The invention discloses a vacuum-vertical shaft-electroosmosis combined
dehydration test device for waste mud, and belongs to the technical field of geotechnical tests. The device is composed of a modular model cylinder, a direct-current power supply
system, a measuring
system, a
vacuum pump and a vertical vacuum drainage body. The model cylinder is formed by connecting a top cylinder, a middle cylinder and a bottom cylinder through bolts and stacking sealing rings, the height can be flexibly adjusted, and good
air tightness is kept. And the cylinder side is provided with a standard quick-plug interface, so that a vacuum meter and a pore
pressure sensor can be conveniently connected. An
anode electrode plate and a
cathode electrode plate which are connected with a direct-current power supply are respectively arranged on the top surface and the bottom surface of the
slurry, and the vertical vacuum drainage body penetrates through the bottom horizontal drainage layer and is fixed on the positioning frame to form a vacuum-vertical shaft combined drainage channel. The device effectively overcomes the problems of
vacuum pressure transmission attenuation, overlong drainage path, non-uniform electroosmosis
dehydration and the like through the
coupling effect of vacuum, the vertical shaft and electroosmosis, can realize accurate research on different depth
dehydration mechanisms of
slurry, and has the advantages of rapid dehydration, simplicity and convenience in operation,
environmental protection and high efficiency.