Installation method for closure joint of immersed tunnel

Abstract

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 Ntube coupling; installing an Ntube coupling and pushing out a push-out segment; wherein, the first coordinate system is established at a tail end of an Ntube coupling, breakthrough points NS and NW are distributed at a head end and a tail end of a Ntube coupling respectively, breakthrough points DS and DW are distributed at a push-out segment, and breakthrough points NS and NW are distributed at a head end and a tail end of a Ntube coupling respectively; and coordinates of the breakthrough points DS, DW, NS, NW, NS, NW 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.