Chapter 1605: Cleaning up the zombies in the lake

In the blink of an eye, ten days passed.

During this period, Dongfeng took a transport fleet to the chemical plant in the north of Tong City and Nanfang Paradise, transporting it back and forth five times.

It took half a month before and after,

Finally, the destroyer and the equipment and raw materials in the chemical plant were transported back to the trading market.

Wires and cables that can be removed from the destroyer, electronic instruments and equipment that may be repaired, close-in defense guns, and all weapons in the destroyer's ammunition warehouse, etc.

All moved to the transportation warehouse area in the southern area of ​​the trading market.

also.

Regarding one of the recent important projects, the construction of waterworks has also progressed to a critical node.

After ten days of hard work in digging the ditch outside the water plant, it was finally time to open it.

From Nam Van Lake to the trading market, it is ten kilometers. The excavators excavated at a speed of one kilometer every day. When the excavation reached five kilometers, they began to level the ditch and build the ditch channel with bricks and cement.

They are digging and building at the same time.

The sun is very strong these days, so it takes less than two days for the cement to dry and become solid.

Trading bazaar.

Southern District.

Xie Changshan looked at the water plant under construction. In the past ten days, the construction engineering team had worked in two shifts.

No matter it was day or night, the construction site never stopped and construction continued.

Generally speaking, the number of pools required in a water plant varies from plant to plant, and usually includes at least one raw pool, one sedimentation tank, one filter tank and one clear water tank.

Depending on treatment capacity, additional pools may be required.

The one they designed can meet the water needs of 150,000 people. It is a medium-sized water plant and requires eight to twelve pools.

These include:

Raw water tank: used to store raw water extracted from water sources.

Sedimentation tank: After adding coagulant to the raw water, suspended solids and impurities in the water are removed through sedimentation.

Disinfection pool: Add disinfectant to the water to disinfect and sterilize.

Filter pool: further remove fine particles from the water and improve water quality.

Clean water tank: stores the treated clean water, waiting to be delivered to users.

According to the needs of the trading market, 10 pools were set up.

All ten pools need to be excavated, and after the excavation, the bottom and side walls of the main pool need to be poured to ensure the structural stability and waterproofing of the pool.

The cement structure is stable and waterproof.

In the past ten days, after working around the clock, 5 pools have been excavated, and some pools have begun to be stabilized with cement.

At the same time, in order to prevent the pool from being affected by natural disasters, they also built a greenhouse on it.

"Chief Engineer Xie, Liu Yu sent a message that the ditch is about to be opened, and those workers are being sent back now." Ding Wu, who was in charge of building the trading market factory, said to Xie Changshan.

"good."

Xie Changshan's eyes lit up. According to the prediction of the process, it would be completed today. He had already found Director Luo of the Operations Department two days ago and asked him to provide fire support at that time.

The end of the world is different from before. There are a lot of zombies in the lake. When they fetch water, they make too much noise, which is very likely to attract the attention of the zombies in the lake.

Although there are people from the Civil Armed Services Department watching now, he doesn't feel safe yet.

You must know that the entire Nanwan Lake covers an area of ​​nearly 75 square kilometers, with a total storage capacity of 1.63 billion cubic meters. Such a large amount of water will definitely attract a large number of zombies around it.

They must be fully prepared, otherwise they would not dare to blindly construct.

"What's the progress of the disinfectants and coagulants at the headquarters?" Jie Changshan turned to Ding Wu and asked.

Ding Wu opened his mouth and replied:

"The coagulant used for precipitation is fine and has been produced in batches. However, the disinfectant was only officially put into large-scale production yesterday. It is expected that it will take a week to produce enough disinfectant."

Disinfectants in waterworks during the apocalypse are not the same as those used before the apocalypse.

This water has been soaked by zombies, and there are many viruses in it. People who drink it will suffer from diarrhea and fever, and in severe cases, they will lose consciousness and die.

Fortunately, over the years in the base, the Zombie Research Institute has conducted relatively in-depth research on zombies.

Through the joint cooperation between the chemical factory and the Zombie Research Institute, a disinfectant that can maximize the purification of water sources was developed in a short period of time.

"One week is not enough time." Xie Changshan nodded.

The drought problem is worse now than it was ten days ago.

The river south of the trading market has completely dried up. Now the engineering buildings in the trading market all rely on the water in the previous reservoir to prevent them from shutting down.

If the water plant is not built in a while, the construction sites in the trading market will have to stop work due to water shortage.

and.

This is just a problem at the trading bazaar construction site.

