@mechdisk00: Kansai International Airport in Japan stands on a man-made island in the sea, and the whole island is sinking. It has already dropped about 45 feet and still falls roughly two inches a year, because the seabed is deep, waterlogged clay that squeezes like a sponge under the island's weight. Engineers first made the ground sink on purpose, driving a million sand drains into the clay to squeeze decades of settlement into about a year. Then they gave up beating the deeper sinking altogether: sensors watch 900 columns under the terminal, and every few years workers jack up the columns that dropped and shim them with steel plates. Sources: • Kansai International Airport — Wikipedia — https://en.wikipedia.org/wiki/Kansai_International_Airport • Kansai Airports — Characteristics of the Strata — https://www.kansai-airports.co.jp/en/sustainability/society/tech-strata-characteristics/ • Kansai Airports — Countermeasures for and Status of Subsidence — https://www.kansai-airports.co.jp/en/sustainability/society/tech-subsidence-countermeasures/ #kansaiairport #sinkingairport #geotechnical #civilengineering #engineering
