As the excavation site rises, the soil becomes harder and harder.
In order to thaw the soil, it is often necessary to use a fire to bake the soil until it softens before digging can continue.
As a result, the speed becomes even slower.
For convenience, the fires are always placed in iron cabinets, which can be pushed in when roasting and pulled out when digging.
In addition, the air circulation must be ensured. The passage was only about ten meters. It took a long time to dig, and finally more than half of the distance was dug.
The closer you get to the surface, the more careful you are.
Because the surface of the earth is now composed of frozen soil + ice + snow, this structure is not stable and may collapse if you are not careful.
Therefore, considering this problem, during the last ten meters of the road, Fang Yu adopted the excavator's suggestion and reinforced the passage every two or three meters of digging and moved forward slowly.
But no matter how slow the project is, it will only be about ten meters in the end.
Due to their carefulness, the tunnel was successfully dug down to the last two or three meters.
Fang Yu inserted the map directly into the terrain, and after confirming that there were only a few meters away from the hospital, she asked her teammates to dig carefully.
As the excavation got deeper and deeper, after a while, suddenly, the iron pickaxe hit a very hard object, making a "bang" sound.
Fang Yu and others hurried up and wiped away the layer of frozen soil.
"This is...concrete! We've dug down to the top pavement!"
The excavator said excitedly after seeing the "concrete slab" above several people's heads.
"Isn't this the foundation of a hospital? If this were the foundation of a hospital, there would be a layer of reinforced concrete on top of the base concrete. Such a structure only relies on our tools. The concrete is okay, but there is no cutting machine for the steel bars.
It’s impossible to destroy it.”
At this time, the geological engineer who knew something about building construction spoke up.
After getting along for so long, everyone is familiar with each other. Although this geological engineer sounds nice, in fact he was an ordinary construction worker before the end of the world, but he studied geology.
Fang Yu shook her head and said.
"According to my estimate, we haven't dug under the hospital yet. Besides, if this was the foundation of the hospital, it wouldn't be above our heads. According to our digging height, our current position should be higher than the foundation.
"
Fang Yu looked up and saw that after "hard" study in the game and relying on his "talent", he had successfully transformed from a simple game planner into a multi-faceted "knowledge master".
He reached out and touched the concrete roof above his head and spoke.
"You will know once you break it. If the roof is a pavement foundation, then the thickness of the concrete slab should be about 25 cm to 30 cm, so we should still be able to break it."
"If we can't break it open, we'll change positions!"
After listening to Fang Yu's words, the team members behind him all nodded.
This is the result of Fang Yu's business during this period.
As long as he speaks, the team members below will basically believe it.
As soon as the words fell, several team members immediately took action, and Fang Yu naturally had no intention of staying out of the matter.
Use iron hammers and chisels together. If your hands are numb, use another one. When your hands are cold, warm them up over the fire.
After a while, a hole was drilled into the cement board on top!
Seeing the ice outside the hole, Fang Yu and others let out a burst of cheers after breathing a sigh of relief.
After confirming that this was pavement and could be broken, everyone became more motivated.
The gap is the key. Once the gap is broken, it will be widened much faster.
In less than an hour, everyone made a hole in the concrete pavement big enough for three people to get out.
Looking at the ice at the entrance of the cave, Fang Yu touched her chin.
Then he turned around and asked his teammates to prepare the iron plates and colored steel plates that they had specially collected and dismantled before. The final attack was about to begin!
According to past observations, the ice and snow layers on the road are now at least seven to eight meters high.
The first and second floors of ordinary floors have basically been buried in ice and snow.
During this period of time, Fang Yu was thinking hard about how to proceed in this last stretch.
Although the temperature outside is low, this is not the main problem.
The biggest problem is the erratic cold current.
Fortunately, after several times of "pseudo-sage" thinking by Fang Yu, he finally had a plan that he could refer to!
Breaking through ice is no easier than breaking through concrete.
The ice layer, which is about 80 to 90 centimeters thick, breaks relatively slowly with the combination of nails and hammers.
After half of the ice broke, a team of people came to take over.
Only then did Fang Yu wake up from her busy schedule.
It turned out that this short distance of more than ten meters actually took them a whole day!
However, this distance of more than ten meters is also a staged breakthrough.
Half of the ice layer has been broken, and after the remaining ice layer is broken, it will be effortless to dig out the snow layer above.
However, as this mission comes to an end, you need to be more careful and vigilant.
Follow the next schedule.
If Chang Shan's second team wants to continue digging, it will be this half of the ice layer plus the snow layer, and the snow layer is already the top layer.
Once the snow layer is not treated well and collapses, the excavation team members will be directly exposed under the surface.
Fang Yu was not worried about them carrying out such excavation work at night, so after discussing with Chang Shan, they decided to change the mission of Chang Shan's second team.
When a team is resting, their task is to continue collecting materials, and collect more color steel plates and iron plates to place in the passage. When the task is almost completed, they start to rest, adjust their work and rest, and wait for tomorrow's general attack.
.
Chang Shan would naturally have no objection to Fang Yu's decision, and neither would the team members below.
When Fang Yu was going to rest, she grabbed Chang Shan and murmured a few words to him. After Chang Shan nodded and made a reassuring gesture to him, Fang Yu went back to rest peacefully.
Day five of digging the tunnel.
After Fang Yu woke up, she saw that the members of the first team were also sleeping in the room. There were only two members on duty in the room with red eyes, but they did not dare to look at the flames at all.
After Fang Yu woke up, other team members began to wake up one after another.
After a while, everyone in the room woke up.
After a night's rest, the members of the second team once again replenished their physical strength. Although the first team was a little depressed due to the temporary return to normal classes, the overall condition was still relatively good.
After letting the two team members on duty go to rest and leaving one team member whose muscles were sore due to too much work yesterday to watch the fire, the rest of the team came to the passage.
Fang Yu and Chang Shan took the lead, and the others entered the passage and walked towards the end of yesterday's excavation.
When approaching the end, there will be strips of iron plates and color steel plates on the sides of the passage. Although these iron plates vary in length, their shapes are basically similar to the door panels, just a little smaller.
At this time, the work that Fang Yu asked the first team to do yesterday seems to have been completed well.
After only a few hundred meters of walking, they soon arrived at the location where the ice broke yesterday.
The second team not only prepared the iron plate last night, but also the ice layer was broken under Chang Shan's command until only a thin layer was left. They also expanded the hole and used flames to "trim the edges" and remove some sharp corners.
Melt it with flame.
Now, as long as this last layer of ice is broken open, the top layer of snow will fall directly, forming a hole.
And this means that everyone's excavation has finally reached the final step.
