Chapter 694

Ten minutes later.

Gu Lu and Engineer Sun, who wore all kinds of protective equipment, sat on the submarine and went straight to the Bohai Tunnel, which is located 28 meters under the sea.

Through the gate on one side, Gu Lu entered the E30 section of the undersea tunnel.

There is oxygen in the tunnel.

Gu Lu took off his breathing mask and pinned the walkie-talkie to his waist.

"Chief Engineer Zheng, I've come underwater. Gu Lu said to the headset.

"Roger. Zheng Chun's calm voice came from the walkie-talkie.

"Professor Gu, you first go to the interface and find out the specific situation at the interface. Zheng Chun commanded on the intercom.

Gu Lu nodded, "Understood." ”

Then.

Gu Lu walked along the pipe to the interface between the E30 pipe and the final joint.

At the edge of the interface, Gu Lu touched it with his hand.

"Chief Engineer Zheng, the situation here is the same as in the report, the longitudinal deviation at the interface is very small, but the lateral deviation is very large, seventeen centimeters should be there. But the waterstop was crimped evenly, and I didn't notice any water leaking in. ”

Gu Lu reported the situation truthfully.

Basically.

The situation at the interface is almost exactly the same as the report received by Zheng Chun.

There is a large lateral deviation at the interface, but it is not leaky.

But......

A lateral deviation of 17 centimeters cannot be corrected by subsequent welding processes.

Let it exist.

It's always a hidden danger.

Hearing Gu Lu's report, Zheng Chun took a deep breath.

"Professor Gu, you stay where you are first, and when the workers are in place, we will officially start the re-docking work. ”

"Understood. ”

Maritime.

Immersed tubes are installed in the command room on board.

After Zheng Chun ordered Gu Lu to stand by in place, he turned his eyes to look at the equipment provider of the joint hydraulic system on the conference table, and frowned.

"Give me a word of approval, your company's hydraulics. Is it permissible to do another re-docking operation?"

The equipment provider grimaced, "Theoretically, yes, but it's ......"

"It's just what?" Zheng Chun's brow furrowed even tighter.

"It's just that I need to recalculate the amount of water and the time required to inject water when the water pressure in the tunnel closing cavity is increased again to the same water pressure as the water pressure outside the tunnel, and I also need to calculate the bending load of the sealed ejector trabecular that completes the drainage of the joint cavity under the external water pressure, and how much bearing friction will be under this load situation. The equipment supplier hesitated.

"Then stop this inkblot, hurry up and count it!" Zheng Chun's tone raised a little.

"I need time. The equipment supplier's tone was weak.

"How long will it take?" asked Jung.

The equipment supplier weakly raised a finger, "At least...... an hour. ”

The green tendons on Zheng Chun's forehead burst out.

Seeing Zheng Chun's angry look, the equipment supplier explained again and again, "I'm just a small leader in charge of sales docking, not a talent specializing in this area, and my strength is limited, and it can only be so long at the earliest." ”

"What are you talking nonsense for, hurry up and calculate!"

"Yes, yes!"

After venting his anger, Zheng Chun held the walkie-talkie and pressed the call button.

"Professor Gu, I have encountered some problems here, and I am afraid that the time for the official implementation of re-docking will be delayed by an hour. ”

"No problem. ”

............

An hour later.

In the command room, while Zheng Chun kept pacing back and forth, the equipment supplier finally calculated all the data in a hurry.

"Chief Engineer Zheng, data, data is out!"

Sweating profusely, the equipment supplier handed Zheng Chun a piece of paper with several sets of numbers written on it.

Zheng Chun took it and glanced at it.

Then.

Zheng Chun walked to the command platform with the data.

On the screen in front of the command station, the screen is displayed at the interface between the final joint and the E29 and E30 pipes.

"Old Sun, Professor Gu, next, you two will listen to my command. ”

E30 interface.

Gu Lu was outside the boring spirit object when he heard Zheng Chun's voice and suddenly became excited.

Finally...... It's time to get started!

Gu Lu rubbed his hands, and a gleam flashed in his eyes.

"Act according to the plan on the spot!" Zheng Chun sat in the command room and gave the order.

"Yes!"

"Yes!"

Gu Lu and Engineer Sun Qi claimed to be.

interface.

Gu Lu looked at the dozen or so welding workers in front of him, pointed to the opening in front of him, and commanded, "Masters, please re-weld this steel sealing door!"

The first thing you need to do if you want to re-dock is to re-weld the open steel seal.

Next, seawater is injected into the chamber so that the pressure of the chamber is the same as that of the outside seawater.

Gu Lu stood behind, holding his arms and watching the workers weld the steel sealed door.

The working surface of the workers is small, so it is difficult to weld.

After all......

It's easy to turn it on.

But to re-weld it, the difficulty factor is much higher.

fortunately

This group of welders are all professional welding technicians.

Most of them have obtained the certificate of the Welding Association of the United States.

Half an hour later.

The welding of the steel seal door is completed.

But......

In order to prevent the scattered operating tools from falling into the groove, Gu Lu and the workers worked together to check whether there were foreign objects in the groove with their bare hands.

Because the groove is the hatch, even if it is a length of rope, a wrench, a few screws, or a piece of angle steel, any small object falling will affect the seal.

After checking that the grooves are free of foreign objects, the first step of re-docking is complete.

However, this is only a small step.

Next, it's the main thing.

As per the scheme.

Next, seawater is injected into the binding cavity to make the water pressure inside and outside the binding cavity consistent.

Gu Lu had already gotten specific data from Zheng Chun.

Follow the data.

The water pressure required to be achieved in the water-stopping chamber is 0.28 megapascals.

To reach this megapascal, the amount of seawater that needs to be injected is about 800 cubic meters.

Now that the data has been obtained.

Na Gu Lu immediately ordered the workers to open the sluice gate and release the water.

The bubbling water flows down the gate into the binding chamber.

In order to ensure the safety of the hydraulic jacking system and the rubber sealing system, after calculating the bending load and bearing friction of the jacking trabecular, Zheng Chun's data was to control the flow rate of the seawater below 0.8 cubic meters per second.

Gu Lu strictly follows this data.

And to be on the safe side.

Gu Lu controlled the flow rate of the water to 0.7 cubic meters per second.

At this rate, 800 cubic meters of water should be filled for at least three or four hours.

But time is not very tight at the moment.

A few hours can still afford to wait.

Merely......

What Gu Lu, the on-site workers, and the people in the sea command room did not expect was that.

Less than an hour has passed since the water injection time, and the accident is sudden!