"What's going on?"

"The swallow's nest fault bursts into mud and water. ”

"That's not that exaggerated, is it?"

"It's working normally. ”

"Lean ......"

Zhou Yulang simply couldn't imagine it.

The whole cave entrance is completely an ocean.

No, not Wangyang.

It's a piece of mud.

It's almost like a mudslide.

"Then what now?" Cheng Kailong asked calmly.

"It's fine. We're used to it. Go in as usual. Jiang Dong disagreed, "Do you want to take a break?"

"Don't. ”

"Then go inside. ”

Jiang Dong, Chen Yubin and others had almost no politeness.

They've been here for so long that they're almost out of touch with the outside world. In their opinion, there are no guests in the Gulan Mountain Tunnel. Only the people who do the work.

All those who can't work, those who can't persevere, and those who feel that their future is hopeless have gone.

What is left is the backbone of the backbone, the bone of the bones.

Call a rubber raft.

Embarkation.

Keep going.

The mud gushing is on the outside of the cave entrance. That's a good thing.

After entering the hole, the mud gradually decreased, and gradually the water began to be clearer.

But the water is deep. It's almost knee-deep. Due to the squeezing and backfilling of the mud at the entrance of the tunnel, the water in the tunnel is also gradually rising.

All around, it's all water.

Muddy stagnant water.

That's still good. Keep going inside, the water is deeper.

It's normal to get to the thighs.

It is not possible for workers to walk in and out. You have to take a boat.

There is a constant spray of water on the surrounding walls, which is even more spectacular than the water spray of Kowloon, and it feels like a water curtain hole.

Workers brave water sprays on both sides to install reinforced steel frames.

Their bodies were sprayed with water, and they could barely see the figures.

Such a shot, if it is placed in a TV movie, is definitely a heroic picture of emergency rescue and disaster relief.

Here, however, it's a daily task. There is no dry time at all.

Orange life jackets hang on the walls.

There are also yellow lifebuoys.

According to the regulations, everyone entering the tunnel is required to wear a life jacket.

Ten years later, however, the workers have long since become numb. I'm too lazy to wear it. The managers are already numb and don't want to care.

"Come, one per person. Jiang Dong said.

"Do you need to exaggerate?" Zhou Yulang said.

"Yes. Technical manager Chen Yubin said expressionlessly.

Actually, it's not really expressionless. Rather, it was numb from torture.

He said that the tunnel excavation is a one-way project and is an anticline structure. There's a lot of standing water in it. Not wearing a life jacket is dangerous.

What is an anticline structure?

It's digging from the top down.

In general, it is most convenient to dig a tunnel from the bottom up.

Drainage.

In terms of transporting muck.

Even ventilation is relatively convenient.

It is also more conducive to heat dissipation.

The problem is, it's all the other way around.

Due to the special geographical structure, the Gulanshan Tunnel can only be constructed in the form of anticliqu.

The further down you dig, the more difficult it is to drain the water. More and more pumping machine relays are needed.

Transporting the muck outward has to climb the slope.

Poor ventilation. The longer the tunnel, the more difficult it is to ventilate.

Heat is also very susceptible to accumulation.

"The hardest part is drainage. Chen Yubin said.

"yes! There's too much water. Jiang Dong said with a wry smile.

Reverse slope construction, drainage is already difficult.

All the bubbling water has to rely on the pump to pump the water.

However, the power of the pump is limited, and the range is limited.

As the tunnel progresses, the pumps have to be relayed layer by layer.

In the beginning, it was a three-level relay, and later it was a four-class, five-class, seven-class, ten-level ......

What level is it now?

It's fifteen levels.

A batch of pumps had to be replaced every month.

The power of the water pump has to be very high. If it's a general water pump, it's not used at all.

Now the tunnel is covered by stagnant water, so there is no pumping to see. Otherwise, the water sprayed out of the drain pipe can splash three or four meters away.

In order to pump water, special pipelines had to be built. Otherwise, the stagnant water will not be drained at all.

How many aquifers are there in the entire Gulan Mountain Tunnel?

According to the survey it was twelve.

So far, ten have been opened.

However, no one can say when another one will pop up.

In the original geographical survey, there was a large error. When the project started, I couldn't imagine that it would be so difficult.

Every aquefer is a ghost gate.

A faulted water layer can make it difficult for you to move an inch for two years.

The most exaggerated thing is that in the full 26 months, only 156 meters were excavated. Almost all of the time is spent on emergency rescue.

The most proud thing is that since the start of the project, there have been no casualties for the time being.

Now is the time to ride a tiger.

Abandon?

That's impossible.

No matter what the cost, it has to be done.

No matter how much manpower, material and financial resources are needed.

It doesn't matter how long it takes.

This is the decision of the superiors.

It is also the firm belief of all builders.

"Do you think it's hot?" Jiang Dong said casually, "I'm getting used to it slowly." ”

"It's hot, and I'm still holding my breath. Zhou Yulang complained bitterly.

Not only is it hot, but it's also very humid.

There is water everywhere, can it not be wet?

The result is hot and humid, just like a sauna. Suffocated. Everyone was sweating profusely.

