Chapter 229: Gulan Mountain Tunnel

"what happened?"
"The swallow's nest fault bursts with mud and water."
"That's not so exaggerated?"
"It's normal work."
"by……"
Zhou Yulang is simply unimaginable.
The entire entrance of the cave is completely vast.
No, not Wang Yang.
It's a piece of mud.
It's almost the same as a mudslide.
"Then what should I do now?" Cheng Kailong asked calmly.
"It's okay. We are used to it. Go in as usual." Jiang Dong disapproved, "Do you want to take a break?"
"No."
"Then go in."
Jiang Dong, Chen Yubin and others have almost no polite meaning.
They have been here for too long, almost all of them are out of touch with the outside world. In their opinion, there are no guests in the Gulan Mountain Tunnel. Only people who work.
All those who can't work, those who can't persist, and those who feel hopeless have already gone.
What remains is the backbone of the backbone, the bones of the bones.
Call a rubber raft.
Aboard.
move on.
The mud and gushing water is outside the cave entrance. This is a good thing.
After entering the cave, the mud gradually reduced, and gradually clearer water began to appear.
But the stagnant water is deep. It's almost knee deep. Squeezed and poured by the mud at the entrance of the cave, the water accumulated in the tunnel gradually rises.
Looking around, everything is water.
Muddy standing water with mud.
This is still good. Keep going inside, the water gets deeper.
It's normal to reach the thigh.
Workers cannot walk in and out. Must take a boat.
The surrounding walls are constantly sprayed with water, which is even more spectacular than the water spray in Jiulong, and it feels like a water curtain hole.
Workers braved to spray water on both sides to install reinforced steel frames.
They were sprayed with water all over, and they could hardly see the figures.
Such a lens, if it is placed in a TV movie, is definitely a heroic picture of rescue and disaster relief.
However, here, it is a daily task. When it is not dry at all.
An orange life jacket hung on the wall.
There is also a yellow lifebuoy.
According to regulations, everyone entering the tunnel must wear a life jacket.
However, ten years have passed, and the workers have long been numb. I'm too lazy to wear it. The management staff are also numb and don't want to manage.
"Come on, one for each person." Jiang Dong said.
"Does it need to be so exaggerated?" Zhou Yulang said.
"Need." Technical manager Chen Yubin said blankly.
In fact, it's not really expressionless. It was tortured and numb.
He said that the tunnel excavation is a one-way project, a reverse structure. There is a lot of stagnant water inside. Not wearing a life jacket is dangerous.
What is the reverse structure?
Just dig from the top down.
Generally speaking, it is most convenient to dig the tunnel from the bottom up.
Drainage.
For the transportation of muck.
It is relatively convenient to connect to the wind.
It is also more conducive to heat removal.
The problem is that all of this is reversed.
Due to the special geographical structure, the Gulanshan Tunnel can only be constructed by using a reverse slope.
The more you dig down, the more difficult it is to drain. More and more pump relays are needed.
Transporting the muck out has to climb a slope.
Poor ventilation. The longer the tunnel, the more difficult it is to ventilate.
Heat is also very easy to accumulate.
"The most difficult thing is to drain." Chen Yubin said.
"Yes! There is too much water." Jiang Dong said with a wry smile.
In reverse construction, drainage is inherently difficult.
All the water coming out depends on the pump.
However, the power of the water pump is limited, and the range of action is limited.
As the tunnel deepens, the pumps must be relayed layer by layer.
At the beginning, it was a three-level relay, and then it was four-level, five-level, seven-level, ten-level...
What level is it now?
Fifteenth level.
A batch of water pumps must be replaced every month.
The power of the pump is still very large. If it is a general water pump, it is not suitable at all.
Now the tunnel is covered by stagnant water, and there is no appearance of pumping water. Otherwise, the water jet from the drain pipe can splash three or four meters away.
In order to pump water, special pipelines have to be built. Otherwise, the stagnant water cannot be discharged at all.
How many faults are there in the entire Gulanshan Tunnel?
According to the survey, there are twelve.
Ten have been opened up.
However, no one can tell when another one will pop up.
In the original geographic survey, there were large errors. When the project started, I never imagined that the construction would be so difficult.
Every faulty layer is a ghost gate.
A faulty layer can make it difficult for you to move in two years.
The most exaggerated is that only 156 meters have been drilled in a full 26 months. Almost all the time is spent on rescue.
The most proud thing is that there have been no casualties since the start of the project.
Now is the time to ride a tiger.
give up?
That is impossible.
No matter how big the price is, it must be opened up.
No matter how much human, material and financial resources are needed.
No matter how long it takes.
This is the decision of the superior.
It is also the firm belief of all builders.
"Do you feel hot?" Jiang Dong said casually, "Slowly get used to it."
"It's hot and holding your breath." Zhou Yulang cried.
Not only is it hot, it is also very humid.
