Earth pressure balance type shield gushing discrimination method

The invention provides an earth pressure balance type shield gushing judgment method, which comprises the following steps of: establishing a geometric model of an earth cabin by taking an upper vertex of an earth inlet as a zero point, and solving an assumed two-dimensional seepage field analytical solution of the earth cabin by utilizing a variable separation method; establishing a one-dimensional model of the seepage field of the screw conveyor; determining a real two-dimensional seepage field analytical solution of the soil cabin and a real one-dimensional seepage field analytical solution of the screw conveyor; and judging the gushing possibility of different stratums by combining the water pressure of the soil discharging opening of the screw conveyor. The one-dimensional seepage field analytical solution in the spiral conveyor is determined through the water flow obtained through the soil cabin and the water head of the soil discharging opening, and then the seepage field in the shield is determined acc