The invention discloses a method and a device for preparing a silty soil triaxial-test
test sample. The method comprises the following steps: adding
distilled water into silty soil and stirring to enable soil samples to be in a flow plastic state, namely
slurry; precipitating the
slurry in a split round die under the action of
self weight; applying dead loads to the upper part of the
test sample, removing the dead loads at the upper part of the
test sample and enabling the test sample to be further solidified by adopting a vacuum negative pressure of minus 40 kPa, wherein in the process of applying the dead loads, to guarantee that the
slurry does not overflow, the loads are slowly and gradually loaded and a next-stage load is applied after the soil samples complete solidification and drainage under a
current load; and finally, removing the negative pressure and the split round die and completing preparation of the test sample, so that triaxial
test equipment can be assembled to carry out static triaxial or dynamic triaxial test. The method and the device are simple to operate; the technical method is easy to master; equipment required for preparing the test sample is very simple; required test
sample preparation cost is low; uniformity inside the soil samples is very good;
reproduction degree between the soil samples is high; a
microstructure of a soil layer in the nature can be reproduced to a higher degree; the soil samples do not need to be
cut; disturbance is reduced; and the test result has high credibility.