Chapter 123

Some of the data on the Bohai Tunnel project was distributed to the participants a few days ago.

Therefore, more than 100 experts from various fields present have already done their homework and have a more thorough understanding of the project.

Of course, there is certainly a lot of confusion and incomprehension.

These need to be addressed at this seminar.

On the other hand, Gu Lu opened a document used as a note on the computer, and his eyes slowly swept over the hall.

Of the more than 100 experts attending the meeting, because Gu Lu did not study in the field of marine and engineering architecture, there were not many people he could recognize except for the fourteen academicians sitting in the front row.

But there are a few well-known existences in the world or in China, and Gu Lu still recognizes them.

For example, the middle-aged man on the rostrum in the center of the hall now, Gu Lu has heard of his name for a long time.

Zheng Chun, a senior engineer, served as the deputy chief engineer of the Jiaozhou Bay Submarine Tunnel Project, led the team to overcome the problems in the construction of the undersea tunnel, has more than 40 national invention patents, and has achieved many achievements that are ahead of the world level.

Zheng Chun, who is only 45 years old this year, is already the chief engineer of the China Railway Tunnel Group, and I heard that the approval of Zheng Chun's inclusion in the list of academicians of the Chinese Academy of Engineering has been handed down, and it is estimated that Zheng Chun will be officially promoted to academician at the end of the year.

He became one of the few engineers in history to be honored as an academician of the Academy of Engineering before the age of 50.

Now, Zheng Chun is sitting on the rostrum in the center of the hall, and the meaning is actually self-evident.

The chief engineer of the Bohai Tunnel project is undoubtedly Zheng Chun.

Because as the chief engineer of the project, he must have been on the front line in the construction stage of the project.

Wind and sun, snow and rain.

In addition, the construction period of the Bohai Tunnel project is extremely long.

According to the plan, the distance of more than 100 kilometers of the entire Bohai Tunnel is expected to take five to ten years to be fully completed.

Therefore, the position of chief engineer is obviously inappropriate to select one of the fourteen gray-haired and gray-haired academicians in the first row, and some of them need to be supported to walk.

And an engineer like Zheng Chun, who is in the prime of life, has the ability to be no less than an academician, plus he has the construction experience of building the longest submarine tunnel in China, the Jiaozhou Bay Tunnel.

It is no longer suitable for him to sit in the position of chief engineer of the Bohai Tunnel Project.

Sure enough, Zheng Chun, who was sitting on the rostrum, helped the microphone and cleared his voice.

"Ahem...... Everyone, be quiet, be quiet. Zheng Chun's angry voice spread throughout the hall, and the entire hall fell silent in an instant.

"First of all, let me introduce myself, in Xia Zheng Chun, the current chief engineer of China Railway Tunnel Group, everyone who sits there should know me, so I won't repeat my resume to you one by one. Zheng Chun's tone was extremely calm and confident, "What I want to introduce to you today is my new identity. ”

"Just a month ago, I was officially appointed by the General Bureau of Road Traffic of China as the chief engineer of the Bohai Tunnel project, with full responsibility for all matters related to the construction of the Bohai Tunnel. ”

Zheng Chun's gaze became sharp, "I know that there is a lot of opposition to the plan to build the Bohai Tunnel. ”

"It's their business to oppose it, but I don't want to see discordant voices within us!" Zheng Chun's voice suddenly increased, "During this pre-construction discussion, I hope that you will cooperate sincerely, show your housekeeping skills, and don't hide it." Strive to develop a perfect construction plan. ”

"Remember, we are not building the Bohai Tunnel to meet the interests of a few small groups, but for the development of the whole country!"

If you want to get rich, build roads first!

This wise saying can never be wrong.

If China's economy wants to continue to develop and catch up with the goal of becoming the world's largest economy, the Bohai Tunnel, a bridge connecting North China and Northeast China, must be built!

"That's all I have to say, a meeting!"

On the first day, the future chief engineer of the Bohai Tunnel project showed his domineering and toughness.

…………

Pre-construction workshops.

Since it is called a seminar, it is natural to focus on discussion.

Today is the first day of the seminar, and there is only one topic to be discussed: what kind of construction method should be used for the construction of the Bohai Tunnel?

This is the most basic question.

Because all the equipment and conditions of each tunnel construction method are different, only when the specific construction method is determined, some follow-up questions about the details can be discussed and studied.

At present, there are three mainstream technologies for the construction of undersea tunnels.

They are: burial method, shield method, and roadheader method.

To put it simply, the subsidence method is to prefabricate a circular tunnel on the ground, and then dig a trench in the seabed to sink the tunnel into the trench.

Finally, the sections of immersed tunnels are spliced together.

The shield method and the TBM method use special machinery to advance in the geological layer or rock layer, and then the concrete segments are spliced into a tunnel by personnel inside the machine.

The difference between the shield machine method and the TBM method lies in the equipment used.

The three types of tunnel construction technologies have their own characteristics, as well as their own advantages and disadvantages.

Now, it's the experts' turn to make a choice.

"Don't be restrained, express your opinions. Today's construction method must be determined, otherwise this discussion will not end. ”

"I don't think you want to miss lunch. Zheng Chun looked at everyone with a smile.

"Then let me throw the bricks. It was an engineer sitting in the third row, and after the voice fell, the large screen in front of the auditorium showed the picture on the engineer's computer screen through a data connection.

The engineer lifted his eyes, opened a file on the computer, coughed lightly, and slowly spoke, "My point of view is to use the burial method to build the Bohai Tunnel!"

"This is the construction process I have in mind so far, so please take a look at these pictures. ”

"The construction of tunnels by subsidence technology can be divided into four parts, namely foundation trench excavation, foundation construction, pipe section production, and joint design and treatment. ”

"First of all, in the trench excavation stage, we use a bucket dredger to mix the soil to be dredged into a slurry and suck it away, and the vertical and horizontal transportation of the dredger is closed, which can protect the environment as much as possible. ”

"For foundation construction, we can follow the example of the Jiaozhou Bay Tunnel Project and use a model scraped gravel foundation. After digging the trench, ......"

"As for the production ...... of pipe sections"