Chapter 493 Academician Zhang, I understand
In the open space.
Looking at the detection results of the gravity gradiometer around me.
Zhang Ziang's expression couldn't help but be a little subtle.
Yes
How could I forget this?
indeed.
For the mapping results of ordinary gravity remote sensing, it is undoubtedly very difficult to break away from the tomb passage and dig another pit to enter the tomb chamber.
After all, the results of microgravity remote sensing detection are very vague and can only determine the general orientation and structure of the tomb.
A very representative example in this regard is the famous Zhaoling Mausoleum.
Zhaoling is the joint burial mausoleum of Emperor Taizong Li Shimin of the Tang Dynasty and the Changsun family of Empress Wende. It is located on the main peak of Jiuwei Mountain in Yanxia Town, Liquan County, XY City.
From the domestic mastery of microgravity remote sensing technology to the present, the archaeological community has conducted no fewer than ten technical explorations.
The most recent time was at the end of 2021, when the exploration team used active sources to collect seismic data.
At that time, the survey team laid out seismic data collection lines along the mountain, and used seismic reflection and tomography to characterize the shape of the Zhaoling tomb in detail.
Then use gravity and magnetism to measure the width and height of the underground palace entrance, and then use geological radar and high-density resistance measurement methods to measure the extension length of the underground palace tomb passage.
Finally, check whether there are niches, side rooms, etc. after the tomb passage extends in.
But even such a detailed exploration can only draw one conclusion in the end:
The tomb passage is intact.
That's right.
Just these four simple words.
At most I can add to you that there are no robber holes in the mountains on both sides of the entrance to the tomb.
As for the deeper structure of the tomb.
Sorry, except for determining the location of Stone Chamber No. 1, there are no detailed measurement results of the Main Cemetery Palace - not because of confidentiality, but because they cannot be detected.
In a sense.
The images produced by microgravity remote sensing mapping are actually somewhat similar to the shadows of fish underwater.
That is to say, the general outline can be distinguished, but the specific internal structure is very difficult, and the internal organs cannot be understood.
in this case.
If you dig a hole at will, if it is not kept intact, a certain supporting structure will be accidentally damaged, causing the entire underground palace to collapse.
Or the breach may be greater than expected, causing severe weathering damage to the cultural relics inside.
In addition, the Yongling Underground Palace will inevitably be used as a scenic spot similar to Dingling in the future. The entire building can only be excavated with protective methods and cannot be destroyed without thought and violence.
Therefore, from the beginning, Zhang Ziang subconsciously applied previous concepts.
But now after Xu Yun mentioned it, he finally realized it
This time they are not using traditional microgravity detection equipment, but a gravity gradiometer!
The test results of this thing are another concept.
As long as you can find a suitable location, you can dig a robbery hole. Ahem, dig an artificial tunnel to go down.
Think of this.
Zhang Ziang quickly cast an apologetic look at everyone, turned around and started operating the picture board alone.
Then quickly.
A structural diagram appeared on the screen.
Zhang Ziang then used a stylus to draw a vertical line above the apse, but soon shook his head:
"It's easy to find the location to break in, but you can't dig a hole directly. What should I do?"
Weng Tong on the side glanced at him, changed his posture on the chair and asked:
"Lao Zhang, what's going on? Why can't you just dig a hole?"
Zhang Ziang frowned and was silent for a moment, then gestured on the screen and said:
"The first is the soil problem in Yongling. Didn't I say it before? The soil here in Yongling is a saturated soft soil layer with a void ratio of about 1.3 and an undrained shear resistance of 22.45KPa."
"This is a standard lagoon soil formed in the late Quaternary period. There will also be carbonate accumulation in the soil layer, and the overall soil is not stable."
"If you dig holes at will, there may be a risk of collapse similar to that of tomb passages."
"And there is."
Zhang Ziang paused as he spoke.
Draw a circle on the bronze underground palace below the Nine Palaces Underground Palace, focusing on the previous point:
"Look, if we just drill holes directly above the Nine Halls Underground Palace, what should we do with the copper underground palace?"
"It would be okay if the protective layer of the copper underground palace is only copper. If we plan enough, we are fully capable of cutting a small opening and taking out the "Yongle Dian" inside."
"But don't forget, the inner layer of the copper underground palace is covered with golden nanmu."
Everyone was stunned for a moment, and then they reacted one after another.
Yes.
If it is just a simple copper underground palace, then the operation can indeed be very simple:
The project team could have broken into the Nine Halls underground palace first, then dug six meters down, and then cut a small hole in the copper underground palace to come out.
Then use equipment or personnel to enter the interior and move out the box containing the "Yongle Dadian".
But the problem right now is.
