The invention provides a water-bottom mine shield tunnel combination
butt joint structural form and a construction method thereof and relates to the technical field of
urban rail transit construction. A bench
cut method is adopted for excavation from a mine tunneling method tunnel section, receiving section tunnel primary support construction is conducted, and a bottom sub wall is closed when excavation is conducted to a
butt joint point; the stratum in front of a
butt joint section is subjected to grouting reinforcement; then a receiving section is poured to close a box body lining, and the box body lining is filled with
cement mortar; then a
shield machine conducts constant-speed tunneling and enters the box body lining after directly breaking the bottom sub wall and the filled
cement mortar; a cutterhead of the
shield machine is arranged to be detachable, then a hoisting point is arranged on a
shield machine outer shell, all components of the shield
machine are detached and conveyed out from the position, on the rear side, of a shield
machine tunnel, and the steel shell of the shield
machine is left in a hole; and finally, a secondary lining is constructed in the tunnel for connecting all the sections. The water-bottom mine shield tunnel combination butt joint structural form and the construction method thereof are suitable for butt joint construction, adopting a mining method and a shield method, of the
underwater and
subsea tunnel and an underground structure,
structural stability and construction safety are good, and the
organizational form of the shield construction method is enriched.