Into Unscientific

   ".The excavator has dug to the top floor of the apse!"

   Hear this sentence.

  In the tent used as a temporary command point.

  Everyone's communication suddenly fell silent.

   Then Jiang Chenggu and Weng Tong looked at each other, Jiang Chenggu nodded towards Weng Tong, took a step forward, and asked the visitor:

   "Xiao Lin, how is the excavation going? Has there been any damage to the top floor of the apse?"

  The civil engineering man named Xiaolin shook his head quickly, and made a gesture with his hands in front of his chest, which looked like Xiongba was accumulating energy and releasing three points to return to his vitality:

   "Director Jiang, don't worry, we have prepared an excavation plan in advance."

   "The excavator stopped digging when it was 40 centimeters away from the top floor of the apse, and the equipment did not touch the main body of the apse."

   "A few minutes ago, we used drilling equipment to drill down carefully, and finally confirmed that there is indeed an apse of the Nine Palaces below."

   "Academician Zhang is now discussing the next construction plan with several senior engineers. In about half an hour, we will carry out the next excavation of the apse."

  Jiang Chenggu nodded lightly:

   "So it is"

  Although Jiang Chenggu came from the GWY office, since he was selected as the commander-in-chief of the Yongling excavation project, he himself is not ignorant of archaeological engineering.

   Actually.

  Jiang Chenggu graduated from the Huaxia University of Mining and Technology. When he has enough qualifications in the general office in the future, most of his external units will be related to mining or various projects.

   So he was clear.

  Although Sany 205 is a medium-sized excavator, it has a large tonnage and is quite rough and cumbersome to operate.

   But for those old drivers who can drive an excavator and light a lighter on an egg while ensuring that the egg does not break, it is not difficult to dig accurately to 40 cm above the apse.

   After all, the national team is playing today.

   Then Jiang Chenggu looked outside the tent and confirmed that many equipment in the foundation pit had indeed stopped working, so he said to Xiaolin:

   "In this case, Xiaolin, you can lead the way, let's go to the scene to see."

  Kobayashi's expression is positive:

"clear!"

   Then under the leadership of Kobayashi.

   A group of people quickly left the tent at the command point, walked forward for more than 100 meters, and entered the foundation pit surrounded by baffles.

  The size of the top of this foundation pit is about 60X60, with a total area of ​​about 3,000 square meters, slightly larger than half a football field.

The inside of the foundation pit is divided into two smaller layers, with a total depth of nearly 30 meters—in fact, the pit was originally divided into four layers, but two of the layers were expanded after the equipment entered the next layer, and only the support, There is also a water-stop curtain for the partition.

  There are two ways to go down the foundation pit, one is to go down through the side slope, which is also the upper and lower passages of engineering equipment.

  The other is to take a simple elevator, which is the kind of big iron frame that leaks everywhere but is extremely sturdy.

  Xu Yun and the others naturally chose the latter.

   After entering the elevator in batches, everyone went down to the bottom of the pit smoothly.

  The area of ​​the bottom of the pit is about 400 square meters, which is much larger than Xu Yun expected. The soil on the ground is mostly dark red and looks a little damp.

   Just got out of the elevator.

  Everyone saw Zhang Ziang wearing a hard hat not far away, discussing with several men who looked like engineers standing on the ground.

   I don’t know if it’s due to the habits of the civil engineer, but the body movements of several people are very rich, and they seem to be talking.

  Some of them sometimes flatten their palms in a swooping posture, and sometimes hold their hands high and spread their five fingers outstretched, as if wanting to hit the ground.

  Occasionally, some people knelt down and grabbed a handful of soil, holding it in their hands and saying something.

It is clear.

  They are discussing the next plan.

   "Academician Zhang!"

  Jiang Chenggu led the crowd forward quickly, first nodded to several engineers who had been in contact these days, then looked at Zhang Ziang, and asked:

   "Academician Zhang, has the excavation plan for the next stage been finalized?"

  Zhang Ziang nodded, stretched out his hand, pointed to another rectangular area surrounded by the cordon and said:

   "Director Jiang, look."

   "Below that area is the apse of the underground palace, which is the secret room where Emperor Jiajing and the three empresses placed their coffins. The cordon is based on the layout of the apse."

   "Our follow-up plan is as follows - first use manual means and hydraulic picks to assist, remove all the soil layers above the apse underground palace, and determine the location of the entire apse in the real environment."

