Method for determining pressure balance during screw conveyor replacement under pressure of earth pressure balance shield machine

The invention relates to the technical field of shield tunneling machines, in particular to a method for determining pressure balance when a screw conveyor of an earth pressure balance shield tunneling machine is replaced under pressure. Comprising the following steps: a soil bin leakproofness construction stage; a screw conveyor replacement stage; and returning to the tunneling stage. According to the method for determining the pressure balance during replacement of the screw conveyor under the pressure of the earth pressure balance shield machine, the whole process of replacement of the screw conveyor under the pressure is divided into a soil bin airtight construction stage, a screw conveyor replacement stage and a return tunneling stage, and the pressure balance in the three stages is comprehensively considered; the safety of the earth pressure balance shield tunneling machine in the whole construction process of replacing the screw conveyor under pressure can be more accurately guaranteed, and therefore t