There is water everywhere, can it be wet?
The result of sultry heat and humidity is just like a sauna. Hold back badly. Everyone is sweating profusely.
Wang Bu'an looked at the wet thermometer on the wall.
Good guy, the temperature is 36, the humidity is 91, it really is a big steamer!
This is the first half of the tunnel!
If it is inside, it will definitely be more exaggerated.
In terms of space, the tunnel is actually very large. The width is almost 30 meters and the height is almost 12 meters.
It stands to reason that such a tunnel will not give people a feeling of depression.
However, I felt very depressed.
A rubber raft came.
Tired workers sat on it.
They were wet, with blank eyes.
Many people lie exhausted, feeling that they don't even have the energy to pant.
"Tired." Jiang Dong smiled bitterly.
"How long are the working hours?" Zhou Yulang frowned.
"Just two hours."
"That's it for two hours?"
"How about you try?"
"I……"
Zhou Yulang shut up obediently.
Such a harsh construction environment, he has never seen or heard of it. It's even hard to imagine.
It seems that the engineering case of Jiaotong University is never mentioned.
This is the national situation. I will definitely not mention it.
We will only mention when we are most proud.
The construction period of the Gulan Mountain Tunnel has been delayed again and again, from three years to five years, ten years, and thirteen years...not very good.
The rubber raft drove slowly into the tunnel.
It's boring.
It's hot.
J.
The water on the ground is getting deeper and deeper.
There are still many sprinklers on the surrounding walls.
It doesn't feel like being in the mountains.
It felt like it was underwater.
All construction must be carried out in water.
Drill.
Install the steel frame.
Transport muck.
The most exaggerated is pouring concrete.
Not called watering.
It's called jetting.
The concrete was sprayed on and was immediately washed away by the water.
As much as there is left. Spray layer by layer. Spray until there is no water. Spray until it freezes. Spray until the strength is qualified.
Here, the cost is really nothing.
As long as it is available, all the technologies are used.
Almost all construction machinery is specially made. Otherwise, it cannot be used normally at all.
The first thing to do is to prevent leakage.
There is water everywhere. Once the leakage occurs, the consequences will be disastrous.
"Drainage is our biggest problem at the moment." Chen Yubin said, "If it is a normal water gushing, it can be handled. If it is a sudden and large water gushing, it will be troublesome. Not only the follow-up hand tail is very long, but also dangerous. Others make one. Tunnel, 90% of the time is spent on work. When we build a tunnel, 90% of the time is dealing with dangerous situations."
"Yes! Most of our energy is spent on rescue and rescue." Jiang Dong said with a wry smile, "In the last 30 days of the month, 26 days were used to eliminate risks. The remaining 4 days, a total of digging It's 127 meters. It's a good result. I hope it can be maintained in the future."
"Where did so much water come from?" Zhou Yulang asked curiously.
"I don't know. There is no accurate survey report." Chen Yubin said with a wry smile, "I guess it's impossible to find out."
Jiang Dong then briefly introduced the situation.
Gulan Mountain has a special geographical location, located in an area where three parallel rivers flow.
What does Three Parallel Rivers mean?
It means that the Nu River, Lancang River, and Jinsha River flow in parallel with each other, but they never cross or merge.
Next to it is the galloping Lancang River.
The water drained from the tunnel fell into the Lancang River.
If you look 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 is a natural scenery.
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 be from the sky ~EbookFREE.me~ The annual rainfall in the Hengduan Mountains is also very large, and the groundwater is very rich.
The rain alone is enough to absorb the Gulan Mountain.
Many academicians from the Academy of Sciences and the Academy of Engineering have come to study, and there is no good solution.
At present, we still have to rely on pumps to drain water.
Due to the very large displacement and the need for many layers of relay, the effect is always unsatisfactory.
After going about three or four kilometers, I saw many workers working.
All work in the water.
The water is exaggerated and it feels like a waterfall.
Workers who are a little thinner will probably be washed away.
If the heavy screw with the big thumb falls on the ground, it can easily be rushed out more than ten meters by the water.
If the smaller parts are lost, then...hehe.
It's hard to get it back.
The stagnant water is muddy and it is hard to see clearly. Can only be touched by hand.
From time to time, a forklift with a tall chassis brings a large amount of ice.
This is for cooling.
Because the temperature was too high, it was difficult to cool down, so a large amount of ice had to be transported in from outside.
The volume of those ice cubes is very large. Each weighs more than one ton. If it is outside in a normal environment, it takes at least five or six hours to melt it all. However, in the tunnel, a ton of ice melted in two hours.
The humidity thermometer on the wall shows that the temperature in the middle of the tunnel has reached more than 39 degrees.
This is a temperature that can suffocate and cause heat stroke.
The first one is coming today. Let’s have a little burst today Sunday. Update six chapters today. Ask for a recommendation. Thank you.