Device and method for testing stability of shield excavation face in high-water-pressure stratum environment

The invention discloses a high-water-pressure stratum environment shield excavation face stability test device and method, and belongs to the technical field of shield tunnels, and the high-water-pressure stratum environment shield excavation face stability test device comprises a model box system, a stratum environment simulation system, a simulation shield tunneling system and a monitoring system. According to the device and the method, the research on the influence of shield slurry permeation or anti-mud-effect filling on the stability of a stratum and an excavation surface can be realized, and the influence of different slurry parameters and stratum water and soil loads on slurry diffusion can be well analyzed by matching the visual window with devices of different research objects; and meanwhile, the influence of the Kungfu filling on the stability of the excavation surface can be analyzed by replacing the Kungfu reinforcing device. A whole-ring tunneling channel is additionally arranged in the model box