  “In addition, while processing the upper soil layer, the construction team continued to dig and clean the left, right and rear sides of the apse.”

   “After excavating to the outer wall of the main body on three sides, start drilling to pump water, and pump out the accumulated water in the apse as soon as possible.”

  When I said this.

  Zhang Ziang also stepped on the soil under his feet in cooperation.

  If you don’t have an intuitive understanding of Zhang Ziang’s description, you can imagine a word in your mind:

   Concave.

  【Concave】The shape of the word is almost the top view of the foundation pit.

  The left, bottom, and right of the top view are the left, right, and rear sides mentioned by Zhang Ziang, and the upper part missing a horizontal line is the gate of the apse.

  Zhang Ziang’s plan is to dig down from the left, right, and back areas of the apse, and finally expose the upper, left, right, and back sides of the apse.

   If you still can't understand this, you can also try to recall the beds you sleep in.

  The head of the bed leaning against the wall is the entrance of the apse, and the upper, left, right, and rear directions that are in contact with the air are the four sides of the apse.

   It's just that only the surface of the bed is exposed to the air, what Zhang Ziang has to do is to dig out the other three sides.

   Then Zhang Ziang paused, and after Xu Yun and others understood the diagram, he continued:

   "After the four sides are cleaned and the accumulated water in the tomb is evacuated, we will carry out the final cutting and lifting."

   "At this point, Director Jiang, old man, technical means need your preparation and support."

  Jiang Chenggu and Weng Tongqiqi nodded:

"no problem."

  As one of the important participants in the project, they knew exactly what the technical means Zhang Ziang mentioned was the protection of cultural relics in the apse.

   To be precise, it should be.

  Protection of cultural relics and remains in the four imperial coffins.

   After all, it is different from the integrated copper hall where the "Yongle Dadian" is stored.

  Although the walls, floors, and ceilings of the apse are made of 'tiles' made of marble, they look much stronger than ordinary soil layers.

   But they are not poured in one piece after all.

  Combined with hundreds of years of water immersion, no one knows whether the apse will suddenly collapse during the lifting process-this probability is not high, but it is not zero.

  So out of safety considerations.

   Weng and the others arranged a series of emergency measures in advance, in order to prevent the emperor's coffin from being weathered or damaged after a small probability event happened.

   After all, those who engage in archaeology are old and steady.

all in all.

  After determining the plan.

  Zhang Ziang led the construction team to get busy.

be honest.

  The 40 cm soil is definitely not thick.

  In daily life, the height of a 24-inch monitor is almost 30 centimeters, and 40 centimeters is at most the size of a bottle of Coca-Cola above the monitor.

   But if you want to talk about how thin it is, it’s not that bad. Digging a hole is not as easy as many people think—even if there are not many stones in the soil layer.

  So in this link, the first thing to play is not a shovel, but a small hydraulic pick.

   beep beep—

  I saw seven or eight civil engineers holding a hydraulic pick vehicle similar to a tiller, loosening the soil on the ground like plowing.

  These old brothers also carried a small bucket similar to a pesticide box on their backs. There was a tube in the bucket connected to the hydraulic pick, and the two seemed to be a module.

  See this scenario.

  Xu Yun couldn't help showing a hint of curiosity in his eyes, and asked Weng Tong:

   "Uncle Weng, what are the barrels behind those operators for?"

  Weng Tong followed Xu Yun's direction for a few glances, and said simply:

   "That's a blend of anionic polyacrylamide and polyoxyethylene anhydrous polyalcohol stearate."

   "Polyacrylamide?"

  Xu Yun didn't hear clearly. Or maybe he didn't understand the substance Weng Tong said in the second half of the sentence, but he did know about polyacrylamide:

   "You mean soil scarifier?"

   Weng Tong nodded, thought for a while, and explained:

   "It can be regarded as a soil loosening agent, but it is much more efficient than agricultural ones. It is a liquid phase agent specially developed for archaeological excavation."

   "This liquid phase agent has strong penetration ability, and the soil loosening efficiency is about 1.5m/15g/6.8min."

   "At present, domestic relics, especially stone relics, can often be seen in the development process, but places like Sanxingdui still don't allow it to enter - after all, there are too many cultural relics in the soil layer."

  Xu Yun finally understood.

  Perhaps this is the industry barrier.

  What Weng Tong seems to be accustomed to, seems very strange to a layman like Xu Yun.

   About twenty minutes passed.

  The soil layer has been loosened.

   And at this point, it's time for the artificial team to appear.

