Chapter 383

Because the pipeline construction needs to avoid the buildings on the ground, and considering the influence of factors such as thermal expansion and cold contraction, the pipeline cannot be pulled into a straight line, and the elbow must be set in the middle.

So in the process of construction, how to install the elbow, and how to deal with the change of pipeline direction after the installation of elbow, has become the problem Chen Xin must consider.

The installation of the elbow itself is easy to say. It's a big deal to dig a shaft from the ground to put it down. Although there is a certain amount of work, it's still easy to complete. As for how to weld, Chen Xinda can use the mechanical arm of the power armor to do it.

But after the pipeline line changes direction, how to put the pipeline down is a difficult problem for Chen Xin.

In the past, if you want to lay a pipeline, if it is not directly on the ground, the most common way for the construction party is to excavate the whole ground for construction, and then cover the soil and backfill after completion.

Of course, Chen Xin can also use this method. He can dig up more than ten meters of snow to put down the pipeline. Unless Chen has hundreds of exoskeleton equipped workers and a lot of construction machinery, he is not suitable for such a huge construction method.

And if Chen Xin wants to use this method to construct, he doesn't have to make a small shield machine himself.

Facing this problem, Chen Xin did not scratch his head alone, but found Cao Daren and asked him if there was a suitable way.

After all, Chen Xin used to be only a writer who wrote online novels. Although he didn't completely understand this kind of construction project, he certainly didn't have much contact with Cao Daren.

"If this is the problem, I suggest you use the pipe jacking method for construction." Sure enough, when Chen Xin asked, Cao Daren had already given a practical plan, and said to Chen Xin, "I thought you had already thought of using this way to construct! The shield machine is used for tunneling, and the pipe is jacked in one by one at the back. Isn't this the plan you expected in advance? "

"The plan I envision is really to use the shield machine to dig the tunnel, and then put the pipe in, but it's still a little different from the pipe jacking method you said." Listening to Cao Daren's introduction, Chen Xin understood how the pipe jacking method was going on, but it was quite different from his original construction method.

With the development of science and technology, pipe jacking method is a kind of pipeline construction method to solve the problems of complex underground pipeline and inconvenient excavation.

The main way of construction is to excavate the operation well to reach the operation depth, and then use Jack and other tools to push the prefabricated pipeline one by one into the predetermined pipeline at the predetermined pipeline position to realize the pipeline installation.

Of course, this technology is mainly used in the installation of large pipelines, and according to the different ways of pipe jacking, it can be divided into mechanical excavation jacking, extrusion jacking, hydraulic mechanical excavation jacking and manual excavation jacking.

Chen Xin's shield tunneling method can also be regarded as mechanical excavation jacking.

"In this case, we need to take thermal insulation measures for the pipeline first, and then put it into the operation well for jacking operation." For the scheme given by Cao Daren, Chen Xin agreed after thinking about it, and soon thought of the problems that should be paid attention to in the construction.

When Cao Da heard Chen Xin say this, he nodded and said, "this is for sure. It's impossible to do insulation after the pipes are laid. That would be too troublesome."

Cao Daren agreed to carry out jacking operation after the pipeline was insulated, mainly because the working surface where they installed the pipeline was snow, not soil or rock, because if it was soil or rock, which was harder, the insulation material wrapped in the outer layer of the pipeline was easily worn during jacking.

"Can you do this? I'm not a professional engineer after all, and I have other things to do. " Chen Xin looks at Cao Daren and asks him.

What he said was the truth. Although he had been in touch with engineering construction when he was still at work, Chen Xin at that time was not the person in charge of directing the construction on site and had no experience in this field.

As for the other things he said, it's his cooperation with the country. The prototypes of the projects that need him to upgrade and improve have been transported to Linshi by military train with special forces before, and are now stored in the military camp.

And the prototypes of related projects previously accumulated in the urban areas are also preparing to be transported recently, so Chen Xin really needs to deal with these things during this period of time, so as not to delay the progress of national projects.

Although Chen Xin's appearance is only a surprise for the country, and the original project plan was designed without his help, it doesn't mean that Chen Xin can leave the work that should have been completed behind.

So Chen Xin plans to take advantage of the construction of the second heating hub and pipeline laying to clear up the backlog of work first.

Moreover, for Chen Xin, he has been busy with all kinds of things during the time when he came to Linshi for disaster relief, first the ambulance station, then the railway station and the heating hub. After this busy journey, he took a little rest on the new year's day, and was finally given a big "surprise" by Qin LAN and Mo Qingyan.This also makes Chen Xin want to take advantage of the opportunity that other things are on the right track during this period to change his mind by dealing with the backlog.

Chen Xin took the initiative to deal with the backlog of work, which is of course what the researchers around him can't wait for.

The researcher has been here since he came to Linshi. In addition to being responsible for contacting the urban area and the superior departments, the researcher has also helped Chen Xin a lot. At least he has contributed a lot to the construction of the heating hub.

In the past, he needed to use the communication channel of Linshi municipal government to contact with the superior departments. Now the special forces have come, which not only built the barracks, but also brought the communication facilities and set up the communication network, so that the researcher can use the communication equipment of the special forces to get in touch with the superior departments more conveniently.

This is a good thing for both the researcher and Chen Xin, which makes their communication with the superior departments much smoother. After all, it is somewhat inconvenient to borrow the communication channel of Linshi municipal government before.

The special forces don't have such troubles, because they are equipped with perfect communication equipment when they come, which also has the factor of ensuring Chen Xin's communication with the superior scientific research department.

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