In addition to the outer copper shell of the copper underground palace, there is also golden nanmu on the inner layer that is highly suspicious of dragon scale patterns.
The nanmu structure of this size is the only one in the world, and it is a very precious cultural relic in itself.
If you cut a hole in it.
Firstly, it is easy to damage the integrity. Secondly, with the influx of air, it is easy to say that "Yongle Dian" is protected by a metal box, but the rest of the golden nanmu inside may be in danger of weathering.
Think of this.
Jiang Chenggu also realized the seriousness of the problem and couldn't help but look up at Zhang Ziang and asked:
"So, Academician Zhang, what do you think?"
Zhang Ziang pondered for a moment and did not give a direct answer.
Instead, he picked up a pen and drew a simple diagram on the picture board:
"Director Jiang, Academician Pan, you guys, watch."
“When viewed from a top view, the entire Yongling Underground Palace looks more like a person lying down than a character [A] with one horizontal line removed.”
"The apse is the head, the left and right side halls are the two hands, the aisles are the bones of the shoulders, the middle hall, the front hall and the tunnel form the chest and lower body."
When Jiang Chenggu saw this, although he didn't understand what Zhang Ziang wanted to express, he still nodded in cooperation.
Objectively speaking, the layout of Yongling does look quite personal.
Then Zhang Ziang patted the back of his head with his palm and gestured:
"The copper underground palace is located under the apse, just like a pillow for a person lying down."
"If you want to take out the pillow core when the pillow cannot be broken open, which is the "Yongle Dadian", the more common method is, of course, to pull the pillow out from under the person's head."
"But the problem is that once the pillow is empty, the person's head will have no support, and the head will easily hit the mattress below - you can imagine this picture for yourself."
This time.
Even more people nodded.
After all, this example is closer to life.
Then Xu Yun's eyes stayed on Jiang Chenggu's palm patting the back of his head for a while, and he said thoughtfully:
"Academician Zhang, I understand."
"So what you're saying is that we can't pump the pillow too fast, and it's better to put a substitute under the 'head'?"
Xu Yun thought that he had understood what Zhang Ziang wanted to express, but unexpectedly, Zhang Ziang shook his head vigorously after hearing this:
"Dr. Xu, you know der, cough, but you misunderstood."
"What I want to say is actually"
"We can try to cut off the head, take out the pillow, fill the pillow part with soil, and then sew the head back on."
Xu Yun:
"????"
Actually.
Xu Yun was not the only one who looked confused at this time.
Including Jiang Chenggu, Academician Pan, Weng Tong, Huang Yuting and others, everyone's expressions were surprisingly consistent:
Boss, what are you talking about?
However, Zhang Ziang was not surprised by everyone's reaction. He smiled very indifferently and continued to explain:
"Everyone, my idea may sound a bit fanciful, but I personally think it is very practical."
"First of all, as mentioned above, the best way to protect the golden nanmu inside from accidents is to move the pillow, that is, the copper underground palace, to the ground for processing."
"But whether it is to 'pump' directly or to hold the head and move it, the actual operation is very difficult."
"This is especially true when the soil around the copper underground palace has been penetrated by accumulated water. The principle of the subway is not applicable to the current situation."
"So in this case, can we dig out the head in the apse first, and then lift the pillow to the ground?"
"Now that we have precise results from gravity gradiometer mapping, I personally think this is a completely feasible solution."
After listening to Zhang Ziang's words.
The scene suddenly fell into silence.
Everyone was turning their heads rapidly, thinking about the feasibility of Zhang Ziang's plan.
Strange to say.
It was obviously a very outrageous plan, but the more Xu Yun thought about it, the more likely it was to be realized.
Zhang Ziang has already mentioned the reason for "cutting off the head", and Xu Yun agrees with this aspect - with the current soil structure, it is almost impossible to dig beyond the apse to dig the copper hall.
Therefore, his main consideration is whether the plan has the corresponding operating conditions.
The first is the volume of the apse.
According to the survey results, the size of the apse is not large.
The area occupied is about 75 square meters, which is a rectangle with 5X15 specifications.
Its height is just over five meters, which means its volume is about 370 cubic meters. The data is quite satisfactory.
The second is the layout of the apse.
Mentioned before.
There were not many funerary objects in the apse, only the coffins of Jiajing and the three queens.
Other than that.
There are no other large cultural relics in the apse.
After all, this is the area where the emperor's coffin is held. It is impossible to store many funerary objects - the funerary objects are all placed in the other halls.
The same was true for the back hall of Dingling.
Apart from the coffins of Emperor Wanli and the two empresses, there are no other items in the apse of Dingling. Today, Dingling is also an attraction open to the public, and only replicas of the emperor's coffins are stored in the apse.
