Liang Zhijian looked at the big guy in front of him with anticipation, and thought to himself, the technicians of Jiuzhou Heavy Industry have worked hard, and in just a few days, the big guy in front of him has been assembled and can be put into use.

Li Huakun, the general manager of the project, said loudly: "Chief Engineer Liang, it's finally good, we can try how this big guy is!"

"Well, give it a try right away. ”

In front of us is the Dagongshan Tunnel, which will reach a length of 14.5 kilometers, the longest among the dozens of tunnels of the entire Lixi Railway, and also the most difficult to engineer. Because the geological conditions are very complex, only a few hundred meters of excavation are currently excavated, and the whole project has almost just begun.

The previous "Robbins" always went on strike one after another, "jammed" at every turn, and each time there was a "jammed", it often had to stop work for more than 20 days.

For this 6-meter-diameter "Robbins", whether it is Liang Zhijian or Li Kunhua, they are very disappointed and very annoyed.

Now, the "Pioneer" manufactured by Jiuzhou Heavy Industry has been assembled and can be used. Li Huakun asked: "Chief Engineer Liang, is this large shield machine invested in the construction of the pilot tunnel, or into the main tunnel for construction?"

This must be thought through.

The difficulty of the pilot tunnel construction is much lower, and the geological conditions are far less complex. The main tunnel is different, it will pass through many fault zones, as well as hot spring belts, etc., and the geological conditions are very complex, which is a huge test for the construction of the shield machine.

At this time, Liang Zhijian seemed a little hesitant, thinking about some of the performance of the "Pioneer" and some parameters in his mind.

"Pioneer" has an overall length of 230 meters, a weight of 1,900 tons, and a cutterhead excavation diameter of 9.03 meters......

After thinking about it, Liang Zhijian still couldn't make up his mind, so he simply took out his mobile phone and dialed it to ask Tang Fei's opinion.

The phone was quickly connected, Liang Zhijian said the matter again, and then said: "Mr. Tang, what is your opinion, this shield machine is to carry out pilot tunnel construction for a period of time, and then enter the main tunnel construction after the run-in period and adaptation period, or enter the main tunnel construction at the beginning." ”

In order not to delay the construction period, in fact, Liang Zhijian's idea is to enter the main tunnel for construction, but there is a worry, in case this shield machine is in the main tunnel, there is any problem, it will be troublesome.

Tang Fei's hearty laughter came, and he said confidently: "Chief Engineer Liang, I suggest entering the main cave for construction." ”

Liang Zhijian reminded: "For the construction of the main tunnel, the geological conditions are much more complex, and the engineering is much more difficult, and the road will pass through the seismic zone and geothermal groups, which is a huge test for the shield machine." ”

Tang Fei said: "It is a mule or a horse, always have to be pulled out for a walk, into the main cave construction, I think our 'Pioneer' can withstand the test, in addition, please rest assured, during the construction of the main cave, our technicians will track the whole process, once the machine is damaged and needs to be repaired, all costs are borne by us." ”

Advocating the construction of the main tunnel with complex geological conditions, Tang Fei not only has confidence in the "Pioneer", but also wants to really test his shield machine.

If everything goes smoothly into the construction of the main tunnel and the Dagongshan tunnel can be opened smoothly, it will definitely bring a huge advertising effect and win a good reputation for its shield machine.

Foreign imported shield machines are not necessarily capable of the construction task, their own shield machine successfully completed, successfully opened the Dagongshan tunnel, that in the entire Huaxia railway tunnel construction field, will certainly play a huge role in advertising, maybe, many media will report, for their own shield machine free advertising.

Based on such considerations, Tang Fei advocated that the "Pioneer" enter the main cave for construction.

After making this call, Liang Zhijian waved his hand and said: "Enter the main tunnel construction, prepare for the hole now, I also want to see how the performance of this shield machine is." ”

Li Kunhua said: "Okay, I'll arrange it immediately." ”

In this way, the "Trailblazer" was ready to enter the main tunnel, while the previous "Robbins" had to give way to the much less difficult pilot tunnel.

Today's weather is good, it is rare to be a sunny day, the sun hangs in the sky, the sky is blue, the air is also good, as if the air is full of negative ions, every breath, giving people a feeling of relaxation.

Throughout the construction site, almost everyone knows that the "pioneers" will enter the main cave for construction, and many people come to witness this historic moment.

Several technicians and several skilled workers of Jiuzhou Heavy Industry Co., Ltd. checked the "Pioneer" again, and after confirming that it was correct, in everyone's eyes, this large shield machine began to enter the main tunnel.

Slowly, slowly, the "Trailblazer" began to enter the hole. The main tunnel is currently only a few hundred meters deep, and it was not long before the Trailblazer reached the working face.

The machine starts up.

The roar sounded inside the main cave, and because the depth of the main cave was not large, people outside the cave could hear this roar, and many people became excited.

