Zheng Suo took the cervical vertebrae from Professor Chen's hand, looked at it, nodded and said, "Well, a few coffins and bones were placed in front of the tomb door, or in a conspicuous place, which is a bit interesting, I think this should be deliberately set up to deter people who try to enter inside." ”

"Yes, it should be a deterrent, and it also shows that the situation inside is complicated, and we can't be sloppy after we go in."

Zhang Gong said disappreciatively: "Such an environment, an organ or something, even if it is not rotten, it will definitely be invalid a long time ago, there is nothing to worry about." ”

"That's not what I mean, be careful, the beginning here is not too ideal, it's a tiger fish and an inexplicable stone tablet and this."

"Well, it's easy to say if it's on the water, we are sure to control the situation, the key is to be afraid of entering the water again, the underwater world is really complicated, there are too many unknowns there."

In the afternoon, all the preparations in the cave were completely over, and after Zheng coordinated the cleaning of the six corpses, the official work began. Zhang Gong stepped on the ladder and used the snake camera to reach through the gap above the tomb door to look at the structure: the top is a solid mountain, there is no gap, and there is a stone hole about 40 cm away from the top of the back, a total of five, and there is no door sealing stone behind the door. According to these points, Zhang Gong confirmed that the stone door was opened downward. Re-scanning by the 3D imager revealed no hidden channels through which the traps could be placed.

Seeing that Zhang Gong had no direction and was confused, Professor Chen said: "Lao Zhang, you first do a survey of the entire area, and then get the drawings out and then study the solution, maybe you are ignoring something." ”

"In ancient times, there were no electric and hydraulic devices, and the only power mainly relied on gravity, but here you can't see the space to provide gravity, only the corridor dozens of meters long behind the tomb door."

"The use of gravity as power should be unrealistic here, you think, if you use an iron chain or something to hang on this tomb door, in such a high humidity environment, it doesn't take a hundred years for the iron chain to rust and break, we can think of it, then the designer will definitely think of it, after all, there was no special metal such as stainless steel at that time to use, so you should think more about the natural resources here, to see if there is anything that can be used and converted into power."

"Yes, how did I ignore this, I understand, there is water here, water can be used as a power source, that is to say, this key point is still underwater!"

"Underwater?"

"Yes, do you think, is it easier to use the potential energy formed by the flow of water to open this stone tomb door or gravity?"

"Why did you inexplicably come out of the potential energy of the water?"

"Let's put it simply, according to the law of conservation and transformation of energy, water can produce mechanical energy in the process of flowing, such as kinetic energy and pressure energy, and can be converted into each other, so since this tomb is mainly water, not to mention that the waterfall water flow directly produces kinetic energy, that is, the pressure generated by the water level difference is enough to generate kinetic energy."

"Understand this, the key is how to raise the tomb door?"

"Don't interrupt me in a hurry, you can come up with the answer as soon as you understand the kinetic energy," Zhang Gong pulled Professor Chen to the side of the tomb door after speaking, gestured to the bottom and said: "Assuming that this stone gate is lifted up by the principle of levers, then the center point and the fulcrum will definitely be in the corresponding position inside, on the fulcrum, the pressure and strength of the water can be amplified through the lever, and then the stone gate will be lifted, which is understandable, right?" Then think about it the other way, if you want to put it down, will it be the same as the jack, and release the force that has been continuing in the back. ”

"Lao Zhang, your understanding must be wrong, first of all, how is the pressure of the water generated, this is a problem, even if the waterfall water flow directly impacts a certain stressed surface, I think it is not enough to lift these tons of stone gates, you have gone to the wrong place; However, from what you said about the kinetic energy and potential energy of the water flow, it reminds me that this stone gate should not be lifted up through these complex physical processes, but through direct mechanical energy, such as through the direct output of the winch and other forces, through this force to lift the stone gate into place, and then through some kind of wedge to prevent it from falling, my analysis is like this. ”

"It's as simple as that?"

"I think you're thinking too much, and you're thinking a little too much about the wisdom of the ancients, so you're getting yourself into it."

"So how do you verify it?"

"If you say that you have been bypassed by yourself, you still don't believe it, how can you verify it and ask me to say it? Use a snake camera to look along the bottom of the tomb door, and you won't know it? ”

Through the serpentine camera, Zhang Gong did see the wedge made of stone that Professor Chen said, and he believed it thoroughly.

Zheng also felt incredible, so he asked Professor Chen: "Professor Chen, how do you judge that this door is directly pulled up by manpower?" ”

"This is very simple, if you don't use the principle of gravity balance, it is difficult for the ancients to solve the power problem, the potential energy of the water flow may be relatively easy to obtain, but converted into a large enough mechanical energy, in this temporary conditions are not available, plus Lao Zhang said that there is nothing at the top of the stone gate, that is, the direction of the determination force comes from the bottom, that is to exclude the principle of gravity, since the potential energy of the water flow can not be counted, and it is not gravity balance, then it can only rely on brute force."

"Oh, then the snake camera didn't see any hanging ears underneath just now, how did the ancients hang this stone door?"

"Doesn't the upper back of this stone door say that there are regular round holes, it is estimated that the effect is equivalent to the pulley group, and it is also the deformation of the lever, so it is much easier to lift this stone door."

"And what's the wedge you just saw?"

"That is the stone door prepared before lifting, and after it is in place, you can lock this stone door in place with a hook or something pulled from the back to prevent it from falling."

"I'm curious now, how did this stone gate fit in the first place?"

"This stone gate is actually not a whole piece, there are not obvious splicing marks on it, it should be divided into three pieces for the convenience of transporting it from the outside, and then assembled after transporting it to the surface, and laid the planks and ropes at the bottom in advance, and then put these three stone slabs obliquely into it, and then polish it on top of it, so that the small gaps are not so obvious; After doing this, we will conduct a test, put the door to the end, and then lift it up by manpower. ”

"Then how do we open this tomb door?"

"Two methods, one is to connect the wire rope with high hardness steel such as channel steel, and then put it in from the gap, after supporting the stone door on it, make a bracket to lift the stone door through the gourd, and then take the wedge behind, and the rest of you will all know what to do, and the other is to dismantle the tomb door in sections, how to install it."

"Okay, then let's tear it down!"