[…] Shaft 20B (1992) Location:New York, New York Client:Schiavone Construction Company Description: Construction of a 46-foot diameter, 300-foot deep shaft was attempted using the slurry diaphragm wall method for earth support and groundwater control. During the initial excavation, three breeches in the joints between slurry wall panels created significant inflows of groundwater and loose sandy […]
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