Indoor geotechnical triaxial test isolation device and test method

The invention discloses an indoor geotechnical triaxial test isolation device and a test method. The indoor geotechnical triaxial test isolation device is used for blocking a soil corrosive pore water solution to prevent the soil corrosive pore water solution from directly contacting a pore pressure device during a triaxial test. The device comprises a top cover, a base, an isolation chamber and an inner cylinder, the upper part of the inner cylinder is opened and communicated with the isolation chamber, and the lower part of the inner cylinder is fixed on the base; an oil filling hole and an exhaust hole are formed in the top cover; the oil filling hole is positioned in the center of the top cover and is used for filling isolation oil into the inner cylinder; the exhaust hole is used for exhausting gas in the isolation chamber; water injection holes are formed in the base, and the first water injection hole 1 is located between the isolation chamber and the inner cylinder, connected with an external pore pre