In my theory, there is a phase of construction of the pyramid which corresponds to the elevation of the megaliths mainly of the upper chamber and of the mortuary complex, in which they had to vary the level of the water circuit made up of the descending gallery , the lifting well (still to be discovered), the ascending gallery and the horizontal gallery. from 21 m to -12 m approximately.
To empty this circuit, the builders disposed of an evacuation pipe at the 7 m level which became the “Al Ma’mûn passage”, but to further lower this level from 7 to -12 m, the best way was to evacuate the water from the top of the descending gallery = “the entrance”, and to recover it easily thereafter to store it in a tank located at the same level.
The visible vestige of the entrance as well as the volume detected by “scan pyramid” clearly explain to us how this tank could have worked.
There is above the entrance to the descending gallery, a farm in superimposed double-rafters, what we do not see is the vault which has now disappeared which extended these rafters to the north over a length of about 5 m . There is visible the trace of the abutments on which the rafters rested and we can still see the remains of 2 rafters which were broken, so we know their thickness.
Image credit Frank Monnier
It is highly probable that the missing rafters were broken by those who partially dismantled the pyramid, believed to be the workers of Al Ma’mûn.
This vault means that during the construction of the pyramid the space above was covered with building blocks and this vault protected the space below in which human operations could take place.
This space was therefore closed on the north side throughout the construction of the pyramid by the filling blocks covered with the facing blocks. This north wall was to be crossed by a corridor of which we will never know anything, allowing access from the outside to this room and giving it a little light.
To the south of a stack of 3 large lintels that are now visible, the “Scan pyramid” project detected the presence of a void:
Image Credit CEA France
The image above suggests that this volume has two parts, the southernmost one is about 2 m wide by 10 m long which communicates to the north with a wider volume about 4 to 6 m and about 2 m long.
According to CEA observers, the height of this volume would be around 4 m.
The southern part, having about 2 m at its base should therefore rise in corbel in a manner similar to the “niche” of the lower chamber, on the other hand the much wider northern part should be covered by a vault similar to the one whose the vestige is visible at the entrance, releasing a fairly small floor area 8 to 10 M² but sufficient however to allow operators to work. The appearance of this volume seen from the north could resemble the niche of the lower chamber:
A view from the south, removing part of the masonry, shows the rear of the crenellated lintel, cleared of the vault and moved to the west resting on the limestone block of Turah:
Below the crenellated lintel one could discover a sort of “plughole” made of a recess closed by a block, which could have been moved from the north volume using a lever resting on the third lintel.
In the visible part 3 lintels which follow one another by superimposing each other close this volume, these lintels located under a vault have never had to bear a load above, however they are very (too) large, the first lintel measuring 2.8 m high, 3.7 m long and 1 m thick, each weighs about 20 t.
Why this debauchery of material in this place?
The only logical explanation is that they had to contain a force created by hydraulic pressure in the descending gallery which they cover.
In the sequence of elevation of the megaliths, the descending gallery as well as the volume to be discovered were filled with water, the entrance being at the height of 15 m and the water level in the circuit being able to reach 21 m (level of water in the horizontal gallery), these lintels had to contain the pressure of a water column 6 m high.
To hold 6 m of water column it was necessary not less than 6 / 2.5 (density of the stone) = 2.4 m of stone vertically, but this slab being inclined at an angle of 26 ° it was necessary that its height is not less than 2.4 / cos (26 °) = 2.7 m for the first lintel and keep the upper face of the next two lintels at least at the same level as that of the first.
But here again we see that instead of maintaining the level of the following lintels rises, why?
This is because there was behind this wall formed by the 3 superimposed lintels a height of water which could in certain circumstances reach the level 22 m.
So these 3 superimposed slabs must by their weight contain the horizontal force created by the water column contained in the volume to be discovered. This wall being approximately 7 M² the horizontal force which then pushed it towards the north was 21 t, as the lintels are inclined by 26 ° it is necessary that the cumulative weight of the three lintels is not less than 21 / sin 26 ° = 50 t.
The weight did not scare the builders of the pyramid, to say the least, and the mass of the three lintels that can be observed meets the requirement.
The floor of this rear volume to be discovered that can be described as a tank should be horizontal with a slight counter slope to be able to be emptied in full gives in the northern part on a sealing device, a (large) plughole, allowing at will to retain water in this reservoir or by lifting it to let the water from the reservoir flow into the descending gallery.
It is not by chance that in this place G. Dormion (La Chambre de Cheops p 283) observed an open joint around the fifth lintel (from the entrance) covering the descending gallery.
These open joints could have allowed the water contained in the reservoir to flow into the descending gallery.
Access to this reservoir from the now destroyed chamber located in the northern part, could be achieved through the “crenellated lintel”.
We notice embedded in the ridge of the vault a space which has been closed by a lintel bearing notches which show signs of wear generally called the “crenellated lintel” (for a better understanding, the visible vault has been removed from the drawing).
About 3.15 m long, 1.87 m high, unknown thickness but probably around 1 m.
To a depth of 20 to 35 cm, crenellations were cut in this lintel, the function of which remained enigmatic for a long time.
