Immersed tunnel rapid construction method based on flat ground pipe joint prefabrication

The invention relates to a rapid immersed tunnel construction method based on flat ground pipe joint prefabrication, which comprises the following steps of: directly prefabricating an immersed pipe joint on the flat ground, jacking through a jack pre-buried at the bottom of the side wall of the immersed pipe joint after prefabrication, and assisting in translation of the pipe joint in a manner of loading an inflatable airbag at the bottom of the pipe joint after jacking. When the immersed tube section is translated to a water area near a prefabrication site, the tube section is transferred from the land to the water area through a matched lifting mechanism, then the tube section is hauled to a sinking position for sinking butt joint, and finally the immersed tube tunnel is formed. According to the rapid construction method for the immersed tunnel, excavation of a large temporary dry dock is not needed, the engineering amount is small, the construction period is short, the engineering cost is low, the occupied