  Because this link is not difficult, even Xu Yun, Academician Pan, and Lu Chaoyang, who have no experience in civil engineering, are allowed to carry a shovel on the stage and do a shovel dance class.

   Xu Yun drank three bowls of water while digging the ground, so this should be considered as three bowls of daily plowing, right?

that's all.

  With the passage of time, with the efforts of hundreds of people on the construction site, the four sides of the apse gradually revealed their true appearance.

   Four hours later.

  A longitudinal milling machine came to the 'neck' of the apse.

   The wheels of the milling and digging arm are covered with irregular nails, a bit like a twisted mace, which looks extremely hideous.

Of course.

   From this rough painting style, it is not difficult to see that this equipment cannot be used to cut marble passages—even though the marble passages are also one meter thick.

  This longitudinal milling machine is mainly used to correct the soil layer above the cutting area, so that the subsequent 'guillotine' for cutting the head can play a better role.

at the same time.

  The left, right and rear sides of the apse are also drilled with holes.

   Then three thick black pipes were connected into the three drill holes.

after awhile.

  With the action of the air pump, water gushes out of the borehole rapidly.

  The stagnant water was sent to the ground with the assistance of pressure equipment, and after passing through the filter screen to prevent cultural relics from being sucked by mistake, it was discharged into a pre-excavated pond.

  After being purified, the stagnant water will be discharged into a nearby river.

  Students who have watched the video of Huanong Brothers should know it.

  Water pump is such a thing, it seems to have a large amount of water, and the gurgling is really powerful.

  But it takes at least several hours or even half a day to pump clean water from an ordinary fish pond.

  The apse of Yongling Mausoleum is, in a sense, a large fish pond seven meters deep.

  So although the water in the apse is very powerful, it really takes a lot of time.

   According to Weng Tong's introduction.

  The case of water pumping closest to the size of the apse in archaeological history should be the tomb of King Liangzhuang.

  In April 2001, the Jingmen archaeological team conducted archaeological excavations on the tomb of King Liangzhuang located in Dahong Village, Changtan Town.

  Liangzhuang King is the grandson of Ming Chengzu Zhu Di. He was born in 1411 and was named Liang Wang at the age of 14.

  Feng Guo was in Anlu Prefecture, Huguang at that time, and took office at the age of 18.

  Died of illness at the age of 30, posthumously titled King Zhuang.

  Because he had no son, the kingdom was removed after his death.

  In addition to the early death of Liangzhuang King, his mausoleum is also very special—his tomb not only has no drainage system, but is also built where groundwater can be seen.

  The rumors of later generations are to express the idea of ​​"not giving up until the end of the world", but whether it is true or not, only the classmates who were the king of Liangzhuang in the previous life know.

  When the archaeological team opened the underground palace, the water in the tomb was 3 meters deep, half shallower than the 7 meters in the apse of the Jiajing underground palace.

  However, the underground palace of King Liangzhuang occupies more than twice the area of ​​the apse, so the volume of water in the tomb is about the same.

  At that time, it took the archaeological team 10 days to drain the accumulated water, and then they got a huge harvest in the tomb:

  There are more than 5,340 funerary vessels, with 16kg of gold, 13kg of silver, and 14kg of jade.

  However, the archaeological team used only one water pump at that time, and the power was also different from what Zhang Ziang and the others were currently equipped with.

   Therefore, although it was difficult to pump water in the Jiajing Houdian, the time did not last as long as ten days.

  Stay until the next morning.

   All the stagnant water in the apse was pumped out.

  Three small lampstands were pulled out along with the stagnant water, which seemed to be ornaments that had been corroded after being soaked in the stagnant water for a long time.

   About an hour after the stagnant water is pumped out.

  The longitudinal milling machine also happens to optimize the soil layer at the 'neck' to the best mechanism.

  “.”

  See this scenario.

  In the open space on the right side of the apse.

   Zhang Ziang, who had been waiting here for a long time, glanced at a middle-aged man with an ordinary face beside him, and politely greeted him:

   "Master Huang, I'll leave it to you next."

  Master Huang didn't seem to be good at talking. Hearing this, he just nodded dully, then walked to an operating table and sat on it.

  I saw him snapping and clicking on the console for a while, and entering some instructions.

   Less than a moment.

  嗞.

  A black square device placed on the top of the apse, about two meters in length, width and height, suddenly stretched out a mechanical arm.

  This robotic arm is about a dozen centimeters thick, also black, cylindrical in shape, thick at the back and thin at the front.

