhere underneath.

It was about seven or eight meters deep from the ground, and iron frames were set up on the walls of the well for them to climb down.

The current snow water has basically been drained out, so the water in the well is now very shallow, and they can go down without wearing oxygen bottles.
To be continued...