The first large-scale shield machine with a diameter of 6 meters 3 arrived at the tunnel construction entrance of Dongyang City, where all preparations were ready, waiting for the arrival of the shield machine.

Seeing this shield machine, Tian Hao found that his worried heart gradually let go, and waved his hand: "Cooperate with the personnel of Jiuzhou Heavy Industry to do a good job in the assembly of the shield machine." ”

The big crane gets to work, and the shield machine is lifted down from the big transport truck for reassembly. In order to facilitate transportation, the shield machine, which was originally a monolith, was dismantled into several parts.

After transportation to the construction destination, it can be easily reassembled. The personnel of Jiuzhou Heavy Industry worked and commanded the hoisting of the shield machine. Many people from Dongyang Metro Company are cooperating.

Looking at the scene in front of him, a high-level executive said: "Mr. Tian, our first shield machine has finally arrived, and it will solve our big problem!"

Tian Hao said: "It is the first one, according to the contract, another one will be delivered to us this month, with these shield machines, our tunnel construction no longer needs to use the traditional drilling and blasting method, it is estimated that the amount of excavation in one day can reach us in the previous week."

Jiuzhou Heavy Industry's large-scale shield machine, the highest record is to dig through a mountain within a week, at that time, many domestic newspapers reported this matter, Tian Hao also read the report.

I was really looking forward to digging through a mountain in a week, but I wonder how they will be in the construction of the subway tunnel.

Or the senior next to him, happy in his heart, and a little worried, "Mr. Tian, Jiuzhou Heavy Industry's large-scale shield machine, I have long heard of the excavation efficiency, I heard that the efficiency is much higher than that of the imported shield machine, but I don't know how much impact it has on the settlement of the ground." ”

Although he has a relatively full understanding of the performance of the shield machine, after all, he has not gone through practice, Tian Hao is also a little worried, and looks up into the distance.

Less than one kilometer, is the ancient city wall of Dongyang City, and this tunnel is just going to pass through this ancient city wall, and then stretch all the way, the length of the tunnel in the urban area is twenty or thirty kilometers.

These 20 to 30 kilometers of tunnels not only pass under many high-rise buildings in the urban area, but also pass under many historical buildings and historical places of interest.

If you say that you are not worried in your heart, it must be false.

Tian Hao also knew that the subway route had been repeatedly revised to avoid historical buildings and places of interest as much as possible, but some of them could not be bypassed, so he could only pass through them head-on.

"Give it a try, and if it really doesn't work, find a way. Tian Hao thought so in his heart.

The first large shield machine arrived, it was assembled, and then, within two days, it was put into use, entering through the tunnel entrance, diving headlong into the depths of the earth, and began to rumble, and a large amount of earth, sand, and even rock debris was transported.

It is like a giant beast, moving at a speed of several meters per hour. Truckloads of mud and gravel were transported out of the tunnel.

The length of the circular tunnel with a diameter of 6 meters 3 is lengthened every moment, and the shield machine not only advances very fast, but also fixes some supports, and then, there are engineering equipment behind the construction, such as the spraying of cement mortar on the cave wall, the placement of the steel skeleton, the pouring of concrete, and so on.

Since the start of the shield boring machine, Tian Hao personally entered the construction tunnel every day, personally watched the construction situation, and was a little happy to see the progress so fast.

But every time I came out of the tunnel and saw the ancient city wall in the distance, my heart was full of worry, I don't know if this shield machine will cause ground subsidence when it passes through the city wall, and how much it will settle.

Some media in Dongyang City, such as "Dongyang Daily", Dongyang TV, etc., have reported on this shield machine.

While everyone felt that the construction of the domestic large-scale shield machine was progressing rapidly, the words were also full of worries. Dongyang City is not an ordinary city, it is a famous historical and cultural city, but don't let those thousand-year-old buildings be damaged because of the construction of the subway.

To be on the safe side, the Dongyang Municipal Bureau of Cultural Relics Protection began to place ground sensors around the ancient city wall to monitor the subsidence of the ground.

In the event of an anomaly, it is estimated that experts from the Bureau of Cultural Relics Protection will intervene to stop the construction of the tunnel on the grounds of affecting the historic buildings.

Before purchasing the large shield machine of Jiuzhou Heavy Industry, Dongyang City consulted or contacted several manufacturers of large shield machines in the world, including Japan's Yamazaki Heavy Industries.

They are no strangers to Jiuzhou Heavy Industry, and even regard Jiuzhou Heavy Industry as a competitor in the field of large shield machines. Last year, Yamazaki Heavy Industries was preparing to build a factory in Shenhai City to produce heavy engineering equipment, but lost to Jiuzhou Heavy Industries when it bought the factory of Kim Byung-nam, a South Korean.

In the end, they were still unwilling to give up the huge market in China, or invested heavily in the construction of a specialized heavy engineering equipment manufacturing plant in Shenhai City, which was not far from the factory of Jiuzhou Heavy Industry, less than a kilometer in a straight line.

After such a period of construction, most of the construction of their factory has been completed, and several large factories have been capped, and they have begun to enter the installation stage of water, electricity and air in the plant.

Maeda stayed at the factory for the past two days, mainly to check the progress of construction. Now in the office, he is listening to the report of his subordinate Matsumoto Teru.

