Underwater Excavation and Underwater Mass Concrete Sealing Construction Technology for Circular Air Shaft

For foundation pit projects with large excavation depth, great thickness, and burial depth of the confined aquifer, which makes it difficult for the waterproof curtain to penetrate the confined aquifer, using underwater excavation can effectively prevent the occurrence of basement surge and improve the stress and deformation status of the retaining structure. The setting of underwater bottom sealing concrete can withstand the enormous pressure of the pit bottom, which is a key measure to ensure the implementation of the project.