redwing schreef op zaterdag 17 juni 2023 @ 22:45:
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Volgens eerdere geruchten wilden ze alleen de eilanden daar onder water zetten en daarom de dam maar een 'klein stukje' opblazen. Het blijkt alleen weer dat dat niet zo goed kan, zodra er een gat in zit wordt die vanzelf groter nl.
Ik weet niet of die geruchten waren ontkracht of dat er nog link naar is? Afgaande van NYT artikel was de insteek toch echt wel Max-pain als de aanname klopt dat er een onderhoudsruimte onder de structuur van de dam is gebruikt om de structuur zoveel mogelijk te verbrijzelen
Professor Baecher said it was possible, though unlikely, that water flow from the damaged gates somehow undermined the concrete structure where it sat on the riverbed. But he said an examination of the drawings indicated that the design had protected against that possibility with standard measures. One of those is a so-called “apron” of concrete on top of the riverbed to the downstream side of the dam.
Wat dus duid op dat met enige kennis van de dam niet is ingezet op beperkte schade, door bijvoorbeeld een aantal poorten van bovenaf (ipv van binnen) te targeten
Gregory B. Baecher, an engineering professor at the University of Maryland and a member of the National Academy of Engineers, also said the scale of the breach indicated that the underlying concrete barrier had failed, suggesting that charges had been set deep in the structure.
“If they put explosives in the gallery, that would explain a lot,” Professor Baecher said. A large explosion there, he said, “would just rip up all the concrete structure.”
Nick Glumac, an engineering professor and explosives expert at the University of Illinois at Urbana-Champaign, said the size of the necessary charge could vary widely depending on the exact way in which the explosives were set and the precise objective.
“It’s worth remembering that you don’t have to pulverize the dam section, just break it enough such that the water pressure is enough to tear it away,” Professor Glumac said.
Still, Professor Glumac said that based on diagrams of the dam and the latest imagery of the destroyed foundation, “It’s hard for me to see how anything other than an internal explosion in the passageway could account for the damage.” He added, “That’s a massive amount of concrete to move.”
Using the gallery might have another advantage for anyone seeking to hide their tracks. According to Mr. Strelets, the gallery had only two entrances, including one inside the machine room located in a building to one side of the dam.
Dr. West, who is also a former Army combat engineer officer, noted that would allow the dam to be rigged out of sight of spy satellites, drones or witnesses on the ground. Early morning drone footage showed that the initial breach in the dam occurred not far from the machine room.
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Verwijderd op 17-06-2023 23:43
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