Abstract Urban development often requires deep excavations, such as for deep basements, cut-and-cover tunnels, and underground transportation systems. Pressure from a confined aquifer can cause a sudden failure of a deep excavation and have disastrous effects on the surrounding buildings. In this study, a series of centrifugal model tests were conducted on different aquitards in Shanghai to investigate the failure process and types. Two types of failure were identified from the centrifugal model tests: local failure (sand piping and sand boiling) and general upheaval. An approach to the stability analysis of deep excavation against a confined aquifer was developed. To increase the reliability of the analytical approach, the calculated results were compared with the experimental results. The results showed good agreement.
Experimental and theoretical investigation on the stability of deep excavations against confined aquifers in Shanghai, China
KSCE Journal of Civil Engineering ; 20 , 7 ; 2746-2754
2016-01-22
9 pages
Article (Journal)
Electronic Resource
English
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