The Dalian Bay Subsea Tunnel is constructed using the immersed tube method,where 18 sections of immersed tubes are prefabricated using a fixed dry-dock.The dock entrance serves as a protective barrier between the dry-dock and the sea,playing a crucial role in ensuring dock safety by preventing water ingress and providing wave protection.On the premise of safety and economy,it is necessary to take into account the convenience of construction and the ease of use.On the basis of summarizing the typical dock gate types for prefabrication of immersed tubes both domestically and internationally,this project adopts the fixed dry dock method,gravity-type dock entrances,and large floating caisson gate system.The dock entrance system incorporates curtain grouting,water stop strips,steel gates,and concrete structure water stop system,and is equipped with the energy dissipation self-flowing water dock gate pier structure.The caisson of floating dock gate adopts cast-in-situ scheme,which can provide reference for similar projects.
dock entrance structurewater stop structurefloating gatesuper large caisson
维普
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