Outside, long periods of sun exposure and dry weather caused several forest fires.

Just three days ago, they could see thick smoke in the distance in the trading market. If the wind was not in the opposite direction, the ashes from the fire there would probably be blown to the trading market.

Some of the vegetation on the roadside has dried up and died, and the death of the plants has also affected the survivors.

They cannot find wild vegetables or edible fruits just by searching in the mountains and forests as they could two or three months ago.

After all, the thunderstorm and natural disaster had just passed at that time, and mushrooms were everywhere in the forest.

Now, as drought continues and plants die, it becomes increasingly difficult for them to find food in the mountains and forests.

For them, drinking water outside the trading bazaar has also become a problem.

Mountain spring water is hard to find.

You can only get water from low-lying areas and boil it for drinking.

But zombies like water. Generally, in places with a lot of water, there are more zombies.

They always risk their lives to collect water, and they are frightened every time they collect water.

It's a bit like the dry season in Africa in the animal world,

Some herbivores come to the depression lake to drink water, and they always have to be careful, because if you are not careful, one or even several crocodiles may jump out of the water and drag them into the water.

The current situation is very similar to the scene in the animal world.

Jie Changshan took a deep breath, walked to a small electric donkey, turned to Ding Wu and said, "I'll leave the factory to you. I'm going to find Captain Ding."

"Okay." Ding Wu watched Xie Changshan drive away on the electric donkey.

Xie Changshan drove a small electric donkey from the trading market to the oil city.

Ding Meng was found in the security room.

"Captain Ding."

Jie Changshan saw Ding Meng looking at the monitoring screen and continued:

"Director Luo should have told you that he needs your support in the past two days. Can we leave now?"

Ding Meng turned his head and saw Jie Changshan, stood up and said:

"Okay, Luo Chu told me to give me ten minutes to inform everyone, and we can set off in ten minutes."

"Okay, okay." Xie Changshan nodded extremely politely.

I was secretly stunned, ten minutes was so fast!

It is worthy of being the first brigade of the combat department.

Although Ding Meng is only a team captain, he is extremely valuable as a team leader.

The battle is in the battle sequence of the forces at Da Zhangshu Base, which means it belongs to the core battle sequence.

The combat personnel in the operations department are basically veterans brought by Lao Qin, Ju Tianrui, Xiao Jun, Lao Luo, Lao Xie, and Lao Yi.

He has rich combat experience and relatively high overall quality.

Moreover, Ding Meng joined the Da Zhangshu Base much earlier than Xie Changshan.

Therefore, Jie Changshan's attitude towards Ding Meng was very respectful.

In this apocalyptic world where whoever has the biggest fist is the boss, this is the case.

Ding Meng picked up the walkie-talkie and quickly issued an order: "Sun Bing, notify the entire team to prepare for battle!"

After saying that, he hurriedly walked out the door. As if remembering something, he turned his head and said to Jie Changshan:

"Jie Gong, you go to the gate of Oil City and wait for us. I'm going to report to Director Luo."

"OK."

Drop-off--

Less than three minutes after Sun Bing blew the whistle, a group of people wearing black combat uniforms came crashing down from the building.

Crunch!

Trucks, armored vehicles, and explosion-proof vehicles drove from the garage and stopped in front of everyone.

These combatants stood neatly. After Sun Bing glanced at it, he shouted:

"Get in the car!"

Combat Elite No. 200 walked to the car in an orderly manner.

There are 24 vehicles in total, including four armored vehicles, four explosion-proof vehicles, and 16 troop-carrying trucks.

In the previous battles, they had already fixed their respective positions, and each person's responsibility was very clear.

Sun Bing watched them get into the car, then picked up the walkie-talkie and contacted Ding Meng.

"Captain, we are in position and ready to go."

Ding Meng, who was reporting back from Lao Luo at this time, glanced at his watch after receiving the news from Sun Bing.

It took less than eight minutes from the time he informed Sun Bing until he was ready.

good.

"Meet me at the gate of Oil City."

"yes."

After a few minutes.

The convoy gathered at the gate of Oil City, picked up Ding Meng and Xie Changshan, and drove to the west gate of the trading market.

As a combat unit, they don't need to go out from the main entrance of the trading market.

No queuing, no checking, no blocking.

Before they were about to go out, the person in charge of city defense had received a notice to leave the city in advance.

When the convoy arrived at the west gate, Luo Gui, the person in charge of city defense on duty at the trading market, immediately asked someone to open the west gate.

Boom boom boom——

The convoy drove out of the trading market with a bang.