"Listen, it should be working. ”

"This is our first domestically produced large shield machine, and I don't know how it will perform. ”

“……”

Many people craned their necks and looked into the main cave. Liang Zhijian waved his hand and said, "Let's go, let's go in and take a look at its work." ”

Liang Zhijian and Li Kunhua walked in the front, followed by at least a dozen people, and everyone walked into the main cave together, and walked towards the depths of the main cave.

The main cave was dug by drilling and blasting for one or two hundred meters, and the "Robbins" with a diameter of 6.39 meters was used to dig a distance, and after walking a few hundred meters, we not only saw the "Pioneer" under construction at the end of the main cave, but also heard a rumbling sound in our ears, and also saw a large number of rock debris being teleported out.

"Rumbling", in the dark Dagongshan tunnel, the fuselage is shaking and the noise is deafening, and the "Pioneer" hard rock boring machine is like a giant beast swallowing sand and rock, burying its head forward, invincible.

"Wow, it seems to be fast!"

"yes, it seems to be a lot faster than that Robbins. ”

Everyone soon realized that the efficiency of this shield machine seemed to be very high, and the speed was very fast, at least two or three times faster than the previous "Robbins", a large amount of rock debris was transmitted, and the "Trailblazer" was also moving forward little by little.

Seeing this scene, Liang Zhijian became happy and gradually relieved, the current performance of the "Pioneer" is just as Tang Fei introduced.

Liang Zhijian thought in his heart, Mr. Tang did not brag at all, and the performance of this shield machine was indeed excellent.

Li Kunhua said loudly: "Chief Engineer Liang, at this speed, you have to advance at least a few meters per hour, if you go all the way, you can dig through Dagong Mountain in a few months!"

It would be unimaginable to dig a tunnel with a diameter of 9 meters and a length of 14.5 kilometers in a few months, but now, it is really possible.

Liang Zhijian stayed in the tunnel for a long time, and kept watching the "pioneer" work with satisfaction, seeing that he had advanced several meters, Liang Zhijian thought to himself, this is really a sand-swallowing monster!

"What, I've advanced more than ten meters, it's impossible!"

"yes, it's only been in the hole for a long time, it's only two or three hours, it's so fast!"

“……”

Some information reached the ears of the workers, and many people couldn't believe it when they heard that the "Pioneer" was advancing very fast.

But the truth is there, this sand-swallowing beast has been moving bravely in the main cave, and its speed is not slow at all, and its performance is very good.

One day, two days, three days......

Everyone has become accustomed to the excellent performance of the "Pioneer", and the length of the tunnel of Dagong Mountain is increasing day by day, and this sand-swallowing giant beast is heading into the depths of Dagong Mountain.

As the chief engineer and the technical director of the Lixi Railway, Liang Zhijian did not dare to take it lightly, because he knew that the geological conditions around Dagong Mountain were very complex, and he had to cross many fracture zones and geothermal hot springs along the way.

In the simple office, Liang Zhijian and Li Kunhua were there, in addition to several engineers and technicians in the Dagongshan Tunnel, at this moment, everyone's heart gradually progressed.

The first test is just around the corner.

On the wall of the office, there is a general plan of the tunnel design, on which the location of the "Pioneer" is marked with a red pen, and the fractured zones and geothermal hot springs are also clearly marked.

"Chief Engineer Liang, the 'Pioneer' has reached the first fracture and fracture zone, and I don't know if there will be any abnormal situation. ”

There are also humanitarians: "Don't do anything, this is a fracture zone, which will be a huge test for the shield machine." ”

In the whole office, the atmosphere is more solemn!

The phone on the desk rang, Liang Zhijian picked up the phone, and said hurriedly: "I'm Liang Zhijian, what's the situation now?"

"Chief Engineer Liang, the 'Pioneer' has entered the fracture and fracture zone, and at present, everything is normal, it is moving forward at full speed!"

"Good, good, good. Liang Zhijian said three good words in a row. After putting down the phone, he said loudly: "Good news, the 'Trailblazer' is not abnormal, and it is moving at full speed. ”

"Oh yes!"

A young technician shouted loudly and shook his fist vigorously, very happy. The others are pretty much the same.

Liang Zhijian reminded: "Everyone, this is just the beginning, and it will take several days to completely cross this fractured belt. ”

Yes, this is just the beginning, and the fact that there are no problems at the beginning does not mean that there are no problems in the whole excavation process.

After such a reminder, everyone was not only happy, but also gradually restrained the smiles and happy looks on their faces.

Because the "Pioneer" entered the fracture zone, followed by a geothermal hot spring zone, Liang Zhijian was worried that something would go wrong, and these days he has been staring at the construction of the Dagongshan tunnel.

After about a few days, what he feared finally came to light.

At this time, not long after the "Pioneer" successfully passed through the first fracture zone, it was entering the first geothermal hot spring zone, and something happened!

An engineer and technician anxiously broke into Liang Zhijian's simple office and said loudly: "Chief Engineer Liang, something is wrong, please go into the cave and take a look!"

……

There are only two shifts today, the first shift is delivered first, and the second shift is about 21 o'clock in the evening.