After receiving this good news, everyone cheered up.

Master Guan of the aviation repair team personally conducted a detailed inspection of the immersed tube again, and finally reported to the command room very seriously: "All inspections have been completed, there are no problems."

What they are responsible for is the outfitting of the immersed tube.

Ballast water system, communication system, monitoring system...

More than 100 main lines, more than 1,000 branch lines, and intricate pipelines are connected from the immersed pipe to the Jin'an 3 command cabin control center.

These pipelines are nerves connecting the brain and various parts of the body. Every contact must be connected in place, and every line must be smooth.

If there is a problem with the line when it is sunken, there will be a situation where "hands and feet cannot move, eyes cannot see", and the sinking tube will not be able to successfully complete precise docking.

The installation of these lines is handled by Master Guan and his team.

When General Manager Lin first started working, he also learned to work as an fitter from his master. From a certain level, they are actually fellow workers.

So when I visited the inspection before, General Engineer Lin and Master Guan had a great chat.

"This master Guan's work skills are very exquisite. It is rare that he is not only superb, but also has the ingenuity to strive for excellence." Chief Engineer Lin adjusted his posture and made his back straighter: "He has confirmed that, there should be no problem."

There will be no problem with immersed tubes, and even if they are on the scene, they may not be more professional than Master Guan.

Lu Zi'an and General Engineer Su had no objection to this. After another meeting and discussion, they decided to implement docking immediately.

In order to ensure that the pipe sections of the immersed tube tunnel can be accurately connected, the navigation team has established a measurement system and adjustment device.

When all the instruments are turned on, the image content is instantly replaced on the screen in the command room.

The scanning total station automatically tracks the prism on the measurement and positioning control tower, and uses a computer to calculate the current position of the pipe segment based on the measurement results, and displays it on the screen.

"We have upgraded this measurement system several times after many calculations, and the effect is very good now." Chief Engineer Lin said proudly: "Look at this image, it's so clear!"

It is no longer a monotonous single line. At this time, not only are the images on the screen very clear, but different parts are also distinguished by different colors, making it easier for them to adjust.

But what Lu Zian cares more about is the ultrasonic detection device, commonly known as the underwater three-dimensional system.

He believes that only by combining the two can we achieve more efficient results.

“Countdown, three, two, one.”

Lu Zian's voice was still very calm, and everyone could clearly hear their heartbeat.

The moment of witnessing a miracle is coming.

Everyone was sweating, both expecting and nervous.

"start!"

Accompanied by the roar of the machine, the sinking tube dropped at a constant speed.

The cleaned base groove lines are clearly presented to everyone's eyes. The sinking tube descends very slowly, but because of the two systems cooperating with each other, the command room can timely grasp the absolute position and status of the sinking tube.

Everything is at your fingertips, and everyone feels this feeling very good.

Under the guidance of Lu Zi'an's command and determination, the sinking tube was safe and correct and realized its sinking in the shortest time.

Everyone sighed softly as the immersed tube on the screen fell steadily into the base slot.

At this point, the docking program has been completed.

The ultrasonic detection device automatically measured the mutual distance between the immersed tube and the end surface of the artificial island, horizontal and vertical offset, and the tube segment was inclined. The detection result was processed by a computer and displayed an image. After the processing was completed, it was quickly sent to the command room.

After confirming that the sinking tube reached the fixed location, Lu Zian issued another order: "The diver is in place."

The screen immediately switched to the artificial island, and real-time monitoring clearly showed that as soon as Lu Zi'an's voice stopped, divers had already started to go into the water.

They conducted a very rigorous and numerous inspections to confirm the correct position and ensure the safety and success of the docking.

Looking at the green lights that light up, a faint smile gradually spread in everyone's eyes.

When the last light illuminated, the immersed tube had been twisted and moved 10 meters away from the buried section, Lu Zi'an ordered the opening of the ballast water tank.

1,900 tons of ballast water were injected into the immersed tube, making the immersed tube tilt of 0.01 degrees.

After doing all this, he said in a deep voice: "Everyone evacuated and return to land immediately."

It is about to connect, and no one is allowed to stay in the sea.

When all divers surfaced, the staff began to provide real-time feedback.

"The divers have been evacuated!"

"The anchor machine is in place!"

“…”

All the preparations were ready, General Engineer Su Lin and Lu Zi'an looked at each other and carefully pressed the button together: "Start docking!"

It was a very solemn atmosphere, and needles could be heard in the room.

The immersed tube is so slow that it is almost impossible to notice it moving.

