The invention discloses a device and a method for preparing a true triaxial remolded sample by utilizing vacuum preloading. The device comprises a sealed top cover, a
test sample preparation frame, a drainage base, a saturation device and other main components, as well as
mating parts, such as a rubber mold, a rubber sealing
washer, a
preservative film and
filter paper. The sealed top cover is made of a rectangular hollow
flange plate; the
test sample preparation frame consists of a
flange plate and a rectangular frame, and the purposes of being easy to
cut and
settling and preserving a soil sample can be realized; the drainage base is made of a
solid flange plate, and is provided with a rectangular groove, drainage holes distributed in a plum-blossom type are formed in the groove to realize two functions of drainage and reserve of a
cutting layer, and a water collecting box is arranged on the other side of the base; the saturation device is arranged, so that the prepared soil sample can absorb water to be saturated. According to the device and method disclosed by the invention, the purposes of fast preparing a saturated
test sample with slightly high
moisture content can be realized, the density and
moisture content of the prepared test sample are accurate and uniform, secondary
cutting, disturbance and waste can be avoided, the production flow can be simplified, and the
research efficiency of true triaxial testing can be effectively improved.