A joint structure for the main structure and the roof of the connecting corridor includes a joint
insulation layer and symmetrically arranged upper and lower sealing structures. The sealing structures, from the inside out, consist of an arc-shaped plate, an elastic joint connecting plate, an installation plate, and an outer decorative panel. The arc-shaped groove design of the arc-shaped plate can absorb multi-dimensional displacement. The elastic joint connecting plate is slidably connected to the
expansion joint guard via a retaining strip, achieving dynamic deformation
adaptation. The joint
insulation layer fills the joint gaps, forming multiple waterproof barriers in conjunction with sealing rods,
sealant, and a double-layer waterproof structure. The installation plate and the outer decorative panel are connected by bolts and fasteners, enabling modular, rapid installation and easy disassembly and maintenance. This invention, through a flexible
deformation mechanism and integrated waterproof design, significantly improves the durability, construction efficiency, and maintenance convenience of the joint, making it suitable for complex conditions involving large-span connecting corridors and main structures.