Chapter 691

"The lateral error is 17 centimeters, do you want to refine-tune the docking? Zheng Chun crossed his fingers and glanced at the people in the conference room, and his tone was flat and he couldn't hear too much waves.

This is Zheng Chun's habit, whenever he encounters a major decision, his first step is to gather information and weigh it.

There was a brief silence in the room for a few seconds.

Then, a person in charge was the first to speak, "Because it does not leak, I can accept even a deviation of 10 centimeters, but a deviation of 17 centimeters has reached the limit of the design tolerance, and it is difficult to choose now." If you install it again, you are not afraid of the process, but you are afraid that it will not be successful if you install it again. Once you go from success to unsuccess, everything is ruined. ”

As the person in charge of the Bohai Tunnel project team, he knows very well that if the error defect is within 10 cm, it can be adjusted by decoration or welding of the inner surface of the pipe section.

But the lateral deviation figure came to a full seventeen centimeters.

It is no longer possible to reverse repair through processes such as welding.

But......

If you choose to re-dock.

It will take the risk factor to another level again.

If the re-docking is successful, then everything will naturally be fine.

And if it fails.

The damage and subsequent impact is immeasurable.

After all.

The completion ceremony will be held the day after tomorrow.

At that time, not only will many people in the industry attend, but also many domestic and foreign journalists will attend the completion ceremony.

If the outside world learns the news of the failure of the Bohai Tunnel docking, it will lose the face of the whole country.

Huaguo has always been known as an infrastructure powerhouse.

The docking failure of the Bohai Tunnel will undoubtedly deal a huge blow to this title.

This responsibility......

These people from the Bohai Tunnel project team can't afford to be responsible.

"Ahem, let me tell you what I think. This time it was the deputy director of the tunnel engineering who spoke, "The wrong side exceeds the requirements of the acceptance standard and is a quality defect." Since there is neither a precedent nor a national standard for the final joint installation, if the Bohai Tunnel Authority and the chief designer allow such deviations and release them, as the project supervisor, I will agree. ”

"However, according to the evaluation standards of the Bohai Tunnel, quality points should be deducted from the project during the credit evaluation. The defect is a non-conforming item, which is bound to become the failure of more than ten kilometers of immersed tube installation. ”

When the project supervisor said the last word 'failure', Gu Lu noticed that Zheng Chun, who was sitting in the main seat, pursed his lips and clenched his hands into fists.

This is a rather unwilling performance.

Not only Gu Lu, but there were also people in the conference room who smelled Zheng Chun's unwilling breath.

Sitting on Zheng Chun's left hand side is Zheng Chun's deputy, the deputy chief engineer of the Bohai Tunnel project team.

He glanced around the room and said, "If it meets the design and use requirements, I don't approve of the jacking rework, because the final joint is not leaking." Theoretically, the four support systems can be reversed once according to the original process, but there is a lack of practical plan for what risks will be encountered in the reverse operation process, so the risk of doing it again immediately is too great. ”

The deputy chief engineer did not hide his opinion at the decision-making meeting.

Because he was afraid that the fruits of more than three years of hard work would be ruined.

If something goes wrong in the process, the project can be delayed for months or a year, negatively impacting the owner, the contractor, and even the country.

This loss is enormous.

Whether it is a tangible loss or an intangible loss.

"I think what Chief Engineer Zhang said is right. Another person in the room stood up in support of the deputy chief engineer's point of view, "In the original design of the final joint jacking system, there was no plan for 'reinstalling' the reverse operation, but for installation and testing, the hydraulic system had the function of moving the jacking trabecular out and installing it again. Although it is possible to release the load from the jack and then retract it with a pump, it will pose a great challenge to the system equipment under difficult operating conditions. ”

He was the one who used the hydraulic jacking system for the joints, and he knew how difficult it would be to reinstall the reverse.

If one is not good, it may be a complete loss.

"The crimping condition is quite good, the pipe does not leak, according to my previous experience, the overall line shape is very good, although the GINA waterstop is compressed again, theoretically there is no problem with the water tightness, but our longitudinal spacing, plane corner, vertical position, vertical corner, GINA waterstop compression and water stop effect are perfect. ”

"For the sake of a precise match, it means putting all these hard-won perfect results back into uncertainty, so I tend not to re-dock. Next to him, the supplier of the rubber waterstop for the Bohai Tunnel made the same point.

That is, it is advisable to leave it as it is and not to re-dock.

Because in the current situation, although the lateral deviation at the interface is large, the overall safety of the submarine tunnel is still well guaranteed.

At most.

The service life of the Bohai Tunnel, which was originally expected to be 120 years, has been shortened to about 100 years.

It's not that it can't be.

…………

Many people in the room expressed their opinions.

Some people have an ambiguous attitude.

But more people choose to stay the same and not try to re-dock.

As for the 're-docking' option, I didn't choose it.

Re-docking corresponds to risks and uncertainties.

No one has the certainty and confidence to say that the re-docking will be successful, and the docking effect will be better than the current one.

Moreover.

The hydraulic system and sealing and water-stopping system at the tunnel docking may not be able to support a new docking operation.

The room fell silent again.

Zheng Chun rubbed his chin with his hand and frowned silently.

Moment.

He seemed to be a teenager.

I understand what you're saying.

But......

I'm really not reconciled!

But, even if you are unwilling, what can you do!

Zheng Chun sighed, rubbed his swollen eyebrows and spoke, "Since everyone's opinions are unanimous, then I declare ......"

"Chief Engineer Zheng, wait a minute. Zheng Chun was halfway through his sentence when he was interrupted by a voice.

And it was none other than Gu Lu who interrupted Zheng Chun.

Zheng Chun's inquiring gaze looked at Gu Lu.

Gu Lu smiled slightly, "Professor Gu, can I say a few words." ”

Zheng Chun was stunned for a moment, then nodded, "Professor Gu, please speak." ”

Gu Lu nodded in thanks, then took a deep breath, his gaze sweeping over the faces of everyone in the conference room.

And the rest of the people in the conference room also looked at Gu Lu.

There was curiosity and scrutiny in his eyes.

"I am just a small technical consultant of the Bohai Tunnel project team, and I have not contributed much to the construction of the Bohai Tunnel for more than a few years, so I should not have said anything more at such an important meeting, but after listening to your speeches, I still feel unhappy with some words!"