The invention discloses a synchronous grouting electroosmosis enhancing device and method for
shield tunneling, and belongs to the technical field of underground
engineering, the device is integrated at the shield
tail of a
shield tunneling machine, and the device comprises a grouting
system, an electroosmosis
system and an
intelligent control system. The grouting system is used for injecting
grout into an annular gap between the shield
tail and the tunnel segment; the electroosmosis system establishes a direct-
current electric field in the
slurry and the adjacent soil body through a first
electrode, a second
electrode and a direct-current power supply which are arranged at the
tail end of the shield tail so as to accelerate
dehydration and solidification of the
slurry; and the
intelligent control system cooperatively controls the grouting and electroosmosis processes according to the real-time working condition parameters. The method is based on the device, a direct-
current electric field is applied while or after grouting, water is promoted to migrate directionally,
grout solidification is accelerated, and
automatic process control is achieved by monitoring grouting pressure and electroosmosis current. The method can effectively improve the early strength of the
slurry, inhibit the floating and displacement of duct pieces and reduce stratum settlement, and is especially suitable for shield
tunnel construction in soft stratums.