Bottom Compartment for Bottom Sealing of Underwater Sub-cabin of Large Cofferdam and Construction Method of Sub-cabin Bottom Cover

The invention discloses a bottom compartment for bottom sealing of an underwater sub-cabin of a large cofferdam, which relates to the technical field of bridge construction, it is used to separate thecofferdam and seal the bottom, it is characterized that the bottom compartment is composed of at least two compartments, the bulkhead section comprises a truss, at least one side of the truss is provided with a panel, the two panels are sealed and connected, and all the panels can enclose a sealed dividing surface. The bottom compartment for the bottom sealing of the underwater sub-cabin of the large cofferdam provided by the invention is provided with a plurality of bay sections, the structure is simple, the dead weight of each bay section is small, the lowering is convenient, and the cofferdam can be applied to the bottom sealing of the underwater sub-cabin of the large cofferdam and has better construction quality. 本发明公开了种大型围堰水下分舱封底用的底隔舱，涉及桥梁施工技术领域，其用于对围堰进行分舱封底，其特征在于，所述底隔舱由至少两个隔舱段拼装而成，所述隔舱段包括桁架，所述桁架至少侧设有面板，两个所