CSTR:11738.11.ncdc.LANDSLIDE.db2034.2022
10.12072/ncdc.LANDSLIDE.db2034.2022
The water holding capacity curve tests of loess in different strata in typical areas of the Loess Plateau are carried out by using the pressure plate instrument. The experimental tests of the effects of sodium chloride salt concentration, different cation types, fine particle content, coarse particle content, undisturbed and remolded disturbance effect on the water holding capacity curve of loess are tested and analyzed.
Manually collect soil samples at different levels.
Place the prepared saturated loess ring knife sample on the high permeability ceramic disc in the closed air pressure chamber of the instrument, and make the sample fully contact with the disc. Then install and fix the top cover of the instrument to ensure that there is no air leakage in the pressure chamber. During the test, the matrix suction is controlled by increasing the air pressure. With the increase of matrix suction, the pore water is discharged until there is no water at the bottom of the ceramic disc. Generally, the time for each level of matrix suction to reach the equilibrium state generally ranges from three days to one week, which depends on the permeability of the sample. After the suction of each stage reaches the equilibrium state, the ring knife sample is weighed and the corresponding volume water content is calculated.
The operation specification complies with the standard process and the data is good.
| # | number | name | type |
| 1 | 2018YFC1504702 | National key R & D plan |
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