Wang Buyan looked at the wet thermometer on the wall.

Good guy, the temperature is 36, the humidity is 91, and it's really a big steamer!

This is the first half of the tunnel!

If it's inside, it's definitely more exaggerated.

Purely in terms of space, the tunnel is actually very large. The width is about 30 meters, and the height is about 12 meters.

It stands to reason that such a tunnel will not give people a feeling of oppression.

However, it feels very depressing.

A rubber raft drove over.

Tired workers sat on it.

They were wet and their eyes were blank.

Many people lie exhausted and feel like they don't even have the strength to breathe.

"Tired. Jiang Dong smiled bitterly.

"How long are the working hours?" Zhou Yulang frowned.

"Just two hours. ”

"That's it for two hours?"

"Why don't you try?"

"I ......"

Zhou Yulang obediently shut up.

With such a harsh construction environment, he has never seen or heard of it. It's hard to even imagine.

It seems that the engineering case of Jiaotong University is never mentioned.

This is the case with the national conditions. Definitely won't mention it.

We'll only mention when we're most proud.

The construction period of the Gulanshan Tunnel has been delayed again and again, from three years to five years, ten years, and thirteen years...... It's not very good.

The raft slowly drove into the tunnel.

It's stuffy.

It's hot.

Lots of water.

The water on the ground is getting deeper and deeper.

There are still a lot of spouts on the walls around it.

It doesn't feel like you're in the mountains.

It feels like you're underwater.

All construction must be carried out in water.

Drilling.

Install the steel frame.

Transport of muck.

The most exaggerated is pouring concrete.

It's not called watering.

It's called jetting.

The concrete is sprayed and immediately washed away by the water.

There is as much as there is left. Spray layer by layer. Spray until there is no water. Spray until it solidifies. Spray until the strength is acceptable.

Here, the cost really doesn't mean much.

As long as the technology is usable, all of them are used.

Almost all construction machinery is specially made. Otherwise, it will not work at all.

The first thing to do is to prevent leakage.

There is water everywhere. Once the electricity leaks, the consequences are unimaginable.

"Drainage is our biggest problem right now. Chen Yubin said, "If it is a normal water gush, it can still be treated." If it's a sudden big water gush, it's troublesome. Not only is the follow-up hand tail very long, but it is also dangerous. Someone else builds a tunnel, and 90% of the time is spent working. When we build a tunnel, we spend 90% of our time dealing with dangerous situations. ”

"yes! Most of our energy is spent on emergency rescue. Jiang Dong said with a wry smile, "Of the 30 days last month, 26 days were used to clear risks. In the remaining four days, a total of 127 meters were excavated. That's a good score. Hopefully it will be kept up in the future. ”

"Where did so much water come from?" asked Zhou Yulang curiously.

"I don't know. There is no accurate inspection report. Chen Yubin said with a wry smile, "It is estimated that it will not be able to be detected." ”

Jiang Dong then briefly introduced the situation.

Gulan Mountain, with a special geographical location, is located in the area where three rivers flow together.

What does it mean that three rivers flow together?

That is, the Nu River, the Lancang River, and the Jinsha River flow in parallel with each other, but they absolutely do not cross or merge.

Next to it is the rushing Lancang River.

The water discharged from the tunnel falls into the Lancang River.

If you look at it from the outside, you can see a very high, very spectacular waterfall, which is the water flowing out of the tunnel.

People who don't know the details think it's a natural landscape.

Only those who know the details will smile bitterly. This special code is completely digging an underground river!

Where does the water come from?

It must have come from heaven.

The annual rainfall in the Hengduan Mountains is also very large, and the groundwater is very abundant.

The rain alone is enough for Gulan Mountain to absorb.

Many academicians of the Academy of Sciences and the Academy of Engineering have come to study it, and there is no good solution.

At present, we still have to rely on pumping machines to try to drain water outward.

Due to the very large amount of water drain and the need for many layers of relay, the effect is always unsatisfactory.

After about three or four kilometers of progress, I saw a lot of workers working.

All of them work in the water.

The bubbling water is exaggerated and feels like a waterfall.

Workers who are a little thinner are expected to be washed away.

If a thumb-sized heavy screw falls on the ground, it can easily be washed out by the water flow for more than ten meters.

If a smaller part is lost, then ...... Huh.

It's hard to get it back.

The stagnant water is all cloudy and cannot be seen clearly. You can only touch it by hand.

From time to time, forklifts with very high chassis carry large quantities of ice.

This is used for cooling.

Because the temperature was too high, it was difficult to cool down, and a large amount of ice had to be transported in from outside.

The size of those ice cubes is very large. Each weighs more than a ton. If it's in a normal environment outside, it takes at least five or six hours to melt it all. However, inside the tunnel, a ton of ice melts in just two hours.

The wet thermometer on the wall shows that the temperature in the middle of the tunnel has reached more than 39 degrees.

It's a temperature that can suffocate and cause heat stroke.

Today's first watch is here. Today, Sunday, let's have a little explosion. Six chapters are updated today. Ask for a little referral vote. Thank you.