Curiously, this lintel only fits under the rafters of the vault in the southern part by 20 cm which is unusual, it rests on a block of fine Turah limestone, the very smooth horizontal surface of which is pierced with 3 holes of 7 cm in diameter.
I make the following interpretation = we are in the presence of a sliding watertight door!
Here is how to operate this door:
With a lever resting on the third lintel, the most southerly, this crenellated lintel can be pushed back approximately 25 cm towards the south by freeing it from the rafters, the 3 holes could have received copper or granite rods serving from an anchoring point to a fulcrum for a lever which engages in the “crenellations” could have made this door slide in the EO axis by freeing a passage. Obviously we do not know the configuration of the volume in which this lintel could move, but we can anticipate that it would have released a sufficient passage to allow operators access to the tank.
The descending gallery is 1.2 m high, being inclined at 26.6 ° the height of the passage for a man in a vertical position is 1.2 / cosine (26.6) or 1.34 m, a child can stand there easily.
G. Dormion in his analysis of the descending gallery noticed a lintel, the fifth exactly from the entrance, the joints of which are free of any mortar and which is only 75 cm wide. This void around the lintel could well have allowed water to pass between the reservoir and the descending gallery. Probably a plughole (which remains to be discovered) located on the floor of the reservoir above this lintel made it possible to control the quantity of water to be discharged into the descending gallery.
This bung could have been easily operated from the entrance chamber by a lever resting on the third lintel, this lever could have been linked to the bung by a rope passed under rods engaged in holes close to its top like you can see them on the rest of the “harrow” found in the entrance.
Thus with this device, by passing the water from the descending gallery to the reservoir using a chain of buckets, the circuit could be emptied from the 7 m level to the -12 m level, to refill it by then by opening the drain. The section of the lifting shaft being 4 M², it was necessary to be able to store (7 + 12) × 4 = 76 M³ in the tank, which corresponds more or less to the volume detected by pyramid scan.
The piece of broken granite found in the entrance that the consensus of archaeologists qualified as a “harrow” (from the harrows chamber) could well have played the role of a valve to close the descending gallery at its upper end approximately at the height of the first lintel level + 15 m, but all the device that could have gone with it was destroyed by the demolishers.
Indeed, it was necessary to close off the top of the descending gallery at the 15 m level when the water level in the circuit could reach 21 m.
This gate would have been of a width very slightly greater than the width of the gallery and “pushed in” by force by rotation to obtain the seal, then secured by a wedge resting on the north masonry.
The opening of this valve had to be sudden to create a front of depression in the water circuit, this was easy to obtain with a well-placed mass shot which would have made the blockage yielded by friction, after having removed the safety wedge.
** Since the discovery of the “big VOID” by the “Pyramid scan” project, the proponents of the ramp theory have been looking for a secret passage in the entrance which would lead via a hypothetical secret gallery passing above the great gallery to the “Big Void” »Spotted by the scan pyramid project.
They have an absolute need for it, because in the absence of this entrance followed by a secret gallery, the only possible access to the Big Void would be vertically above the masonry, as yet unexplored, which is around the passage behind the niche. of the lower chamber . And by logical consequence there would be a vertical well in this masonry (even without having seen it) and a vertical well in the center of the pyramid causes the total collapse of all the theories based on ramps!
So this sliding door (the crenellated lintel) would be welcome for these theories whose supporters could adopt it immediately after reading this article, as the secret entrance they have always dreamed of.
But twice unfortunately, a “secret” entrance whose opening mechanism is spread out in the eyes of all, it does not look very serious on the part of the manufacturers, although to date thousands of people have passed by without understanding it and the configuration of the void found by scan pyramid , only leaves a horizontal corridor 10 m long, completely unsuitable for leading to the big VOID.
We wonder about the circumstances of the disappearance of the double-rafter vault that covered the entrance, I propose the following scenario:
The demolishers entered the pyramid through the Al Ma’mûn sape, they discovered the descending gallery after having gone through the service shaft, going up it they found it blocked by a granite valve, they did not know what it was behind a much sought-after treasure?
The granite is very hard, they do not have the tools to drill it, they cannot exert sufficient force to break it because the volume in which they are located is too narrow for that, stop, here there is nothing more possible.
They spotted the position of this place and decided to attack it from the outside, that also corresponds to their primary objective, they came here first to take the fine limestone from the facing.
They clear the facing and a few stones from the infill and uncover the double rafters that form a roof.
A good deal is looming because a roof prefigures a secret room so why not a treasure!
The only way to get there was to break this roof to access the room, they start by making a hole to go down into the room, but there was a bad surprise, this room like the others was empty!
Entered from above, the rafters are now unstable, and still constitute a meager booty and are therefore withdrawn and then carried away, the upper part of the chamber having been removed, they broke the remaining north wall to remove the facing stones thus destroying forever this part of the pyramid that it is now impossible to reconstitute.
Their work of destruction does not stop there, they break the device that closed the gallery, now they have space to exert force and break the granite valve to remove it and put it aside so that the gallery descending is clear.
End of episode