"Your Excellency, the first large-scale shield machine produced by Jiuzhou Heavy Industry for Dongyang City has been put into tunnel construction a few days ago, and it is currently progressing rapidly, and it has been excavated for a distance of two or three hundred meters in a few days, and the media in Dongyang City are making a big report. ”

Maeda Zhitai said disdainfully: "This time, Jiuzhou Heavy Industry will definitely pay a heavy price, and they dare to accept such customers." ”

As early as half a year ago, Tian Hao had been in contact with Maeda Zhitai. To be precise, it was Maeda Zhitai who came to the door, and he got the news that the construction of the subway in Dongyang City was imminent and a large shield machine was needed.

After a lot of hype, Dongyang City also showed the intention of buying, but Tian Hao appeared more steady, especially proposed that when the shield machine is constructed, it can not affect the historical buildings on the ground, and the ground settlement caused by it cannot be greater than 5 mm.

Maeda Zhitai was not ashamed, and kept saying that there was absolutely no problem, and the shield machine they produced and manufactured for tunnel construction basically had no impact on the ground, and the ground settlement would never exceed 5 mm.

When this requirement was to be written into the contract, and if the land subsidence was greater than 5 mm, Yamazaki Heavy Industries would be held responsible, and a high financial compensation would be paid for the damaged historic building, Maeda retorted.

And laughed at Tian Hao, no shield machine in the world can do this, and it is very normal for the ground to settle at about 10 mm.

As a result, the business naturally collapsed.

Later, Maeda Zhitai saw that Dongyang City ordered 6 large shield machines from Jiuzhou Heavy Industry, and Jiuzhou Heavy Industry promised that the ground settlement caused by the construction of the shield machine would not be greater than 5 mm.

He ordered Matsumoto Hui to keep an eye on the dynamics of Jiuzhou Heavy Industry and Dongyang City, and after listening to Matsumoto Hui's report, Jiuzhou Heavy Industry's shield machine was under construction in Dongyang City, Maeda Zhitai laughed.

"Jiuzhou Heavy Industry, I really don't know how thick the sky is!"

Matsumoto Hui also gloated and said: "Your Excellency, in a few days, that shield machine will approach the ancient city wall, and when the time comes, it will cause a large area of ground subsidence, and then there will be a good show." ”

"Haha......" Maeda Zhitai laughed proudly, and after laughing, he waved his hand and said: "Matsumoto, you go to Dongyang City in a few days, take pictures of the land subsidence and the cracking of the ancient city wall, and bring the photos back to me, I will be of great use." ”

Matsumoto seemed to realize what his boss was going to do with these photos, and immediately agreed: "Your Excellency, in a few days, I will quietly go to Dongyang City and take all these pictures back." ”

Ha ha......

Thinking about the means he was going to take, Maeda Shitai laughed again, and it was clear from his malicious laughter that he was going to play some kind of trick.

……

Deep Sea City.

Today, Tang Fei wore work clothes and a hard hat, and followed Chen Guihong into the subway tunnel under construction, which is Shenhai Metro Line 2.

The construction is a large shield machine with a diameter of 6 meters, "Rainbow". At present, Jiuzhou Heavy Industry has delivered two "rainbows" to Shenhai City, and the third is estimated to be delivered next month, and these two "rainbows" have been put into the construction of subway tunnels.

One of them has already excavated more than 3,000 meters, and the other has already excavated more than 1,000 meters. Under the leadership of Chen Guihong, walking into one of the tunnels, Tang Fei saw a beautiful cement tunnel in front of him.

The "Rainbow" is constructed in front, through a huge cutterhead with a rotating diameter of 6 meters, the mud and stone are cut down, and transmitted out, and then, the construction personnel install tunnel supports in the back, spray cement mortar reinforcement, and a little later, the workers are placing the steel skeleton and pouring concrete.

Tang Fei said: "Brother Chen, your tunnel is really beautiful, reflecting a high level of quality. ”

Chen Guihong said with emotion: "The biggest contributor to the construction of the tunnel is your 'Caiyun' shield machine, which excavates the standard tunnel, and we are very convenient for the placement of the tunnel steel skeleton and the pouring of concrete. ”

The two watched the construction of the tunnel and talked from time to time. Chen Guihong also asked with concern, "Brother, I heard that the first large-scale shield machine you manufactured for Dongyang City is already under construction, and its performance should be very good." ”

Tang Fei said: "Its construction speed is still very fast, but in a few days, it will usher in the first real, huge test!"

"Oh. Chen Guihong looked at Tang Fei puzzled.

Tang Fei explained: "Dongyang City is extraordinary, it is a famous historical and cultural city, there are a lot of ancient buildings in the city, a lot of places of interest, subway tunnel construction, how much will have a certain impact on the ground, if you want these ancient buildings and places of interest are not affected, when the shield machine is constructed, the ground settlement can not be greater than 5 mm." ”

Can't be bigger than 5 mm!

Chen Guihong was really worried about Tang Fei, "Brother, this requirement is too harsh, can your shield machine do this?"

Tang Fei was not completely sure, and said slowly: "In a few days, the shield machine will be excavated under the first section of the ancient city wall, and when the time comes, I will take a look." ”

……..

Today, we will continue to see three more, and the first one will be sent