More than 3,000 cultural relics were unearthed before and after Dingling, only 11 of which were found in the apse. This number also includes many lamps.
At the same time, let’s take the back hall of Dingling Mausoleum as an example.
The interior decoration of the apse of Dingling is extremely monotonous, with gray and white marble throughout and few stone carvings on the walls.
To put it bluntly.
Except for a few coffins, there are few particularly precious cultural relics in the entire apse.
Not to mention that there is a thick layer of "cervical vertebrae" between the apse and the front aisle, which is the door of the apse.
Displayed based on detection results.
The thickness of the apse door is nearly one meter, and it is fully enclosed.
That is to say, as long as the technique of cutting off the head is superb enough, there is no need to worry about the other eight small chambers being affected, and it will be as smooth as Louis XVI's experience.
So in terms of conditions, the apse fully meets the requirements.
Then Xu Yun picked up the mineral water and took a sip. After moistening his throat, he asked Zhang Ziang:
"Academician Zhang, I personally have no objection to the excavation conditions, but I want to ask you something."
"After all, the apse is located nearly thirty meters underground. Is it technically feasible to completely cut it off from the main body of the underground palace and transport it to the ground?"
"Or is your idea to divide the apse into several parts and transport them to the ground, and then the structure can be spliced and restored?"
Hear this.
Weng Tong and others also turned their attention to Zhang Ziang, waiting for his answer.
Mentioned before.
The depth of the underground palace is 27 meters underground. Counting the thickness of the apse itself, the excavation depth is actually even more than 30 meters.
This kind of depth is almost equivalent to ten floors in an ordinary residential area, and the technical requirements are obviously very high.
"Technical aspects"
Zhang Ziang repeated the word, with a strange smile on his lips:
"Dr. Xu, you can take out your mobile phone and search for a keyword called 'Yujiapu Station Depth'."
"After reading the search results for this keyword, you will not have much doubts."
Xu Yun couldn't help but be stunned.
Then he took out his mobile phone and entered the entry according to what Zhang Ziang said.
After a while.
A huge title appeared in front of Xu Yun:
[The world’s largest and deepest underground high-speed rail station, China’s first “shell” building.]
at the same time.
Zhang Ziang's voice also sounded in Xu Yun's ears:
"Yujiapu Station. Oh, it seems to have been renamed Binhai Station now. It is a standard deep commercial building."
“Its deepest depth is 60 meters, and the foundation pit of the hub project’s intercity station platform is 25 meters deep, and many of the underground continuous walls used during construction were poured and then hung down.”
"In addition, during the construction process, the China Railway Construction Team encountered many giant stones, the largest of which reached 14.2 meters in length from head to tail."
"However, after discussion, the China Railway Construction Engineering Group responsible for the construction did not blow it up into pieces. Instead, it transported the entire stone block from a depth of 45 meters to the ground intact."
"The length, width and weight of this stone far exceed the corresponding data of the apse. Such a heavy stone can be transported, let alone an apse?"
"Similarly, there is the world's largest stone dragon in Jiangyao Village, Handan City. It was buried 15 meters underground and was 369 meters long. It was unearthed in 2002."
"At that time, CCTV's "Into Science" wanted to find the source of stone dragons, and even filmed seven special episodes for this purpose - and finally came up with two guesses, either man-made or naturally formed"
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"Of course, in practice, it is definitely not as easy as it sounds. Strict calculations are required in terms of torque and load-bearing capacity, otherwise it is easy to cause accidents - aren't there a lot of videos on the Internet of tow trucks overturning during operation? Those Basically it’s all about torque. ”
Seeing Zhang Ziang talking eloquently, Xu Yun couldn't help but be a little surprised.
Is the current civil engineering guy so awesome?
He thought that a building of the size of the apse could only be broken into small pieces and moved out.
Then a while passed.
Jiang Chenggu also raised his head and looked at Zhang Ziang:
"Academician Zhang, how sure are you of this plan?"
Zhang Ziang scratched his head and considered:
“The most difficult part of the whole process is the calculation of the torque of the lifting equipment, and the rest is trivial.”
"The specific plan still needs to be discussed, but I am quite confident in the success rate - if I insist on a higher number, I would be more conservative and say 9.95%."
Jiang Chenggu:
".?"
9.95% is still conservative?
Are you selling second-hand mobile phones here?
However, Jiang Chenggu did not spit out the trough. He only thought about it for a moment and looked up at Zhang Ziang again:
"Okay, in that case. Academician Zhang, please come up with a plan as soon as possible, and I will submit it to the superiors for demonstration."
"We have a special channel for this project. If there are no problems with the plan, the results should be available soon." (End of Chapter)