Big camphor tree base.

The fourth outer city.

This outer city is the largest of the four outer cities in Dazhangshu Base.

Half of the area has been built with greenhouses and a spacious training ground.

In addition, during this six months, some underground oil depots were also built specifically to store oil.

There are many factories in the Da Zhangshu base, and oil is needed in many fields.

Song Min, Li Yuan, Guifei, Wang Chunqi and others came here with transport trucks.

The tanker truck pumps the oil out of the tank and transfers it to the underground oil depot.

Except for the dozen or so tank trucks, all other oil is packed in oil barrels.

They're going to dump the oil out of every barrel.

Because the quantity of these oil barrels is limited, they must be used repeatedly.

Blockades have been set up near underground oil depots, and the use of fireworks and other preventive measures are prohibited.

The Fourth Outer City Underground Oil Depot stores more than 30,000 tons of oil, which is the largest amount of oil stored in the entire Da Zhangshu Base.

Every time oil is pumped, approval is required and inspection is required before entry.

.......

The first outer city.

After meeting Zuo Ruxue and Xiao Hu, Li Yu entered the administrative building to find his second uncle.

"Second Uncle, from now on, the gate of the buffer city of Dazhangshu Base will be completely closed. No one can go out or go in!"

The second uncle also knew that Zuo Ruxue and the others had just returned, so he nodded and said:

"Well, I have told Yu Lei in advance that the gate of the buffer city is closed and locked, and no one can enter from behind."

Li Yu took a long breath and said, "Okay, let's wait for this blizzard to see when it comes..."

...........

As of now, all those who went on missions at the Da Zhangshu Base Headquarters have returned home.

The Northern Territory has been stationed at the base and will not go out. Even if the surrounding survivors pass by, the Northern Territory will not accept them, but will give them an address and let them go to Oil City to look for opportunities.

Oil City is developing rapidly, but it also bears the greatest pressure.

The northern border is positioned as a grain production area, and there are relatively few troops stationed there. Therefore, in order to minimize the pressure on management, no outside population is accepted.

Although new survivors have joined the headquarters base, it has not received as much publicity as Oil City, so there are fewer survivors flowing in every day.

Oil City is still building a buffer city wall. The buffer city wall has sealed three gates, and now only the last gate is left unsealed.

In addition, there are several staff stationed at lakes and reservoirs to collect water, and they have not been withdrawn yet.

However, the distance between the water source and the oil city is only ten kilometers, and it takes only ten minutes to drive back.

At present, the water used in the trading market and the oil city is mainly water transported from the lake.

Although the temperature has now reached near zero, water can still be transported normally.

Instead of using above-ground trench transportation, they dug underground trenches and covered them with cement and various insulation materials.

One of the reasons is to prevent low-temperature freezing and freezing of running water, making it impossible to transport it to the trading market.

The construction method of underground pipelines is much more complicated than the construction of above-ground trenches.

For above-ground water canals, it is only necessary to dig the ground and open up the link between the trading market and Nanhuwan Reservoir.

However, underground pipes must be laid with cement and bricks to fix the soil on both sides to prevent water from penetrating. They must also be covered with insulation materials and capped. The process is relatively cumbersome.

At the water source, they also try their best to introduce deep lake water.

The temperature of the deep lake water is relatively high and it is not easy to freeze.

However, there are limitations to doing this.

Once the temperature drops to dozens of degrees below zero, no amount of insulation will help, and the water channels will inevitably freeze.

Even the lake has frozen, no water can come out, and the ditches naturally have no water.

But by that time, the heavy snowfall will naturally become water for the trading market.

However, the snow water cannot be used directly and must be heated, so a boiler factory is used to help heat the snow water.

Moreover, what flows in the heating pipe itself is hot water. The working principle of the heating pipe is to use the heat energy generated by the boiler to heat the heat medium flowing through the pipe, usually heat), and then transport it to the indoor radiator, such as a radiator, through the pipe to dissipate heat.

After the heat dissipation, the indoor air is heated, thereby achieving indoor heating.

However, the hot water in heating pipes cannot be used as domestic water. Chemicals are added to the water to prevent corrosion of pipes and valves, which is harmful to the human body.

Therefore, domestic water is connected to other pipes.

Oil City.

Uncle San and Lao Luo walked side by side on the wall of Oil City, looking at the wall of the trading market in the distance.

Lao Luo asked:

"Minister, when are we going to seal off the buffer city?"

The third uncle answered after a while:

"Wait a little longer. Many survivors came in today during the day. With the development of Da Zhangshu now, we have to plan for the future. Let's do our best to keep more people alive."

"But......"

After Lao Luo hesitated for a moment, he said with some concern:

"But now the population of the trading market has exceeded 230,000. If this continues, I'm worried about insufficient food."

The third uncle's eyes gradually became firm, he turned his head and asked Lao Luo:

"Do you know why the trading market can develop so fast and absorb so many people in a very short period of time?"

After thinking for a moment, Lao Luo said:

"Because we used the mission hall system and points system to attract survivors, give them ways to earn points and purchase food, allowing them to survive."

"In addition, these human resources help us build a trading market."

The third uncle nodded and said:

"This is just one of them."

"Secondly, why do they believe in us? Trust needs endorsement, and Oil City also needs promotion! In the previous thunderstorm disaster, tens of thousands of survivors came from outside. We survived the thunderstorm disaster, and they were completely integrated into the trading market.

Only then will they trust our points system. Points are invisible and intangible, but they can believe and hold them, isn’t it because we took them through thunderstorms and natural disasters?”

This chapter is not finished yet, please click on the next page to continue reading the exciting content! "The freezing natural disaster is a big challenge and a big opportunity. As long as we survive this freezing natural disaster, our oil city will become stronger."

development momentum.”

"Just like the last wave of thunderstorm natural disasters, once the natural disasters passed, the Oil City developed rapidly again!"

.......

After listening to his third uncle's words, Lao Luo could not calm down for a long time.

Just imagine, after the ice disaster, if a buffer city could be built, it would become as prosperous as a trading bazaar, with a population of hundreds of thousands.

this......

It is simply a medium-sized city.

"but...."

Lao Luo pursed his lips and said: "But now the trading market is overcrowded, and the population continues to increase like this. If the new people don't have food, they may riot..."

The third uncle smiled and said:

"So, this is why I want Xie Changshan to continue building the buffer city wall."

Lao Luo frowned and thought deeply about what the minister said.

"What do you mean?" Lao Luo thought for a while, but still didn't understand what the minister's solution was.

Third uncle explained:

"I consulted with Changshan whether construction can be done at minus ten degrees, and he said yes! It just needs to be more troublesome and slower."

"Even at minus 20 degrees, construction can still be done. You only need to add an appropriate amount of antifreeze to the concrete for pouring to prevent the moisture inside from freezing and increase the exit temperature of the concrete. At the same time, cover the surface with thermal insulation after construction.

materials for insulation.”

“In addition, we can also build insulation sheds to maintain the temperature of the construction units, so that construction can be carried out at sub-zero temperatures.”

After hearing Third Uncle's explanation, Lao Luo suddenly realized.

"I see!"

"You mean, continue to build?! Try to increase the height of the buffer city wall before the ice disaster, and then build a greenhouse in the buffer city and start planting!"
To be continued...