The present application discloses a final joint of an immersed tunnel, a prefabrication method and an installation method, wherein the final joint includes two end surfaces connected with installed adjacent tube sections; the two end surfaces are both tilted surfaces, so that the longitudinal profile of the final joint along an installation direction is of an inverted trapezoid structure; and the final joint further may be of a structure with a tube section I and a tube section II which are connected with each other. The final joint of the immersed tunnel is simple in structure, convenient to control and relatively high in precision, thereby reducing lots of open sea diving work and lowering a risk of installation quality defects; as prefabrication procedures are simple, the final joint may be prefabricated in a land factory and then transported to the site, thereby reducing influence of weather conditions on construction; a body structure of the final joint is prefabricated in the factory, and then the overall final joint is transported to the site for installation; water stop systems realize quick water stop, thus forming a dry construction environment; and therefore, the influence of weather and tidal current conditions on a project may be reduced, and a quality risk may be lowered.

The present application relates to an installation method for a closure joint of an immersed tunnel, and belongs to the technical field of closure joints; the installation method comprises the steps: establishing a first coordinate system; distributing feature points; installing the N.sub.+2 tube coupling; installing an N.sub.+1 tube coupling and pushing out a push-out segment; wherein, the first coordinate system is established at a tail end of an N.sub.+3 tube coupling, breakthrough points N.sub.+1S and N.sub.+1W are distributed at a head end and a tail end of a N.sub.+1 tube coupling respectively, breakthrough points DS and DW are distributed at a push-out segment, and breakthrough points N.sub.+2S and N.sub.+2W are distributed at a head end and a tail end of a N.sub.+2 tube coupling respectively; and coordinates of the breakthrough points DS, DW, N.sub.+1S, N.sub.+1W, N.sub.+2S, N.sub.+2W in the first coordinate system are calculated respectively; the installation method can improve the installation accuracy of the closure joint and is easy to operate.

The present application relates to an installation method for a closure joint of an immersed tunnel, and belongs to the technical field of closure joints; the installation method comprises the steps: establishing a first coordinate system; distributing feature points; installing the N.sub.+2 tube coupling; installing an N.sub.+1 tube coupling and pushing out a push-out segment; wherein, the first coordinate system is established at a tail end of an N.sub.+3 tube coupling, breakthrough points N.sub.+1S and N.sub.+1W are distributed at a head end and a tail end of a N.sub.+1 tube coupling respectively, breakthrough points DS and DW are distributed at a push-out segment, and breakthrough points N.sub.+2S and N.sub.+2W are distributed at a head end and a tail end of a N.sub.+2 tube coupling respectively; and coordinates of the breakthrough points DS, DW, N.sub.+1S, N.sub.+1W, N.sub.+2S, N.sub.+2W in the first coordinate system are calculated respectively; the installation method can improve the installation accuracy of the closure joint and is easy to operate.

A perforated structure mountable onto a seabed for establishing a deep-water port or an artificial island comprises: a plurality prefabricated perforated modules integratable into said structure; and at least one connector interconnecting corner portions of said prefabricated perforated modules. Each prefabricated perforated module has a corner portion comprising a concave surface such that said corner portions being integrated together into said structure form a cavity to be filled with a concrete. The connector comprises a crosspiece having three arms orthogonal to each other; each arm has a cross-like cross section. The crosspiece has reinforcing members at least partially mechanically connectable to said corner portions.

A perforated structure mountable onto a seabed for establishing a deep-water port or an artificial island comprises: a plurality prefabricated perforated modules integratable into said structure; and at least one connector interconnecting corner portions of said prefabricated perforated modules. Each prefabricated perforated module has a corner portion comprising a concave surface such that said corner portions being integrated together into said structure form a cavity to be filled with a concrete. The connector comprises a crosspiece having three arms orthogonal to each other; each arm has a cross-like cross section. The crosspiece has reinforcing members at least partially mechanically connectable to said corner portions.

The present invention provides a foot frame bottom plate type fixed part, a sealed inner lining structure, an underground chamber, belonging to the field of compressed air energy storage technology. The skeleton includes a fixed bottom plate and an umbrella shaped tripod, which is equipped with a connecting part and an umbrella shaped part. The umbrella shaped part is set at the top of the connecting part. The umbrella shaped tripod is fixedly connected to the fixed bottom plate in the length direction, forming a semi open containment space clamp. The sealing inner lining structure includes an airtight layer and a foot rest bottom plate shaped fixed part. The underground chamber includes a concrete lining layer and a sealed lining structure. Its construction period is shorter than that of welded steel plates, and the cost is lower.

The present invention provides a foot frame bottom plate type fixed part, a sealed inner lining structure, an underground chamber, belonging to the field of compressed air energy storage technology. The skeleton includes a fixed bottom plate and an umbrella shaped tripod, which is equipped with a connecting part and an umbrella shaped part. The umbrella shaped part is set at the top of the connecting part. The umbrella shaped tripod is fixedly connected to the fixed bottom plate in the length direction, forming a semi open containment space clamp. The sealing inner lining structure includes an airtight layer and a foot rest bottom plate shaped fixed part. The underground chamber includes a concrete lining layer and a sealed lining structure. Its construction period is shorter than that of welded steel plates, and the cost is lower.

An arrangement (400) for inhibiting water ingress across a construction joint, the arrangement (400) including: a footing (402) to be supported by a ground structure, the footing (402) including a floor defining a support surface (414), the footing (402) further including a sidewall (116) extending upwardly from the support surface (414); a structural wall element (424) supported by the support surface (414), the element (424) having an external skin (440) to be adjacent to the sidewall (116); a first sealing member (420) secured to the sidewall (116) of the footing (402) such that the first sealing member (420) opposes the external skin (440); and a joint seal (422) formed from a sealing material (433) located at a junction of the first sealing member (420), the footing (402) and the external skin (440), such that the sealing material (433) penetrates an interface between the first sealing member (420) and the structural wall element (424) without requiring access to the external skin (440) of the structural wall element.

An arrangement (400) for inhibiting water ingress across a construction joint, the arrangement (400) including: a footing (402) to be supported by a ground structure, the footing (402) including a floor defining a support surface (414), the footing (402) further including a sidewall (116) extending upwardly from the support surface (414); a structural wall element (424) supported by the support surface (414), the element (424) having an external skin (440) to be adjacent to the sidewall (116); a first sealing member (420) secured to the sidewall (116) of the footing (402) such that the first sealing member (420) opposes the external skin (440); and a joint seal (422) formed from a sealing material (433) located at a junction of the first sealing member (420), the footing (402) and the external skin (440), such that the sealing material (433) penetrates an interface between the first sealing member (420) and the structural wall element (424) without requiring access to the external skin (440) of the structural wall element.

A waterproof structure for a panel joint of an underground diaphragm wall includes a first waterstop and a first cover plate. The panel joint is provided with a wall connection plate. The underground diaphragm wall has an excavation surface. In a direction perpendicular to the excavation surface, the wall connection plate is arranged below the excavation surface of the underground diaphragm wall. A first accommodating groove is defined between the wall connection plate and the panel joint and adjacent to the excavation surface. The first waterstop is arranged in the first accommodating groove, and both wings of the first waterstop are respectively and adhesively bonded to the two sides of the panel joint. The first cover plate corresponds to the first accommodating groove and is arranged at the excavation surface. The first cover plate is detachably connected to the underground diaphragm wall.