This was the first time that Xie Changshan followed the combat brigade out. Looking at the orderly and disciplined combat brigade, he couldn't help but marvel, he was worthy of being from the combat department!

It's just better than the civil and military ones!

After the motorcade left the trading market, it headed towards Nan Van Lake.

Ding Meng was in the car, looked at Jie Changshan and asked:

"Confirm the task arrangement. Our task is to protect the construction team working on the lake and prevent zombies in the lake from coming ashore to attack the construction team, right?"

Xie Changshan nodded and said: "Yes, there are also people from the Civil and Military Affairs Department on the construction site who can help."

"Which brigade are you from?" Ding Meng asked.

Jie Changshan quickly replied: "The Ninth Brigade, the captain is Xia Liangfeng."

"Oh, I see."

"There may be a lot of zombies coming out of the lake later. What are you going to do?" Ding Meng asked.

Although his order was to protect the construction team, he had to know the details of how long the construction team would need to carry out the work.

Xie Changshan took out a pen and paper and drew a zigzag shape of a lake.

"This is Nam Van Lake."

Then I drew another line on the paper.

"This is the diversion ditch we dug."

Then draw a square at the end of that line.

"This is our oil city and trading bazaar."

He pointed at Nanwan Lake and said, "Our goal is to introduce the water from Nanwan Lake into the trading market for treatment and turn it into usable water."

"On the Nam Van Lake side, in order to ensure that water is introduced into the trading market, we need to build a small pier at Nam Van Lake and install iron fences to prevent zombies from flowing into our ditches with the water."

As he spoke, he drew a demonstration on paper.

"Although now the lake water can flow into the ditch naturally by relying on the height difference, but if the drought continues, the lake water level will drop, and the lake water level will be lower than the ditch position and it will not be able to flow in naturally."

"So we have to build a small concrete building on the pier. Once the water level drops to the point where it cannot flow by itself, we will use a water pump to pump water and introduce it into the ditch."

Ding Meng didn't understand some professional terms, but he almost understood Xie Changshan's thoughts.

"How long will the entire project take?"

Jie Changshan opened his mouth and replied:

“We used the caisson method and the cofferdam method to construct the pier.”

"The pier is planned to be 20 meters in length, 10 meters in width, and has an average depth of 7 meters. We have already prepared the caisson and can use it directly for construction. The columns used in this type of caisson are usually hollow-bottomed cylinders."

Jie Changshan was afraid that Ding Meng wouldn't understand, so he continued to draw on the drawings to demonstrate.

"It's just that. You can think of it as a box, a hollow concrete box with sand and gravel inside, then put it into the water and sink to the bottom. Step by step, piece it together to form a good foundation until it emerges from the water."

"The cofferdam method is to put these boxes at the end points on both sides, drain the water in the middle, and then fill them with sand, gravel and soil. That's it."

"I understand what you said, so how long will it take?" Ding Meng asked, rubbing his eyebrows.

"This project is not big, it will take about half a day."

"Then you said you want to build a building on the pier. How long will it take?"

"It won't take long. That building is used to house water pumps and distribution rooms. It's very small. The weather is so hot now and the cement dries quickly. It can be completed in two or three days."

"Two or three days." Ding Meng had a headache.

According to his original idea, he would directly send people to guard around the construction site and kill the zombies when they approached.

But now the project will last for two or three days. With such a big movement, the zombies in the lake will definitely come running over.

It doesn't matter if a few zombies die in the lake;

If a large number of zombies are killed and soaked in the lake,

If you think about it carefully, if the drought continues to a certain extent,

If the well water and underground water are gone, they may have to drink the water as a last resort, which is very awkward if you think about it.

Nowadays, in oil cities and trading bazaars, domestic drinking water comes from groundwater and rainwater from reservoirs.

The water used for construction at the construction site is not so particular. It is all water brought from the river outside.

However, in the future, we may need to build a wall outside the trading market and start large-scale planting, which will require relatively clean water to be used as agricultural water.

Therefore, when building a water plant, preparations must be made in advance to get it done in one step.

After thinking for a long time, Ding Meng gave his thoughts:

"Let's do this. I think it's better to lure the zombies in the lake to other places as much as possible, and your construction team will enter again."

"Of course, when your construction team comes in for construction, I will also send people around to protect the construction team."

"What do you think of this?"

Jie Changshan pondered for a long time,

"I don't know anything else except engineering and construction. How to deal with zombies is up to you!"

"Okay, let's implement this plan!" Ding Meng finalized the action plan.

(Ask for monthly ticket)