Due to the tight time and heavy tasks, as soon as the performance ended, Fang Bojing and Yang Zijiang took the construction team to Shandong. Before leaving, Director Dong had already agreed with them, the task of the construction team is to open a big mountain in the middle of the aqueduct, as long as a tunnel is dug in the mountain, their task is completed, and other ancillary projects, excluding road repair and excavation of the aqueduct, do not need to be managed.

Looking at Director Dong's relaxation, after all, the two of them have also been staying at the station for many years and have been dealing with Dashan, especially Fang Bojing, who has more than 10 years of experience in tunneling. And Yang Zijiang is not weak, in the professional team of caves, he has been in the cave for at least 3 years, and he is not familiar with all kinds of construction equipment and construction links, and he can also be proficient.

Therefore, as soon as they received Director Dong's request for help, the two immediately agreed. I think that with my years of construction experience and the advanced construction equipment of the station, it is not a dish to dig a tunnel in the mountains?

Who knows, only after a field survey did they know that the complex situation of the geological structure here is far more complicated than the situation they encountered during the construction of the station.

As soon as they got there, they went to the field under the leadership of Director Dong to investigate, and when they saw the various drawings provided to them by the survey team, they frowned.

"It's over, it's underestimated!" The two looked at each other and smiled bitterly.

"What, is it complicated?" Seeing the two of them holding the drawings with a frowning look, Director Dong was naturally worried.

"Quite complicated!" Fang Bojing pointed to the drawings and said to Director Dong, "You see, from this mountain inward, most of them are sedimentary rocks, but this mountain has igneous rocks and sedimentary rocks, why is this?" How can it be so complicated? ”

"Ancestors, it turned out that this was the bottom of the sea, and because the water slowly receded, it became what it is now," Director Dong described in a colorful voice.

"It seems that there was a volcanic eruption here when the water was turbulent, so the current special geographical structure was formed!" Yang Zijiang guessed.

"I don't understand this, if you want the physiological structure of the human body, I can describe it to you with my eyes closed, but this big mountain, our local farmers, only know its external mountain characteristics, no one knows what it looks like inside?" Recommended reading: sm. s..

"Someone knows," Yang Zijiang blinked mischievously,

"Who?"

"Survey team? They must know, you can see the annotations on the map, the complexity of the geological structure, they have long known, looking at the outside of the mountain is very simple, the boulder mountain towers, round and covered by lush vegetation, in fact, the inside is like a bun, there are all kinds of fillings, both mud, and soil, that is, there are hard granite, there are also broken stones, the most terrible is the cave and water! He introduced Director Dong.

"So what? Is it dangerous? ”

"Of course, mud and gravel collapse!"

"What do you mean by that?"

"When working in a cave, there may be sudden water, mud gushing, and even a large-scale landslide, and if it is serious, it will even collapse all the way to the top of the mountain!"

"Is it that serious? Is there any good way to solve it? ”

"Yes, there must be, for the mountain, it is to disturb, diligent support, not too much movement, but then the construction period will be long, and if the water gushes, it will cause casualties!"

The two of them pointed to the drawings, poked and poked, and chatted with Director Dong.

Originally, what they thought was very simple, as long as they made a job at the end of the cave, and then continued to push inside, with the advanced equipment in their hands, the construction progress would be very fast. When I arrived at the construction site, I realized that the situation was far more complicated than what Director Dong introduced.

Moreover, the roads and aqueducts on both sides have been repaired, but because of the barrier of this mountain, it is impossible to cross the water with your eyes open.

The common people are looking at it with their eyes, how can the construction period be long? Moreover, the impact is not good, huh?

Some people will, and so do the local people, if you open the tunnel and connect it at both ends, won't you be able to open the water?

In fact, how can it be so simple, if you simply dig a tunnel that can pass through water, it is not too easy? At most, it is one or two meters high, and one or two meters wide can be completely solved.

But now the situation is the opposite, it is the aqueduct, and a road has to be erected, which is equivalent to building another bridge in the cave, flowing water below, and cars on it, think about how complicated it must be?

If you don't do that, you can build a road on the left and an aqueduct on the right, so that the height will be lower, but the span of the tunnel will be increased.

Because of tunnel construction, the most feared is the large span. Therefore, there are many expressways that take up and down roads when passing through the mountains to solve this problem, and also to avoid the tunnel span being too large and increasing the difficulty of construction.

Until now, the two of them didn't know why the villagers had been waiting for them here for so long and voluntarily, and the villagers had placed too much hope on them.

The equipment has all arrived in advance, seeing these new equipment, the eyes of the villagers suddenly lit up, they have never seen cave construction, and there is such advanced modern equipment.

Looking down at the primitive equipment in their hands, it is understandable why no one dares to move this tunnel for so many years.

In fact, the backward tools are naturally one of the reasons why we did not dare to start construction, but the most important thing is that the geological structure of this mountain is too complicated.

After the county's survey team surveyed, they knew that this was definitely a tough guy, and if there was no modern equipment, let the local people rely on the primitive tools in their hands to work hard, it would definitely cause particularly large casualties. No one can afford this responsibility, and they can't let the villagers take this risk!

Because the most feared thing about tunneling is the collapse of water and mud and rubble, and this cave includes almost all of them. In the area with complex geological structure and rich water in karst caves. During the excavation of the tunnel, the mechanical balance of the water body in the mountain, soil and stone layer was broken because the original geological structure was destroyed.

When there is no timely protection, it will cause water and soil to pour into the excavated cave together, if the operation is improper or the support is not timely, the support is not firm, it will cause the engineering framework, under the dual action of external force and gravity, exceed its own strength limit, and cause collapse, cause casualties.

Especially in the construction process of excavation, blasting and waterproofing, the out-of-control object will suddenly move under the action of inertia or gravity, pour down, injure the human body, and cause equipment damage and casualties.

"It's hard!" After listening to Yang Zijiang's introduction, Director Dong's brows were almost twisted into a rope buckle.

"What can I do?" read3;