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A sink hole and caves caused by earth balance shield and digital twin observational method to control face stability

Iwasaki, Y. et al.
REPOSITORY.ENU · Papers
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A sink hole was found at ground surface in a residential area in Tokyo in October 2020. The site was above a construction line of earth pressure balance shield tunnel with16.1 m in diameter and the crown at the depth of GL-47m. Further study revealed the dense sand layer above the tunnel has b
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