  The mechanical arm moved slowly, and finally stretched to the edge of the soil dug by the longitudinal milling machine.

   Then soon.

  The closed metal seal at the front end popped open to both sides with a "click", and a device similar to a spinning top, with a long metal strip similar to a cigarette behind it, slowly protruded out.

   After a while.

  Following the pressing of a certain key by Master Huang.

  In the long strip below the gyroscope device, a section suddenly spewed out.

   water column.

Normally.

  Even if the water from the high-pressure water gun hits the marble structure of the apse, it is difficult to damage the marble.

   Yet surprisingly.

   This tiny water column hit the marble 'neck' of the apse.

  It turned out to be like cutting tofu with a kitchen knife, easily cutting a deep slit in the marble!

  See this scenario.

  Whether it's Xu Yun, Zhang Ziang, or Weng Tong, everyone's expression is very calm.

   After all, this is an ultra-high pressure water jet.

  Ultra-high pressure water jet, referred to as water jet, also known as water cutting.

  It is mainly composed of a high-pressure pump, a CNC machining platform and a jet cutting head, among which the high-pressure pump is the main part that pressurizes the water flow.

  Ordinary water can be pressurized to 4000bar after passing through a high-pressure pump, and then sprayed out through a small nozzle made of ruby ​​or sapphire embedded in a metal material.

   Then add garnet or corundum as an abrasive, and the speed of the mixed composition of the 'water jet' can even reach 6 to 8 times the speed of sound.

  The water jet with this pressure can easily cut all kinds of stone or steel plate, which is a common processing method in industrial production.

   But in general.

  The common scenario of waterjet processing is mainly used for the processing of fine materials, which is commonly known as indoor small parts production.

  But not commonly used does not mean that it cannot be used. In 2019, China Construction Seventh Engineering Bureau has produced water jet equipment for outdoor construction scenarios.

  The standard depth of indoor water cutting is generally between 15-20 cm, some can reach 30 cm, and it can be increased to 60 cm in a short time without considering the cost of wear and tear.

The set of water jets of China Construction Seventh Engineering Bureau has been optimized by the Engineering Institute, which limits the divergence of the water column when the distance increases within the maximum range, and the effective cutting depth can reach 1.5 meters. Although there is no evidence, Xu Yun believes that the China Construction Seven rounds of urine, the actual maximum cutting depth of this thing should be able to reach more than two meters

  Although the depth of 1.5 meters cannot completely cut the apse, it can cover the top area of ​​the apse.

  If ordinary circular saws or frame saws are used in this area, it is easy for the marble to crack due to the resonance of the linear expansion coefficient.

  After all, there are many marble mineral particles, and the door panel in the apse has been soaked in water for so long, who knows how much it has changed.

   Just like chopping vegetables in daily life, the first cut is the most important.

   Twenty minutes later.

  The water jet cutting is completed.

  At this point, the rest is very simple.

  Zhang Ziang quickly sent someone to remove the water jet equipment and replaced it with a steel grit saw.

  Steel saw is a typical representative of frame saw, and the other is diamond saw.

  Compared with diamond saws, steel sand saws are more efficient and can cut large boards.

  However, its disadvantage is high loss, and it needs to use corundum and lime as additives during cutting, so the pollution is relatively large.

   But fortunately, there are not many environmental protection girls around today, no one will babble about howdareyou

   Another hour passed.

  The diamond saw is finished cutting.

  The entire apse has completely turned into a 'sugar cube' that can be moved at any time.

   Then Zhang Ziang looked at the top of the foundation pit, adjusted his glasses, and asked the assistant:

   "Xiao Lin, has the load-bearing board been arranged?"

   Kobayashi, who seems to be in his fifties, nodded quickly:

   "Report, the bearing plate has been placed!"

   "Has the moment coefficient been checked?"

   "It has been proofread three times. This is the proofreading responsibility statement, and the responsible person has signed it!"

   "What about the anchor?"

   "It's okay."

  Seeing this, Zhang Ziang took a deep breath and ordered:

   "In this case, ZAT18000H listens!"

"three"

"two"

"one"

   "Start lifting!"

Note:

  Esophageal cardia achalasia, non-atrophic gastritis and erosion in the stomach, not particularly serious but troublesome diseases.

  Do a 24-hour electrocardiogram tonight, and ask for leave tomorrow—I know what you guys want to say, but even if you ask for leave, you only need to update 6800 a day.