Shield tunneling machine tunneling parameter control method based on shield tunnel longitudinal displacement

The invention relates to a shield tunneling machine tunneling parameter control method based on shield tunnel longitudinal displacement, which comprises the following steps of: firstly, determining a theoretical calculation length according to the strength increasing time and tunneling speed of slurry behind a wall; secondly, considering nonlinear volume-related plastic deformation of the surrounding rock in the surrounding rock excavation and unloading process, and calculating an equivalent foundation resistance coefficient of the synergistic effect of the surrounding rock and the lining structure; then, considering the slippage boundary condition of the other end when the segment assembly type structure is jacked, and constructing a tunnel longitudinal displacement calculation model capable of considering surrounding rock volume related plastic deformation and wall back grouting slurry solidification timeliness; and finally, predicting the longitudinal displacement of the tunnel with the segment assembled s