However, it is indeed moving. The two and four machines of the installed ship are linked to achieve linkage, and the 70 cm and 1.35 meters are placed simultaneously, thereby adjusting the longitudinal slope of the sinker to 2.996%, which is parallel to the base bed.

When the immersed tube stops again, it has been twisted and moved to 1 meter from the buried section of the artificial island and placed 1 meter away.

After the immersed tube state is stable, the two machines of the Jinan No. 3 installation ship were simultaneously lowered by 0.3 meters, so that the head end of the immersed tube is implanted first.

Then, the two machines of the Jin'an No. 2 installation ship were simultaneously lowered by 0.3 meters to implant the end of the immersed tube.

In order to obtain the most accurate docking accuracy, Lu Zian, after difficult posture adjustments and data reviews, he required the operator to fully compress the Gina water stop through jack pulling, perform hydraulic crimping and fine adjustment in the pipe.

Finally, the connection is completed!

Everyone stood up subconsciously, and some even started to applaud.

Chief Engineer Lin and General Manager Su remain rational and are not tempted by the victory in front of them.

"Quick, calculate the data, what is the error?" Chief Engineer Su immediately stood up and leaned forward to ask.

"Okay, I'm calculating." The staff quickly adjusted and calculated, and calculated variously based on the feedback data.

Lu Zian closed his eyes slightly and tapped his fingers gently on the table. The conclusion he came to was even faster than theirs: "The error is about seven centimeters."

Before he finished speaking, the staff had given more accurate numbers: "The error is seven centimeters."

Fortunately, the strings that Mr. Su’s heart was finally relieved.

Seven centimeters.

The accuracy requirements for docking immersive tubes are very high. Too large deviations may cause water leakage in the tunnel. Foreign countries will control the accuracy within 15 cm.

Although seven centimeters are not small, for such a huge creature, seven centimeters can almost be said to be very small.

"This data is not possible." Lu Zian looked at the screen calmly, with sharp eyes: "I want to re-adjust the position. You see, it is now this place, which is three centimeters away, so the overall deviation is seven centimeters. If you can adjust it here, there is no need to make a big move. If you fine-tune it, the error of these seven centimeters will be reduced by at least four centimeters."

Chief Engineer Lin and Chief Engineer Su suffocated their breath and said at the same time: "Are you sure?"

Not.

Lu Zian did not answer their question, but said quickly and decisively: "Although the international accuracy is controlled within fifteen centimeters, it is considered to be qualified, but because there is no precedent and standard in China, especially this bridge is very important. I think we should put pressure on ourselves and increase this standard to 5 centimeters."

If we follow Lu Zian's standards, the current accuracy is indeed insufficient.

However, if you finally successfully connect and adjust again...

I'm not afraid of ten thousand, I'm afraid of anything...

Chief Executive Su looked at Lu Zian silently for a moment, frowned slightly: "Do you really need to adjust?"

"Yes, and it must be adjusted." Lu Zi'an's attitude was very firm, without doubt.

Engineers have different opinions. Some people think that this accuracy is already very rare, and even internationally, it is a very good result. It is impossible to adjust it to within five centimeters, so there is no need to adjust it at all.

Another part thinks that since Master Lu has proposed it, it should be feasible.

The two sides argued again in an instant, but Chief Engineer Su Lin didn't speak for a long time.

After a long confrontation, Lu Zian finally ended the debate in one sentence.

"A project of such a large size, seven centimeters here and seven centimeters there, all of them were released. There were more than 30 sinking tubes in total. What a huge number they were?" His voice was not sharp, but his words were very rude: "Since you want to do it, do it your best. If something really happens, I will take responsibility!"

"Yes, since you want to do it, do the best!" Chief Engineer Su and Chief Engineer Lin looked coldly and stood up tacitly: "We believe in you, and we believe in ourselves. If there is a problem in adjustment, we will accompany you to bear the consequences!"

With them taking the lead, other engineers gradually changed their minds.

Yes, their project cannot tolerate any mistakes. Since they have the opportunity to do their best, are they giving up the opportunity to correct mistakes that are within their reach because they are afraid of failure?

Finally, the changed plan was passed unanimously.

The divers were launched into the water again and made detailed measurements.

Although not all of them are repeated, many processes have to be redone.

Seeing the sinking tube being moved again, everyone was sweating.

Under Lu Zi'an's command, as he said, he adjusted upwards slightly by three centimeters on the left.

This time, even Lu Zian felt his heart beating a little faster.
Chapter completed!