Lubyanka (Moscow Metro)
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Lubyanka is a station on the Sokolnicheskaya Line of the Moscow Metro, located under Lubyanka Square. It opened in 1935 as part of the first stage of the Metro. Construction work on the station began in December 1933, and the engineers were faced with extremely difficult soil conditions from the outset. The area under Lubyanka square is made of Jurassic clay, beneath which are layers of quicksand and Carboniferous clay. The Metro station was planned to rest on top of…mehr

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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Lubyanka is a station on the Sokolnicheskaya Line of the Moscow Metro, located under Lubyanka Square. It opened in 1935 as part of the first stage of the Metro. Construction work on the station began in December 1933, and the engineers were faced with extremely difficult soil conditions from the outset. The area under Lubyanka square is made of Jurassic clay, beneath which are layers of quicksand and Carboniferous clay. The Metro station was planned to rest on top of the Carboniferous clay, which was thought to be firm enough to support its weight. It was quickly discovered, however, that the clay was much softer than anticipated due to the proximity of an underground channel of the Neglinnaya River and also tended to swell greatly when exposed to air.